MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a53a4c82477eada893191662cf4ab4b3f44d1da7cae9ea8a7de3f859a424292b. 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 3 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a53a4c82477eada893191662cf4ab4b3f44d1da7cae9ea8a7de3f859a424292b
SHA3-384 hash: 44df5cf7c0d57e811ae6f49befeeac9c90128f691fb0c0260f518f0c2525e053fba9e722281ec3e2f5ffc1802bc737b0
SHA1 hash: c57dbed8e46b6ded603d67294d2e159bfe90b1ff
MD5 hash: c8f7096833654a62280f5897fccfde65
humanhash: july-london-equal-rugby
File name:c8f7096833654a62280f5897fccfde65
Download: download sample
Signature Formbook
Create hunting rule
File size:820'224 bytes
First seen:2021-08-16 09:43:46 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'742 x AgentTesla, 19'607 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 12288:sVfa9KTfDpfZ5subXEWAKKsQ3PnMEP2gp0S5JOEPpBja:Y0KTf1LLXEWAKKdnME+L6HPi
Threatray 7'860 similar samples on MalwareBazaar
TLSH T1DF05CFB071A78696F51F4A742578BD5403B131F3A9C6DA391B1A604ACFEDE983F4820F
Reporter zbetcheckin
Tags:32 exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
176
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
138466490407366483.xlsx
Verdict:
Malicious activity
Analysis date:
2021-08-16 08:44:30 UTC
Tags:
encrypted opendir exploit CVE-2017-11882 loader
Link:
https://app.any.run/tasks/2baba72a-2afa-4524-8476-509b7c53c493

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/179488/
Detection(s):
SecuriteInfo.com.PUA.EmbeddedEXE-1.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Using the Windows Management Instrumentation requests
Unauthorized injection to a recently created process
Creating a file
Result
Verdict:
UNKNOWN
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/8b821c9a-8312-411e-99f6-99a8d0e0d895
Result
Threat name:
Unknown
Detection:
malicious
Classification:
evad
Score:
96 / 100
Link:
https://www.joesandbox.com/analysis/833418
Signature
Machine Learning detection for sample
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 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: SAM Dump to AppData
Sigma detected: Suspicious PowerShell Invocations - Specific
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
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 465845 Sample: hZa8u7cQnw Startdate: 16/08/2021 Architecture: WINDOWS Score: 96 38 Multi AV Scanner detection for submitted file 2->38 40 Machine Learning detection for sample 2->40 42 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 2->42 44 3 other signatures 2->44 9 hZa8u7cQnw.exe 3 2->9         started        process3 file4 30 C:\Users\user\AppData\...\hZa8u7cQnw.exe.log, ASCII 9->30 dropped 54 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 9->54 56 Tries to detect virtualization through RDTSC time measurements 9->56 13 hZa8u7cQnw.exe 9->13         started        16 hZa8u7cQnw.exe 9->16         started        signatures5 process6 signatures7 58 Modifies the context of a thread in another process (thread injection) 13->58 60 Maps a DLL or memory area into another process 13->60 62 Sample uses process hollowing technique 13->62 64 Queues an APC in another process (thread injection) 13->64 18 help.exe 13->18         started        21 explorer.exe 13->21 injected process8 dnsIp9 46 Modifies the context of a thread in another process (thread injection) 18->46 48 Maps a DLL or memory area into another process 18->48 50 Tries to detect virtualization through RDTSC time measurements 18->50 24 cmd.exe 1 18->24         started        32 www.superiorshinedetailing.net 21->32 34 www.gorillarecruiting.com 21->34 36 gorillarecruiting.com 34.102.136.180, 49746, 80 GOOGLEUS United States 21->36 52 System process connects to network (likely due to code injection or exploit) 21->52 26 autofmt.exe 21->26         started        signatures10 process11 process12 28 conhost.exe 24->28         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/a53a4c82477eada893191662cf4ab4b3f44d1da7cae9ea8a7de3f859a424292b/
Threat name:
ByteCode-MSIL.Trojan.Sabsik
Create hunting rule
Status:
Malicious
First seen:
2021-08-16 09:44:05 UTC
AV detection:
17 of 47 (36.17%)
Threat level:
  5/5
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
049f2bcbaa6d18cf9ee22b12c47ba8578c938d04df6d35a3c4cd3ed81fdcf4ab
Formbook
1bb79d3f58130c38c2d1c54737aaa69bfdf5693cf6177efaac78377020b86ad6
Formbook
2f4d0e2ce90ab2c35dcba4c85e38346eae6ac2cef0f939ccdd21cade4d6343ca
Formbook
55d713c0259fec5f0e64aa9f01d63ee1db90b60960e3b61b11e36bf1cd0fd2f1
Formbook
5e8297dde5b002b5304bf70d6e33db9bbd40cda37f0e02edaddd732657f6ac32
Formbook
96e8216c941bcea44a0c6d68019cec29c0bc8bf58cc8a20d61fbbf286c0f3ddd
Formbook
a03ebb1ad2450b07206923043ad865cb83e1d4798a9273704a9626854fd17399
Formbook
e65ddcb1e8d85b5d13ab1aaf5d9747feea1e3e442ed82773640d740627f4d7ca
Formbook
f10508b4bd982e597771e6128fede0b532c42cb799ac495c922940c27a942dbe
Formbook
+ 7'850 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:nff evasion rat spyware stealer trojan
Link:
https://tria.ge/reports/210816-m2e71ev3pn/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Maps connected drives based on registry
Checks BIOS information in registry
Looks for VMWare Tools registry key
Formbook Payload
Looks for VirtualBox Guest Additions in registry
Formbook
Malware Config
C2 Extraction:
http://www.yellow-wink.com/nff/
Unpacked files
SH256 hash:
cefb4fa9d8f118ece98e8e9da00644e3d086058903f64721335b513af69b0892
MD5 hash:
7413d26f5700cfee7acdf5c6f5c5d89c
SHA1 hash:
05906b80d83de78d0bee721893f69be0ceb608a9
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/7e850fd9-58d1-40a6-9952-f225303608a7/
Parent samples :
e65ddcb1e8d85b5d13ab1aaf5d9747feea1e3e442ed82773640d740627f4d7ca
55d713c0259fec5f0e64aa9f01d63ee1db90b60960e3b61b11e36bf1cd0fd2f1
5e8297dde5b002b5304bf70d6e33db9bbd40cda37f0e02edaddd732657f6ac32
a03ebb1ad2450b07206923043ad865cb83e1d4798a9273704a9626854fd17399
a53a4c82477eada893191662cf4ab4b3f44d1da7cae9ea8a7de3f859a424292b
e2c11a82ce76ab32b7033c6d47081c6c44fe2288211fe0af6202f3333196cbe6
SH256 hash:
5c5263197efeeec36fd43b6727d92eed3cf0b6e39b1272db9679feba1d8ac9c7
MD5 hash:
26d8d9c6e6add7f2092bb966d5446279
SHA1 hash:
fa484c522d9f9629fd3ccaab188edfa3668a949a
Link:
https://www.unpac.me/results/7e850fd9-58d1-40a6-9952-f225303608a7/
SH256 hash:
6912e4bedd1288f116e968f0a79d9797f6d6bd24d45a5f10c52e20f9d33b8c61
MD5 hash:
03bde4a82ad64c0f314985232fbca3fa
SHA1 hash:
e8d0b6339e94192eaaca32c812f914e60576dca6
Link:
https://www.unpac.me/results/7e850fd9-58d1-40a6-9952-f225303608a7/
SH256 hash:
a53a4c82477eada893191662cf4ab4b3f44d1da7cae9ea8a7de3f859a424292b
MD5 hash:
c8f7096833654a62280f5897fccfde65
SHA1 hash:
c57dbed8e46b6ded603d67294d2e159bfe90b1ff
Link:
https://www.unpac.me/results/7e850fd9-58d1-40a6-9952-f225303608a7/
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/a53a4c82477eada893191662cf4ab4b3f44d1da7cae9ea8a7de3f859a424292b

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: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.

Web download

Formbook

Executable exe a53a4c82477eada893191662cf4ab4b3f44d1da7cae9ea8a7de3f859a424292b

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/1538634/
Cape
Cape
https://www.capesandbox.com/analysis/179488/

Comments


Avatar
zbet commented on 2021-08-16 09:43:47 UTC

url : hxxp://103.171.0.73/Resource/.svchost.exe