MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 6849e65e9ac20880fa99583b202ae710e0a3885cd72692a0c1b4d72aae109adf. 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


Intelligence 12 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 6849e65e9ac20880fa99583b202ae710e0a3885cd72692a0c1b4d72aae109adf
SHA3-384 hash: 58289f50792243a6c4a2baf3b09ba9c5440545b009e1ba8593c228920f91da48cc09e8ebab6dceb6d2130be5883164aa
SHA1 hash: a60ef301091f45cbe298d472a769fd84d000326a
MD5 hash: 41d5b4752d88f933fe6c16edb71c362b
humanhash: floor-yellow-glucose-kitten
File name:vbc.exe
Download: download sample
Signature OskiStealer
Create hunting rule
File size:328'394 bytes
First seen:2022-03-02 14:10:32 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 7fa974366048f9c551ef45714595665e (946 x Formbook, 398 x Loki, 261 x AgentTesla)
ssdeep 6144:rGiqYw4zDTcEW9BaqTMTjC/g+kgYFwjvvMM0ldtIc4fX44K8f:m4z1W9BakMy/gnLw0ldH4fo4Rf
Threatray 4'186 similar samples on MalwareBazaar
TLSH T1F7641267FB8157BBC6A40831163F6F38DB7EA69127ED6C1306899F2BDC36857841024B
File icon (PE):PE icon
dhash icon b2a89c96a2cada72 (2'283 x Formbook, 981 x Loki, 803 x AgentTesla)
Reporter Anonymous
Tags:exe OskiStealer

Intelligence

File Origin
# of uploads :
1
# of downloads :
222
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Vidar
Create hunting rule
Link:
https://www.capesandbox.com/analysis/246326/
Detection(s):
SecuriteInfo.com.Trojan.NSISX.Spy.Gen.2.204.24138.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Delayed writing of the file
Сreating synchronization primitives
Running batch commands
Creating a process with a hidden window
Using the Windows Management Instrumentation requests
Searching for the window
Creating a window
Creating a file in the %temp% directory
Creating a process from a recently created file
DNS request
Creating a file
Reading critical registry keys
Unauthorized injection to a recently created process
Stealing user critical data
Launching a tool to kill processes
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
control.exe overlay packed shell32.dll
Link:
https://www.filescan.io/uploads/621f7afadfdfa8501c7765a6/reports/2473f4e5-bdb6-433e-9fc6-b94ac5ba6046/overview
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
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/6634ec05-1ede-4b2a-8b87-32b12264f551
Result
Threat name:
Oski Stealer Vidar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/949157
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
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
Performs DNS queries to domains with low reputation
Posts data to a JPG file (protocol mismatch)
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
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:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 581648 Sample: vbc.exe Startdate: 02/03/2022 Architecture: WINDOWS Score: 100 42 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->42 44 Found malware configuration 2->44 46 Malicious sample detected (through community Yara rule) 2->46 48 8 other signatures 2->48 9 vbc.exe 18 2->9         started        process3 file4 34 C:\Users\user\AppData\...\sapgcexsov.exe, PE32 9->34 dropped 12 sapgcexsov.exe 9->12         started        process5 signatures6 50 Performs DNS queries to domains with low reputation 12->50 15 sapgcexsov.exe 196 12->15         started        process7 dnsIp8 36 tel9e.xyz 188.114.96.7, 49752, 80 CLOUDFLARENETUS European Union 15->36 26 C:\ProgramData\vcruntime140.dll, PE32 15->26 dropped 28 C:\ProgramData\sqlite3.dll, PE32 15->28 dropped 30 C:\ProgramData\softokn3.dll, PE32 15->30 dropped 32 4 other files (none is malicious) 15->32 dropped 38 Tries to harvest and steal browser information (history, passwords, etc) 15->38 40 Tries to steal Crypto Currency Wallets 15->40 20 cmd.exe 1 15->20         started        file9 signatures10 process11 process12 22 taskkill.exe 1 20->22         started        24 conhost.exe 20->24         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/6849e65e9ac20880fa99583b202ae710e0a3885cd72692a0c1b4d72aae109adf/
Threat name:
Win32.Trojan.FormBook
Create hunting rule
Status:
Malicious
First seen:
2022-03-02 14:11:12 UTC
File Type:
PE (Exe)
Extracted files:
4
AV detection:
19 of 27 (70.37%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=nbe6mxu2yieib6uzla5sakxhcdqkhcc424tjfigbwtlsvlqqtlpq._file
Verdict:
malicious
Similar samples:
2cb326bf23a15dfa548df0266743efffefe1cb91450b3146e03e72f51c2cf0d9
OskiStealer
315465247b59964f71a42cf8df90849e782e48dc18743b1386f8147e48526f86
OskiStealer
9b4952dc2d34aba59e87c0c185358a57acb0fd071d63fc2af6c6c9ae8952be37
OskiStealer
b8868eb87c7cb945704e2d0b8ec2ebdc890cd6df12f9ef0a7295582c7fd0cf1f
OskiStealer
becbc1b05321dc51b2e50fcbb6c2be8da96c2648bebc11638701a69f22b226d8
OskiStealer
d8454e6022d16c264f078c2a0b925dc70d08edd251dc6e86f1af4b24afd46bde
OskiStealer
+ 4'176 additional samples on MalwareBazaar
Result
Malware family:
oski
Create hunting rule
Score:
  10/10
Tags:
family:oski discovery infostealer spyware stealer suricata
Link:
https://tria.ge/reports/220302-rhadpagggr/
Behaviour
Checks processor information in registry
Kills process with taskkill
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
Accesses cryptocurrency files/wallets, possible credential harvesting
Checks installed software on the system
Checks computer location settings
Loads dropped DLL
Reads user/profile data of web browsers
Uses the VBS compiler for execution
Downloads MZ/PE file
Executes dropped EXE
Oski
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt) M2
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer HTTP POST Pattern
Malware Config
C2 Extraction:
http://tel9e.xyz
Unpacked files
SH256 hash:
3ef3a3f34ea57c7b96dbbf6484d447c5391b53d2d9cb89579f687794d899cee2
MD5 hash:
3914df7b55623736fd64ad969c8cd0b8
SHA1 hash:
855080052812e56c44e213e665074c576b3f7cec
Detections:
win_oski_g0
Create hunting rule
win_oski_auto
Create hunting rule
Link:
https://www.unpac.me/results/b3d901f0-a50a-4b32-b131-9d5e1c95fde7/
Parent samples :
d8454e6022d16c264f078c2a0b925dc70d08edd251dc6e86f1af4b24afd46bde
6849e65e9ac20880fa99583b202ae710e0a3885cd72692a0c1b4d72aae109adf
SH256 hash:
0aa0a12fe3fa63977a28ab157b9cc3351ae88604896534409881d6b1370938c4
MD5 hash:
ac51adcf4b4bc2710fbffdbb6a042c0f
SHA1 hash:
ac7815b22234e50602a7c2f0b78a823e8092b3bb
Link:
https://www.unpac.me/results/b3d901f0-a50a-4b32-b131-9d5e1c95fde7/
SH256 hash:
6849e65e9ac20880fa99583b202ae710e0a3885cd72692a0c1b4d72aae109adf
MD5 hash:
41d5b4752d88f933fe6c16edb71c362b
SHA1 hash:
a60ef301091f45cbe298d472a769fd84d000326a
Link:
https://www.unpac.me/results/b3d901f0-a50a-4b32-b131-9d5e1c95fde7/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/6849e65e9ac2/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.28
Link:
https://yomi.yoroi.company/submissions/6849e65e9ac20880fa99583b202ae710e0a3885cd72692a0c1b4d72aae109adf

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: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:Detects win.oski.

File information

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

Web download

OskiStealer

Executable exe 6849e65e9ac20880fa99583b202ae710e0a3885cd72692a0c1b4d72aae109adf

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/2070902/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/246326/

Comments