MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c51a6649c394fff8566dd845ed8b2f11b4adfa57486a9d16d645eebedc0605d9. 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 6 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c51a6649c394fff8566dd845ed8b2f11b4adfa57486a9d16d645eebedc0605d9
SHA3-384 hash: be3d2d3a4762a7fb66db4f3645b3f3824c26d940c50827cdbf46d92f6902ff6a40acfefff6cc3ea5ed5a90b8188ca48e
SHA1 hash: 0d5c2fbd348ad21b0ff0b0edfb53b88a9b9f5dcc
MD5 hash: 34d1fa82399358cfc800d7b2a1d3aa13
humanhash: nuts-zebra-butter-sierra
File name:34d1fa82399358cfc800d7b2a1d3aa13
Download: download sample
Signature Formbook
Create hunting rule
File size:729'608 bytes
First seen:2024-05-22 19:07:03 UTC
Last seen:2024-05-22 19:28:55 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'610 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 12288:ZLrBpc/5B2NHSV2nR2R0vOhJYfT8Z6Y5qm2SP9A4ThhVHTjWSutqokR:NXc/r6HV20vOh+7Nm3RthVHfW1w
Threatray 612 similar samples on MalwareBazaar
TLSH T110F4232EF6BC4723DD7ADD7542309242CB71B563EA62D2892CC86CEC2E27348C6D1567
TrID 69.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.0% (.EXE) Win64 Executable (generic) (10523/12/4)
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)
File icon (PE):PE icon
dhash icon 0000000000000000 (872 x AgentTesla, 496 x Formbook, 296 x RedLineStealer)
Reporter zbetcheckin
Tags:32 exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
339
Origin country :
FR FR
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
c51a6649c394fff8566dd845ed8b2f11b4adfa57486a9d16d645eebedc0605d9.exe
Verdict:
Malicious activity
Analysis date:
2024-05-22 20:20:54 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/4b3b2b24-6720-45eb-8aa5-5fdd7f87fc07

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Trojan.PackedNET.2858.25715.19666.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=664e431bda0f32dc8898376bwin7simulatehigh_evasion
Tags:
Banker Encryption Execution Network Static Stealth Dexter
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
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Adding an exclusion to Microsoft Defender
Enabling autorun by creating a file
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
overlay packed
Link:
https://www.filescan.io/uploads/664e4264cc3f31c6c2081708/reports/9a68b78b-cbff-4963-b319-e29c59ad5bcb/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/c51a6649c394fff8566dd845ed8b2f11b4adfa57486a9d16d645eebedc0605d9
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/1be1313b-76a4-4461-a54b-547f3a04705b
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1446041
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Adds a directory exclusion to Windows Defender
AI detected suspicious sample
Found direct / indirect Syscall (likely to bypass EDR)
Injects a PE file into a foreign processes
Loading BitLocker PowerShell Module
Machine Learning detection for dropped file
Machine Learning detection for sample
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)
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: Scheduled temp file as task from temp location
Snort IDS alert for network traffic
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1446041 Sample: sDcscN5fmS.exe Startdate: 22/05/2024 Architecture: WINDOWS Score: 100 55 www.ctlz.xyz 2->55 57 xn--2bin7yap-0kb.com 2->57 59 7 other IPs or domains 2->59 71 Snort IDS alert for network traffic 2->71 73 Malicious sample detected (through community Yara rule) 2->73 75 Sigma detected: Scheduled temp file as task from temp location 2->75 79 8 other signatures 2->79 10 sDcscN5fmS.exe 7 2->10         started        14 NvdvsYVs.exe 5 2->14         started        signatures3 77 Performs DNS queries to domains with low reputation 55->77 process4 file5 51 C:\Users\user\AppData\Roaming51vdvsYVs.exe, PE32 10->51 dropped 53 C:\Users\user\AppData\Local\...\tmp2CEB.tmp, XML 10->53 dropped 89 Uses schtasks.exe or at.exe to add and modify task schedules 10->89 91 Adds a directory exclusion to Windows Defender 10->91 93 Injects a PE file into a foreign processes 10->93 16 sDcscN5fmS.exe 10->16         started        19 powershell.exe 23 10->19         started        21 powershell.exe 23 10->21         started        23 schtasks.exe 1 10->23         started        95 Multi AV Scanner detection for dropped file 14->95 97 Machine Learning detection for dropped file 14->97 25 schtasks.exe 1 14->25         started        27 NvdvsYVs.exe 14->27         started        signatures6 process7 signatures8 67 Maps a DLL or memory area into another process 16->67 29 JtAiGchnMgkEVqLnpnQUAUFB.exe 16->29 injected 69 Loading BitLocker PowerShell Module 19->69 32 WmiPrvSE.exe 19->32         started        34 conhost.exe 19->34         started        36 conhost.exe 21->36         started        38 conhost.exe 23->38         started        40 conhost.exe 25->40         started        process9 signatures10 99 Found direct / indirect Syscall (likely to bypass EDR) 29->99 42 icacls.exe 13 29->42         started        process11 signatures12 81 Tries to steal Mail credentials (via file / registry access) 42->81 83 Tries to harvest and steal browser information (history, passwords, etc) 42->83 85 Modifies the context of a thread in another process (thread injection) 42->85 87 2 other signatures 42->87 45 JtAiGchnMgkEVqLnpnQUAUFB.exe 42->45 injected 49 firefox.exe 42->49         started        process13 dnsIp14 61 www.ctlz.xyz 203.161.43.228, 53856, 53857, 53858 VNPT-AS-VNVNPTCorpVN Malaysia 45->61 63 pls-immigration.com 185.98.131.152, 53843, 80 RMI-FITECHFR France 45->63 65 3 other IPs or domains 45->65 101 Found direct / indirect Syscall (likely to bypass EDR) 45->101 signatures15
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/c51a6649c394fff8566dd845ed8b2f11b4adfa57486a9d16d645eebedc0605d9
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c51a6649c394fff8566dd845ed8b2f11b4adfa57486a9d16d645eebedc0605d9/
Threat name:
ByteCode-MSIL.Trojan.Taskun
Create hunting rule
Status:
Malicious
First seen:
2024-05-22 19:08:38 UTC
File Type:
PE (.Net Exe)
Extracted files:
2
AV detection:
19 of 24 (79.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=yungmsodst77qvtn3bc63czpcg2k36sxjbvj2fwwixxl5xagaxmq._file
Verdict:
malicious
Similar samples:
5228429e6eefc6336ac71c6f0c7c8fbd2770451057a951657e338d1cdd5d6c80
Formbook
83af6b250f20ac16f456087fa3da190876b423cecc42c2f624bb167f932e7d6e
Formbook
af852fa71e4e2979b288920a1144bc6fdeaf4b47747e6a18a457f1242ab8f7cd
Formbook
f6551f6c9a036c132e4faaa300361b024c79f2e0562ace17a042dc0793f1ee31
Formbook
+ 602 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  8/10
Tags:
execution
Link:
https://tria.ge/reports/240522-xs71ladb96/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
Suspicious use of SetThreadContext
Checks computer location settings
Command and Scripting Interpreter: PowerShell
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/89032951-1aaa-42be-a5be-c6859c8ae4da
Unpacked files
SH256 hash:
2640b665406f3b4d8e7d0e4033e8574d764d0c12ee61f2dcc6866789609315b1
MD5 hash:
4803f002aabafa72d679a3673a84c457
SHA1 hash:
b2631134fca16b15b9c72fe7cd62c9f98321bab1
Link:
https://www.unpac.me/results/1933c42f-3427-46b9-bc83-a5ea278a95f3/
SH256 hash:
912aca4f9c471ec7a2a9ab3f9ec20cf103fc86bd67d5288573f7494a3653a519
MD5 hash:
37ed5515d030123c745882bd29a32286
SHA1 hash:
9f4af1b33909c0d465b01162898052ac1e98e6c1
Link:
https://www.unpac.me/results/1933c42f-3427-46b9-bc83-a5ea278a95f3/
SH256 hash:
0b7dcc18b0ef39734a24ca5923b02df82c670d08365fe376f2ed4ff9fcbc6303
MD5 hash:
0441cc0dacc6d821252e66a156b1d9bd
SHA1 hash:
df46cc702950a53a5de7b804d2076ef03f8ac6b4
Link:
https://www.unpac.me/results/1933c42f-3427-46b9-bc83-a5ea278a95f3/
SH256 hash:
b2da974ce7f0fb407e15e893454813890c3bedb788859ee2d6321c7c0311d3cf
MD5 hash:
a7ab71285bc9b6d04b3540b113a3e6a0
SHA1 hash:
68a49a519919bddabc850e37953239cce14bc1a0
Link:
https://www.unpac.me/results/1933c42f-3427-46b9-bc83-a5ea278a95f3/
SH256 hash:
2d9da9b03cbd20b47a292376ae7eb1d6cbf1e81549b26b53db767f8ceda705cd
MD5 hash:
c98da162ac35780b770f3475e17ec924
SHA1 hash:
555fbc70b564be8256042b84a3072f69b053f5c5
Link:
https://www.unpac.me/results/1933c42f-3427-46b9-bc83-a5ea278a95f3/
SH256 hash:
c51a6649c394fff8566dd845ed8b2f11b4adfa57486a9d16d645eebedc0605d9
MD5 hash:
34d1fa82399358cfc800d7b2a1d3aa13
SHA1 hash:
0d5c2fbd348ad21b0ff0b0edfb53b88a9b9f5dcc
Detections:
INDICATOR_KB_CERT_7c1118cbbadc95da3752c46e47a27438
Create hunting rule
Link:
https://www.unpac.me/results/1933c42f-3427-46b9-bc83-a5ea278a95f3/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/c51a6649c394/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/c51a6649c394fff8566dd845ed8b2f11b4adfa57486a9d16d645eebedc0605d9

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:INDICATOR_KB_CERT_7c1118cbbadc95da3752c46e47a27438
Create hunting rule
Author:ditekSHen
Description:Detects executables signed with stolen, revoked or invalid certificates
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:pe_imphash
Create hunting rule
Rule name:PE_Potentially_Signed_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

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

Web download

Formbook

Executable exe c51a6649c394fff8566dd845ed8b2f11b4adfa57486a9d16d645eebedc0605d9

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/2859848/

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


Avatar
zbet commented on 2024-05-22 19:07:04 UTC

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