MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c76a77d2c81deab2fda96cc7cfcd42ca3886522b254ab6fa7448c7db8692e00a. 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: 9


Intelligence 9 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c76a77d2c81deab2fda96cc7cfcd42ca3886522b254ab6fa7448c7db8692e00a
SHA3-384 hash: 2c2970f9896743e4539f65149caf880ec45ecbcbb7c22c0b572759c3c1efa8957b8a8772875670a120001ee3e18afe9c
SHA1 hash: 727851ce8c287a4c080994f891ed78352cc93b8e
MD5 hash: 391975e669d455f1adecc5ca6a60f66a
humanhash: maryland-lake-two-thirteen
File name:pago SWift pdf.exe
Download: download sample
Signature FormBook
Create hunting rule
File size:645'120 bytes
First seen:2021-02-20 11:26:38 UTC
Last seen:2021-02-20 12:47:54 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 12288:6MzAvm9T+nin+nin+ni3AqeFsfWNhRaNoLDSFI3cFHh20QL+niu:6aAO9T+in+in+iQNsfWnL2FucFg+i
Threatray 3'564 similar samples on MalwareBazaar
TLSH 68D48DD32E54DB38D77A4BBC5163F110A3F7AC06D3E1C68DADC5309B2869EA3535A212
Reporter abuse_ch
Tags:exe FormBook


Avatar
abuse_ch
Malspam distributing FormBook:

HELO: srv03.webparaguay.com
Sending IP: 177.251.252.12
From: jorge vasquez <ventas@guyer.com.uy>
Subject: RE: copia rápida
Attachment: pago SWift pdf.zip (contains "pago SWift pdf.exe")

Intelligence

File Origin
# of uploads :
2
# of downloads :
223
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/118112/
Detection(s):
SecuriteInfo.com.Variant.Barys.13779.17507.25230.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
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.
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/613276
Signature
.NET source code contains potential unpacker
Binary contains a suspicious time stamp
C2 URLs / IPs found in malware configuration
Found malware configuration
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 domain / URL
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Uses ipconfig to lookup or modify the Windows network settings
Yara detected AntiVM_3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 355654 Sample: pago SWift pdf.exe Startdate: 20/02/2021 Architecture: WINDOWS Score: 100 27 Multi AV Scanner detection for domain / URL 2->27 29 Found malware configuration 2->29 31 Malicious sample detected (through community Yara rule) 2->31 33 10 other signatures 2->33 10 pago SWift pdf.exe 3 2->10         started        process3 file4 25 C:\Users\user\...\pago SWift pdf.exe.log, ASCII 10->25 dropped 13 pago SWift pdf.exe 10->13         started        process5 signatures6 37 Modifies the context of a thread in another process (thread injection) 13->37 39 Maps a DLL or memory area into another process 13->39 41 Sample uses process hollowing technique 13->41 43 Queues an APC in another process (thread injection) 13->43 16 explorer.exe 13->16 injected process7 process8 18 ipconfig.exe 16->18         started        signatures9 35 Tries to detect virtualization through RDTSC time measurements 18->35 21 cmd.exe 1 18->21         started        process10 process11 23 conhost.exe 21->23         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/c76a77d2c81deab2fda96cc7cfcd42ca3886522b254ab6fa7448c7db8692e00a/
Threat name:
ByteCode-MSIL.Trojan.Taskun
Create hunting rule
Status:
Malicious
First seen:
2021-02-20 11:14:19 UTC
AV detection:
11 of 47 (23.40%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=y5vhpuwidxvlf7njntd47tkczi4imurlevfln6tujdd5xbus4afa._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
09715a97873a089c9dc80219175d50508628f4f794639c2e725bad85d68804c2
FormBook
48afec636886aebdf7f0be7d5b9c034f2568b890215a15f13554933d94322045
FormBook
5d617282230f991221360f213e15b0e62d0c462afc3d32299c9b410658fbb106
FormBook
6a0c21a5a37e307becd9ed9bdee0f3f41e3d1a61847a6e9ae272ec891d4f7728
FormBook
7ffcfe208773bc49ef7a0e832fe117592b8eaf83484ebc9cfe9c64eb354aadec
FormBook
8c5a90a4c4470d05fff7757920aa0a8bf56edab04f4eb926ba789652f1bfc74c
FormBook
9e38c0c3c516583da526016c4c6a671c53333d3d156562717db79eac63587522
FormBook
c848b9f81ec7dcc330cc57ede3482805ccad25143eac801f7f56fc5cc0ccace5
FormBook
d68888aa1e155ac65bd1ddabcf05f61bfff65f79a11cc0ee099200c3da8c5d35
FormBook
d8ae48ff83b31d072c1a9d988660e2a0be125aa9373a4adb1dd807d0fea4ebe5
FormBook
+ 3'554 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook rat spyware stealer trojan
Link:
https://tria.ge/reports/210220-b4yx1a18m2/
Behaviour
Gathers network information
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Deletes itself
Formbook Payload
Formbook
Malware Config
C2 Extraction:
http://www.joomlas123.info/n7ak/
Unpacked files
SH256 hash:
b2f91d1427c7b60a3ad485bed04ba75636560783c9265a8f26542d5f6aa5d8a9
MD5 hash:
5ad6dc03137fc80e4e691f4b409d9120
SHA1 hash:
edb38e49ce79ecce33ce9a891df56468c3a4016e
Link:
https://www.unpac.me/results/d8cb292f-836a-4ee0-bec4-e39bdae3d579/
SH256 hash:
c76a77d2c81deab2fda96cc7cfcd42ca3886522b254ab6fa7448c7db8692e00a
MD5 hash:
391975e669d455f1adecc5ca6a60f66a
SHA1 hash:
727851ce8c287a4c080994f891ed78352cc93b8e
Link:
https://www.unpac.me/results/d8cb292f-836a-4ee0-bec4-e39bdae3d579/
Please note that we are no longer able to provide a coverage score for Virus Total.

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_InTheFu
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
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

File information

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

Malspam

FormBook

zip e4947b26c5306a3abf3699d57d332983f1fd64c7d0b676e49f6dfa8bafca59d0

FormBook

Executable exe c76a77d2c81deab2fda96cc7cfcd42ca3886522b254ab6fa7448c7db8692e00a

(this sample)

  
Dropped by
MD5 f5c9afcc50905b9670479f4fc959cc46
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/118112/
  
Dropped by
SHA256 e4947b26c5306a3abf3699d57d332983f1fd64c7d0b676e49f6dfa8bafca59d0

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