MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 7d8720a816740e98db989e14ce75f99de9bbd25924fbbbaf7a8d0c783c612579. 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 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 7d8720a816740e98db989e14ce75f99de9bbd25924fbbbaf7a8d0c783c612579
SHA3-384 hash: 8305df083c7ed97ce47c246cb107d2a0ad4dc6207732a04f9511763a9766282f0837a797ca834845278d3baa347d0966
SHA1 hash: 2ef01ef9e16832deccdbbe7de74ebe708291753a
MD5 hash: 89369d305fe4500297c09d278f290921
humanhash: massachusetts-black-batman-mango
File name:89369d305fe4500297c09d278f290921.exe
Download: download sample
Signature OskiStealer
Create hunting rule
File size:421'888 bytes
First seen:2021-12-22 18:49:54 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:zz0Fmjpnad3qsXIkANG0AHXlr2+uA8Bu6I8FNibCsh0cutGG:n0FgnajXT+rAVrvuA+ImNibHh0ciGG
Threatray 3'369 similar samples on MalwareBazaar
TLSH T11C94123536B8AB3AD2F95BB3503856701776A5BA3426CB4CCDC038E73875B958782B13
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 :
238
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
9ac88b8b37773d454204b4442ad574b42b103cade900b6e95d0d26b5abd4503d.doc
Verdict:
Malicious activity
Analysis date:
2021-12-22 15:58:32 UTC
Tags:
exploit CVE-2017-11882 loader trojan stealer vidar
Link:
https://app.any.run/tasks/81bd76c0-1d66-4600-ba9f-64c8b640f3a2

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/215839/
Result
Verdict:
Malware
Maliciousness:

Behaviour
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:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
obfuscated packed
Link:
https://www.filescan.io/uploads/61c373618991ba72b3926560/reports/776b6240-8b97-4200-95aa-829c977a4a95/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/8b3e3673-53a8-48d4-89ed-274907e16111
Result
Threat name:
Oski Stealer Vidar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/911702
Signature
.NET source code contains potential unpacker
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
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/7d8720a816740e98db989e14ce75f99de9bbd25924fbbbaf7a8d0c783c612579/
Threat name:
ByteCode-MSIL.Trojan.Taskun
Create hunting rule
Status:
Malicious
First seen:
2021-12-22 18:50:11 UTC
File Type:
PE (.Net Exe)
Extracted files:
10
AV detection:
20 of 28 (71.43%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=pwdsbkawoqhjrw4ytykm45pztxu3xuszet53xl32rughqpdbev4q._file
Verdict:
malicious
Similar samples:
192f884438809d6fb01ae0c89c4ccd1fdae62d429e78bdbcc4ff4d28a54049af
OskiStealer
2483e3d38f1856bf14e1bd86692e4ac5b3f330a52166d7708fba883a6809595b
OskiStealer
33a271b57993a4279618294783f95d3634d0358b5030ea48cf9896475e3d8546
OskiStealer
66a1b49f893976a60ca25813345ea54a5582acf7a5a0821c03cc45bcfc89b5c5
OskiStealer
6b869d8825516d0b977d48043d1d56d233de7b128074b068566dc33e0ff9fdb7
OskiStealer
fc55c796977aaab2254fd98cd04595c9eab86f459f3288f5f33d8fc9f050fdc4
OskiStealer
+ 3'359 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/211222-xgyb1sfhd2/
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:
jessecoltd.ir
Unpacked files
SH256 hash:
b31f06ec13af6441364beddf75162fa2cd8de1a40a58e6d7c983589f7cfaabe5
MD5 hash:
2faa0de538893da35748154d54a41d43
SHA1 hash:
eca7eb7c479905b95d9e8dc579959594231cc4db
Link:
https://www.unpac.me/results/578544dc-12cb-452b-ae4b-f71d53824379/
SH256 hash:
becbc1b05321dc51b2e50fcbb6c2be8da96c2648bebc11638701a69f22b226d8
MD5 hash:
f6b589c57ed54d122c17eace179999e7
SHA1 hash:
712c69f3b4c46d3909f7251b9d2ad7675b00fccd
Detections:
win_oski_g0
Create hunting rule
win_oski_auto
Create hunting rule
Link:
https://www.unpac.me/results/578544dc-12cb-452b-ae4b-f71d53824379/
Parent samples :
2483e3d38f1856bf14e1bd86692e4ac5b3f330a52166d7708fba883a6809595b
fc55c796977aaab2254fd98cd04595c9eab86f459f3288f5f33d8fc9f050fdc4
33a271b57993a4279618294783f95d3634d0358b5030ea48cf9896475e3d8546
7d8720a816740e98db989e14ce75f99de9bbd25924fbbbaf7a8d0c783c612579
becbc1b05321dc51b2e50fcbb6c2be8da96c2648bebc11638701a69f22b226d8
SH256 hash:
55535d7416e19740ddca81496bcfb9ea7f4ec52735e01d43880f6359f92b63be
MD5 hash:
42c16475606875decc737cb31dfb2cbb
SHA1 hash:
28db67a9058bbebedbd28819bce871cdeb62f968
Link:
https://www.unpac.me/results/578544dc-12cb-452b-ae4b-f71d53824379/
SH256 hash:
7d8720a816740e98db989e14ce75f99de9bbd25924fbbbaf7a8d0c783c612579
MD5 hash:
89369d305fe4500297c09d278f290921
SHA1 hash:
2ef01ef9e16832deccdbbe7de74ebe708291753a
Link:
https://www.unpac.me/results/578544dc-12cb-452b-ae4b-f71d53824379/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/7d8720a81674/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/7d8720a816740e98db989e14ce75f99de9bbd25924fbbbaf7a8d0c783c612579

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 7d8720a816740e98db989e14ce75f99de9bbd25924fbbbaf7a8d0c783c612579

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/1907407/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/215839/

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