MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b4941d8f5e456102b2283c02590294a1896348e32dc78074d9bbf96990896e7c. 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: 11


Intelligence 11 IOCs YARA 2 File information Comments
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SHA256 hash: b4941d8f5e456102b2283c02590294a1896348e32dc78074d9bbf96990896e7c
SHA3-384 hash: e68cc63aef8f2efa1ebe6984c0af411b4bcd02fce413a62367e8067fd8285a4ae278ca1de9eac618b0bcbda6d3bb91e8
SHA1 hash: e156788bebd938d9290f361c752f4375e46bc8b2
MD5 hash: e00666e6a886a301b612ed07131010b3
humanhash: skylark-skylark-hotel-wolfram
File name:DOCUMENTS.bat.exe
Download: download sample
Signature Formbook
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File size:531'968 bytes
First seen:2022-06-09 19:21:56 UTC
Last seen:2022-06-10 01:20:38 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'749 x AgentTesla, 19'653 x Formbook, 12'246 x SnakeKeylogger)
ssdeep 12288:pmp4zWjOfCMUexrB4E3WUqFjjQ0o34gOJopxF3m:pmYfPUeReyWz5QP4lJopxF3m
TLSH T13BB4F219239C1797E729EFB24431B04AD7B6750B6811FB074DC7A6EB6831B00A8356BF
TrID 64.2% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
11.5% (.SCR) Windows screen saver (13101/52/3)
9.2% (.EXE) Win64 Executable (generic) (10523/12/4)
5.7% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
3.9% (.EXE) Win32 Executable (generic) (4505/5/1)
Reporter James_inthe_box
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
5
# of downloads :
321
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
DOCUMENTS.bat.exe
Verdict:
Suspicious activity
Analysis date:
2022-06-09 19:54:09 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/1949da73-ef7d-4c91-a38e-25d2286aab36

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/278464/
Detection(s):
SecuriteInfo.com.Variant.Tedy.116939.7636.29034.UNOFFICIAL
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Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Adding an access-denied ACE
Launching a process
Сreating synchronization primitives
Searching for synchronization primitives
Creating a file
Launching cmd.exe command interpreter
Reading critical registry keys
Sending a custom TCP request
DNS request
Sending an HTTP GET request
Creating a file in the %temp% directory
Unauthorized injection to a recently created process
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Stealing user critical data
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
packed wacatac
Link:
https://www.filescan.io/uploads/62a2485b8e867832d9ecb60c/reports/dbefc7d0-e642-4cdc-8f4b-a4ea72612801/overview
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.
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/33fae78b-21c7-4896-b34d-eb63f5770d8c
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1010348
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Contains functionality to hide user accounts
Initial sample is a PE file and has a suspicious name
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
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Snort IDS alert for network traffic
System process connects to network (likely due to code injection or exploit)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Yara detected AntiVM3
Yara detected FormBook
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 642841 Sample: DOCUMENTS.bat.exe Startdate: 09/06/2022 Architecture: WINDOWS Score: 100 36 www.betterviewconstructionlbk.com 2->36 38 www.comodoroaudio.com 2->38 42 Snort IDS alert for network traffic 2->42 44 Malicious sample detected (through community Yara rule) 2->44 46 Antivirus detection for URL or domain 2->46 48 10 other signatures 2->48 11 DOCUMENTS.bat.exe 1 2->11         started        signatures3 process4 file5 28 C:\Users\user\...\DOCUMENTS.bat.exe.log, ASCII 11->28 dropped 14 unregmp2.exe 11->14         started        process6 signatures7 56 Modifies the context of a thread in another process (thread injection) 14->56 58 Maps a DLL or memory area into another process 14->58 60 Sample uses process hollowing technique 14->60 62 2 other signatures 14->62 17 explorer.exe 14->17 injected process8 dnsIp9 30 dd2buftl6ph7uy.life 216.18.208.202, 49873, 80 WEBNXUS United States 17->30 32 www.orioncyberinternet.com 194.233.79.65, 49861, 80 NEXINTO-DE Germany 17->32 34 6 other IPs or domains 17->34 40 System process connects to network (likely due to code injection or exploit) 17->40 21 chkdsk.exe 17->21         started        signatures10 process11 signatures12 50 Modifies the context of a thread in another process (thread injection) 21->50 52 Maps a DLL or memory area into another process 21->52 54 Tries to detect virtualization through RDTSC time measurements 21->54 24 cmd.exe 1 21->24         started        process13 process14 26 conhost.exe 24->26         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b4941d8f5e456102b2283c02590294a1896348e32dc78074d9bbf96990896e7c/
Threat name:
ByteCode-MSIL.Trojan.FormBook
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Status:
Malicious
First seen:
2022-06-09 18:01:39 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
19 of 26 (73.08%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wskb3d26ivqqfmrihqbfsauuugewgshdfxdya5gzxp4wteejnz6a._file
Verdict:
malicious
Label(s):
formbook
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Result
Malware family:
xloader
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Score:
  10/10
Tags:
family:formbook family:xloader campaign:sdzp loader persistence rat spyware stealer suricata trojan
Link:
https://tria.ge/reports/220609-x272ysbdam/
Behaviour
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of WriteProcessMemory
Program crash
Drops file in Program Files directory
Suspicious use of SetThreadContext
Adds Run key to start application
Reads user/profile data of web browsers
Executes dropped EXE
Xloader Payload
Formbook
Xloader
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata: ET MALWARE FormBook CnC Checkin (POST) M2
Unpacked files
SH256 hash:
ecb3c4927acf3cb572a1fff741dd5f25109262b32830e3651a94dda634ff23e2
MD5 hash:
411d7a77af9e80803ce87516f1a7ab40
SHA1 hash:
6e2ee45d039d350e5453beabc1b50269b0d33023
Link:
https://www.unpac.me/results/374cd08d-33c0-4c82-acd2-cc6306512b02/
SH256 hash:
70b785e5cb5b2e61c0f5da4a71ab0bbd14d9a0849387f037e0d75cc1ffe0a082
MD5 hash:
5951b52c9b4d11ca7f4f33e5a3fb2c31
SHA1 hash:
0bc54fd699fff7b93e5c447a141c0d904924ab0d
Link:
https://www.unpac.me/results/374cd08d-33c0-4c82-acd2-cc6306512b02/
SH256 hash:
b4941d8f5e456102b2283c02590294a1896348e32dc78074d9bbf96990896e7c
MD5 hash:
e00666e6a886a301b612ed07131010b3
SHA1 hash:
e156788bebd938d9290f361c752f4375e46bc8b2
Link:
https://www.unpac.me/results/374cd08d-33c0-4c82-acd2-cc6306512b02/
Malware family:
XLoader
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Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b4941d8f5e45/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.38
Link:
https://yomi.yoroi.company/submissions/b4941d8f5e456102b2283c02590294a1896348e32dc78074d9bbf96990896e7c

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:pe_imphash
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Rule name:Skystars_Malware_Imphash
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Author:Skystars LightDefender
Description:imphash

File information

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

Malspam

Formbook

zip e8fe0afc2b7389e8076611a6ba77a83438076d8bf1acb2b2333f7fc95eaf339b

Formbook

Executable exe b4941d8f5e456102b2283c02590294a1896348e32dc78074d9bbf96990896e7c

(this sample)

  
Delivery method
Other
Cape
Cape
https://www.capesandbox.com/analysis/278464/
  
Dropped by
SHA256 e8fe0afc2b7389e8076611a6ba77a83438076d8bf1acb2b2333f7fc95eaf339b
  
Dropped by
MD5 dcdda5f815d6dc49ce93256c77f9b0a9
  
Dropped by
SHA256 c20358e89b0e1c53b16cc6ee449c6202554488ecbab62ec89489fed5ea7b2ac0
  
Dropped by
MD5 91563a68457129371ff0016769520698

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