MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 44aa270e4c081241057bad8c1d0ea5864087325f8e3209aa10747f108123f718. 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: 13


Intelligence 13 IOCs 7 YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 44aa270e4c081241057bad8c1d0ea5864087325f8e3209aa10747f108123f718
SHA3-384 hash: d1a92ab2e3047a78e48c423dc4b9496f7d6cac88adb52efbf2d9276a72ff117253e65a42644215cca5a566bf7eced88e
SHA1 hash: f24a31707b2b0037adcc712b0d83541074f909d2
MD5 hash: 452e6c334e555629c538c4aa6b2adc26
humanhash: spaghetti-kansas-quebec-fish
File name:452E6C334E555629C538C4AA6B2ADC26.exe
Download: download sample
Signature OskiStealer
Create hunting rule
File size:811'008 bytes
First seen:2021-08-09 22:15:47 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'649 x AgentTesla, 19'461 x Formbook, 12'202 x SnakeKeylogger)
ssdeep 12288:YcaQxt8LiULbgDPwFVt2NjFhslyAz1+LC6oSU4Acp82cz8/mNMgMRyLcvyQQGSI:NGb0wFVMNjTsl9zwLCZGAa8mqaQeW
Threatray 2'431 similar samples on MalwareBazaar
TLSH T13605CF307AED6714E1BBEB740635610087F6F93BD716C74E2C25909C9A73B828B22F56
Reporter abuse_ch
Tags:exe OskiStealer


Avatar
abuse_ch
OskiStealer C2:
http://185.212.131.198/ww//6.jpg

Indicators Of Compromise (IOCs)

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

IOCThreatFox Reference
http://185.212.131.198/ww//6.jpg https://threatfox.abuse.ch/ioc/166417/
http://185.212.131.198/ww//1.jpg https://threatfox.abuse.ch/ioc/166418/
http://185.212.131.198/ww//2.jpg https://threatfox.abuse.ch/ioc/166419/
http://185.212.131.198/ww//3.jpg https://threatfox.abuse.ch/ioc/166420/
http://185.212.131.198/ww//4.jpg https://threatfox.abuse.ch/ioc/166421/
http://185.212.131.198/ww//5.jpg https://threatfox.abuse.ch/ioc/166422/
http://185.212.131.198/ww//7.jpg https://threatfox.abuse.ch/ioc/166423/

Intelligence

File Origin
# of uploads :
1
# of downloads :
141
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
SAMPLE_ORDER_.xls
Verdict:
Malicious activity
Analysis date:
2021-08-06 13:52:49 UTC
Tags:
macros macros-on-open maldoc-17 generated-doc loader trojan stealer vidar
Link:
https://app.any.run/tasks/5128b7b5-7733-4c81-af3d-4c0bc82b7b40

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/177768/
Detection(s):
SecuriteInfo.com.Variant.MSILHeracles.23608.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Launching a process
Creating a process with a hidden window
Creating a file
Deleting a recently created file
Replacing files
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:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/db5b0165-cd10-4820-9b81-8598e5adfbee
Result
Threat name:
Oski Vidar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/829749
Signature
Downloads files with wrong headers with respect to MIME Content-Type
Found malware configuration
Found many strings related to Crypto-Wallets (likely being stolen)
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Posts data to a JPG file (protocol mismatch)
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
Yara detected AntiVM3
Yara detected Oski Stealer
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 462180 Sample: bP5ndZMe78.exe Startdate: 10/08/2021 Architecture: WINDOWS Score: 100 45 Found malware configuration 2->45 47 Multi AV Scanner detection for dropped file 2->47 49 Multi AV Scanner detection for submitted file 2->49 51 9 other signatures 2->51 8 bP5ndZMe78.exe 7 2->8         started        process3 file4 27 C:\Users\user\AppData\...\BqppCjWADhQ.exe, PE32 8->27 dropped 29 C:\Users\...\BqppCjWADhQ.exe:Zone.Identifier, ASCII 8->29 dropped 31 C:\Users\user\AppData\Local\...\tmp9F5A.tmp, XML 8->31 dropped 33 C:\Users\user\AppData\...\bP5ndZMe78.exe.log, ASCII 8->33 dropped 53 Uses schtasks.exe or at.exe to add and modify task schedules 8->53 55 Injects a PE file into a foreign processes 8->55 12 bP5ndZMe78.exe 193 8->12         started        17 schtasks.exe 1 8->17         started        signatures5 process6 dnsIp7 43 185.212.131.198, 49724, 80 INTERNET-ITNL Germany 12->43 35 C:\ProgramData\vcruntime140.dll, PE32 12->35 dropped 37 C:\ProgramData\sqlite3.dll, PE32 12->37 dropped 39 C:\ProgramData\softokn3.dll, PE32 12->39 dropped 41 4 other files (none is malicious) 12->41 dropped 57 Tries to harvest and steal browser information (history, passwords, etc) 12->57 59 Tries to steal Crypto Currency Wallets 12->59 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/44aa270e4c081241057bad8c1d0ea5864087325f8e3209aa10747f108123f718/
Threat name:
ByteCode-MSIL.Spyware.AveMaria
Create hunting rule
Status:
Malicious
First seen:
2021-08-06 18:39:18 UTC
AV detection:
27 of 46 (58.70%)
Threat level:
  2/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=isvcodsmbajecbl3vwgb2dvfqzaioms7ryzatkqqor7rbajd64ma._file
Verdict:
malicious
Similar samples:
223dfd54929007ac23d6a20dbcf81a519a14f1c4061d23afcb761b75796042d2
OskiStealer
436651743894169dc9cd4c7ef01734420a5ce2d6dcaf57825197e0c756feeee9
OskiStealer
60d1297adb502d942493a794945336aea891d2c321476ef3349ac07726fca7c3
OskiStealer
69f41c2c444cd2147188d547c5edd6a4a8e2f238df52e1709dc7bb1066232ecc
OskiStealer
e5cfbeb6e53527b724d1a710c44dd7f86a0befadb35db2c81ee1ec9aafd12b40
OskiStealer
f85de586c3a33df88ebb5493c0bbcbd18c9f732e201c4c1604f2b2779976434e
OskiStealer
+ 2'421 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/210809-c6wr6k1nds/
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:
185.212.131.198/ww/
Unpacked files
SH256 hash:
aed00f82f1772e5a403cce9c1349202c8371e67ed9ef19a33cac0bf2a411f3c1
MD5 hash:
c273f926e2a29bd62cc8f27b569a0b2a
SHA1 hash:
e08d302cab3e11d776599a6b0537207fce6f9c51
Link:
https://www.unpac.me/results/40b6a302-9ee6-4151-aeee-e0f370f65eaa/
SH256 hash:
582c930ee00ec4ff47c473510e3ce0aa9379392d9031b3dbac6f9c45ffc95a37
MD5 hash:
1b2ea33b591a0acb442788b7d91b9db5
SHA1 hash:
a4ea3edc45ab13bdf9fa45705bafcc90139e4d4d
Detections:
win_oski_g0
Create hunting rule
win_oski_auto
Create hunting rule
Link:
https://www.unpac.me/results/40b6a302-9ee6-4151-aeee-e0f370f65eaa/
SH256 hash:
20af6cc5cd5ed66c50581b04c4d5419d5bc34c63efe0a3756a9d5202852c2c25
MD5 hash:
98cade8104117c90c82731aaa351cf29
SHA1 hash:
0dd1963dd7295ae015baf4a63d404c875b43298c
Link:
https://www.unpac.me/results/40b6a302-9ee6-4151-aeee-e0f370f65eaa/
SH256 hash:
44aa270e4c081241057bad8c1d0ea5864087325f8e3209aa10747f108123f718
MD5 hash:
452e6c334e555629c538c4aa6b2adc26
SHA1 hash:
f24a31707b2b0037adcc712b0d83541074f909d2
Link:
https://www.unpac.me/results/40b6a302-9ee6-4151-aeee-e0f370f65eaa/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/44aa270e4c08/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/44aa270e4c081241057bad8c1d0ea5864087325f8e3209aa10747f108123f718

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/177768/

Comments