MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b51868a125a577733f6208c4f11c8887aca278b339abe7f62fe2a4808a8399aa. 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: 17


Intelligence 17 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b51868a125a577733f6208c4f11c8887aca278b339abe7f62fe2a4808a8399aa
SHA3-384 hash: 29b2c6595b53fb73ab18a78717a2119a48832e11accf9be97af6c9b5fd984edb38e6dc68e885ea9a5204e81acb4bd531
SHA1 hash: 6c4cb64149877ba432bc394898981386829c7304
MD5 hash: dbb4686baadb06dcf02b36ba0196064c
humanhash: timing-kitten-fish-stairway
File name:hwW5c0Cf0VlkCcN.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:778'752 bytes
First seen:2025-02-26 19:40:54 UTC
Last seen:2025-03-10 12:14:25 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 12288:HSg7W7X98EmfHsIFCdLVYsf1nqjc7tLWmhsV8cLgw03BELQliyF/W:ygSZ8EqHdELVYsf+c5XspPsxu
Threatray 4'730 similar samples on MalwareBazaar
TLSH T171F4F1582718CA17C19E4779C6E2E1B457FD8E8B7542F346AAD97EEF709AF2009020D3
TrID 69.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.0% (.EXE) Win64 Executable (generic) (10522/11/4)
6.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.2% (.EXE) Win32 Executable (generic) (4504/4/1)
1.9% (.EXE) Win16/32 Executable Delphi generic (2072/23)
Magika pebin
dhash icon b0b268e8ccd486a2 (11 x Formbook, 5 x SnakeKeylogger, 3 x MassLogger)
Reporter cocaman
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
4
# of downloads :
443
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
a32f8e6ab74ec0118838b1ec74cd16ddb279965c70c65fbcd587f2244cd67140
Verdict:
Malicious activity
Analysis date:
2025-02-26 19:06:09 UTC
Tags:
arch-exec
Link:
https://app.any.run/tasks/9455ff59-a0cf-4708-a627-1cb4c1bbf896

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Win32.MalwareX-gen.31902.3615.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67bf662028ab76d43a5d81ae
Tags:
stration shell spawn
Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Connection attempt
Searching for synchronization primitives
Creating a window
Launching a service
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 vbnet
Link:
https://www.filescan.io/uploads/67bf6e614a3011c802c24f30/reports/004773fc-0572-4a37-b00a-6b5ff6d350e3/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/b51868a125a577733f6208c4f11c8887aca278b339abe7f62fe2a4808a8399aa
Result
Verdict:
SUSPICIOUS
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/0df55019-d543-4ef1-b373-5a5931a423a2
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1625148
Signature
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
Allocates memory in foreign processes
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: Rundll32 Execution Without CommandLine Parameters
Sigma detected: Scheduled temp file as task from temp location
Suricata IDS alerts for network traffic
Tries to detect virtualization through RDTSC time measurements
Uses netstat to query active network connections and open ports
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: 1625148 Sample: hwW5c0Cf0VlkCcN.exe Startdate: 26/02/2025 Architecture: WINDOWS Score: 100 60 www.ealturmat.xyz 2->60 62 www.ahooodi.xyz 2->62 64 11 other IPs or domains 2->64 78 Suricata IDS alerts for network traffic 2->78 80 Found malware configuration 2->80 82 Malicious sample detected (through community Yara rule) 2->82 86 10 other signatures 2->86 11 hwW5c0Cf0VlkCcN.exe 11 7 2->11         started        15 IlulHZkSfQZ.exe 2->15         started        signatures3 84 Performs DNS queries to domains with low reputation 62->84 process4 file5 52 C:\Users\user\AppData\...\IlulHZkSfQZ.exe, PE32 11->52 dropped 54 C:\Users\...\IlulHZkSfQZ.exe:Zone.Identifier, ASCII 11->54 dropped 56 C:\Users\user\AppData\Local\...\tmp7EA8.tmp, XML 11->56 dropped 58 C:\Users\user\...\hwW5c0Cf0VlkCcN.exe.log, ASCII 11->58 dropped 94 Uses schtasks.exe or at.exe to add and modify task schedules 11->94 96 Writes to foreign memory regions 11->96 98 Allocates memory in foreign processes 11->98 100 Adds a directory exclusion to Windows Defender 11->100 17 RegSvcs.exe 11->17         started        20 powershell.exe 23 11->20         started        22 powershell.exe 23 11->22         started        24 schtasks.exe 1 11->24         started        102 Multi AV Scanner detection for dropped file 15->102 104 Injects a PE file into a foreign processes 15->104 26 RegSvcs.exe 15->26         started        28 schtasks.exe 15->28         started        signatures6 process7 signatures8 66 Modifies the context of a thread in another process (thread injection) 17->66 68 Maps a DLL or memory area into another process 17->68 70 Sample uses process hollowing technique 17->70 76 2 other signatures 17->76 30 explorer.exe 17->30 injected 72 Loading BitLocker PowerShell Module 20->72 33 conhost.exe 20->33         started        35 WmiPrvSE.exe 20->35         started        37 conhost.exe 22->37         started        39 conhost.exe 24->39         started        74 Found direct / indirect Syscall (likely to bypass EDR) 26->74 41 conhost.exe 28->41         started        process9 signatures10 106 Uses netstat to query active network connections and open ports 30->106 43 rundll32.exe 30->43         started        46 NETSTAT.EXE 30->46         started        process11 signatures12 88 Modifies the context of a thread in another process (thread injection) 43->88 90 Maps a DLL or memory area into another process 43->90 92 Tries to detect virtualization through RDTSC time measurements 43->92 48 cmd.exe 43->48         started        process13 process14 50 conhost.exe 48->50         started       
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b51868a125a577733f6208c4f11c8887aca278b339abe7f62fe2a4808a8399aa
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b51868a125a577733f6208c4f11c8887aca278b339abe7f62fe2a4808a8399aa/
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wumgrijfuv3xgp3cbdcpcheiq6wke6fthgv6p5rp4ksibcudtgva._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
unknown_loader_037
Create hunting rule
Similar samples:
36e9bfc5337aa8a4dd2c8c24087a3cdc3f589df01ec12c0d81a28eb62b67b9e4
Formbook
6f706398207b1fd3a00de5f859dc840cf8e100175fdabe260ebb96db5980f03c
Formbook
93aeb18c52bece32042f39cbce6994036ac8556043fdc335bb3fc1453ce8d74f
Formbook
a2780a43ac1e90a6945c78cbcbd929863ab89c72ff1f86380f48303d051bc7d4
Formbook
b51868a125a577733f6208c4f11c8887aca278b339abe7f62fe2a4808a8399aa
Formbook
df5d6ebc3b4ec456ec22620759160aaed495836114a4b5abd38845439f67b46d
Formbook
error
Formbook
+ 4'720 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/250226-yd7xqa1ky5/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Scheduled Task/Job: Scheduled Task
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of UnmapMainImage
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/2d45f5db-cff9-45d5-88ce-75b70df55acb
Unpacked files
SH256 hash:
b51868a125a577733f6208c4f11c8887aca278b339abe7f62fe2a4808a8399aa
MD5 hash:
dbb4686baadb06dcf02b36ba0196064c
SHA1 hash:
6c4cb64149877ba432bc394898981386829c7304
Link:
https://www.unpac.me/results/b48c36dc-3959-4b91-a318-3d9fee276a67/
SH256 hash:
0dbecea865a318ae95404086118dab10fe0dc8bbd5fc83e84614ba385f240140
MD5 hash:
1bf46d859c315598cfe9b912b241faa8
SHA1 hash:
43f17c550be2c5b1977c3be313d12a37094f44b6
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/b48c36dc-3959-4b91-a318-3d9fee276a67/
SH256 hash:
4020cd9f017ae7fdff9e7e9d134039ddf767accecb5f75d4ec129b831bf9fe11
MD5 hash:
6ba807815ebfd71477a410f8fa85532b
SHA1 hash:
c077ca1fc4b626fd408113fab8eabbf9509db08d
Link:
https://www.unpac.me/results/b48c36dc-3959-4b91-a318-3d9fee276a67/
SH256 hash:
014af1eeb386d2d55905a3a9e582d070fb7fb04fd6167dfdcf5fe40ef4628035
MD5 hash:
fab7758d7c5b6317d1559d5c06aba0e0
SHA1 hash:
039e53c637bc55803e95e5cb8782120b61f93f0c
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/b48c36dc-3959-4b91-a318-3d9fee276a67/
Parent samples :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 family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b51868a125a5/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/b51868a125a577733f6208c4f11c8887aca278b339abe7f62fe2a4808a8399aa

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:NET
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
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 a32f8e6ab74ec0118838b1ec74cd16ddb279965c70c65fbcd587f2244cd67140

Formbook

Executable exe b51868a125a577733f6208c4f11c8887aca278b339abe7f62fe2a4808a8399aa

(this sample)

  
Delivery method
Other
  
Dropped by
SHA256 a32f8e6ab74ec0118838b1ec74cd16ddb279965c70c65fbcd587f2244cd67140
  
Dropped by
MD5 1e19602d84c5755bab9c760c1aa61099

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 (GUARD_CF)high

Comments