MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 fb171513b327007051a9d8f18b06c92bbf33577034060dc0a725a57eba5c03a0. 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: 18


Intelligence 18 IOCs YARA 15 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: fb171513b327007051a9d8f18b06c92bbf33577034060dc0a725a57eba5c03a0
SHA3-384 hash: 05d64e87120b22dd203f2e94b21eebf6300d0fc5806d3248a1a687e708138b576ca956fb9e087edee42a68c8a9a60efa
SHA1 hash: e10429663df1a28d3e5f6e22de2b170b5abafa63
MD5 hash: 69e8dccc57322fc946b3cbed9b468ae9
humanhash: autumn-sad-glucose-burger
File name:CUnVQq4stCjgJHR.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:797'696 bytes
First seen:2025-03-17 17:55:50 UTC
Last seen:2025-03-24 14:49:14 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'611 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 12288:f9OmyVxRp8q24J9fdJgP6VFu0tsx1P2vPe/ovCd/ynQk7+:l8n8bsfdLPu0015/ovCd/ynx7
Threatray 2'524 similar samples on MalwareBazaar
TLSH T19F05E01DBE62AB65C2185FB7C853104941E38463C273F35B1EDA1CD24E79B98C69FA83
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10522/11/4)
6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.3% (.EXE) Win32 Executable (generic) (4504/4/1)
2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Magika pebin
Reporter cocaman
Tags:exe FormBook payment

Intelligence

File Origin
# of uploads :
2
# of downloads :
452
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
CUnVQq4stCjgJHR.exe
Verdict:
Malicious activity
Analysis date:
2025-03-17 18:01:44 UTC
Tags:
autorun-sched formbook stealer xloader
Link:
https://app.any.run/tasks/e8ac3bf2-7c92-4757-8fc2-c74a66851bb9

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=67d864bf3962f1a6f4726314
Tags:
micro shell spawn
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Сreating synchronization primitives
Creating a process with a hidden window
Creating a file in the %AppData% directory
Enabling the 'hidden' option for recently created files
Adding an access-denied ACE
Creating a file in the %temp% directory
Launching a process
Creating a file
Launching cmd.exe command interpreter
Setting browser functions hooks
Adding an exclusion to Microsoft Defender
Enabling autorun by creating a file
Unauthorized injection to a system process
Unauthorized injection to a browser process
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated obfuscated packed packed packer_detected
Link:
https://www.filescan.io/uploads/67d8623cd2c4beeae926e7b2/reports/b26a99aa-baba-40bf-9795-29428498afda/overview
Verdict:
Malicious
Labled as:
HackTool[Obfuscator]/MSIL.DeepSea
Link:
https://www.hybrid-analysis.com/sample/fb171513b327007051a9d8f18b06c92bbf33577034060dc0a725a57eba5c03a0
Result
Verdict:
UNKNOWN
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/5f1fe407-097d-48ff-86e5-4372ed45ede6
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1640815
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Adds a directory exclusion to Windows Defender
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Found direct / indirect Syscall (likely to bypass EDR)
Found malware configuration
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
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 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)
Sample uses process hollowing technique
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: Scheduled temp file as task from temp location
Switches to a custom stack to bypass stack traces
Tries to detect virtualization through RDTSC time measurements
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1640815 Sample: CUnVQq4stCjgJHR.exe Startdate: 17/03/2025 Architecture: WINDOWS Score: 100 67 www.usk360.xyz 2->67 69 www.oneyiq.xyz 2->69 71 9 other IPs or domains 2->71 83 Found malware configuration 2->83 85 Malicious sample detected (through community Yara rule) 2->85 87 Antivirus detection for URL or domain 2->87 91 10 other signatures 2->91 11 CUnVQq4stCjgJHR.exe 7 2->11         started        15 bAwSpleOY.exe 5 2->15         started        17 svchost.exe 2->17         started        signatures3 89 Performs DNS queries to domains with low reputation 69->89 process4 dnsIp5 57 C:\Users\user\AppData\Roaming\bAwSpleOY.exe, PE32 11->57 dropped 59 C:\Users\...\bAwSpleOY.exe:Zone.Identifier, ASCII 11->59 dropped 61 C:\Users\user\AppData\Local\...\tmp2C37.tmp, XML 11->61 dropped 63 C:\Users\user\...\CUnVQq4stCjgJHR.exe.log, ASCII 11->63 dropped 105 Uses schtasks.exe or at.exe to add and modify task schedules 11->105 107 Writes to foreign memory regions 11->107 109 Allocates memory in foreign processes 11->109 111 Adds a directory exclusion to Windows Defender 11->111 20 RegSvcs.exe 11->20         started        23 powershell.exe 23 11->23         started        25 powershell.exe 23 11->25         started        27 schtasks.exe 1 11->27         started        113 Antivirus detection for dropped file 15->113 115 Multi AV Scanner detection for dropped file 15->115 117 Injects a PE file into a foreign processes 15->117 29 RegSvcs.exe 15->29         started        31 schtasks.exe 15->31         started        33 RegSvcs.exe 15->33         started        65 127.0.0.1 unknown unknown 17->65 file6 signatures7 process8 signatures9 93 Modifies the context of a thread in another process (thread injection) 20->93 95 Maps a DLL or memory area into another process 20->95 97 Sample uses process hollowing technique 20->97 103 2 other signatures 20->103 35 explorer.exe 68 1 20->35 injected 99 Loading BitLocker PowerShell Module 23->99 38 WmiPrvSE.exe 23->38         started        40 conhost.exe 23->40         started        42 conhost.exe 25->42         started        44 conhost.exe 27->44         started        101 Found direct / indirect Syscall (likely to bypass EDR) 29->101 46 conhost.exe 31->46         started        process10 dnsIp11 73 204.79.197.203, 443 MICROSOFT-CORP-MSN-AS-BLOCKUS United States 35->73 48 chkdsk.exe 35->48         started        51 WWAHost.exe 35->51         started        process12 signatures13 75 Modifies the context of a thread in another process (thread injection) 48->75 77 Maps a DLL or memory area into another process 48->77 79 Tries to detect virtualization through RDTSC time measurements 48->79 81 Switches to a custom stack to bypass stack traces 48->81 53 cmd.exe 48->53         started        process14 process15 55 conhost.exe 53->55         started       
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/fb171513b327007051a9d8f18b06c92bbf33577034060dc0a725a57eba5c03a0
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/fb171513b327007051a9d8f18b06c92bbf33577034060dc0a725a57eba5c03a0/
Threat name:
Win32.Trojan.Swotter
Create hunting rule
Status:
Malicious
First seen:
2025-03-17 17:55:55 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
15 of 24 (62.50%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=7mlrke5te4ahaunj3dyywbwjfo7tgv3qgqda3qfhewsx5os4aoqa._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
unc_loader_037
Create hunting rule
Similar samples:
1a5d14c701d5d786f3940993cb3be259d29dae73e5af588d2acf439b40facd0e
Formbook
3f616f7935f4c97239699196e64056b45be53e73d02a0b70e482c886e3a13965
Formbook
6f8e85f3704f0179d0854b1c278784441b0e555f6cbbd7af19a677afaefef004
Formbook
b603a586ea389d7ce6ea8b3ae24eb08bbe6c020e341ee32845c6edf868aa9bbd
Formbook
d0387872c43a63fc0a157c84edc3a99abde2af204ba4f25969209ce38d7ed15f
Formbook
d8c0f4739b6a46ee8c46a6af4622158b9a866b6eabd1dd6a88228856520b714d
Formbook
error
Formbook
f2d754008958e2c90dbac5f60958e0add5403563e51f5414599d35f88cd0db2b
Formbook
f38a008406f2bca311aa8014976f27669d52d494286f3dbc1dd10259f8382324
Formbook
f9f4df8b0dec45180e507d5fb6fdfd852823cbbad16cd662950d0b748a6baff0
Formbook
fb171513b327007051a9d8f18b06c92bbf33577034060dc0a725a57eba5c03a0
Formbook
+ 2'514 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:my18 discovery execution rat spyware stealer trojan
Link:
https://tria.ge/reports/250317-wh19mawsfx/
Behaviour
Scheduled Task/Job: Scheduled Task
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Checks computer location settings
Command and Scripting Interpreter: PowerShell
Formbook payload
Formbook
Formbook family
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/f0489f9c-f94c-47ec-98f6-41466ffb2f51
Unpacked files
SH256 hash:
fb171513b327007051a9d8f18b06c92bbf33577034060dc0a725a57eba5c03a0
MD5 hash:
69e8dccc57322fc946b3cbed9b468ae9
SHA1 hash:
e10429663df1a28d3e5f6e22de2b170b5abafa63
Link:
https://www.unpac.me/results/5a144e36-4965-499e-b09f-4280f6772942/
SH256 hash:
384fc7ff64d89f30cca3d71e2ca8ec78c7ddfd07f47f104a4ef1510416516912
MD5 hash:
5988649c8fee59b89705208066d36803
SHA1 hash:
33373deac496bc4cb50abbd6b9f3dd50b857949c
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
Create hunting rule
SUSP_OBF_NET_Reactor_Indicators_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/5a144e36-4965-499e-b09f-4280f6772942/
SH256 hash:
51ea9157b7cae4cdee16d6007e949dfdf833de7715f4b0bfbdd91b9cd1b5a82a
MD5 hash:
87b522966f156f38d9ff9fb09fe89ce2
SHA1 hash:
e0cf3a26b03e8affa99961cf95e9d5342cc5f98c
Detections:
INDICATOR_EXE_Packed_SmartAssembly
Create hunting rule
Link:
https://www.unpac.me/results/5a144e36-4965-499e-b09f-4280f6772942/
Parent samples :
d8c0f4739b6a46ee8c46a6af4622158b9a866b6eabd1dd6a88228856520b714d
05af5a6bdfe6f518c6c7fdef1694e3afb477963be7770a13936a2a93c3de5dcb
1a5d14c701d5d786f3940993cb3be259d29dae73e5af588d2acf439b40facd0e
a7baa685836623594b54a531ad460907c2302974f1f39377501a6eafb1cefc98
fb171513b327007051a9d8f18b06c92bbf33577034060dc0a725a57eba5c03a0
b90b6f766b3e75cbd0cb02ac6f732e81071d3d2409b101d7986878458de2f9c5
6974edb07b5978530b50fa313bcc24717521231ddb6d284c6a43016eca62def0
a641f727fa4566ec19a3a04edcbe7e177aad8fb5f2381907e6c38adfa01f8a7a
2e0c4371996fd665e0845f95679dc888e64bbb4fb8074c98710c107113df8d2e
6664c3557391a898683d1733a38718e110e5a4b51d855fba21c14caa40788db4
16bd0dcc57418cd1689dc890eca5e224eba7ab58c42920ba8209489a5dd35fe4
95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb
SH256 hash:
12758ec96b1f25fb5e300c9ae98569c3c5b569baa723139ccacc475ab371301c
MD5 hash:
ef9ef67d5a832bfb7cff9fb441ff9a1b
SHA1 hash:
9013556c4afddcc2dfd23997350c0d74aae285fa
Detections:
win_formbook_w0
Create hunting rule
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
FormBook
Create hunting rule
Windows_Trojan_Formbook
Create hunting rule
Formbook
Create hunting rule
Link:
https://www.unpac.me/results/5a144e36-4965-499e-b09f-4280f6772942/
Parent samples :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 family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/fb171513b327/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/fb171513b327007051a9d8f18b06c92bbf33577034060dc0a725a57eba5c03a0

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: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: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:NET
Create hunting rule
Author:malware-lu
Rule name:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
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:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
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

zip e6982cec738cc7a71dfb04bd508752e500afd0ae433a17c5fc4497fde20edee9

Formbook

Executable exe fb171513b327007051a9d8f18b06c92bbf33577034060dc0a725a57eba5c03a0

(this sample)

  
Delivery method
Other
  
Dropped by
SHA256 e6982cec738cc7a71dfb04bd508752e500afd0ae433a17c5fc4497fde20edee9
  
Dropped by
MD5 72113f35fc39716fbb3a57469711de75

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

Comments