MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 dd77e09b528cd9572298122d059a6041f3d4e91921a11bdbfaf57fe0c8339aef. 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: | dd77e09b528cd9572298122d059a6041f3d4e91921a11bdbfaf57fe0c8339aef |
|---|---|
| SHA3-384 hash: | 78a41d67d5614e9b750b996bfc45601710f3dbed68e7236708d6c54c2043dfe5ab11f07ce309aa5e7638ffd9eb760a7b |
| SHA1 hash: | bd6bc7e116af16697416d9ac98c74d8ecda00a82 |
| MD5 hash: | 87c8dfadd09d783b4ecb103cb755f968 |
| humanhash: | maine-eight-nebraska-california |
| File name: | DOCSX.scr.exe |
| Download: | download sample |
| Signature | OskiStealer |
| File size: | 1'030'144 bytes |
| First seen: | 2022-05-24 02:16:38 UTC |
| Last seen: | 2022-05-24 02:32:30 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger) |
| ssdeep | 24576:1orZTPyhIdQI4kKUpGzT5hhhhhhhhhhhhhh:6tTahG |
| Threatray | 4'206 similar samples on MalwareBazaar |
| TLSH | T1CA25122278B80D13C19D7F37DB4B682503328952AC36D22C2F4FB9C765749679E1BB26 |
| TrID | 69.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 9.9% (.EXE) Win64 Executable (generic) (10523/12/4) 6.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 4.7% (.EXE) Win16 NE executable (generic) (5038/12/1) 4.2% (.EXE) Win32 Executable (generic) (4505/5/1) |
| 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://lettingos.co.vu/1.jpg | https://threatfox.abuse.ch/ioc/628967/ |
| http://lettingos.co.vu/2.jpg | https://threatfox.abuse.ch/ioc/628968/ |
| http://lettingos.co.vu/3.jpg | https://threatfox.abuse.ch/ioc/628969/ |
| http://lettingos.co.vu/4.jpg | https://threatfox.abuse.ch/ioc/628970/ |
| http://lettingos.co.vu/5.jpg | https://threatfox.abuse.ch/ioc/628971/ |
| http://lettingos.co.vu/7.jpg | https://threatfox.abuse.ch/ioc/628972/ |
Intelligence
File Origin
# of uploads :
2
# of downloads :
272
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
DOCSX.scr.exe
Verdict:
Suspicious activity
Analysis date:
2022-05-24 02:20:35 UTC
Tags:
n/a
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Result
Verdict:
Malware
Maliciousness:
Behaviour
Adding an access-denied ACE
Launching a process
DNS request
Creating a file
Reading critical registry keys
Launching the default Windows debugger (dwwin.exe)
Stealing user critical data
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
cerbu control.exe obfuscated packed remote.exe vobfus
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
Result
Threat name:
Oski Stealer, Vidar
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Signature
C2 URLs / IPs found in malware configuration
Contains functionality to hide user accounts
DLL side loading technique detected
Downloads files with wrong headers with respect to MIME Content-Type
Found malware configuration
Found many strings related to Crypto-Wallets (likely being stolen)
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Posts data to a JPG file (protocol mismatch)
Snort IDS alert for network traffic
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 UAC Bypass using CMSTP
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Threat name:
ByteCode-MSIL.Trojan.Cerbu
Status:
Malicious
First seen:
2022-05-24 02:17:08 UTC
File Type:
PE (.Net Exe)
Extracted files:
17
AV detection:
10 of 41 (24.39%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Similar samples:
+ 4'196 additional samples on MalwareBazaar
Result
Malware family:
oski
Score:
10/10
Tags:
family:oski infostealer suricata
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Program crash
Suspicious use of SetThreadContext
Downloads MZ/PE file
Oski
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer HTTP POST Pattern
Malware Config
C2 Extraction:
lettingos.co.vu
Unpacked files
SH256 hash:
dd77e09b528cd9572298122d059a6041f3d4e91921a11bdbfaf57fe0c8339aef
MD5 hash:
87c8dfadd09d783b4ecb103cb755f968
SHA1 hash:
bd6bc7e116af16697416d9ac98c74d8ecda00a82
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.38
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: | BitcoinAddress |
|---|---|
| Author: | Didier Stevens (@DidierStevens) |
| Description: | Contains a valid Bitcoin address |
| Rule name: | MALWARE_Win_Vidar |
|---|---|
| Author: | ditekSHen |
| Description: | Detects Vidar / ArkeiStealer |
| Rule name: | pe_imphash |
|---|
| Rule name: | Skystars_Malware_Imphash |
|---|---|
| Author: | Skystars LightDefender |
| Description: | imphash |
| Rule name: | Vidar |
|---|---|
| Author: | kevoreilly |
| Description: | Vidar Payload |
| Rule name: | win_oski_auto |
|---|---|
| Author: | Felix Bilstein - yara-signator at cocacoding dot com |
| Description: | Detects win.oski. |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
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