MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f7a423c9fd6cf87566b34d2dab352a81821ba3737864cc1abec2593429965300. 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: 12


Intelligence 12 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: f7a423c9fd6cf87566b34d2dab352a81821ba3737864cc1abec2593429965300
SHA3-384 hash: 37d37add498274e4f41696ad26a4a28c3440377e10aa7fc4f3a27294f10b6f0d16082b219701bf5997c75be1b50561fe
SHA1 hash: 3161a9358e4872c884f7c4940d571e41dce1b7c6
MD5 hash: 201f71b4df35b6e0c6bea254256f6bdb
humanhash: orange-magnesium-march-yellow
File name:201f71b4df35b6e0c6bea254256f6bdb.exe
Download: download sample
Signature OskiStealer
Create hunting rule
File size:416'768 bytes
First seen:2022-01-17 09:30:41 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 12288:LM2TSzYxAAPvOlJma33D4e2PMNAsvMWBA5Z+rRcmkRRRRRER:IXzmNwVD5SoMilkRRRRRER
Threatray 3'537 similar samples on MalwareBazaar
TLSH T19B94129B73C55B66DC608BFFA87133602BB962296833FA5EAC8791C61C57B424104F37
Reporter abuse_ch
Tags:exe OskiStealer

Intelligence

File Origin
# of uploads :
1
# of downloads :
217
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
201f71b4df35b6e0c6bea254256f6bdb.exe
Verdict:
Malicious activity
Analysis date:
2022-01-17 17:59:44 UTC
Tags:
trojan stealer vidar loader
Link:
https://app.any.run/tasks/4d9dd269-c074-44c2-b692-2b77945ef7fc

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Vidar
Create hunting rule
Link:
https://www.capesandbox.com/analysis/219785/
Detection(s):
SecuriteInfo.com.Trojan.Hosts.49477.30444.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
DNS request
Unauthorized injection to a recently created process
Creating a file
Reading critical registry keys
Delayed writing of the file
Сreating synchronization primitives
Running batch commands
Creating a process with a hidden window
Stealing user critical data
Launching a tool to kill processes
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated packed
Link:
https://www.filescan.io/uploads/61e5375dd32385db63fa4cf6/reports/7b835c25-be81-4a3d-93f2-81318c49ef35/overview
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:
Oski Stealer
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/b96e2461-3223-4366-a949-fda50193ca91
Result
Threat name:
Oski Stealer Vidar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/921704
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Downloads files with wrong headers with respect to MIME Content-Type
Found malware configuration
Found many strings related to Crypto-Wallets (likely being stolen)
Machine Learning detection for sample
Multi AV Scanner detection for submitted file
Posts data to a JPG file (protocol mismatch)
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Crypto Currency Wallets
Yara detected AntiVM3
Yara detected Oski Stealer
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Download SVG
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/f7a423c9fd6cf87566b34d2dab352a81821ba3737864cc1abec2593429965300/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2022-01-17 09:31:11 UTC
File Type:
PE (.Net Exe)
Extracted files:
5
AV detection:
21 of 28 (75.00%)
Threat level:
  5/5
Verdict:
malicious
Similar samples:
469bb0b552b4d40a4f7d1334f69c121826b2a0ff3eeab0b69b97f836818d97a2
OskiStealer
76d739008009934a9aacb4e62c3fa45d01d8a38320857f073c9a4db4e6046640
OskiStealer
9b4952dc2d34aba59e87c0c185358a57acb0fd071d63fc2af6c6c9ae8952be37
OskiStealer
aced60ae902ad2acddb74c078406a2f9d669609f6571505754d4b78e3b439305
OskiStealer
becbc1b05321dc51b2e50fcbb6c2be8da96c2648bebc11638701a69f22b226d8
OskiStealer
d9a8ff42d8a53247338920a5d7c8f2ecbb512d9e81334e68d1c54a6cc46c5351
OskiStealer
+ 3'527 additional samples on MalwareBazaar
Result
Malware family:
oski
Create hunting rule
Score:
  10/10
Tags:
family:oski discovery infostealer spyware stealer
Link:
https://tria.ge/reports/220117-lg25eshcc2/
Behaviour
Checks processor information in registry
Kills process with taskkill
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Accesses cryptocurrency files/wallets, possible credential harvesting
Checks installed software on the system
Deletes itself
Loads dropped DLL
Reads user/profile data of web browsers
Downloads MZ/PE file
Oski
Malware Config
C2 Extraction:
modexdeals.ir
Unpacked files
SH256 hash:
0deb2743990b60931b1e53860f7da5c569716ff1e33a74231fa8385012d112ba
MD5 hash:
919164a94f9234c991134a1e749ed52b
SHA1 hash:
e116fee480efabf5d9184764d7422557b0dbaed4
Detections:
win_oski_g0
Create hunting rule
win_oski_auto
Create hunting rule
Link:
https://www.unpac.me/results/4c78536a-33d8-4dd2-913b-16a149839d46/
Parent samples :
aced60ae902ad2acddb74c078406a2f9d669609f6571505754d4b78e3b439305
0cf47ee37fd8ac01c75b6ea18f80d2647df7dee7235e5e22891bc8b3e8587a28
ab65d6eee8d3fef8fa8709054023cc39a0ab2b532245f61681f3e318908e6357
f7a423c9fd6cf87566b34d2dab352a81821ba3737864cc1abec2593429965300
e2d736aa3991b4b9d09ec99401ea45bea6cc317f3470e2a71105f1aac46d1ff8
f4112faf7476b5132e97e1822ab118742924603900d01370ce0c66dfcbc1e41b
SH256 hash:
3f6e0154419d92bd651cd5fb59fcf6b8313e775365db5ed0da6eef3864be9da2
MD5 hash:
9fba763a6fd633496e58d818cf99eee6
SHA1 hash:
2a054262b15bbbe405e0820be6ccf67076f8fd73
Link:
https://www.unpac.me/results/4c78536a-33d8-4dd2-913b-16a149839d46/
SH256 hash:
505e2399f8ea8c7703d6eb618d704eacc73c2ca91cfbfca074d92bf1e518e3af
MD5 hash:
f01ecc839ff879e6f59ee20b213d404a
SHA1 hash:
22c0e4a35e9705a5b582b845fd9a58d58c999bd4
Link:
https://www.unpac.me/results/4c78536a-33d8-4dd2-913b-16a149839d46/
SH256 hash:
f7a423c9fd6cf87566b34d2dab352a81821ba3737864cc1abec2593429965300
MD5 hash:
201f71b4df35b6e0c6bea254256f6bdb
SHA1 hash:
3161a9358e4872c884f7c4940d571e41dce1b7c6
Link:
https://www.unpac.me/results/4c78536a-33d8-4dd2-913b-16a149839d46/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/f7a423c9fd6c/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/f7a423c9fd6cf87566b34d2dab352a81821ba3737864cc1abec2593429965300

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: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 f7a423c9fd6cf87566b34d2dab352a81821ba3737864cc1abec2593429965300

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/1970259/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/219785/

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