MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c254079e9a75cb708e28deb9c72c77689c53425f8256338343c06285bed8ebbe. 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 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c254079e9a75cb708e28deb9c72c77689c53425f8256338343c06285bed8ebbe
SHA3-384 hash: 23b1c07116a7e7b2484f73028ea966bca8efffc068ee13d0813ec644526cc798529b6586832569464f748fa4dabf2c26
SHA1 hash: 475b8039046cc7283ee3495aa8abc879679a860b
MD5 hash: 0eab3ccc18c952cc89f73ba1a480070f
humanhash: hawaii-double-queen-grey
File name:Inquiry.exe
Download: download sample
Signature OskiStealer
Create hunting rule
File size:1'375'744 bytes
First seen:2021-08-16 09:45:51 UTC
Last seen:2021-08-16 10:54:20 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'740 x AgentTesla, 19'600 x Formbook, 12'241 x SnakeKeylogger)
ssdeep 24576:v2X1TrFY8blhBPHKFOoOxlVkqF2gZROak1FsGrQxQn9Y:OXpyQ1vxzxlPI6RE/Drh9
Threatray 2'597 similar samples on MalwareBazaar
TLSH T19F55E63916B82767E079D335A6E44417B3E09C5BB225ED5DB8CA37A70232F4265C323E
dhash icon e0f0f0d4f4f092cc (12 x AgentTesla, 3 x Formbook, 3 x SnakeKeylogger)
Reporter abuse_ch
Tags:exe OskiStealer


Avatar
abuse_ch
OskiStealer C2:
http://vtgtradings.com/6.jpg

Indicators Of Compromise (IOCs)

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

IOCThreatFox Reference
http://vtgtradings.com/6.jpg https://threatfox.abuse.ch/ioc/190108/
http://vtgtradings.com/1.jpg https://threatfox.abuse.ch/ioc/190109/
http://vtgtradings.com/2.jpg https://threatfox.abuse.ch/ioc/190110/
http://vtgtradings.com/3.jpg https://threatfox.abuse.ch/ioc/190111/
http://vtgtradings.com/4.jpg https://threatfox.abuse.ch/ioc/190112/
http://vtgtradings.com/5.jpg https://threatfox.abuse.ch/ioc/190113/
http://vtgtradings.com/7.jpg https://threatfox.abuse.ch/ioc/190114/

Intelligence

File Origin
# of uploads :
2
# of downloads :
163
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Inquiry.exe
Verdict:
Malicious activity
Analysis date:
2021-08-16 09:46:38 UTC
Tags:
trojan stealer vidar loader
Link:
https://app.any.run/tasks/1fb67c52-a989-4af6-b7ec-8c48f515a59a

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Vidar
Create hunting rule
Link:
https://www.capesandbox.com/analysis/179490/
Detection(s):
SecuriteInfo.com.generic.ml.2229.23593.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Creating a file in the %AppData% directory
Enabling the 'hidden' option for recently created files
Adding an access-denied ACE
Creating a file in the %temp% directory
Launching a process
Creating a process with a hidden window
Deleting a recently created file
Unauthorized injection to a recently created process
Creating a file
DNS request
Connection attempt
Reading critical registry keys
Replacing files
Delayed writing of the file
Running batch commands
Using the Windows Management Instrumentation requests
Searching for the window
Stealing user critical data
Launching a tool to kill processes
Enabling autorun by creating a file
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.
Malware family:
Oski Stealer
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/4d5ce151-259f-4311-926e-79294d545287
Result
Threat name:
Unknown
Detection:
malicious
Classification:
troj.spyw.evad
Score:
80 / 100
Link:
https://www.joesandbox.com/analysis/833419
Signature
.NET source code contains very large strings
Downloads files with wrong headers with respect to MIME Content-Type
Found many strings related to Crypto-Wallets (likely being stolen)
Injects a PE file into a foreign processes
Posts data to a JPG file (protocol mismatch)
Sigma detected: SAM Dump to AppData
Sigma detected: Suspicious PowerShell Invocations - Specific
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
Uses schtasks.exe or at.exe to add and modify task schedules
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 465848 Sample: Inquiry.exe Startdate: 16/08/2021 Architecture: WINDOWS Score: 80 41 Downloads files with wrong headers with respect to MIME Content-Type 2->41 43 Found many strings related to Crypto-Wallets (likely being stolen) 2->43 45 Posts data to a JPG file (protocol mismatch) 2->45 47 4 other signatures 2->47 8 Inquiry.exe 7 2->8         started        process3 file4 27 C:\Users\user\AppData\Local\...\tmpA7AE.tmp, XML 8->27 dropped 29 C:\Users\user\AppData\...\OhlPJGhIQFna.exe, PE32 8->29 dropped 49 Uses schtasks.exe or at.exe to add and modify task schedules 8->49 51 Injects a PE file into a foreign processes 8->51 12 Inquiry.exe 193 8->12         started        17 schtasks.exe 1 8->17         started        signatures5 process6 dnsIp7 39 vtgtradings.com 212.192.246.179, 49723, 80 RHC-HOSTINGGB Russian Federation 12->39 31 C:\ProgramData\vcruntime140.dll, PE32 12->31 dropped 33 C:\ProgramData\sqlite3.dll, PE32 12->33 dropped 35 C:\ProgramData\softokn3.dll, PE32 12->35 dropped 37 4 other files (none is malicious) 12->37 dropped 53 Tries to harvest and steal browser information (history, passwords, etc) 12->53 55 Tries to steal Crypto Currency Wallets 12->55 19 cmd.exe 1 12->19         started        21 conhost.exe 17->21         started        file8 signatures9 process10 process11 23 taskkill.exe 1 19->23         started        25 conhost.exe 19->25         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c254079e9a75cb708e28deb9c72c77689c53425f8256338343c06285bed8ebbe/
Threat name:
ByteCode-MSIL.Trojan.Generic
Create hunting rule
Status:
Suspicious
First seen:
2021-08-16 09:46:11 UTC
AV detection:
6 of 47 (12.77%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=yjkaphu2oxfxbdri3244oldxncofgqs7qjldha2dybrilpwy5o7a._file
Verdict:
malicious
Similar samples:
06c8a1e6544aede327bad32a5732d5bcfff143da73da01d34938efbe917e3289
OskiStealer
223dfd54929007ac23d6a20dbcf81a519a14f1c4061d23afcb761b75796042d2
OskiStealer
42c682af79cf1b73127ebf00349a8c4cabccdf42d2e14f77cda67121f870d8bf
OskiStealer
43460a1724b2521dd5e97c68c16edfce9caf22d49452efd956a64db91b5935a7
OskiStealer
44aa270e4c081241057bad8c1d0ea5864087325f8e3209aa10747f108123f718
OskiStealer
60d1297adb502d942493a794945336aea891d2c321476ef3349ac07726fca7c3
OskiStealer
a03b45dabcaf812402454befd876b2eafbdf9e967f3bb01e66f33f3cabbdebd5
OskiStealer
a34e7c63da647c394b8becde55d6e87bc34e2c934c89b7f23484747a3598fb4c
OskiStealer
+ 2'587 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/210816-dmy9avdbrx/
Behaviour
Checks processor information in registry
Creates scheduled task(s)
Kills process with taskkill
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
Deletes itself
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
Malware Config
C2 Extraction:
vtgtradings.com
Unpacked files
SH256 hash:
6912e4bedd1288f116e968f0a79d9797f6d6bd24d45a5f10c52e20f9d33b8c61
MD5 hash:
03bde4a82ad64c0f314985232fbca3fa
SHA1 hash:
e8d0b6339e94192eaaca32c812f914e60576dca6
Link:
https://www.unpac.me/results/4aff5727-e8f3-43c0-b629-1059b02b51a9/
SH256 hash:
c739e01f102821068447fe149763bcd16065759e8862bdeeb153d17f9a50a158
MD5 hash:
29ea51b6c84982a0531cd4a91f65cc50
SHA1 hash:
d73b2b0e7bb343c76531e8c5e2e221fd17fb581d
Link:
https://www.unpac.me/results/4aff5727-e8f3-43c0-b629-1059b02b51a9/
SH256 hash:
44b58b57c0e0658d979568b90de742f1fe1189dae463b992b8a9a2af70484914
MD5 hash:
297322a34a5ff581c6e31bdec8578ad4
SHA1 hash:
75b10b36b706e3a6eb309e597ab5b9c329c15207
Detections:
win_oski_g0
Create hunting rule
win_oski_auto
Create hunting rule
Link:
https://www.unpac.me/results/4aff5727-e8f3-43c0-b629-1059b02b51a9/
SH256 hash:
c254079e9a75cb708e28deb9c72c77689c53425f8256338343c06285bed8ebbe
MD5 hash:
0eab3ccc18c952cc89f73ba1a480070f
SHA1 hash:
475b8039046cc7283ee3495aa8abc879679a860b
Link:
https://www.unpac.me/results/4aff5727-e8f3-43c0-b629-1059b02b51a9/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/c254079e9a75/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/c254079e9a75cb708e28deb9c72c77689c53425f8256338343c06285bed8ebbe

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
Create hunting rule
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/179490/

Comments