MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 74a4c90b44c56630cef55f461b176b8200b5c86fd31b4fde52602a4c725f47fa. 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: 10
| SHA256 hash: | 74a4c90b44c56630cef55f461b176b8200b5c86fd31b4fde52602a4c725f47fa |
|---|---|
| SHA3-384 hash: | 8ec09d9d1534d0cfdc05b2f974dfa0a1c0560ce1f396e23a86f061042bcbdfba0a64f3d2ec785066115af86048c7b88e |
| SHA1 hash: | ce52152e4ed64e5ef4f9c34d9b62056bf0dd5afb |
| MD5 hash: | d06e8007f29254aa4401d33f3785d986 |
| humanhash: | sierra-sink-football-shade |
| File name: | Po____062032.pdf.exe |
| Download: | download sample |
| Signature | OskiStealer |
| File size: | 585'216 bytes |
| First seen: | 2021-06-03 05:53:10 UTC |
| Last seen: | 2021-06-03 06:54:13 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'748 x AgentTesla, 19'643 x Formbook, 12'245 x SnakeKeylogger) |
| ssdeep | 12288:YMEmM7AQD2zRBShglqYVeW8+wfOtvRyp1p/TGgJYFge:n+CS6qYYF+wfOvkGeYFg |
| Threatray | 175 similar samples on MalwareBazaar |
| TLSH | 32C4E121F2B48B8AE0185FB357359A000B743C537865D63D285A35FB44B2BE3266FA77 |
| Reporter |  GovCERT_CH |
| Tags: | exe OskiStealer |
Intelligence
File Origin
# of uploads :
2
# of downloads :
135
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Po____062032.pdf.exe
Verdict:
Malicious activity
Analysis date:
2021-06-03 05:56:05 UTC
Tags:
trojan stealer vidar
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Vidar
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.
Result
Threat name:
Oski Vidar
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
.NET source code contains potential unpacker
Found malware configuration
Found many strings related to Crypto-Wallets (likely being stolen)
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Multi AV Scanner detection for dropped file
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Sigma detected: Suspicious Double Extension
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses an obfuscated file name to hide its real file extension (double extension)
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AntiVM3
Yara detected Oski Stealer
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Threat name:
Win32.Trojan.AgentTesla
Status:
Malicious
First seen:
2021-06-03 05:54:10 UTC
AV detection:
7 of 46 (15.22%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Similar samples:
+ 165 additional samples on MalwareBazaar
Result
Malware family:
oski
Score:
10/10
Tags:
family:oski evasion infostealer
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Maps connected drives based on registry
Checks BIOS information in registry
Looks for VMWare Tools registry key
Looks for VirtualBox Guest Additions in registry
Oski
Malware Config
C2 Extraction:
195.133.40.97
Unpacked files
SH256 hash:
222893c89bc62d463068c2eb4e3396b3f9c7ab10b1ba60fa97ea4e8f424bbec9
MD5 hash:
e2cc69ceabfaf2b1f80ec37382f64524
SHA1 hash:
f142165909737d2c765ee8ae7b0280c61ffe5256
SH256 hash:
4346b1e7986afda5ee99f2ab78cbf5fba514e5a7359976bd2bf17cc814f4bd13
MD5 hash:
d6c0ca90be8b4553810c39bc8211ea20
SHA1 hash:
ab1bfa89a7904d727799d3f1d1cfaa01f30d613f
Detections:
win_oski_g0
win_oski_auto
SH256 hash:
5bede9eedf6ae6df5a9d587c116c9583b31474c159c2b53486b000093cb3fde6
MD5 hash:
072eeac61b35d3f09edee4ff4f80f52d
SHA1 hash:
696fd9905a47e526470c2e234fef32f1ec1b74ad
SH256 hash:
74a4c90b44c56630cef55f461b176b8200b5c86fd31b4fde52602a4c725f47fa
MD5 hash:
d06e8007f29254aa4401d33f3785d986
SHA1 hash:
ce52152e4ed64e5ef4f9c34d9b62056bf0dd5afb
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
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.
Malspam
Delivery method
Distributed via e-mail attachment
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