MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 3a819761112c8338848165619bd06586a043f121647bd9be44a4ef8a4d3c91f4. 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: 14


Intelligence 14 IOCs YARA 12 File information Comments
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SHA256 hash: 3a819761112c8338848165619bd06586a043f121647bd9be44a4ef8a4d3c91f4
SHA3-384 hash: f7b686cc0cb84f55fcb45171abd0eaaf19c2b7a3f5e168c2b09ee9e746b2a928aa2e705c2f88dfb86ab914b4d8e4376e
SHA1 hash: 1f3d8ea8e3b21a46547612de03e2f279db504ead
MD5 hash: 9ad650b38763b2ffb66490507ff8665f
humanhash: snake-oven-football-monkey
File name:3a819761112c8338848165619bd06586a043f121647bd9be44a4ef8a4d3c91f4
Download: download sample
Signature Formbook
Create hunting rule
File size:1'177'088 bytes
First seen:2025-02-07 14:29:18 UTC
Last seen:2025-02-07 15:42:24 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash afcdf79be1557326c854b6e20cb900a7 (1'102 x FormBook, 936 x AgentTesla, 399 x RemcosRAT)
ssdeep 24576:1AHnh+eWsN3skA4RV1Hom2KXFmIax72rFywNyaiBkIU5:kh+ZkldoPK1XaxSZySxR
Threatray 201 similar samples on MalwareBazaar
TLSH T17445BD0273D2C036FFAB92739B6AF64156BC79254123852F13981DB9BD701B2273E663
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
File icon (PE):PE icon
dhash icon aae2f3e38383b629 (2'034 x Formbook, 1'183 x CredentialFlusher, 666 x AgentTesla)
Reporter adrian__luca
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
441
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
3a819761112c8338848165619bd06586a043f121647bd9be44a4ef8a4d3c91f4
Verdict:
Malicious activity
Analysis date:
2025-02-07 18:30:24 UTC
Tags:
autoit
Link:
https://app.any.run/tasks/75a671c9-92d1-4d6a-8d38-840daf87a193

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Trojan.AutoIt.1584.15696.7045.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
94.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67a61a6eab8a2d1c6bcd88bb
Tags:
autoit emotet
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Creating a file in the %temp% directory
Launching a process
Сreating synchronization primitives
Unauthorized injection to a system process
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/3a819761112c8338848165619bd06586a043f121647bd9be44a4ef8a4d3c91f4
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/fb903fff-17c4-443e-8aa5-2196a23f11ae
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
evad.troj.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1609403
Signature
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
Machine Learning detection for sample
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: 1609403 Sample: 99UbUXnwA9.exe Startdate: 07/02/2025 Architecture: WINDOWS Score: 100 28 www.l33900.xyz 2->28 30 www.031233226.xyz 2->30 32 12 other IPs or domains 2->32 42 Suricata IDS alerts for network traffic 2->42 44 Antivirus detection for URL or domain 2->44 46 Multi AV Scanner detection for submitted file 2->46 50 4 other signatures 2->50 10 99UbUXnwA9.exe 4 2->10         started        signatures3 48 Performs DNS queries to domains with low reputation 30->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 68 Switches to a custom stack to bypass stack traces 10->68 13 svchost.exe 10->13         started        process6 signatures7 70 Maps a DLL or memory area into another process 13->70 16 uvpwDgkBQi5NG.exe 13->16 injected process8 signatures9 40 Found direct / indirect Syscall (likely to bypass EDR) 16->40 19 sfc.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 uvpwDgkBQi5NG.exe 19->22 injected 26 firefox.exe 19->26         started        process12 dnsIp13 34 www.l33900.xyz 162.218.30.235, 50010, 50011, 50012 ANT-CLOUDUS United States 22->34 36 www.cruycq.info 47.83.1.90, 50002, 50003, 50004 VODANETInternationalIP-BackboneofVodafoneDE United States 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/3a819761112c8338848165619bd06586a043f121647bd9be44a4ef8a4d3c91f4
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/3a819761112c8338848165619bd06586a043f121647bd9be44a4ef8a4d3c91f4/
Threat name:
Win32.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2025-01-29 12:44:15 UTC
File Type:
PE (Exe)
Extracted files:
28
AV detection:
26 of 38 (68.42%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=hkazoyirfsbtrbebmvqzxudfq2qeh4jbmr55tpseutxyutj4sh2a._file
Verdict:
malicious
Label(s):
unknown_loader_036
Create hunting rule
Similar samples:
14afabf1b6529948a51bdca04dcc1f7d545005640558cbe44b1a179a3bab747f
Formbook
2b23a643932b66238ce745c1bc384c9bda19f47c130fb3434d92e69e98203cd5
Formbook
3ed6391d2416f3ef8e1be5ba9da91b6870ab32b865e49b0cfeb3444028530cab
Formbook
420f888c8bc5a5e5c71b6c157e7a8ed83527bb4893605f7c827cccd89f286cbc
Formbook
9a10f72a1821dba72222e2edbed96dda2192ddd03b51744b24dc5fb05f635df8
Formbook
c0278e525cf825a946ba05857fc2c7de1ab77b94ad1587beca4311118510ffc3
Formbook
e232f8344f6c183e783887263b5da10fbec109249b628dba960a4b60ff52a36f
Formbook
error
Formbook
fee05a6bc4233e8fba7f346a710bcbc8b3e019149feb15b395b6d8db7819e9f7
Formbook
+ 191 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  5/10
Tags:
discovery
Link:
https://tria.ge/reports/250207-rtqj2strgw/
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
System Location Discovery: System Language Discovery
AutoIT Executable
Suspicious use of SetThreadContext
Verdict:
Malicious
Tags:
trojan
YARA:
SUSP_Imphash_Mar23_3
Link:
https://app.threat.zone/submission/022bf7b5-56b2-431d-9738-f7c651e909b1
Unpacked files
SH256 hash:
3a819761112c8338848165619bd06586a043f121647bd9be44a4ef8a4d3c91f4
MD5 hash:
9ad650b38763b2ffb66490507ff8665f
SHA1 hash:
1f3d8ea8e3b21a46547612de03e2f279db504ead
Link:
https://www.unpac.me/results/8a4afe95-7f7d-4404-88f2-77961ad2c733/
SH256 hash:
a0a9a17942f4b7510b430458433c4b35637fe682b0fbbeeda69bc634820f84eb
MD5 hash:
7b1f53512780e68d7a943dc55ff57a98
SHA1 hash:
bc082b4c30399529ad308d51938a4223d65c783e
Link:
https://www.unpac.me/results/8a4afe95-7f7d-4404-88f2-77961ad2c733/
SH256 hash:
7516ed8721e17ed5ae0e9b1de506c1220d873024f873350ce0f442391ea3f34c
MD5 hash:
908e6d291bc50eebb293e637b4477126
SHA1 hash:
ffabf93c1e2f39da23ae98d35eab6828717ce6ab
Detections:
win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/8a4afe95-7f7d-4404-88f2-77961ad2c733/
Parent samples :
95fe28b982a0f8b27443b7a748ab8de9a031d1d8fbcabd369471fb14f229ac5d
4cb13a9651556cd4a30b801326b2170dda7a7e0be186449317e3680adafd1bbc
64826dad12787e9f9989046e0b0d1f58704e52968dbb12de2fcc948dbf2bf2d0
3a819761112c8338848165619bd06586a043f121647bd9be44a4ef8a4d3c91f4
96ce8898787ca1593c5e5c1e4cb0c6ac884631d49f88b98fc20b958e221bf9f2
30ef142c1d8c28c6e01c36ef3ff7eb2b4f6b45e461190764db1c79ea84c3c301
192f9ae242724ee71e3991aa04428426ba989e679fc99b0b6ba79860c6c90c6d
Please note that we are no longer able to provide a coverage score for Virus Total.

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: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: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: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)

File information

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

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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