MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ab65d6eee8d3fef8fa8709054023cc39a0ab2b532245f61681f3e318908e6357. 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: 13


Intelligence 13 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: ab65d6eee8d3fef8fa8709054023cc39a0ab2b532245f61681f3e318908e6357
SHA3-384 hash: 4564c41403fe140f4dc0c4358cfc9b435de8e307ee36a0375a40bae9aa75f8637e7f6b0aebae3f4c5fa8585a1fcfd15c
SHA1 hash: 4a6b87a10d36aaae0c13868d43faf95f32014ab5
MD5 hash: 4ccf41724c4bb34e4c4cc22bc43eaf35
humanhash: snake-uniform-white-oklahoma
File name:4ccf41724c4bb34e4c4cc22bc43eaf35.exe
Download: download sample
Signature OskiStealer
Create hunting rule
File size:556'544 bytes
First seen:2022-01-13 15:31:58 UTC
Last seen:2022-01-13 18:21:46 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'742 x AgentTesla, 19'606 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 12288:okZkG+wdLHdBKFHFTyVmmtEhUcPp4ZqRdUuktS2hhnMAXJh0M:rx+wdzdeOmVhUcPp9gDEgF
Threatray 3'499 similar samples on MalwareBazaar
TLSH T140C4AE6C365075DFC82BCA728EA86C10AA617C77530BD207A053359D9A5E6E7CF206F3
Reporter abuse_ch
Tags:exe OskiStealer

Intelligence

File Origin
# of uploads :
2
# of downloads :
274
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
4ccf41724c4bb34e4c4cc22bc43eaf35.exe
Verdict:
Malicious activity
Analysis date:
2022-01-13 16:00:08 UTC
Tags:
trojan stealer vidar loader
Link:
https://app.any.run/tasks/cc322dc5-5f88-48b2-b554-452a583b665a

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/219074/
Detection(s):
SecuriteInfo.com.Trojan.Siggen16.32065.17336.333.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
DNS request
Sending a custom TCP request
Unauthorized injection to a recently created process
Creating a file
Running batch commands
Creating a process with a hidden window
Launching a tool to kill processes
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated packed
Link:
https://www.filescan.io/uploads/61e0460ae997359713e6bcce/reports/12be47cf-51a4-4d83-895b-7cb9bead848d/overview
Malware family:
Oski Stealer
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/1ae74eb1-2074-47d2-abeb-389750841f73
Result
Threat name:
Oski Stealer Vidar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/920227
Signature
.NET source code contains potential unpacker
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)
Injects a PE file into a foreign processes
Machine Learning detection for sample
Multi AV Scanner detection for domain / URL
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
behaviorgraph top1 signatures2 2 Behavior Graph ID: 552703 Sample: hf7r8jObwA.exe Startdate: 13/01/2022 Architecture: WINDOWS Score: 100 37 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->37 39 Multi AV Scanner detection for domain / URL 2->39 41 Found malware configuration 2->41 43 12 other signatures 2->43 8 hf7r8jObwA.exe 3 2->8         started        process3 file4 25 C:\Users\user\AppData\...\hf7r8jObwA.exe.log, ASCII 8->25 dropped 45 Injects a PE file into a foreign processes 8->45 12 hf7r8jObwA.exe 196 8->12         started        17 hf7r8jObwA.exe 8->17         started        signatures5 process6 dnsIp7 35 modexdeals.ir 104.21.62.142, 49779, 80 CLOUDFLARENETUS United States 12->35 27 C:\ProgramData\vcruntime140.dll, PE32 12->27 dropped 29 C:\ProgramData\sqlite3.dll, PE32 12->29 dropped 31 C:\ProgramData\softokn3.dll, PE32 12->31 dropped 33 4 other files (none is malicious) 12->33 dropped 47 Tries to harvest and steal browser information (history, passwords, etc) 12->47 49 Tries to steal Crypto Currency Wallets 12->49 19 cmd.exe 1 12->19         started        file8 signatures9 process10 process11 21 taskkill.exe 1 19->21         started        23 conhost.exe 19->23         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/ab65d6eee8d3fef8fa8709054023cc39a0ab2b532245f61681f3e318908e6357/
Threat name:
ByteCode-MSIL.Trojan.Taskun
Create hunting rule
Status:
Malicious
First seen:
2022-01-13 12:35:24 UTC
File Type:
PE (.Net Exe)
Extracted files:
9
AV detection:
19 of 28 (67.86%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=vns5n3xi2p7pr6uhbecuai6mhgqkwk2tejc7mfub6prrreeomnlq._file
Verdict:
malicious
Similar samples:
33a271b57993a4279618294783f95d3634d0358b5030ea48cf9896475e3d8546
OskiStealer
469bb0b552b4d40a4f7d1334f69c121826b2a0ff3eeab0b69b97f836818d97a2
OskiStealer
76d739008009934a9aacb4e62c3fa45d01d8a38320857f073c9a4db4e6046640
OskiStealer
9b4952dc2d34aba59e87c0c185358a57acb0fd071d63fc2af6c6c9ae8952be37
OskiStealer
aced60ae902ad2acddb74c078406a2f9d669609f6571505754d4b78e3b439305
OskiStealer
becbc1b05321dc51b2e50fcbb6c2be8da96c2648bebc11638701a69f22b226d8
OskiStealer
d9a8ff42d8a53247338920a5d7c8f2ecbb512d9e81334e68d1c54a6cc46c5351
OskiStealer
+ 3'489 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/220113-sypc8abbe2/
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/cb88d165-a782-42b9-a49e-dd1497795417/
Parent samples :
aced60ae902ad2acddb74c078406a2f9d669609f6571505754d4b78e3b439305
0cf47ee37fd8ac01c75b6ea18f80d2647df7dee7235e5e22891bc8b3e8587a28
ab65d6eee8d3fef8fa8709054023cc39a0ab2b532245f61681f3e318908e6357
f7a423c9fd6cf87566b34d2dab352a81821ba3737864cc1abec2593429965300
e2d736aa3991b4b9d09ec99401ea45bea6cc317f3470e2a71105f1aac46d1ff8
f4112faf7476b5132e97e1822ab118742924603900d01370ce0c66dfcbc1e41b
SH256 hash:
1102d76935981cede43a9b30cd969917b4497105d110107916f1fe561eae91a7
MD5 hash:
25d823ece88c612e86a8369b0c2aadc4
SHA1 hash:
7db8f463fc7a4e2d4a1850b5e1ff17983679fa89
Link:
https://www.unpac.me/results/cb88d165-a782-42b9-a49e-dd1497795417/
SH256 hash:
8e3f43195f05b5e7808cc41f5b1e05e156b67f9e413eaeec7bff9c70f49355b7
MD5 hash:
27418de0ef31c43aec1a7220a9c5888f
SHA1 hash:
1727982ed0a86125ac696b28d6c664138fed16b2
Link:
https://www.unpac.me/results/cb88d165-a782-42b9-a49e-dd1497795417/
SH256 hash:
ab65d6eee8d3fef8fa8709054023cc39a0ab2b532245f61681f3e318908e6357
MD5 hash:
4ccf41724c4bb34e4c4cc22bc43eaf35
SHA1 hash:
4a6b87a10d36aaae0c13868d43faf95f32014ab5
Link:
https://www.unpac.me/results/cb88d165-a782-42b9-a49e-dd1497795417/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/ab65d6eee8d3/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/ab65d6eee8d3fef8fa8709054023cc39a0ab2b532245f61681f3e318908e6357

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 ab65d6eee8d3fef8fa8709054023cc39a0ab2b532245f61681f3e318908e6357

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/1970259/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/219074/

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