MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 2efb273760c5f443d4fc9269ba66f258debf0d9c68ca5172a2d947a39fefe148. 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: 11


Intelligence 11 IOCs 7 YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 2efb273760c5f443d4fc9269ba66f258debf0d9c68ca5172a2d947a39fefe148
SHA3-384 hash: a05250ccac09a995abea65fd423022effcb279b742ddccc33bc6ddc32db7f9967313700dcee1691502873b5feae9d580
SHA1 hash: 36265c316c732d1f613d8225bcf09648c33db754
MD5 hash: 503d7a78644b7094745a8f28ad8127d0
humanhash: sweet-orange-kilo-fish
File name:36265c316c732d1f613d8225bcf09648c33db754.exe
Download: download sample
Signature OskiStealer
Create hunting rule
File size:286'049 bytes
First seen:2021-07-12 06:15:24 UTC
Last seen:2021-07-12 06:57:14 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 6e7f9a29f2c85394521a08b9f31f6275 (278 x GuLoader, 44 x RemcosRAT, 40 x VIPKeylogger)
ssdeep 6144:rMm4CCIGeKGDuGyGNvFaMTOX3Ks35V1XhZz2ZcWDuI0lO:rMwXFaMTEaO5RlAccXkO
Threatray 1'638 similar samples on MalwareBazaar
TLSH T1FC54F1853358D91BD2521B744E31B32A2779EE314850CACF73903F5FBD75B82681EA8A
Reporter abuse_ch
Tags:exe OskiStealer


Avatar
abuse_ch
OskiStealer C2:
http://boeinq.co/6.jpg

Indicators Of Compromise (IOCs)

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

IOCThreatFox Reference
http://boeinq.co/6.jpg https://threatfox.abuse.ch/ioc/159708/
http://boeinq.co/1.jpg https://threatfox.abuse.ch/ioc/159709/
http://boeinq.co/2.jpg https://threatfox.abuse.ch/ioc/159710/
http://boeinq.co/3.jpg https://threatfox.abuse.ch/ioc/159711/
http://boeinq.co/4.jpg https://threatfox.abuse.ch/ioc/159712/
http://boeinq.co/5.jpg https://threatfox.abuse.ch/ioc/159713/
http://boeinq.co/7.jpg https://threatfox.abuse.ch/ioc/159714/

Intelligence

File Origin
# of uploads :
2
# of downloads :
116
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
36265c316c732d1f613d8225bcf09648c33db754.exe
Verdict:
Malicious activity
Analysis date:
2021-07-12 06:16:24 UTC
Tags:
trojan stealer vidar loader
Link:
https://app.any.run/tasks/eeec0f9d-9b60-49a0-a771-6f7c6893b3e4

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/170897/
Detection(s):
SecuriteInfo.com.Trojan.GenericKD.46603152.12019.27102.UNOFFICIAL
Create hunting rule

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/9c1a365b-af72-4645-8d9f-a189025feec0
Result
Threat name:
Oski Vidar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/814539
Signature
Detected unpacking (changes PE section rights)
Detected unpacking (overwrites its own PE header)
Downloads files with wrong headers with respect to MIME Content-Type
Found malware configuration
Found many strings related to Crypto-Wallets (likely being stolen)
Machine Learning detection for dropped file
Machine Learning detection for sample
Maps a DLL or memory area into another process
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Posts data to a JPG file (protocol mismatch)
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:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 446949 Sample: JKkrGnVFcA.exe Startdate: 12/07/2021 Architecture: WINDOWS Score: 100 57 Found malware configuration 2->57 59 Multi AV Scanner detection for dropped file 2->59 61 Multi AV Scanner detection for submitted file 2->61 63 6 other signatures 2->63 8 dnhfs.exe 15 2->8         started        11 JKkrGnVFcA.exe 1 19 2->11         started        14 dnhfs.exe 15 2->14         started        process3 file4 65 Multi AV Scanner detection for dropped file 8->65 67 Detected unpacking (changes PE section rights) 8->67 69 Detected unpacking (overwrites its own PE header) 8->69 71 Machine Learning detection for dropped file 8->71 16 dnhfs.exe 193 8->16         started        47 C:\Users\user\AppData\Roaming\...\dnhfs.exe, PE32 11->47 dropped 73 Maps a DLL or memory area into another process 11->73 20 JKkrGnVFcA.exe 193 11->20         started        49 C:\Users\user\AppData\Local\Temp\diejc.dll, PE32 14->49 dropped 22 dnhfs.exe 23 14->22         started        signatures5 process6 dnsIp7 53 Tries to harvest and steal browser information (history, passwords, etc) 16->53 55 Tries to steal Crypto Currency Wallets 16->55 25 cmd.exe 16->25         started        51 boeinq.co 192.64.118.106, 49733, 49745, 49749 NAMECHEAP-NETUS United States 20->51 27 cmd.exe 1 20->27         started        39 C:\ProgramData\vcruntime140.dll, PE32 22->39 dropped 41 C:\ProgramData\sqlite3.dll, PE32 22->41 dropped 43 C:\ProgramData\softokn3.dll, PE32 22->43 dropped 45 4 other files (none is malicious) 22->45 dropped 29 WerFault.exe 22->29         started        file8 signatures9 process10 process11 31 conhost.exe 25->31         started        33 taskkill.exe 25->33         started        35 taskkill.exe 1 27->35         started        37 conhost.exe 27->37         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/2efb273760c5f443d4fc9269ba66f258debf0d9c68ca5172a2d947a39fefe148/
Threat name:
Win32.Trojan.Tnega
Create hunting rule
Status:
Malicious
First seen:
2021-07-09 00:05:00 UTC
AV detection:
20 of 29 (68.97%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=f35son3ayx2ehvh4sju3uzxsldpl6dm4ndffc4vc3fd2hh7p4fea._file
Verdict:
malicious
Similar samples:
017c0459b56b7e178721e18438dc793bbf2cd6cfe14481716a62441efcda3f0c
OskiStealer
1ce5b91643307f66c3ea30d45e7e8f5f686a850fc6687539b18bc594a1d4ecba
OskiStealer
3c66ae164f1823585301787debf4ac1a78eeff71ce7dd70f5b6e3ff8b50e7555
OskiStealer
42ca09428f55c746db7b893f0ae4abdd56343e6aa37e59b482d82039841ab4c3
OskiStealer
4f1bded2f0d6d077f672506e9a3ab5f4021a0a1a579e0b00d2773cd44199b813
OskiStealer
6b10d3c8721e6d9159f63ef4373ac02759c686a7a274d098c34829cfc2bdf8ad
OskiStealer
827a8b72cc614c417de4dadb9afcc2f89999c38774ae808b8297929aeaf5aa97
OskiStealer
a880e6f25d99f5bebe3ef7becdc1d1c0496c4dbd5502233bd4d1f173f753e00f
OskiStealer
e0d22b336dbaf83cab6789c39802c8a0c2739b1642c1834265c621493212819b
OskiStealer
+ 1'628 additional samples on MalwareBazaar
Result
Malware family:
oski
Create hunting rule
Score:
  10/10
Tags:
family:oski discovery infostealer persistence spyware stealer
Link:
https://tria.ge/reports/210712-6x6cfsb4nj/
Behaviour
Checks processor information in registry
Kills process with taskkill
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Accesses cryptocurrency files/wallets, possible credential harvesting
Adds Run key to start application
Checks installed software on the system
Loads dropped DLL
Reads user/profile data of web browsers
Downloads MZ/PE file
Oski
Malware Config
C2 Extraction:
http://boeinq.co
Unpacked files
SH256 hash:
bfadf1877cc8762977eb93aeb4aae19cb1d9fb43774e24db6546f16161bf9192
MD5 hash:
a856d87e47bf807b0429f236393eb15b
SHA1 hash:
56999ce3073aafe171f9060964597545ef294b9f
Link:
https://www.unpac.me/results/f42db9be-7e8b-42bf-8c03-995cb89fa133/
SH256 hash:
f058c17c307f444bf95754c7cb47a17a8abef74d24943d3905bab5c58df38862
MD5 hash:
ffccaadd41688bd1bd41d3a5cdb5eda5
SHA1 hash:
1a9ff6e72b413adf78c088bc6c9ab80657d75ac8
Detections:
win_oski_g0
Create hunting rule
win_oski_auto
Create hunting rule
Link:
https://www.unpac.me/results/f42db9be-7e8b-42bf-8c03-995cb89fa133/
SH256 hash:
2efb273760c5f443d4fc9269ba66f258debf0d9c68ca5172a2d947a39fefe148
MD5 hash:
503d7a78644b7094745a8f28ad8127d0
SHA1 hash:
36265c316c732d1f613d8225bcf09648c33db754
Link:
https://www.unpac.me/results/f42db9be-7e8b-42bf-8c03-995cb89fa133/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.77
Link:
https://yomi.yoroi.company/submissions/2efb273760c5f443d4fc9269ba66f258debf0d9c68ca5172a2d947a39fefe148

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:MALWARE_Win_Vidar
Create hunting rule
Author:ditekSHen
Description:Detects Vidar / ArkeiStealer
Rule name:Vidar
Create hunting rule
Author:kevoreilly
Description:Vidar Payload
Rule name:win_oski_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.oski.

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/170897/

Comments