MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 81ca38001ad9f05b6f89e4e956cbd1efce397ebdb516b6e381c777e28b6dadbb. 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: 14


Intelligence 14 IOCs YARA 2 File information Comments 1
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SHA256 hash: 81ca38001ad9f05b6f89e4e956cbd1efce397ebdb516b6e381c777e28b6dadbb
SHA3-384 hash: 9179285cae366474fb24e947bbd9a6f36466655f3e366a0de4d4f9eebe082e855e6ffc6ae92f23d8a9b14a07b78b5751
SHA1 hash: ffea334243620192a510b9b5f99fb7e9a4965244
MD5 hash: dc5e526b968a84484389aa5071691b4c
humanhash: bulldog-fix-seven-cat
File name:dc5e526b968a84484389aa5071691b4c
Download: download sample
Signature Formbook
Create hunting rule
File size:1'037'312 bytes
First seen:2022-03-14 20:25:21 UTC
Last seen:2022-04-20 10:24:47 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'656 x AgentTesla, 19'464 x Formbook, 12'205 x SnakeKeylogger)
ssdeep 24576:Gy1qNMVA3VrnmBGOo4lOysD2pGHcwRJPLC5xtr:XIAAFrnm0R4lOysD2pG8wLLCB
TLSH T1CB25D0E0FF0896BEDC01613AC5A85C701DB56B9D2519BF06A17F20DD453BACF49A2C2E
File icon (PE):PE icon
dhash icon ce9c9496e4949c9c (73 x AgentTesla, 51 x SnakeKeylogger, 30 x Formbook)
Reporter zbetcheckin
Tags:32 exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
191
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
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Link:
https://www.capesandbox.com/analysis/250434/
Detection(s):
SecuriteInfo.com.MSIL.Kryptik.WZA.UNOFFICIAL
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Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Sending a custom TCP request
Unauthorized injection to a recently created process
Creating a file
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated packed
Link:
https://www.filescan.io/uploads/622fa4e10cd58dbd9298fd2b/reports/edcb064b-516c-4760-8034-5fd6db801544/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.
Malware family:
Formbook
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Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/4bd1ef06-0be8-4a33-9e91-aa2ba7427d7d
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/956526
Signature
Antivirus detection for URL or domain
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)
Modifies the prolog of user mode functions (user mode inline hooks)
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Self deletion via cmd delete
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
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 589009 Sample: Hyv4PtfwFd Startdate: 14/03/2022 Architecture: WINDOWS Score: 100 36 Found malware configuration 2->36 38 Malicious sample detected (through community Yara rule) 2->38 40 Antivirus detection for URL or domain 2->40 42 7 other signatures 2->42 10 Hyv4PtfwFd.exe 3 2->10         started        process3 file4 34 C:\Users\user\AppData\...\Hyv4PtfwFd.exe.log, ASCII 10->34 dropped 52 Tries to detect virtualization through RDTSC time measurements 10->52 14 Hyv4PtfwFd.exe 10->14         started        17 Hyv4PtfwFd.exe 10->17         started        19 Hyv4PtfwFd.exe 10->19         started        21 2 other processes 10->21 signatures5 process6 signatures7 54 Modifies the context of a thread in another process (thread injection) 14->54 56 Maps a DLL or memory area into another process 14->56 58 Sample uses process hollowing technique 14->58 60 Queues an APC in another process (thread injection) 14->60 23 explorer.exe 14->23 injected process8 process9 25 chkdsk.exe 23->25         started        28 autofmt.exe 23->28         started        signatures10 44 Self deletion via cmd delete 25->44 46 Modifies the context of a thread in another process (thread injection) 25->46 48 Maps a DLL or memory area into another process 25->48 50 Tries to detect virtualization through RDTSC time measurements 25->50 30 cmd.exe 1 25->30         started        process11 process12 32 conhost.exe 30->32         started       
Detection:
formbook
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Link:
https://mwdb.cert.pl/sample/81ca38001ad9f05b6f89e4e956cbd1efce397ebdb516b6e381c777e28b6dadbb/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
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Status:
Malicious
First seen:
2022-03-14 20:26:15 UTC
File Type:
PE (.Net Exe)
Extracted files:
9
AV detection:
23 of 27 (85.19%)
Threat level:
  5/5
Verdict:
malicious
Label(s):
formbook
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Result
Malware family:
formbook
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Score:
  10/10
Tags:
family:formbook campaign:g2e7 rat spyware stealer trojan
Link:
https://tria.ge/reports/220314-y7vt9acaf9/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
.NET Reactor proctector
Formbook Payload
Formbook
Unpacked files
SH256 hash:
9b00e2fa33ad72dec22a5e107ab6886da72bbe0bed89a721e877c1dc3ce6a662
MD5 hash:
b4c9c16228f0ee1de70ffc6264fb720c
SHA1 hash:
437049e452a511e220abdb32df695cdf07f5a7d0
Link:
https://www.unpac.me/results/177c5870-d48b-4fa6-a13e-741331c5c6b3/
SH256 hash:
f559cf2cc60db9a1d9fb9296c8e6a4656588fe69471de655458a924106158131
MD5 hash:
dc5b67bfb097853fe296f85fd84c71d6
SHA1 hash:
73ab5b367489973b89d54fbc1692b3d3be55421b
Link:
https://www.unpac.me/results/177c5870-d48b-4fa6-a13e-741331c5c6b3/
SH256 hash:
423145bce25be3c1d16ece3dcbcbf6c16296cfe6b3527cb5368f5cc6cf8e06b3
MD5 hash:
6f40fe22a061c1d6595ed31c34507444
SHA1 hash:
e66f2ea9f02ad6e352fc223abdd0c67c56f7a120
Link:
https://www.unpac.me/results/177c5870-d48b-4fa6-a13e-741331c5c6b3/
SH256 hash:
6f290dff7c68f73aff45d09c3ea10847f1305b59ca09bba6b87b0bfb24cf6553
MD5 hash:
bb9017e04aab48de8eba50f5704933f5
SHA1 hash:
85cdd5fed8703d98af059b9b3892ccc7a2a5bf0c
Detections:
win_formbook_g0
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win_formbook_auto
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Link:
https://www.unpac.me/results/177c5870-d48b-4fa6-a13e-741331c5c6b3/
Parent samples :
9577df8b7e48bb30b9bd48e49c548d45cc5cc4a9bf1b93aa79f4ab35fc977cb3
81ca38001ad9f05b6f89e4e956cbd1efce397ebdb516b6e381c777e28b6dadbb
059bdd3a82690647000d29fd9d7957782518cf71ab9c848666992508c4bb0c2e
154e83d504788a5a1a35d1758157daefaed1810f8752601cf4dd5577d626b59b
c6a3fd36f07d97fb287fbac946ae8b8d12d1fcde36fa87395de79d59f0c3fb77
b71ecfd70a10c73be177dd8fb3a3dcfbc39dc06e7e3646b43c2901e75a79f4a9
3e3ccb3b130c86bb2d82a52f8a7e191efa9499577ba0a3d3f335d5a1e1597b76
9cfa1deda62a35bf8c2211bf4c1996d880c84c4242308a5d74403a570d70e066
9e3075aeadf4672cd6edfeb02d197a31a05be6330e3d179125c68c9d60893d18
SH256 hash:
81ca38001ad9f05b6f89e4e956cbd1efce397ebdb516b6e381c777e28b6dadbb
MD5 hash:
dc5e526b968a84484389aa5071691b4c
SHA1 hash:
ffea334243620192a510b9b5f99fb7e9a4965244
Link:
https://www.unpac.me/results/177c5870-d48b-4fa6-a13e-741331c5c6b3/
Malware family:
FormBook
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Verdict:
Malicious
Link:
https://www.vmray.com/analyses/81ca38001ad9/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.65
Link:
https://yomi.yoroi.company/submissions/81ca38001ad9f05b6f89e4e956cbd1efce397ebdb516b6e381c777e28b6dadbb

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.

Web download

Formbook

Executable exe 81ca38001ad9f05b6f89e4e956cbd1efce397ebdb516b6e381c777e28b6dadbb

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/2096984/
Cape
Cape
https://www.capesandbox.com/analysis/250434/

Comments


Avatar
zbet commented on 2022-03-14 20:25:25 UTC

url : hxxp://2.58.149.41/emezx.exe