MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 dda5d47308c0ebcb2555cda19b4c05a88d633396909456b9ee5fcee42e197724. 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 YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: dda5d47308c0ebcb2555cda19b4c05a88d633396909456b9ee5fcee42e197724
SHA3-384 hash: 4cfe41ed9e1389d8247d8ffe04f89641005004fcbac0cfe1e78a7fcaf51eb2117b42d80ea5bfef9ed5209959568c47f8
SHA1 hash: e1e57a74e28d8016f074da9cda4b68ab04b1737f
MD5 hash: c7ab84a215a60e703e2906f68a1bae13
humanhash: earth-iowa-nuts-zulu
File name:c7ab84a215a60e703e2906f68a1bae13.exe
Download: download sample
Signature OskiStealer
Create hunting rule
File size:557'056 bytes
First seen:2021-10-12 10:15:06 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'742 x AgentTesla, 19'606 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 12288:8MkzW+vUdJ8GHOdE+aTi4CgaOJju1+MtPQRtIdSB:8LeXRuEjTiwJjuEPdB
Threatray 3'940 similar samples on MalwareBazaar
TLSH T1FCC402002B6BDE66C16E63FD504422F743B8792160DAEB0A7EC431F7DC633952ECA916
Reporter abuse_ch
Tags:exe OskiStealer

Intelligence

File Origin
# of uploads :
1
# of downloads :
174
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
c7ab84a215a60e703e2906f68a1bae13.exe
Verdict:
Malicious activity
Analysis date:
2021-10-12 10:33:22 UTC
Tags:
trojan stealer vidar loader
Link:
https://app.any.run/tasks/e32f290b-e981-47d9-985c-f0d9f2b8dad6

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/196900/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Launching a process
Creating a file in the %temp% directory
Delayed writing of the file
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated packed
Link:
https://www.filescan.io/uploads/616560371c2d58ba7403012a/reports/03903ad7-55da-4d07-8aba-4ffc735041b0/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/3f4b84cd-2580-45ef-bb11-654c1c4d06f6
Result
Threat name:
Oski
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/868535
Signature
.NET source code contains potential unpacker
Antivirus detection for URL or domain
Downloads files with wrong headers with respect to MIME Content-Type
Found malware configuration
Found many strings related to Crypto-Wallets (likely being stolen)
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
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
Yara detected AntiVM3
Yara detected Oski Stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 500963 Sample: buIKlB688e.exe Startdate: 12/10/2021 Architecture: WINDOWS Score: 100 37 Found malware configuration 2->37 39 Antivirus detection for URL or domain 2->39 41 Multi AV Scanner detection for submitted file 2->41 43 7 other signatures 2->43 8 buIKlB688e.exe 3 2->8         started        process3 file4 25 C:\Users\user\AppData\...\buIKlB688e.exe.log, ASCII 8->25 dropped 45 Performs DNS queries to domains with low reputation 8->45 12 buIKlB688e.exe 196 8->12         started        17 buIKlB688e.exe 8->17         started        signatures5 process6 dnsIp7 35 chrisproperties.xyz 195.133.18.140, 49749, 80 AS-REGRU Russian Federation 12->35 27 C:\ProgramData\vcruntime140.dll, PE32 12->27 dropped 29 C:\ProgramData\sqlite3.dll, PE32 12->29 dropped 31 C:\ProgramData\softokn3.dll, PE32 12->31 dropped 33 4 other files (none is malicious) 12->33 dropped 47 Tries to harvest and steal browser information (history, passwords, etc) 12->47 49 Tries to steal Crypto Currency Wallets 12->49 19 cmd.exe 1 12->19         started        file8 signatures9 process10 process11 21 taskkill.exe 1 19->21         started        23 conhost.exe 19->23         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/dda5d47308c0ebcb2555cda19b4c05a88d633396909456b9ee5fcee42e197724/
Threat name:
ByteCode-MSIL.Trojan.Zilla
Create hunting rule
Status:
Malicious
First seen:
2021-10-12 10:15:15 UTC
AV detection:
9 of 40 (22.50%)
Threat level:
  5/5
Verdict:
malicious
Similar samples:
024a5c3d369e1459332682cad7931a426722fdc2ec0950adc598e0227d0ef043
OskiStealer
1ad022fe6f175e63e599e94fcc39c0e909e4f733f34e290dd3a6ce9692aa2f33
OskiStealer
44aa270e4c081241057bad8c1d0ea5864087325f8e3209aa10747f108123f718
OskiStealer
4ee9983bc82214479876383c1caa6c1800df1d9d9bc733bf0be74150570b12d0
OskiStealer
5490a5cc380603d9f186201100008c79c6c32cd898cb963feffc5290521a9f3c
OskiStealer
5ffe71b977866248e55612e20cea0bf3ad51a50896443d791081f58b49cdc5df
OskiStealer
652ff7f52f0e2d6bdd5a0f36f4b24c4dafc8aab7d5236db91b77267650cdb140
OskiStealer
a03b45dabcaf812402454befd876b2eafbdf9e967f3bb01e66f33f3cabbdebd5
OskiStealer
a54ecc8d83199ee37e9af81592b4b3dbc037aaa14eba989f6dc0504a570bcc9c
OskiStealer
a870249216a9fd48fa38faf197c7cad48a16b1c1f0d17f98b9b5de4c1a1b7cfb
OskiStealer
+ 3'930 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/211012-mas4lscaeq/
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
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:
chrisproperties.xyz
Unpacked files
SH256 hash:
74103cacf863da311d870b1d9ad302298f65e5aa0b089ffce2c0b847c216cd5c
MD5 hash:
7be9bdad358b1e418db234108c5c7ee8
SHA1 hash:
f67f21e9940e5272c8074bd624b51bf3af87fd61
Link:
https://www.unpac.me/results/2149eb6b-9016-432a-b7ba-a548a1c2c3b9/
SH256 hash:
00b9621e080a99aa0219c3a636e85fdc2ded9a2fa63bb80502b27aaa084e406a
MD5 hash:
7e1d956806587ab34f28ddbdd94e068f
SHA1 hash:
1e80dd0dceaf84bb9c33766239a12137d43705f7
Detections:
win_oski_g0
Create hunting rule
win_oski_auto
Create hunting rule
Link:
https://www.unpac.me/results/2149eb6b-9016-432a-b7ba-a548a1c2c3b9/
Parent samples :
652ff7f52f0e2d6bdd5a0f36f4b24c4dafc8aab7d5236db91b77267650cdb140
dda5d47308c0ebcb2555cda19b4c05a88d633396909456b9ee5fcee42e197724
SH256 hash:
eda4d687b865aed0078ab87078de7d9722888b2d2af71c6fc0dcdc986ffb7567
MD5 hash:
12cf5402be16590c300b442a66e9ebc1
SHA1 hash:
0ea28394d301ca1ce840f039d2da62a5ce6d9334
Link:
https://www.unpac.me/results/2149eb6b-9016-432a-b7ba-a548a1c2c3b9/
SH256 hash:
dda5d47308c0ebcb2555cda19b4c05a88d633396909456b9ee5fcee42e197724
MD5 hash:
c7ab84a215a60e703e2906f68a1bae13
SHA1 hash:
e1e57a74e28d8016f074da9cda4b68ab04b1737f
Link:
https://www.unpac.me/results/2149eb6b-9016-432a-b7ba-a548a1c2c3b9/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/dda5d47308c0/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
vidar
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/dda5d47308c0ebcb2555cda19b4c05a88d633396909456b9ee5fcee42e197724

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.

Web download

OskiStealer

Executable exe dda5d47308c0ebcb2555cda19b4c05a88d633396909456b9ee5fcee42e197724

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/1655379/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/196900/

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