MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 db17b903e869422284b9cd4fe43f84af38283fa5cbafb973cc12db7c2c154005. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.

Database Entry


Formbook


Vendor detections: 15


Intelligence 15 IOCs YARA 27 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: db17b903e869422284b9cd4fe43f84af38283fa5cbafb973cc12db7c2c154005
SHA3-384 hash: a58e06852d75103d2c53cfd7babf0ad4e8a53ee872e9f6fc5e6821bab800824e20d6d8cdd135b4c40ef42dcb04f3cc4f
SHA1 hash: 5f792d82df7a59e015f04c58bf3965fc09da033d
MD5 hash: be74b081738e8fb2888c9fcefb715df9
humanhash: nebraska-freddie-ceiling-angel
File name:LETTER 03-11.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'180'160 bytes
First seen:2025-03-12 11:34:47 UTC
Last seen:2025-03-13 07:52:49 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash afcdf79be1557326c854b6e20cb900a7 (1'102 x FormBook, 936 x AgentTesla, 399 x RemcosRAT)
ssdeep 24576:/u6J33O0c+JY5UZ+XC0kGso6Fa+NpDi/RYNgwzMHyCWY:Ju0c++OCvkGs9Fa+NpocFY
TLSH T1B945CF2273DDC360CB669173BF69B7016EBF7C614630B85B2F880D7DA960161162DBA3
TrID 63.7% (.CPL) Windows Control Panel Item (generic) (57583/11/19)
11.6% (.EXE) Win64 Executable (generic) (10522/11/4)
7.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
5.5% (.EXE) Win16 NE executable (generic) (5038/12/1)
4.9% (.EXE) Win32 Executable (generic) (4504/4/1)
Magika pebin
dhash icon aae2f3e38383b629 (2'034 x Formbook, 1'183 x CredentialFlusher, 666 x AgentTesla)
Reporter lowmal3
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
493
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
LETTER 03-11.exe
Verdict:
No threats detected
Analysis date:
2025-03-12 11:36:10 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/734c6fc6-5431-428a-bd05-3dd8d9b67014

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67d17677dff6bd92190880a3
Tags:
autoit emotet
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file in the %temp% directory
Launching a process
Сreating synchronization primitives
Unauthorized injection to a system process
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
adaptive-context anti-vm anti-vm autoit compiled-script evasive extrac32 fingerprint keylogger lolbin microsoft_visual_cc packed packed packer_detected
Link:
https://www.filescan.io/uploads/67d171763c5f644bd94f1759/reports/aed437fc-7093-4d3c-acb7-04242f462062/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/db17b903e869422284b9cd4fe43f84af38283fa5cbafb973cc12db7c2c154005
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/54611e25-2b34-4886-85bc-04db39122db4
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1636127
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
Binary is likely a compiled AutoIt script file
Found direct / indirect Syscall (likely to bypass EDR)
Joe Sandbox ML detected suspicious sample
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Suricata IDS alerts for network traffic
Switches to a custom stack to bypass stack traces
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Writes to foreign memory regions
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1636127 Sample: LETTER 03-11.exe Startdate: 12/03/2025 Architecture: WINDOWS Score: 100 28 www.joyesi.xyz 2->28 30 www.techchains.info 2->30 32 17 other IPs or domains 2->32 42 Suricata IDS alerts for network traffic 2->42 44 Malicious sample detected (through community Yara rule) 2->44 46 Antivirus detection for URL or domain 2->46 50 6 other signatures 2->50 10 LETTER 03-11.exe 2 2->10         started        signatures3 48 Performs DNS queries to domains with low reputation 28->48 process4 signatures5 62 Binary is likely a compiled AutoIt script file 10->62 64 Writes to foreign memory regions 10->64 66 Maps a DLL or memory area into another process 10->66 13 svchost.exe 10->13         started        process6 signatures7 68 Maps a DLL or memory area into another process 13->68 16 2q2RTYpDM.exe 13->16 injected process8 signatures9 40 Found direct / indirect Syscall (likely to bypass EDR) 16->40 19 netbtugc.exe 13 16->19         started        process10 signatures11 52 Tries to steal Mail credentials (via file / registry access) 19->52 54 Tries to harvest and steal browser information (history, passwords, etc) 19->54 56 Modifies the context of a thread in another process (thread injection) 19->56 58 3 other signatures 19->58 22 2q2RTYpDM.exe 19->22 injected 26 firefox.exe 19->26         started        process12 dnsIp13 34 www.rssnewscast.com 91.195.240.94, 49733, 49734, 49735 SEDO-ASDE Germany 22->34 36 elettrosistemista.zip 195.110.124.133, 49741, 49742, 49743 REGISTER-ASIT Italy 22->36 38 5 other IPs or domains 22->38 60 Found direct / indirect Syscall (likely to bypass EDR) 22->60 signatures14
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/db17b903e869422284b9cd4fe43f84af38283fa5cbafb973cc12db7c2c154005
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/db17b903e869422284b9cd4fe43f84af38283fa5cbafb973cc12db7c2c154005/
Threat name:
Win32.Trojan.AutoitInject
Create hunting rule
Status:
Malicious
First seen:
2025-03-11 16:06:36 UTC
File Type:
PE (Exe)
Extracted files:
27
AV detection:
26 of 38 (68.42%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=3ml3sa7infbcfbfzzvh6ip4ev44cqp5fzox3s46mclnxylaviacq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
unc_loader_036
Create hunting rule
Similar samples:
error
Formbook
Result
Malware family:
n/a
Score:
  7/10
Tags:
discovery
Link:
https://tria.ge/reports/250312-np3r2azrs5/
Behaviour
Modifies Internet Explorer settings
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Program crash
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Loads dropped DLL
Verdict:
Malicious
Tags:
trojan
YARA:
SUSP_Imphash_Mar23_3
Link:
https://app.threat.zone/submission/f4ab0b86-be38-4e31-9cdf-de221dead939
Unpacked files
SH256 hash:
db17b903e869422284b9cd4fe43f84af38283fa5cbafb973cc12db7c2c154005
MD5 hash:
be74b081738e8fb2888c9fcefb715df9
SHA1 hash:
5f792d82df7a59e015f04c58bf3965fc09da033d
Link:
https://www.unpac.me/results/59a75211-4a28-46b6-92e5-2b993d16618a/
SH256 hash:
3ff88985b936faf56a55e8abb8cceaedbb6a84bb30df99b2342c9eb5efc8ac56
MD5 hash:
9b596acda3c7321210d4265cd0b15bde
SHA1 hash:
19e6cefdbb06149156ec10d7edac0cf5ab9360bd
Link:
https://www.unpac.me/results/59a75211-4a28-46b6-92e5-2b993d16618a/
SH256 hash:
1e0737bff338544c8b4bdd6c9b1d31f0394906c9b266237061aa1df02be2cb0e
MD5 hash:
1de97b6ef63ece49d7a17d6868b17a40
SHA1 hash:
34f6cf1ceea8aa893ef2cf259d244be32ad7553c
Link:
https://www.unpac.me/results/59a75211-4a28-46b6-92e5-2b993d16618a/
SH256 hash:
c77f8e3d32fbfd5820916e6c12874e820e4ed9d5c671b1abf2422ba7170ca681
MD5 hash:
48a15d2b8a79103b2ab5c494e49a4ba1
SHA1 hash:
399b2e54d312b928cf1954b809df3b301f83a508
Link:
https://www.unpac.me/results/59a75211-4a28-46b6-92e5-2b993d16618a/
SH256 hash:
16b893a138b65a981fc3630d142b70336c8fbf0c13fffad8f55d080bb3d92e67
MD5 hash:
4ece9ff05583d34410ad296c790009c8
SHA1 hash:
69947f1409ed8e243a10f2001e98e284655b0ada
Link:
https://www.unpac.me/results/59a75211-4a28-46b6-92e5-2b993d16618a/
SH256 hash:
00b5caef1d7788d744f0b2cdb93b2cfc9c19d441b990e3e214572b3aafacb4c8
MD5 hash:
7f9847ee5ecd7f1314d33730923f8e08
SHA1 hash:
7faa4cdafe23b3021fe7cb6fd6c16a00274d2831
Link:
https://www.unpac.me/results/59a75211-4a28-46b6-92e5-2b993d16618a/
SH256 hash:
d16539a6798a2760c6436faf21c962a65900043f6096ba8165203a9d2d40b530
MD5 hash:
f262dbb757f8a142930bace8e93a988f
SHA1 hash:
bb74f86133ac04005cef83d31a74a3db52095d16
Link:
https://www.unpac.me/results/59a75211-4a28-46b6-92e5-2b993d16618a/
SH256 hash:
95d4e6d867da09d9fb2302ef94d540644204068b149018da9258cc36397ffbd2
MD5 hash:
136616fdb1e67935a6142086452e8eef
SHA1 hash:
c14840db3410d29d1a16822b917dacf1860b98eb
Link:
https://www.unpac.me/results/59a75211-4a28-46b6-92e5-2b993d16618a/
SH256 hash:
9f9fd098bd246d7e73797ad12796d2cac30b6d0f94a6258cb3457a68a76972e2
MD5 hash:
66fffd581133e3c2f5845adc8e0d7917
SHA1 hash:
77f08c24daf55ca331687a44bb4dfe55cde849e1
Detections:
win_formbook_w0
Create hunting rule
win_formbook_g0
Create hunting rule
Windows_Trojan_Formbook
Create hunting rule
Link:
https://www.unpac.me/results/59a75211-4a28-46b6-92e5-2b993d16618a/
Parent samples :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:
Malicious
Link:
https://www.vmray.com/analyses/_mb/db17b903e869/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/db17b903e869422284b9cd4fe43f84af38283fa5cbafb973cc12db7c2c154005

YARA Signatures

MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.

Rule name:AutoIT_Compiled
Create hunting rule
Author:@bartblaze
Description:Identifies compiled AutoIT script (as EXE). This rule by itself does NOT necessarily mean the detected file is malicious.
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__GlobalFlags
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Active
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Thread
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:Formbook
Create hunting rule
Author:kevoreilly
Description:Formbook Payload
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:meth_stackstrings
Create hunting rule
Author:Willi Ballenthin
Rule name:pe_no_import_table
Create hunting rule
Description:Detect pe file that no import table
Rule name:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SEH__vectored
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns
Rule name:SUSP_Imphash_Mar23_3
Create hunting rule
Author:Arnim Rupp (https://github.com/ruppde)
Description:Detects imphash often found in malware samples (Maximum 0,25% hits with search for 'imphash:x p:0' on Virustotal) = 99,75% hits
Reference:Internal Research
Rule name:Sus_Obf_Enc_Spoof_Hide_PE
Create hunting rule
Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)
Rule name:Windows_Generic_Threat_aeaeb5cf
Create hunting rule
Author:Elastic Security
Rule name:Windows_Trojan_Formbook
Create hunting rule
Author:@malgamy12
Rule name:Windows_Trojan_Formbook_1112e116
Create hunting rule
Author:Elastic Security
Reference:https://www.elastic.co/security-labs/formbook-adopts-cab-less-approach
Rule name:win_formbook_w0
Create hunting rule
Author:@malgamy12

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Malspam

Formbook

Executable exe db17b903e869422284b9cd4fe43f84af38283fa5cbafb973cc12db7c2c154005

(this sample)

  
Delivery method
Distributed via e-mail attachment

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (HIGH_ENTROPY_VA)high
CHECK_NXMissing Non-Executable Memory Protectioncritical
Reviews
IDCapabilitiesEvidence
AUTH_APIManipulates User AuthorizationADVAPI32.dll::AllocateAndInitializeSid
ADVAPI32.dll::CopySid
ADVAPI32.dll::FreeSid
ADVAPI32.dll::GetLengthSid
ADVAPI32.dll::GetTokenInformation
ADVAPI32.dll::GetAce
COM_BASE_APICan Download & Execute componentsole32.dll::CLSIDFromProgID
ole32.dll::CoCreateInstance
ole32.dll::CoCreateInstanceEx
ole32.dll::CoInitializeSecurity
ole32.dll::CreateStreamOnHGlobal
MULTIMEDIA_APICan Play MultimediaWINMM.dll::mciSendStringW
WINMM.dll::timeGetTime
WINMM.dll::waveOutSetVolume
SECURITY_BASE_APIUses Security Base APIADVAPI32.dll::AddAce
ADVAPI32.dll::AdjustTokenPrivileges
ADVAPI32.dll::CheckTokenMembership
ADVAPI32.dll::DuplicateTokenEx
ADVAPI32.dll::GetAclInformation
ADVAPI32.dll::GetSecurityDescriptorDacl
SHELL_APIManipulates System ShellSHELL32.dll::ShellExecuteExW
SHELL32.dll::ShellExecuteW
SHELL32.dll::SHFileOperationW
WIN32_PROCESS_APICan Create Process and ThreadsADVAPI32.dll::CreateProcessAsUserW
KERNEL32.dll::CreateProcessW
ADVAPI32.dll::CreateProcessWithLogonW
KERNEL32.dll::OpenProcess
ADVAPI32.dll::OpenProcessToken
ADVAPI32.dll::OpenThreadToken
WIN_BASE_APIUses Win Base APIKERNEL32.dll::TerminateProcess
KERNEL32.dll::SetSystemPowerState
KERNEL32.dll::LoadLibraryA
KERNEL32.dll::LoadLibraryExW
KERNEL32.dll::LoadLibraryW
KERNEL32.dll::GetDriveTypeW
WIN_BASE_EXEC_APICan Execute other programsKERNEL32.dll::WriteConsoleW
KERNEL32.dll::ReadConsoleW
KERNEL32.dll::SetStdHandle
KERNEL32.dll::GetConsoleCP
KERNEL32.dll::GetConsoleMode
WIN_BASE_IO_APICan Create FilesKERNEL32.dll::CopyFileExW
KERNEL32.dll::CopyFileW
KERNEL32.dll::CreateDirectoryW
KERNEL32.dll::CreateHardLinkW
IPHLPAPI.DLL::IcmpCreateFile
KERNEL32.dll::CreateFileW
WIN_BASE_USER_APIRetrieves Account InformationKERNEL32.dll::GetComputerNameW
ADVAPI32.dll::GetUserNameW
ADVAPI32.dll::LogonUserW
ADVAPI32.dll::LookupPrivilegeValueW
WIN_NETWORK_APISupports Windows NetworkingMPR.dll::WNetAddConnection2W
MPR.dll::WNetUseConnectionW
WIN_REG_APICan Manipulate Windows RegistryADVAPI32.dll::RegConnectRegistryW
ADVAPI32.dll::RegCreateKeyExW
ADVAPI32.dll::RegDeleteKeyW
ADVAPI32.dll::RegOpenKeyExW
ADVAPI32.dll::RegQueryValueExW
ADVAPI32.dll::RegSetValueExW
WIN_USER_APIPerforms GUI ActionsUSER32.dll::BlockInput
USER32.dll::CloseDesktop
USER32.dll::CreateMenu
USER32.dll::EmptyClipboard
USER32.dll::FindWindowExW
USER32.dll::FindWindowW

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