MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b263cffd4ddc9c3a3d69389688f8b2c0304c07369532c636a9bba34a0edd7d67. 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: 16


Intelligence 16 IOCs YARA 8 File information Comments
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SHA256 hash: b263cffd4ddc9c3a3d69389688f8b2c0304c07369532c636a9bba34a0edd7d67
SHA3-384 hash: 47e376dd0a4d784230ae64c6c23840c61ca6d7a552e7d39f7a06d06aab69961590788763400b4c2739c36e5409d07429
SHA1 hash: 271d9ac2ed6beb5c966453422a4cb28fa1e7b006
MD5 hash: 4d1c57f0a67b90cbee3bf819adbfa6f7
humanhash: steak-wisconsin-bravo-delta
File name:rVertragsdokument.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'345'536 bytes
First seen:2025-03-20 09:30:12 UTC
Last seen:2025-03-24 08:45:15 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash afcdf79be1557326c854b6e20cb900a7 (1'102 x FormBook, 936 x AgentTesla, 399 x RemcosRAT)
ssdeep 24576:pu6J33O0c+JY5UZ+XC0kGso6Fa6+Fjr9Qs2wdYOhELfFkOVdWY:Lu0c++OCvkGs9Fa6+tr9vhELfXqY
Threatray 676 similar samples on MalwareBazaar
TLSH T16E55AE52A7CE82ECC6654033FA15B3412EEBB8644530B45A3F8C0D6DDBA1DE151AC6FB
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 30e8e8f0f0e8f030 (1 x Formbook)
Reporter FXOLabs
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
3
# of downloads :
479
Origin country :
BR BR
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
nVertragsdokument_PDF.uue
Verdict:
Malicious activity
Analysis date:
2025-03-20 10:21:49 UTC
Tags:
arch-exec
Link:
https://app.any.run/tasks/af675306-f731-4d46-8184-e1508ad2e2c1

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:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67dbe03b115e7b48b48f1045
Tags:
autorun autoit emotet
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Creating a file in the %temp% directory
Creating a file
Creating a process from a recently created file
Launching a process
Сreating synchronization primitives
Enabling autorun by creating a file
Unauthorized injection to a system process
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
adaptive-context autoit cmdkey compiled-script fingerprint keylogger lolbin microsoft_visual_cc msiexec packed
Link:
https://www.filescan.io/uploads/67dbe0481dd35ee4a0e93d90/reports/7f2b6f5a-0d98-4b40-8406-459047d8eb0c/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_90%
Link:
https://www.hybrid-analysis.com/sample/b263cffd4ddc9c3a3d69389688f8b2c0304c07369532c636a9bba34a0edd7d67
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/f4cc982d-17f6-4654-8b63-bacd7773a2d6
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1644054
Signature
Antivirus detection for URL or domain
Binary is likely a compiled AutoIt script file
Drops VBS files to the startup folder
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 dropped file
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sigma detected: Drops script at startup location
Sigma detected: WScript or CScript Dropper
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)
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1644054 Sample: rVertragsdokument.exe Startdate: 20/03/2025 Architecture: WINDOWS Score: 100 48 www.theamsterdamtouch.xyz 2->48 50 www.leosnybagel.xyz 2->50 52 17 other IPs or domains 2->52 80 Suricata IDS alerts for network traffic 2->80 82 Antivirus detection for URL or domain 2->82 84 Multi AV Scanner detection for submitted file 2->84 88 5 other signatures 2->88 11 rVertragsdokument.exe 4 2->11         started        15 wscript.exe 1 2->15         started        signatures3 86 Performs DNS queries to domains with low reputation 50->86 process4 file5 46 C:\Users\user\AppData\...\renownedness.exe, PE32 11->46 dropped 94 Binary is likely a compiled AutoIt script file 11->94 17 renownedness.exe 2 11->17         started        96 Windows Scripting host queries suspicious COM object (likely to drop second stage) 15->96 21 renownedness.exe 1 15->21         started        signatures6 process7 file8 44 C:\Users\user\AppData\...\renownedness.vbs, data 17->44 dropped 68 Multi AV Scanner detection for dropped file 17->68 70 Binary is likely a compiled AutoIt script file 17->70 72 Drops VBS files to the startup folder 17->72 74 Switches to a custom stack to bypass stack traces 17->74 23 svchost.exe 17->23         started        76 Writes to foreign memory regions 21->76 78 Maps a DLL or memory area into another process 21->78 26 svchost.exe 21->26         started        signatures9 process10 signatures11 90 Maps a DLL or memory area into another process 23->90 28 n1u7AhQuY3zyl.exe 23->28 injected 30 n1u7AhQuY3zyl.exe 26->30 injected process12 signatures13 33 w32tm.exe 13 28->33         started        98 Maps a DLL or memory area into another process 30->98 100 Found direct / indirect Syscall (likely to bypass EDR) 30->100 36 w32tm.exe 30->36         started        process14 signatures15 60 Tries to steal Mail credentials (via file / registry access) 33->60 62 Tries to harvest and steal browser information (history, passwords, etc) 33->62 64 Modifies the context of a thread in another process (thread injection) 33->64 66 3 other signatures 33->66 38 n1u7AhQuY3zyl.exe 33->38 injected 42 firefox.exe 33->42         started        process16 dnsIp17 54 www.vibeam.live 162.254.32.77, 49763, 49764, 49765 VIVIDHOSTINGUS United States 38->54 56 theamsterdamtouch.xyz 84.32.84.32, 49735, 49736, 49737 NTT-LT-ASLT Lithuania 38->56 58 10 other IPs or domains 38->58 92 Found direct / indirect Syscall (likely to bypass EDR) 38->92 signatures18
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b263cffd4ddc9c3a3d69389688f8b2c0304c07369532c636a9bba34a0edd7d67
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b263cffd4ddc9c3a3d69389688f8b2c0304c07369532c636a9bba34a0edd7d67/
Threat name:
Win32.Trojan.AutoitInject
Create hunting rule
Status:
Malicious
First seen:
2025-03-20 09:30:33 UTC
File Type:
PE (Exe)
Extracted files:
28
AV detection:
20 of 24 (83.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wjr477kn3sodupljhclir6fsyayeybzwsuzmmnvjxoruudw5pvtq._file
Verdict:
malicious
Label(s):
unc_loader_036
Create hunting rule
Similar samples:
2e911f1f12cdbe9e6da0d0c0c7906ccbdd669751c98a75e556890b2a0e5b0af5
Formbook
5942293d4ed06c7427d43524f4226be05ead22d7cb55ec2373fcb482fab62c4b
Formbook
5eb39af58bc99962a6439d873bda78086903301b0476ef79daf3802220fdf382
Formbook
6138f369226eda1479b0df8e284d77b329ba2a14e3fcb9648dc53892c5ab2505
Formbook
68eeebf088677c025da067485a8448bfa38f4b13c61e5e2c2ed717701df74222
Formbook
6b5bfda5580a6bd8ec3062f4d33b09c0f91722d824e80ae0cb8d47e8b1b2fcb7
Formbook
9504393cf0679893bff43bd2c1bd463b3dcdbb00f76803b9a58d948b69f09989
Formbook
a0e3867d9927b3378d1547299bf162f0a461cedbba203b44f1ec45b5c242c539
Formbook
ce0b9b24b5c1d33c48d8eb08ff59cc8b7d529a1366219f60ae80c1eafb3801ad
Formbook
error
Formbook
+ 666 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  7/10
Tags:
discovery
Link:
https://tria.ge/reports/250320-lgrcxszsbv/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
AutoIT Executable
Suspicious use of SetThreadContext
Drops startup file
Executes dropped EXE
Loads dropped DLL
Verdict:
Malicious
Tags:
trojan
YARA:
SUSP_Imphash_Mar23_3
Link:
https://app.threat.zone/submission/de280c88-ca64-45e1-944d-eea4b4301cb4
Unpacked files
SH256 hash:
b263cffd4ddc9c3a3d69389688f8b2c0304c07369532c636a9bba34a0edd7d67
MD5 hash:
4d1c57f0a67b90cbee3bf819adbfa6f7
SHA1 hash:
271d9ac2ed6beb5c966453422a4cb28fa1e7b006
Link:
https://www.unpac.me/results/b2558098-9328-47be-b84a-43b785c9419f/
SH256 hash:
5b06579febb4b5a93fcec098cf1939274a54d8d4e8ae3165b108216d91e5b845
MD5 hash:
65c89ef371f2ecb32622f3fb92bc8052
SHA1 hash:
5cf2a9983a266049bb6cf99b9b6a6dea24077714
Link:
https://www.unpac.me/results/b2558098-9328-47be-b84a-43b785c9419f/
SH256 hash:
83e12d4eca8e832771364abca045f2065dd9be5000106f9c9e9028e4365a8aa7
MD5 hash:
58be8fbc94181aea4d3e622d8b43e5a2
SHA1 hash:
6b2a58075f152623fe50c6f72618af86b890f07c
Link:
https://www.unpac.me/results/b2558098-9328-47be-b84a-43b785c9419f/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b263cffd4ddc/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Formbook
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/b263cffd4ddc9c3a3d69389688f8b2c0304c07369532c636a9bba34a0edd7d67

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)
Rule name:testing_win_formbook_autoit
Create hunting rule
Author:dubfib

File information

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

Malspam

Formbook

Executable exe b263cffd4ddc9c3a3d69389688f8b2c0304c07369532c636a9bba34a0edd7d67

(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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