MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 cb13b76515eda9a32e999b61c7e11e01de16ebeaf9ae6c503a1a0d238bc5bf37. 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


OskiStealer


Vendor detections: 14


Intelligence 14 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: cb13b76515eda9a32e999b61c7e11e01de16ebeaf9ae6c503a1a0d238bc5bf37
SHA3-384 hash: 247ac9804c01d25990b0918364d8d9fd87db26465ffc1da81995989562599ccf94bffdc8a1487f9cf145601d29fb8d85
SHA1 hash: 2fe12228562a605948fb09cc80eb98e0dabf19cf
MD5 hash: 5b239035e20815d69bd18ecbc75d77ee
humanhash: wisconsin-lactose-ohio-six
File name:5b239035e20815d69bd18ecbc75d77ee.exe
Download: download sample
Signature OskiStealer
Create hunting rule
File size:472'576 bytes
First seen:2021-12-20 15:32:24 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'740 x AgentTesla, 19'600 x Formbook, 12'241 x SnakeKeylogger)
ssdeep 12288:LyInXSIX4PQFACJRFaO1lVj0R+WtBkWE91g4dtGG:OaFfaCcO1bjsc3g47GG
Threatray 12'396 similar samples on MalwareBazaar
TLSH T119A4E0AD3597ABDED97107F937B9507403A62C766427C299DC8631CB2973B00BA32B13
File icon (PE):PE icon
dhash icon b3b3333969693b3b (69 x Formbook, 63 x AgentTesla, 26 x Loki)
Reporter abuse_ch
Tags:exe OskiStealer

Intelligence

File Origin
# of uploads :
1
# of downloads :
146
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/215498/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
DNS request
Unauthorized injection to a recently created process
Creating a file
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
75%
Tags:
fareit obfuscated packed
Link:
https://www.filescan.io/uploads/61c0a231ec6c6c14a9e54edf/reports/47704dc8-bd19-45a5-b62a-a1686a7abaf0/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
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/433148a6-6bad-45fe-9c75-38429548009d
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/910375
Signature
.NET source code contains potential unpacker
C2 URLs / IPs found in malware configuration
Found malware configuration
Injects a PE file into a foreign processes
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
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
Uses ipconfig to lookup or modify the Windows network settings
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 542860 Sample: T2nM6VYDOO.exe Startdate: 20/12/2021 Architecture: WINDOWS Score: 100 34 www.pophaircare.com 2->34 36 Found malware configuration 2->36 38 Malicious sample detected (through community Yara rule) 2->38 40 Multi AV Scanner detection for submitted file 2->40 42 5 other signatures 2->42 11 T2nM6VYDOO.exe 3 2->11         started        signatures3 process4 file5 32 C:\Users\user\AppData\...\T2nM6VYDOO.exe.log, ASCII 11->32 dropped 54 Tries to detect virtualization through RDTSC time measurements 11->54 56 Injects a PE file into a foreign processes 11->56 15 T2nM6VYDOO.exe 11->15         started        18 T2nM6VYDOO.exe 11->18         started        signatures6 process7 signatures8 58 Modifies the context of a thread in another process (thread injection) 15->58 60 Maps a DLL or memory area into another process 15->60 62 Sample uses process hollowing technique 15->62 64 Queues an APC in another process (thread injection) 15->64 20 explorer.exe 15->20 injected process9 signatures10 44 Uses ipconfig to lookup or modify the Windows network settings 20->44 23 ipconfig.exe 20->23         started        process11 signatures12 46 Self deletion via cmd delete 23->46 48 Modifies the context of a thread in another process (thread injection) 23->48 50 Maps a DLL or memory area into another process 23->50 52 Tries to detect virtualization through RDTSC time measurements 23->52 26 cmd.exe 1 23->26         started        28 explorer.exe 2 151 23->28         started        process13 process14 30 conhost.exe 26->30         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/cb13b76515eda9a32e999b61c7e11e01de16ebeaf9ae6c503a1a0d238bc5bf37/
Threat name:
ByteCode-MSIL.Trojan.FormBook
Create hunting rule
Status:
Malicious
First seen:
2021-12-20 13:20:37 UTC
File Type:
PE (.Net Exe)
Extracted files:
16
AV detection:
20 of 27 (74.07%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=zmj3oziv5wu2gluztnq4pyi6ahpbn27k7gxgyub2digshc6fx43q._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
02a852aaa839120b0e557629b63a754cb302ebe2f11275d3e4fb68f4f1e70532
OskiStealer
0789b4aec138cf9c5bc3b01774fc8ed075dadf40c8ecf97058c201c9de22160e
OskiStealer
0fae331eb46ca1a2971d2d03cc3558e51f73c36d14b70dd731ce44f799c723ef
OskiStealer
125a3d1084a3f13ca811f5fbecdbade8d6e2b2c5d73a686674c6ff244ec99f68
OskiStealer
125c9498bdcd38fb36d35e3eb32f45ede843e53eeb57e973255cf11d66318210
OskiStealer
86844ad8d12c64adf220519349156fe12fbf9ccf1c14e929ac1e5ccabfd07e56
OskiStealer
8cacd20da785153237d5602e9fb15f7d18343b16e37dfbbf36b549e89a93378f
OskiStealer
ae371c388cd7f047ae61f852158fc5de2c7f5ab2bdda4b211b9fd87c7b6272dc
OskiStealer
ecc6439ff97e4b77f3af320e4c224f712478610fd28a1b6e6a03573c4b90f405
OskiStealer
+ 12'386 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:m1x9 rat spyware stealer trojan
Link:
https://tria.ge/reports/211220-sy682abad5/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Formbook Payload
Formbook
Unpacked files
SH256 hash:
217d023c1ce88ff81a11918437063a7c18eb3ba1a3a97e15a9abca2047a53696
MD5 hash:
7492ba85c9fe2c964c7fa7fd13c2eed3
SHA1 hash:
856e9f14d9d20b3a6bff691daf4a90e20e04d372
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/94f771d2-0e9f-418d-888e-5d8802868bf3/
Parent samples :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 hash:
cc863038dfc58d37276a1f1cb952870d6a2cd81a7ac72d3ed7021e5c5aa1c8f0
MD5 hash:
2c5570f3b591aa1fd57f5ec62ab89b76
SHA1 hash:
7a451b030d1acef0a149e333ba9df225fc5494d1
Link:
https://www.unpac.me/results/94f771d2-0e9f-418d-888e-5d8802868bf3/
SH256 hash:
da71db25f3d2cd320c2d174acc51347660864f1a8fa4e0b1a4fd1aed12233785
MD5 hash:
58499d1b22dd94749b0e5c8ce73697bb
SHA1 hash:
23a4d1288836b6493a5652b03190e90521d3ac7d
Link:
https://www.unpac.me/results/94f771d2-0e9f-418d-888e-5d8802868bf3/
SH256 hash:
cb13b76515eda9a32e999b61c7e11e01de16ebeaf9ae6c503a1a0d238bc5bf37
MD5 hash:
5b239035e20815d69bd18ecbc75d77ee
SHA1 hash:
2fe12228562a605948fb09cc80eb98e0dabf19cf
Link:
https://www.unpac.me/results/94f771d2-0e9f-418d-888e-5d8802868bf3/
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/cb13b76515eda9a32e999b61c7e11e01de16ebeaf9ae6c503a1a0d238bc5bf37

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
Create hunting rule
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

OskiStealer

Executable exe cb13b76515eda9a32e999b61c7e11e01de16ebeaf9ae6c503a1a0d238bc5bf37

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/1862603/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/215498/

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