MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c30ce79d7b5b0708dc03f1532fa89afd4efd732531cb557dc31fe63acd5bc1ce. 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 7 YARA File information Comments

SHA256 hash: c30ce79d7b5b0708dc03f1532fa89afd4efd732531cb557dc31fe63acd5bc1ce
SHA3-384 hash: 175c2b90f164346ceb37e392d9e24e8e04309366f9e13ba4d288ab849c5b0abb349c8a17d6db39b54f9f12cc218a596e
SHA1 hash: fd80f7e8e32661d5ec12e7a901f22a9ed82e17a7
MD5 hash: c2301b62539adcba29dcf6a3200bd017
humanhash: nevada-nitrogen-earth-network
File name:gunzipped.exe
Download: download sample
Signature OskiStealer
File size:421'112 bytes
First seen:2022-01-06 06:56:07 UTC
Last seen:2022-01-06 09:21:37 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 7fa974366048f9c551ef45714595665e (946 x Formbook, 398 x Loki, 261 x AgentTesla)
ssdeep 12288:FbLApCXc5WI7RV5f74tODdFI/ik2z9DNaGMrB7uu:F4vWIZf74tOCipuG+Bqu
Threatray 3'456 similar samples on MalwareBazaar
TLSH T14D9423D191CAE567EBA54A3299A3E735D8BE1F31188235470FE53F686E33340693F202
File icon (PE):PE icon
dhash icon e0c4a2a2a4bcbcf8 (9 x Loki, 5 x Formbook, 2 x NanoCore)
Reporter @abuse_ch
Tags:exe OskiStealer


Twitter
@abuse_ch
OskiStealer C2:
http://2.56.57.108/osk//6.jpg

Intelligence


File Origin
# of uploads :
2
# of downloads :
208
Origin country :
US US
Mail intelligence
No data
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
gunzipped.exe
Verdict:
Malicious activity
Analysis date:
2022-01-06 06:58:54 UTC
Tags:
installer

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Creating a file
Unauthorized injection to a recently created process
Reading critical registry keys
Creating a window
Delayed writing of the file
DNS request
–°reating synchronization primitives
Running batch commands
Creating a process with a hidden window
Using the Windows Management Instrumentation requests
Searching for the window
Stealing user critical data
Launching a tool to kill processes
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
75%
Tags:
overlay packed
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 Stealer Vidar
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
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)
Icon mismatch, binary includes an icon from a different legit application in order to fool users
Injects a PE file into a foreign processes
Machine Learning detection for sample
Multi AV Scanner detection for submitted file
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:
Threat name:
Win32.Trojan.SpyNoon
Status:
Malicious
First seen:
2022-01-06 04:48:51 UTC
File Type:
PE (Exe)
Extracted files:
4
AV detection:
30 of 43 (69.77%)
Threat level:
  5/5
Result
Malware family:
Score:
  10/10
Tags:
family:oski discovery infostealer spyware stealer suricata
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
Loads dropped DLL
Reads user/profile data of web browsers
Downloads MZ/PE file
Oski
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)
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://2.56.57.108/osk/
Unpacked files
SH256 hash:
991c7e96710f8a6d1256ce0828ec363b97cb6c696047082eb8dd064948fd758d
MD5 hash:
ddfb4102c41008c12094af7cd61705ea
SHA1 hash:
d77923572c9d5f71c19ff3b20a80384dbb6bb010
Detections:
win_oski_g0 win_oski_auto
SH256 hash:
1ad678e6faeb8f9233b40cdbf2ebccb15c827c711542097e0a5f0bddf6f293ac
MD5 hash:
773cf2b52cffe5acffd3dd754416b2ff
SHA1 hash:
bc1edb6b564f5255b6c291b509ffff50b4fec795
SH256 hash:
c30ce79d7b5b0708dc03f1532fa89afd4efd732531cb557dc31fe63acd5bc1ce
MD5 hash:
c2301b62539adcba29dcf6a3200bd017
SHA1 hash:
fd80f7e8e32661d5ec12e7a901f22a9ed82e17a7

Indicators Of Compromise (IOCs)


Below is a list of indicators of compromise (IOCs) associated with this malware samples.

IOCThreatFox Reference
http://2.56.57.108/osk//6.jpg https://threatfox.abuse.ch/ioc/291457
http://2.56.57.108/osk//1.jpg https://threatfox.abuse.ch/ioc/291458
http://2.56.57.108/osk//2.jpg https://threatfox.abuse.ch/ioc/291459
http://2.56.57.108/osk//3.jpg https://threatfox.abuse.ch/ioc/291460
http://2.56.57.108/osk//4.jpg https://threatfox.abuse.ch/ioc/291461
http://2.56.57.108/osk//5.jpg https://threatfox.abuse.ch/ioc/291462
http://2.56.57.108/osk//7.jpg https://threatfox.abuse.ch/ioc/291463

File information


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

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