MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 bef42b4bb33bf2edb112d4e084df6e7aaad37b429b00ac783b9fe14eb08ac3f6. 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
| SHA256 hash: | bef42b4bb33bf2edb112d4e084df6e7aaad37b429b00ac783b9fe14eb08ac3f6 |
|---|---|
| SHA3-384 hash: | 718c81446ea9b795e041f0c7fdfd4a74b1770ecd0a30199495645eb0d92e6f044482db2d2b97392f98d72f59a0c2c9c3 |
| SHA1 hash: | 47ad27a29e5d3c8449fe41287bc3957bb8c37aff |
| MD5 hash: | 8325e7768964ebee192622a378e7f28f |
| humanhash: | rugby-table-avocado-alpha |
| File name: | 8325e7768964ebee192622a378e7f28f.exe |
| Download: | download sample |
| Signature | OskiStealer |
| File size: | 764'928 bytes |
| First seen: | 2021-07-06 09:00:41 UTC |
| Last seen: | 2021-07-06 11:45:32 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'661 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger) |
| ssdeep | 12288:7MRC1P6NsBKfVoru+bXEaZzfmAaCNjb7YYelS6yZAM:7MRC1P6NlklIaZbmkTqlSd |
| Threatray | 1'666 similar samples on MalwareBazaar |
| TLSH | B4F47CB960764BA1EEBFC7380331251C4FADB37ED26BF6B85D94B18801D0F550A92927 |
| 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://37.0.11.237/nn//6.jpg | https://threatfox.abuse.ch/ioc/157866/ |
| http://37.0.11.237/nn//1.jpg | https://threatfox.abuse.ch/ioc/157867/ |
| http://37.0.11.237/nn//2.jpg | https://threatfox.abuse.ch/ioc/157868/ |
| http://37.0.11.237/nn//3.jpg | https://threatfox.abuse.ch/ioc/157869/ |
| http://37.0.11.237/nn//4.jpg | https://threatfox.abuse.ch/ioc/157870/ |
| http://37.0.11.237/nn//5.jpg | https://threatfox.abuse.ch/ioc/157871/ |
| http://37.0.11.237/nn//7.jpg | https://threatfox.abuse.ch/ioc/157872/ |
Intelligence
File Origin
# of uploads :
2
# of downloads :
160
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
8325e7768964ebee192622a378e7f28f.exe
Verdict:
Malicious activity
Analysis date:
2021-07-06 09:02:44 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
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.
Malware family:
Oski Stealer
Verdict:
Malicious
Result
Threat name:
Oski Vidar
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
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)
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
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:
ByteCode-MSIL.Trojan.AgentTesla
Status:
Malicious
First seen:
2021-07-06 05:40:29 UTC
AV detection:
8 of 46 (17.39%)
Threat level:
5/5
Detection(s):
Malicious file
Verdict:
malicious
Similar samples:
+ 1'656 additional samples on MalwareBazaar
Result
Malware family:
oski
Score:
10/10
Tags:
family:oski discovery evasion infostealer spyware stealer
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
Maps connected drives based on registry
Checks BIOS information in registry
Deletes itself
Loads dropped DLL
Reads user/profile data of web browsers
Downloads MZ/PE file
Looks for VMWare Tools registry key
Looks for VirtualBox Guest Additions in registry
Oski
Malware Config
C2 Extraction:
http://37.0.11.237/nn/
Unpacked files
SH256 hash:
6b51553ed8e2bfcaf3fff546d8a2a50830dcc6ab4d8a7359fc44b329cc93aafd
MD5 hash:
837791de6fbc6b55638d6fdd41f919ac
SHA1 hash:
8c1a02f6813429160cbe148a927c863e296daf55
Detections:
win_oski_g0
win_oski_auto
SH256 hash:
f6e016c3756a7f0e03cc65b36156b3804de927d4cb70f21945f43b81621fea70
MD5 hash:
8c33aa66daa181497f03fbac098a9ecf
SHA1 hash:
8fd177e905c4e03430024d6c71a52ba1806e22ce
SH256 hash:
5209992fd1f96cd1959efb5e1afa71f5c9ae2ab4430e258fe9d0ec915098d110
MD5 hash:
257ca10e5cbb2f8bdf0ae6f3e900e11e
SHA1 hash:
9d25ee80dbe3bbce5ab4479912c5e21b19b6aeec
SH256 hash:
bef42b4bb33bf2edb112d4e084df6e7aaad37b429b00ac783b9fe14eb08ac3f6
MD5 hash:
8325e7768964ebee192622a378e7f28f
SHA1 hash:
47ad27a29e5d3c8449fe41287bc3957bb8c37aff
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.51
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 |
|---|
| Rule name: | Skystars_Malware_Imphash |
|---|---|
| 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
Delivery method
Distributed via web download
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