MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b71b353da449108a5ed6aac6e44133552651be0099dbba14884af1406874eaa0. 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: 20


Intelligence 20 IOCs YARA 4 File information Comments
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SHA256 hash: b71b353da449108a5ed6aac6e44133552651be0099dbba14884af1406874eaa0
SHA3-384 hash: ee993fc5e468474d79c7e64340db1408fbbd1827be1c2374d7929e1ac16302ad6f2851859109f740f42812c62bed0302
SHA1 hash: 28be937d4825809f593da427dd258b2aed86e05a
MD5 hash: 50b2874b18ed801760721ddeceaa2e2f
humanhash: stairway-coffee-charlie-charlie
File name:RFQ-GUE-245801.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:561'664 bytes
First seen:2024-09-24 09:42:48 UTC
Last seen:2024-09-24 14:19:24 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'614 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 12288:Kwbv8EXjsnoqXcT6gEkF6lLWBmccwip9X5C/ow:hbvfgoqs/Eo6/ccFk/
TLSH T195C423A99ACEDF4BC73D4FFD9520A80047B396D59E52E52BAFC85CDA0C91780D121B0B
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)
Magika pebin
Reporter lowmal3
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
3
# of downloads :
433
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
RFQ-GUE-245801.zip
Verdict:
Malicious activity
Analysis date:
2024-09-20 14:47:52 UTC
Tags:
formbook xloader
Link:
https://app.any.run/tasks/fc45e19b-ec6d-4a0b-981e-95c0093fd606

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Win32.PWSX-gen.2154.21350.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=66f289a88aca58c2b2c70e72
Tags:
Execution Network Stealth Variant Spawn Hype
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Сreating synchronization primitives
Creating a process with a hidden window
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Launching a process
Launching cmd.exe command interpreter
Setting browser functions hooks
Adding an exclusion to Microsoft Defender
Unauthorized injection to a system process
Unauthorized injection to a browser process
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
obfuscated packed
Link:
https://www.filescan.io/uploads/66f289ad775ab9bfb4713aaf/reports/cbad1179-3671-429d-b567-4ac3db4186e0/overview
Verdict:
Malicious
Labled as:
MSILHeracles.Generic
Link:
https://www.hybrid-analysis.com/sample/b71b353da449108a5ed6aac6e44133552651be0099dbba14884af1406874eaa0
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
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Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/5ca67e3c-76f4-4eae-a7a2-d2b63e981ffe
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1516534
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
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Found direct / indirect Syscall (likely to bypass EDR)
Found malware configuration
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Loading BitLocker PowerShell Module
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 submitted file
Query firmware table information (likely to detect VMs)
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Switches to a custom stack to bypass stack traces
Tries to detect virtualization through RDTSC time measurements
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1516534 Sample: RFQ-GUE-245801.exe Startdate: 24/09/2024 Architecture: WINDOWS Score: 100 40 www.nline-courses-classes-lv-1.bond 2->40 42 www.etangkhap99.lol 2->42 44 3 other IPs or domains 2->44 46 Found malware configuration 2->46 48 Malicious sample detected (through community Yara rule) 2->48 50 Antivirus detection for URL or domain 2->50 52 11 other signatures 2->52 11 RFQ-GUE-245801.exe 4 2->11         started        signatures3 process4 file5 38 C:\Users\user\...\RFQ-GUE-245801.exe.log, ASCII 11->38 dropped 62 Adds a directory exclusion to Windows Defender 11->62 64 Tries to detect virtualization through RDTSC time measurements 11->64 66 Injects a PE file into a foreign processes 11->66 68 Switches to a custom stack to bypass stack traces 11->68 15 RFQ-GUE-245801.exe 11->15         started        18 powershell.exe 23 11->18         started        signatures6 process7 signatures8 70 Modifies the context of a thread in another process (thread injection) 15->70 72 Maps a DLL or memory area into another process 15->72 74 Sample uses process hollowing technique 15->74 78 2 other signatures 15->78 20 explorer.exe 26 1 15->20 injected 76 Loading BitLocker PowerShell Module 18->76 22 conhost.exe 18->22         started        24 WmiPrvSE.exe 18->24         started        process9 process10 26 WWAHost.exe 20->26         started        29 WerFault.exe 21 20->29         started        signatures11 54 Modifies the context of a thread in another process (thread injection) 26->54 56 Maps a DLL or memory area into another process 26->56 58 Tries to detect virtualization through RDTSC time measurements 26->58 60 Switches to a custom stack to bypass stack traces 26->60 31 explorer.exe 130 26->31         started        34 cmd.exe 1 26->34         started        process12 signatures13 80 Query firmware table information (likely to detect VMs) 31->80 36 conhost.exe 34->36         started        process14
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b71b353da449108a5ed6aac6e44133552651be0099dbba14884af1406874eaa0
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b71b353da449108a5ed6aac6e44133552651be0099dbba14884af1406874eaa0/
Threat name:
Win32.Backdoor.FormBook
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Status:
Malicious
First seen:
2024-09-20 12:11:22 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
21 of 24 (87.50%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=w4ntkpnejeiiuxwwvldoiqjtkutfdpqathn3ufeijlyua2du5kqa._file
Verdict:
malicious
Label(s):
unknown_loader_037
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formbook
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Result
Malware family:
formbook
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Score:
  10/10
Tags:
family:formbook campaign:c24t discovery execution rat spyware stealer trojan
Link:
https://tria.ge/reports/240924-lpxjxazcjn/
Behaviour
Gathers network information
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
Deletes itself
Command and Scripting Interpreter: PowerShell
Formbook payload
Formbook
Verdict:
Malicious
Tags:
formbook
YARA:
n/a
Link:
https://app.threat.zone/submission/fa6b5c03-2d22-4be7-8b18-e5fdb33e0afb
Unpacked files
SH256 hash:
40babe4601da80b05397c6f203e270862747ea19ac9970dc59b3cf0df1d1fb87
MD5 hash:
a361843a96b935377a3e65f049fc50f3
SHA1 hash:
cf3cbeb8e1f17859cb0c08c655a0b23f89bc0cdd
Detections:
FormBook
Create hunting rule
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
win_formbook_w0
Create hunting rule
Formbook
Create hunting rule
Link:
https://www.unpac.me/results/8b2aa729-847e-4770-a826-590584ae2ed1/
Parent samples :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 hash:
833a3555d319e6784113311807250953b6c0f49ce9c088a41afd4d10a9a0c2b7
MD5 hash:
562d93cb3f9aa8b8b0ec32df65adc426
SHA1 hash:
e21cb134a872a3ede1dba2ec6a9f4f5a21a70547
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/8b2aa729-847e-4770-a826-590584ae2ed1/
SH256 hash:
fc1d10fdac1e6a50fe9de4187becdcd622d3c8fa515f5d975246e5164f720a00
MD5 hash:
fbd9f4c6e0b46678c966c31753260505
SHA1 hash:
c35c559904613da0e53c66331e84d2d9e1ac212b
Link:
https://www.unpac.me/results/8b2aa729-847e-4770-a826-590584ae2ed1/
SH256 hash:
d1f4761e2e1e15fe454a70864c3aa1da7d6dc90582222bbd7e6d53d0bbee6f62
MD5 hash:
b08a9c9cb485bd7567bf062922a1e897
SHA1 hash:
3b5781fb115d06bdede80cb6ff627fde1a50d9f5
Link:
https://www.unpac.me/results/8b2aa729-847e-4770-a826-590584ae2ed1/
Parent samples :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 hash:
b71b353da449108a5ed6aac6e44133552651be0099dbba14884af1406874eaa0
MD5 hash:
50b2874b18ed801760721ddeceaa2e2f
SHA1 hash:
28be937d4825809f593da427dd258b2aed86e05a
Link:
https://www.unpac.me/results/8b2aa729-847e-4770-a826-590584ae2ed1/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b71b353da449/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/b71b353da449108a5ed6aac6e44133552651be0099dbba14884af1406874eaa0

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
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Author:malware-lu
Rule name:pe_imphash
Create hunting rule
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.

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

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