MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ffb1f0ac81c2b55e6c5bbcf695b12b85dbef6a72f9d32e6fbc16f611ada393f2. 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: 12


Intelligence 12 IOCs YARA 4 File information Comments
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SHA256 hash: ffb1f0ac81c2b55e6c5bbcf695b12b85dbef6a72f9d32e6fbc16f611ada393f2
SHA3-384 hash: 6db32d63767430f9cd55f1deb0444c6e2ee9bf7e7601c74dadf7d00dc9ab551e51795288a6709d054575bf6394b12bba
SHA1 hash: 9b206e8552e13f8297266b12bf454d0ffb1c5ee5
MD5 hash: ee9dd3ac724b5f1d2ba98f49ffcdad85
humanhash: robert-winter-five-carpet
File name:Documents.Pdf.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:883'200 bytes
First seen:2021-08-24 13:50:51 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'661 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 12288:mo8dm2+Pv10wV0kaSHXNmHS+axGhgTBiJuy90SSCa:mKvmwVJl9m6GikJuy90D
Threatray 8'446 similar samples on MalwareBazaar
TLSH T1EE15063D19B91637D1B5C365EBE58423F149986FB414AE6A6CDE03A7030BA8734C723E
Reporter Anonymous
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
362
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Documents.Pdf.exe
Verdict:
Malicious activity
Analysis date:
2021-08-24 13:55:09 UTC
Tags:
trojan formbook stealer
Link:
https://app.any.run/tasks/4a1efa26-496b-44e2-87b9-c3192032b130

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/181933/
Detection(s):
SecuriteInfo.com.Trojan.Siggen14.63436.24012.8682.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
DNS request
Sending a UDP request
Launching a process
Creating a process with a hidden window
Using the Windows Management Instrumentation requests
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
Creating a process from a recently created file
Deleting a recently created file
Unauthorized injection to a recently created process
Creating a file
Launching cmd.exe command interpreter
Enabling autorun by creating a file
Unauthorized injection to a system process
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/9bf66996-30f9-4c35-b72f-918de60cb599
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/838337
Signature
.NET source code contains very large strings
Adds a directory exclusion to Windows Defender
Detected unpacking (changes PE section rights)
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
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)
Modifies the prolog of user mode functions (user mode inline hooks)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Powershell Defender Exclusion
Sigma detected: Suspicious Double Extension
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Uses an obfuscated file name to hide its real file extension (double extension)
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 signatures2 2 Behavior Graph ID: 470770 Sample: Documents.Pdf.exe Startdate: 24/08/2021 Architecture: WINDOWS Score: 100 49 Malicious sample detected (through community Yara rule) 2->49 51 Multi AV Scanner detection for dropped file 2->51 53 Multi AV Scanner detection for submitted file 2->53 55 11 other signatures 2->55 9 Documents.Pdf.exe 7 2->9         started        process3 file4 41 C:\Users\user\AppData\...\SWrrKxEqVhDtW.exe, PE32 9->41 dropped 43 C:\...\SWrrKxEqVhDtW.exe:Zone.Identifier, ASCII 9->43 dropped 45 C:\Users\user\AppData\Local\...\tmpFA10.tmp, XML 9->45 dropped 47 C:\Users\user\...\Documents.Pdf.exe.log, ASCII 9->47 dropped 63 Detected unpacking (changes PE section rights) 9->63 65 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 9->65 67 Uses schtasks.exe or at.exe to add and modify task schedules 9->67 69 3 other signatures 9->69 13 Documents.Pdf.exe 9->13         started        16 powershell.exe 21 9->16         started        18 powershell.exe 23 9->18         started        20 3 other processes 9->20 signatures5 process6 signatures7 71 Modifies the context of a thread in another process (thread injection) 13->71 73 Maps a DLL or memory area into another process 13->73 75 Sample uses process hollowing technique 13->75 77 Queues an APC in another process (thread injection) 13->77 22 cmmon32.exe 13->22         started        25 explorer.exe 13->25 injected 27 conhost.exe 16->27         started        29 conhost.exe 18->29         started        31 conhost.exe 20->31         started        33 conhost.exe 20->33         started        process8 signatures9 57 Modifies the context of a thread in another process (thread injection) 22->57 59 Maps a DLL or memory area into another process 22->59 61 Tries to detect virtualization through RDTSC time measurements 22->61 35 cmd.exe 22->35         started        37 autoconv.exe 25->37         started        process10 process11 39 conhost.exe 35->39         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/ffb1f0ac81c2b55e6c5bbcf695b12b85dbef6a72f9d32e6fbc16f611ada393f2/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
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Status:
Malicious
First seen:
2021-08-23 23:44:20 UTC
AV detection:
20 of 46 (43.48%)
Threat level:
  5/5
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
0726096c82c2c643c7de2ed48533e0a545e71f2294433cd7df473aebe9f17681
Formbook
4f0682de5c31ca8c535fc53b0232e67362981acce9d0b906fdc063c9ab29734b
Formbook
534d8b4992d534bc90055bab8ad3f479f29d613d573a42cf7e136dd84153b48b
Formbook
85357994a91c91c084eee5b52997631a7fd879f5fd0523bb2b01c9e1c7beb531
Formbook
8825f533e70aa57be6d942f520dabc1f91a7b39a068c55e91a3177f599fcb7d6
Formbook
92fee75dbfa7cb48d837b580cc3544832cf116d9991ac9cd0135cef22e535510
Formbook
c05bf234f0a814069b3cd844d38944e8e704bff80981657d549041b84c905da0
Formbook
c26154711ca9d9d48de370f242deb560bd0b99a0c8f12a2d1db5d4cd6e25d107
Formbook
ee3cd0b8ec089cdcec65b22189ecc9efb9f356afe0870e424cbdedcf19920e13
Formbook
+ 8'436 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:wrcb evasion rat spyware stealer suricata trojan
Link:
https://tria.ge/reports/210824-cyh39bazta/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Maps connected drives based on registry
Checks BIOS information in registry
Deletes itself
Looks for VMWare Tools registry key
Formbook Payload
Looks for VirtualBox Guest Additions in registry
Formbook
suricata: ET MALWARE FormBook CnC Checkin (GET)
Malware Config
C2 Extraction:
http://www.emeraldisle-msp.com/wrcb/
Unpacked files
SH256 hash:
8e81459a95753ed950a5b6f705b176b1a87f3a22a868ff81dcf73cdb8a13144c
MD5 hash:
9f88524edcd07583178b5b636b269dcd
SHA1 hash:
3159348245084344d0b71265fbdc38422193bc47
Link:
https://www.unpac.me/results/cee73125-f8b6-46fe-a614-558949bfb1a6/
SH256 hash:
6912e4bedd1288f116e968f0a79d9797f6d6bd24d45a5f10c52e20f9d33b8c61
MD5 hash:
03bde4a82ad64c0f314985232fbca3fa
SHA1 hash:
e8d0b6339e94192eaaca32c812f914e60576dca6
Link:
https://www.unpac.me/results/cee73125-f8b6-46fe-a614-558949bfb1a6/
SH256 hash:
a0287d8f751a975bb5083943fc7502b40ca6c0263a627f1cee14fa6c69fc97c3
MD5 hash:
3bd27b9aab5bb2eb5c12774846baaf71
SHA1 hash:
e4cb3477a848a6e6f674ea24f383274cb25025c5
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/cee73125-f8b6-46fe-a614-558949bfb1a6/
Parent samples :
85357994a91c91c084eee5b52997631a7fd879f5fd0523bb2b01c9e1c7beb531
ffb1f0ac81c2b55e6c5bbcf695b12b85dbef6a72f9d32e6fbc16f611ada393f2
8890d74ce4d1e62ad35e600ad8db65a7ff77f7116470f11703a7b140107d3344
SH256 hash:
ffb1f0ac81c2b55e6c5bbcf695b12b85dbef6a72f9d32e6fbc16f611ada393f2
MD5 hash:
ee9dd3ac724b5f1d2ba98f49ffcdad85
SHA1 hash:
9b206e8552e13f8297266b12bf454d0ffb1c5ee5
Link:
https://www.unpac.me/results/cee73125-f8b6-46fe-a614-558949bfb1a6/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/ffb1f0ac81c2/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/ffb1f0ac81c2b55e6c5bbcf695b12b85dbef6a72f9d32e6fbc16f611ada393f2

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_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFuture
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
Rule name:pe_imphash
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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.

  
Delivery method
Distributed via e-mail link
Cape
Cape
https://www.capesandbox.com/analysis/181933/

Comments