MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 e608103988cf08ff222081097df51d1f5c57ef507e41e212e6769dfb17f58e36. 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: 9


Intelligence 9 IOCs 7 YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: e608103988cf08ff222081097df51d1f5c57ef507e41e212e6769dfb17f58e36
SHA3-384 hash: 31b1a7539a633f608bc2d18c715c2536e19703e3c52c484ea0633802e5d7fe6d9ace703e9a191d6636215d9a00358cd0
SHA1 hash: 3db7a5b5bfb012406785e734b71501896b299029
MD5 hash: 6ca97a88a9a094fcf70c42fdbb6a8cbe
humanhash: lemon-ack-lithium-paris
File name:IMGSpecificationsRFOfdp.scr.exe
Download: download sample
Signature OskiStealer
Create hunting rule
File size:481'792 bytes
First seen:2021-06-23 19:30:50 UTC
Last seen:2021-06-23 20:33:56 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'660 x AgentTesla, 19'469 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 12288:VubbaeuEF1xHPGFraGBOhuI4GO8nGuq8YC:ebDrGFr0znnGu9Y
Threatray 2 similar samples on MalwareBazaar
TLSH B7A45C2E1AF5AF7EF94AD2B710C54D201EA1ED61BDC9F80AB7BE1D511F10918EE03942
Reporter abuse_ch
Tags:exe OskiStealer


Avatar
abuse_ch
OskiStealer C2:
http://195.133.40.152/6.jpg

Indicators Of Compromise (IOCs)

Below is a list of indicators of compromise (IOCs) associated with this malware samples.

IOCThreatFox Reference
http://195.133.40.152/6.jpg https://threatfox.abuse.ch/ioc/152880/
http://195.133.40.152/1.jpg https://threatfox.abuse.ch/ioc/152881/
http://195.133.40.152/2.jpg https://threatfox.abuse.ch/ioc/152882/
http://195.133.40.152/3.jpg https://threatfox.abuse.ch/ioc/152883/
http://195.133.40.152/4.jpg https://threatfox.abuse.ch/ioc/152884/
http://195.133.40.152/5.jpg https://threatfox.abuse.ch/ioc/152885/
http://195.133.40.152/7.jpg https://threatfox.abuse.ch/ioc/152886/

Intelligence

File Origin
# of uploads :
2
# of downloads :
113
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
IMGSpecificationsRFOfdp.scr.exe
Verdict:
Suspicious activity
Analysis date:
2021-06-23 19:35:04 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/f9cac447-4a3c-40d8-8752-90d85ca3b794

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Variant.Bulz.530340.1427.12191.UNOFFICIAL
Create hunting rule

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.
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/27385382-f3e2-40a2-9cb1-b1831d0bb0d1
Result
Threat name:
Oski Vidar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/806836
Signature
Creates an undocumented autostart registry key
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 dropped file
Machine Learning detection for sample
Multi AV Scanner detection for submitted file
Posts data to a JPG file (protocol mismatch)
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
Writes to foreign memory regions
Yara detected Oski Stealer
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 439247 Sample: IMGSpecificationsRFOfdp.scr.exe Startdate: 23/06/2021 Architecture: WINDOWS Score: 100 43 Found malware configuration 2->43 45 Multi AV Scanner detection for submitted file 2->45 47 Yara detected Oski Stealer 2->47 49 7 other signatures 2->49 8 IMGSpecificationsRFOfdp.scr.exe 9 2->8         started        process3 file4 23 C:\Users\user\AppData\Roaming\...\cgym.exe, PE32 8->23 dropped 25 C:\Users\...\IMGSpecificationsRFOfdp.scr.exe, PE32 8->25 dropped 27 C:\Users\user\...\cgym.exe:Zone.Identifier, ASCII 8->27 dropped 29 2 other malicious files 8->29 dropped 51 Creates an undocumented autostart registry key 8->51 53 Writes to foreign memory regions 8->53 55 Injects a PE file into a foreign processes 8->55 12 IMGSpecificationsRFOfdp.scr.exe 193 8->12         started        signatures5 process6 dnsIp7 39 195.133.40.152, 49733, 80 SPD-NETTR Russian Federation 12->39 41 192.168.2.1 unknown unknown 12->41 31 C:\ProgramData\vcruntime140.dll, PE32 12->31 dropped 33 C:\ProgramData\sqlite3.dll, PE32 12->33 dropped 35 C:\ProgramData\softokn3.dll, PE32 12->35 dropped 37 4 other files (none is malicious) 12->37 dropped 57 Machine Learning detection for dropped file 12->57 59 Tries to harvest and steal browser information (history, passwords, etc) 12->59 61 Tries to steal Crypto Currency Wallets 12->61 17 cmd.exe 1 12->17         started        file8 signatures9 process10 process11 19 taskkill.exe 1 17->19         started        21 conhost.exe 17->21         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/e608103988cf08ff222081097df51d1f5c57ef507e41e212e6769dfb17f58e36/
Threat name:
ByteCode-MSIL.Downloader.Seraph
Create hunting rule
Status:
Malicious
First seen:
2021-06-23 19:31:15 UTC
AV detection:
18 of 46 (39.13%)
Threat level:
  3/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=4yebaomiz4ep6iraqeex35i5d5ofp32qpza6eexgo2o7wf7vry3a._file
Verdict:
unknown
Similar samples:
17eac9b848711f3464eb21c8690c40ea3adfab56a98fff0741c30740298600da
OskiStealer
7124d39ff6581badebf4f2714f66ad9ec85528217f489e6e83922bc75a6ba271
OskiStealer
Result
Malware family:
oski
Create hunting rule
Score:
  10/10
Tags:
family:oski discovery infostealer spyware stealer
Link:
https://tria.ge/reports/210623-hwjg3bfdfx/
Behaviour
Checks processor information in registry
Kills process with taskkill
Suspicious behavior: EnumeratesProcesses
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:
195.133.40.152
Unpacked files
SH256 hash:
5e09fc328551ab45b23a40b373eda8b6cc9d277fb2cd27f755095eac042496f7
MD5 hash:
6eeb2a4ec76cd2d6c80d0741695148be
SHA1 hash:
e54314f0aae4e1559f1c0a4a5c992c0d97655331
Detections:
win_oski_g0
Create hunting rule
win_oski_auto
Create hunting rule
Link:
https://www.unpac.me/results/19e9e635-bffb-452f-90d6-0d4b35d82a3f/
Parent samples :
e608103988cf08ff222081097df51d1f5c57ef507e41e212e6769dfb17f58e36
b9bacacd8c4ca9d0988463b02247e4508c912b0d18f20dbdb4132ddea7714c96
SH256 hash:
eca9125b43feccef3854008a4ba6f7fd5079584e4a72ed0d9f7bf9b62effeec8
MD5 hash:
aff6f065d0807c7b8ed989ee4ab0cc47
SHA1 hash:
9e2d44221d46a1f7b77927b320c6c9f3298802b8
Link:
https://www.unpac.me/results/19e9e635-bffb-452f-90d6-0d4b35d82a3f/
SH256 hash:
e98772721ed0c193013f232d5feba4bd232315733b12fb1aaaf1d7d595391fb5
MD5 hash:
6df9e982e9d209408bd562c905e9f823
SHA1 hash:
100430ce40cc344848027f0e45353307e16e28cf
Link:
https://www.unpac.me/results/19e9e635-bffb-452f-90d6-0d4b35d82a3f/
SH256 hash:
e608103988cf08ff222081097df51d1f5c57ef507e41e212e6769dfb17f58e36
MD5 hash:
6ca97a88a9a094fcf70c42fdbb6a8cbe
SHA1 hash:
3db7a5b5bfb012406785e734b71501896b299029
Link:
https://www.unpac.me/results/19e9e635-bffb-452f-90d6-0d4b35d82a3f/
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/e608103988cf08ff222081097df51d1f5c57ef507e41e212e6769dfb17f58e36

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:MALWARE_Win_Vidar
Create hunting rule
Author:ditekSHen
Description:Detects Vidar / ArkeiStealer
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:Vidar
Create hunting rule
Author:kevoreilly
Description:Vidar Payload
Rule name:win_oski_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:autogenerated rule brought to you by yara-signator

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Comments