MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 38e25fba4b5448546fa9672ea70ac050a9524d624b84d92fa39f9a8bbe7efa6b. 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: 38e25fba4b5448546fa9672ea70ac050a9524d624b84d92fa39f9a8bbe7efa6b
SHA3-384 hash: 7c049e38aa53294a081c0829ff25515dbfdbee85ceddb3a7c4f8c1185bf51ddf2a3d2090b2af4ba083d7469eb127434c
SHA1 hash: 15f0cd293532f4e3c26065963178b5a63dc53288
MD5 hash: 294e24de08e09999462b0f337d4414f8
humanhash: eighteen-potato-victor-london
File name:imgh0482196.exe
Download: download sample
Signature OskiStealer
Create hunting rule
File size:763'392 bytes
First seen:2021-11-30 07:46:45 UTC
Last seen:2021-11-30 09:29:43 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'742 x AgentTesla, 19'607 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 12288:Z0nWLZ0ZH8NSYU0Qvrj8ODML2zcUaPLfuWXHkUSGq0Ygsv:KWLZ0ZHk5irjbFaruWXHkUSGq0Ygs
Threatray 4'074 similar samples on MalwareBazaar
TLSH T1CCF4D033604417B6F8A8D0B1F06608935F62A02292D537AE326DE5BF0BDD795C70FB5A
File icon (PE):PE icon
dhash icon f0f0f0f0f0f8f8f8 (4 x SnakeKeylogger, 2 x OskiStealer)
Reporter abuse_ch
Tags:exe OskiStealer


Avatar
abuse_ch
OskiStealer C2:
http://cubicatransport.net/6.jpg

Indicators Of Compromise (IOCs)

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

IOCThreatFox Reference
http://cubicatransport.net/6.jpg https://threatfox.abuse.ch/ioc/256347/
http://cubicatransport.net/1.jpg https://threatfox.abuse.ch/ioc/256348/
http://cubicatransport.net/2.jpg https://threatfox.abuse.ch/ioc/256349/
http://cubicatransport.net/3.jpg https://threatfox.abuse.ch/ioc/256350/
http://cubicatransport.net/4.jpg https://threatfox.abuse.ch/ioc/256351/
http://cubicatransport.net/5.jpg https://threatfox.abuse.ch/ioc/256352/
http://cubicatransport.net/7.jpg https://threatfox.abuse.ch/ioc/256353/

Intelligence

File Origin
# of uploads :
2
# of downloads :
178
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
imgh0482196.exe
Verdict:
Malicious activity
Analysis date:
2021-11-30 07:49:41 UTC
Tags:
trojan stealer vidar loader
Link:
https://app.any.run/tasks/115c3b34-49ae-4f8b-9e7b-347c7df485ad

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/209847/
Detection(s):
SecuriteInfo.com.UDS.Trojan-Spy.MSIL.Stealer.gen.23956.19180.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
DNS request
Сreating synchronization primitives
Launching a process
Creating a process with a hidden window
Unauthorized injection to a recently created process
Creating a file
Running batch commands
Launching a tool to kill processes
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
anti-vm obfuscated packed
Link:
https://www.filescan.io/uploads/61a5d6f8effcae2254f5465e/reports/b182d010-9b93-44ea-9f34-90fdad49599b/overview
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/15f8fd26-9c51-4209-b9d7-369d4f587d02
Result
Threat name:
Oski Vidar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/898497
Signature
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
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)
Posts data to a JPG file (protocol mismatch)
Sigma detected: Powershell Defender Exclusion
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 Vidar stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 530975 Sample: imgh0482196.exe Startdate: 30/11/2021 Architecture: WINDOWS Score: 100 36 Found malware configuration 2->36 38 Yara detected Oski Stealer 2->38 40 Yara detected AntiVM3 2->40 42 8 other signatures 2->42 8 imgh0482196.exe 2 2->8         started        process3 signatures4 44 Adds a directory exclusion to Windows Defender 8->44 11 imgh0482196.exe 196 8->11         started        16 powershell.exe 25 8->16         started        process5 dnsIp6 34 cubicatransport.net 148.163.121.41, 49738, 80 IOFLOODUS United States 11->34 26 C:\ProgramData\vcruntime140.dll, PE32 11->26 dropped 28 C:\ProgramData\sqlite3.dll, PE32 11->28 dropped 30 C:\ProgramData\softokn3.dll, PE32 11->30 dropped 32 4 other files (none is malicious) 11->32 dropped 46 Tries to harvest and steal browser information (history, passwords, etc) 11->46 48 Tries to steal Crypto Currency Wallets 11->48 18 cmd.exe 1 11->18         started        20 conhost.exe 16->20         started        file7 signatures8 process9 process10 22 taskkill.exe 1 18->22         started        24 conhost.exe 18->24         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/38e25fba4b5448546fa9672ea70ac050a9524d624b84d92fa39f9a8bbe7efa6b/
Threat name:
ByteCode-MSIL.Spyware.Noon
Create hunting rule
Status:
Malicious
First seen:
2021-11-30 07:47:16 UTC
File Type:
PE (.Net Exe)
Extracted files:
21
AV detection:
22 of 28 (78.57%)
Threat level:
  2/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=hdrf7oslkrefi35jm4xkocwakcuvetlcjocnsl5dt6nixpt67jvq._file
Verdict:
malicious
Similar samples:
192f884438809d6fb01ae0c89c4ccd1fdae62d429e78bdbcc4ff4d28a54049af
OskiStealer
4ee9983bc82214479876383c1caa6c1800df1d9d9bc733bf0be74150570b12d0
OskiStealer
66a1b49f893976a60ca25813345ea54a5582acf7a5a0821c03cc45bcfc89b5c5
OskiStealer
b43dde5ca3d23d16af5bf34c522869dff9624a78be67dfc3acde5c81ef24d318
OskiStealer
b70f4075c4ce52960faacb101aac17a9cd734cbec86b6a9d63944e900420bde1
OskiStealer
c17243e46ff224631e589c55642c3666e5c560715841e8b8ebdd511cb70da8dd
OskiStealer
+ 4'064 additional samples on MalwareBazaar
Result
Malware family:
oski
Create hunting rule
Score:
  10/10
Tags:
family:oski discovery infostealer spyware stealer
Link:
https://tria.ge/reports/211130-jmjtxshdf8/
Behaviour
Checks processor information in registry
Kills process with taskkill
Suspicious behavior: EnumeratesProcesses
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
Malware Config
C2 Extraction:
cubicatransport.net
Unpacked files
SH256 hash:
8c179fb91371179a1fb094aebfc45fa0e4f172c9f3b74bb5fcbacb4f1d0097d7
MD5 hash:
6169c5cbabbabf55ddc904fe99dc0346
SHA1 hash:
b54143f0a8bfc9b2b4cdd6f1204b7190b7f8d5f1
Link:
https://www.unpac.me/results/8382c4f3-1048-4517-8959-0f06bae54786/
SH256 hash:
b19104b568ca3ddccc2a8d3d10ecddb1ea240171e798dc3a486292cfa14b6365
MD5 hash:
7b0900da932f4ed9630d65b04422736d
SHA1 hash:
6fa340436e3a8e73ae2b3e911f861483183c68ef
Link:
https://www.unpac.me/results/8382c4f3-1048-4517-8959-0f06bae54786/
SH256 hash:
f70ea8995a6afe7a11b6d51000f20d1b8ced9afcb7724e5a639a1114ea5f7016
MD5 hash:
c6d59a0838e7652d082a05a376a21e99
SHA1 hash:
669c45337ce1ffb3627749185bbb136ac0d878de
Detections:
win_oski_g0
Create hunting rule
win_oski_auto
Create hunting rule
Link:
https://www.unpac.me/results/8382c4f3-1048-4517-8959-0f06bae54786/
SH256 hash:
38e25fba4b5448546fa9672ea70ac050a9524d624b84d92fa39f9a8bbe7efa6b
MD5 hash:
294e24de08e09999462b0f337d4414f8
SHA1 hash:
15f0cd293532f4e3c26065963178b5a63dc53288
Link:
https://www.unpac.me/results/8382c4f3-1048-4517-8959-0f06bae54786/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/38e25fba4b54/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/38e25fba4b5448546fa9672ea70ac050a9524d624b84d92fa39f9a8bbe7efa6b

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/209847/

Comments