MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 0645b63aa8957b452b02e4c84471cb41fed65b8d36d01aa097a1414885a6e949. 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: 13


Intelligence 13 IOCs YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 0645b63aa8957b452b02e4c84471cb41fed65b8d36d01aa097a1414885a6e949
SHA3-384 hash: 3706946a3df33a82c7c62c3ea1cd15f949834f8c3b5475d42bc3bc730115dcf0b4f40de5eb3bcadf95fa7f8fa3f6443a
SHA1 hash: 315e26b9f045d16eafbf23c40d41268bade07616
MD5 hash: f34708386c2194cab035acec8dbb3182
humanhash: social-robert-ohio-romeo
File name:rREVISEDPO-AES_AUSNo_0008.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'196'544 bytes
First seen:2025-05-08 13:00:13 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash afcdf79be1557326c854b6e20cb900a7 (1'102 x FormBook, 936 x AgentTesla, 399 x RemcosRAT)
ssdeep 24576:Zu6J33O0c+JY5UZ+XC0kGso6FazintftbjdgmFLUA2Q4WY:bu0c++OCvkGs9Faz81jn1Y
Threatray 1'053 similar samples on MalwareBazaar
TLSH T1C645CF2273DDC361CB669173BF6AB7056EBF3C214630B85B2F980D7DA950162122D7A3
TrID 32.2% (.EXE) Win64 Executable (generic) (10522/11/4)
20.1% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
15.4% (.EXE) Win16 NE executable (generic) (5038/12/1)
13.7% (.EXE) Win32 Executable (generic) (4504/4/1)
6.2% (.EXE) OS/2 Executable (generic) (2029/13)
Magika pebin
dhash icon aae2f3e38383b629 (2'034 x Formbook, 1'183 x CredentialFlusher, 666 x AgentTesla)
Reporter FXOLabs
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
536
Origin country :
BR BR
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
rREVISEDPO-AES_AUSNo_0008.exe
Verdict:
No threats detected
Analysis date:
2025-05-08 13:10:13 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/7a522d8f-f1c3-4f4d-9cc2-432bf58447ba

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.BehavesLike.Win32.Generic.vh.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=681cab916c95617a27b60d71
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-debug autoit compiled-script cscript evasive fingerprint fingerprint hacktool keylogger lolbin microsoft_visual_cc netsh packed packed packer_detected regsvr32
Link:
https://www.filescan.io/uploads/681caae1d95f3e34e964166a/reports/b65d1d5d-c0b7-4bc8-8975-ca170d605d4d/overview
Verdict:
Malicious
Labled as:
AIT:Trojan.Nymeria
Link:
https://www.hybrid-analysis.com/sample/0645b63aa8957b452b02e4c84471cb41fed65b8d36d01aa097a1414885a6e949
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/dc0288fb-0bd5-4b6c-957a-d31545ae303e
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1684400
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
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
Suricata IDS alerts for network traffic
Switches to a custom stack to bypass stack traces
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
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: 1684400 Sample: rREVISEDPO-AES_AUSNo_0008.exe Startdate: 08/05/2025 Architecture: WINDOWS Score: 100 31 www.propriis.xyz 2->31 33 www.earnpet.xyz 2->33 35 14 other IPs or domains 2->35 39 Suricata IDS alerts for network traffic 2->39 41 Antivirus detection for URL or domain 2->41 43 Multi AV Scanner detection for submitted file 2->43 47 3 other signatures 2->47 10 rREVISEDPO-AES_AUSNo_0008.exe 2 2->10         started        signatures3 45 Performs DNS queries to domains with low reputation 33->45 process4 signatures5 57 Binary is likely a compiled AutoIt script file 10->57 59 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 10->59 61 Writes to foreign memory regions 10->61 63 2 other signatures 10->63 13 svchost.exe 10->13         started        process6 signatures7 65 Maps a DLL or memory area into another process 13->65 16 LbRj8nQHOCjgTm7h.exe 13->16 injected process8 dnsIp9 25 www.worrr41.autos 168.76.121.210, 49753, 49754, 49755 ULTRANETSERVICOSEMINTERNETLTDABR South Africa 16->25 27 www.jellbit.site 162.0.225.218, 49745, 49746, 49747 NAMECHEAP-NETUS Canada 16->27 29 8 other IPs or domains 16->29 37 Found direct / indirect Syscall (likely to bypass EDR) 16->37 20 ieUnatt.exe 13 16->20         started        signatures10 process11 signatures12 49 Tries to steal Mail credentials (via file / registry access) 20->49 51 Tries to harvest and steal browser information (history, passwords, etc) 20->51 53 Modifies the context of a thread in another process (thread injection) 20->53 55 2 other signatures 20->55 23 firefox.exe 20->23         started        process13
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/0645b63aa8957b452b02e4c84471cb41fed65b8d36d01aa097a1414885a6e949/
Threat name:
Win32.Trojan.AutoitInject
Create hunting rule
Status:
Malicious
First seen:
2025-05-08 11:30:29 UTC
File Type:
PE (Exe)
Extracted files:
23
AV detection:
23 of 37 (62.16%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=azc3movisv5ukkyc4teei4olih7nmw4ng3ibviexufaurbng5feq._file
Verdict:
malicious
Label(s):
unc_loader_036
Create hunting rule
Similar samples:
4c568ae67871a4cf93a1ebc14d2e9c66e717429859a721a93a596cc9c781fe96
Formbook
5cb84af56a24dbe7fb79678b206f3d9b6721cd7291d6294b1d5e189a1db865eb
Formbook
60c1ab67381887ed5a00e5b6b7e73563985f7a24aee8442713eb28442f9f1eb3
Formbook
68eeebf088677c025da067485a8448bfa38f4b13c61e5e2c2ed717701df74222
Formbook
a94633c29f9278431d729e7a042eae4e4bf59ae36d553db13d4c449fe33a45db
Formbook
c892f300b3deba96f8b67f0bb802db58c8c0828011dc16bdead5ae6f8d7285fe
Formbook
e0f03e33a0191256879d53e567cccbe6344f029ec2f42edee8405b9ba826c8aa
Formbook
+ 1'043 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  5/10
Tags:
discovery
Link:
https://tria.ge/reports/250508-p8rpjstm13/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
Program crash
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Verdict:
Suspicious
Tags:
trojan
YARA:
SUSP_Imphash_Mar23_3
Link:
https://app.threat.zone/submission/ac9e182c-739c-4f8a-8400-6902e80a5228
Unpacked files
SH256 hash:
0645b63aa8957b452b02e4c84471cb41fed65b8d36d01aa097a1414885a6e949
MD5 hash:
f34708386c2194cab035acec8dbb3182
SHA1 hash:
315e26b9f045d16eafbf23c40d41268bade07616
Link:
https://www.unpac.me/results/63e32807-ea31-4853-9795-29209879d6c7/
SH256 hash:
22b6d8f6b09bcf72189389b64175f70bca1924e91826a99df69d85c73b526e06
MD5 hash:
d7324a4dd74edb815d79e2e922aa2fa8
SHA1 hash:
e3a7875b6fdce4d3de211b900cd310dec7baa5e7
Link:
https://www.unpac.me/results/63e32807-ea31-4853-9795-29209879d6c7/
SH256 hash:
6abf291f17b9927f6098d744692d4ae96d742765b6a9614844b4527335ed826c
MD5 hash:
9219351eedcbc449622b96eed6ba4016
SHA1 hash:
194955e4e1813cc1f3b7e0f0797570fbba4d6783
Detections:
win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/63e32807-ea31-4853-9795-29209879d6c7/
Parent samples :
a94633c29f9278431d729e7a042eae4e4bf59ae36d553db13d4c449fe33a45db
c892f300b3deba96f8b67f0bb802db58c8c0828011dc16bdead5ae6f8d7285fe
8ddcd9773b5c9cec6e3d0e4d996038faa74cbe9a971665cf596d8786de25ac01
60c1ab67381887ed5a00e5b6b7e73563985f7a24aee8442713eb28442f9f1eb3
0645b63aa8957b452b02e4c84471cb41fed65b8d36d01aa097a1414885a6e949
6456629099934814560441e96bc302045cdfe87798caf1227ac028990efd1c49
a5fdeddda201a56e42451f2a8ddad6ec11449af0c43895e57a186f99b03904ca
eed9a19a853515be2773e52c0cdd58708f7e6fd5f65df8c0f8c81ea292fc5c4d
d74e403ce82ed74129c625e6808a9bcf3bccbf271f17557341850a4e68c72ecc
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/0645b63aa895/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/0645b63aa8957b452b02e4c84471cb41fed65b8d36d01aa097a1414885a6e949

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:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:pe_no_import_table
Create hunting rule
Description:Detect pe file that no import table
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.

Malspam

Formbook

Executable exe 0645b63aa8957b452b02e4c84471cb41fed65b8d36d01aa097a1414885a6e949

(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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