MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 259a1e3d537f6e61c1683fe558a87e48da3ec44420cc0285da89c88bbf45375b. 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: 11
| SHA256 hash: | 259a1e3d537f6e61c1683fe558a87e48da3ec44420cc0285da89c88bbf45375b |
|---|---|
| SHA3-384 hash: | 198814ef6e53f83fec42d868df21c96f586983e7e675a688c113660b97caf9285eb1cda166b816ab54271f9698773fd0 |
| SHA1 hash: | b6afa4b4b2540b89e48b1468a9e3e347ac567056 |
| MD5 hash: | 528c56717b32a20c42b98eaf3f26cff5 |
| humanhash: | salami-quebec-avocado-massachusetts |
| File name: | RFQ-32986.exe |
| Download: | download sample |
| Signature | OskiStealer |
| File size: | 294'794 bytes |
| First seen: | 2021-07-23 06:41:49 UTC |
| Last seen: | 2021-08-10 12:36:48 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | b89f3af6e8726c625cba8a18b46cbaf3 (2 x AgentTesla, 2 x Formbook, 1 x OskiStealer) |
| ssdeep | 6144:PQBdjfLqTeInCsRXzm3z667uu2hj1W93l2ykFiJk9E:Ze2Dguu2h5W93fkFiJk9E |
| Threatray | 2'030 similar samples on MalwareBazaar |
| TLSH | T1DF54F19D3A0CF311E5818DF574C9F1EF0A917232704F61A3BBD52F9A5CBB6A88940C5A |
| dhash icon | 4f4f090d0d094f4f (1 x OskiStealer, 1 x AgentTesla) |
| Reporter |  abuse_ch |
| Tags: | exe OskiStealer |
Indicators Of Compromise (IOCs)
Below is a list of indicators of compromise (IOCs) associated with this malware samples.
| IOC | ThreatFox Reference |
|---|---|
| http://irkark.xyz/6.jpg | https://threatfox.abuse.ch/ioc/162244/ |
| http://irkark.xyz/1.jpg | https://threatfox.abuse.ch/ioc/162245/ |
| http://irkark.xyz/2.jpg | https://threatfox.abuse.ch/ioc/162246/ |
| http://irkark.xyz/3.jpg | https://threatfox.abuse.ch/ioc/162247/ |
| http://irkark.xyz/4.jpg | https://threatfox.abuse.ch/ioc/162248/ |
| http://irkark.xyz/5.jpg | https://threatfox.abuse.ch/ioc/162249/ |
| http://irkark.xyz/7.jpg | https://threatfox.abuse.ch/ioc/162250/ |
Intelligence
File Origin
# of uploads :
2
# of downloads :
135
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
RFQ-32986.exe
Verdict:
Malicious activity
Analysis date:
2021-07-23 06:44:38 UTC
Tags:
trojan stealer vidar loader
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Vidar
Detection(s):
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
Verdict:
Malicious
Result
Threat name:
Oski Vidar
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
Detected unpacking (changes PE section rights)
Detected unpacking (overwrites its own PE header)
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
Maps a DLL or memory area into another process
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
Posts data to a JPG file (protocol mismatch)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Crypto Currency Wallets
Yara detected Oski Stealer
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Threat name:
Win32.Infostealer.Generic
Status:
Suspicious
First seen:
2021-07-23 05:40:11 UTC
AV detection:
13 of 46 (28.26%)
Threat level:
5/5
Detection(s):
Malicious file
Verdict:
malicious
Similar samples:
+ 2'020 additional samples on MalwareBazaar
Result
Malware family:
oski
Score:
10/10
Tags:
family:oski discovery infostealer spyware stealer
Behaviour
Checks processor information in registry
Kills process with taskkill
Suspicious behavior: MapViewOfSection
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:
irkark.xyz
Unpacked files
SH256 hash:
5932dfa4f7a62cc46aa5264542267aa491c6c0caa090307f83550f1932ecbd2d
MD5 hash:
76aae79f8b5423de99ebc41fa7009368
SHA1 hash:
26034682913fe7a17a764a9db926f17061c73bc5
Detections:
win_oski_g0
win_oski_auto
SH256 hash:
259a1e3d537f6e61c1683fe558a87e48da3ec44420cc0285da89c88bbf45375b
MD5 hash:
528c56717b32a20c42b98eaf3f26cff5
SHA1 hash:
b6afa4b4b2540b89e48b1468a9e3e347ac567056
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
File information
The table below shows additional information about this malware sample such as delivery method and external references.
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