MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 3cabdecbde62bcbd0f3528e45decf78d85e1b1d827a9cd19bb3cc1371d0cacae. 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 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 3cabdecbde62bcbd0f3528e45decf78d85e1b1d827a9cd19bb3cc1371d0cacae
SHA3-384 hash: a25b676200d56f193a09f3921bcca81d62cb72753edb99f78e205ce334adb531951c1a1e679585efbec6aa373309d234
SHA1 hash: c91a4f5c04a324d771466336d01d7cf88dc98d71
MD5 hash: a9f3daff956a9c8c8c4a2d631a83b6fb
humanhash: enemy-eleven-grey-illinois
File name:a9f3daff956a9c8c8c4a2d631a83b6fb.exe
Download: download sample
Signature OskiStealer
Create hunting rule
File size:433'152 bytes
First seen:2021-06-24 12:51:51 UTC
Last seen:2021-06-24 13:55:03 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'657 x AgentTesla, 19'468 x Formbook, 12'206 x SnakeKeylogger)
ssdeep 6144:zOyCV6OiYItmoOVUyX0Y/DqYD9foL7QrHiJxo+LzSZC7YCy51Q8RjUF+EF1tF+:Sh6DoosJrqUoL6axajU0EztF+
Threatray 1'591 similar samples on MalwareBazaar
TLSH 51949A777665E42CD373C53D5402EA28BEA36E035CF2921A57C0B7FE0972285A976F02
Reporter abuse_ch
Tags:exe OskiStealer


Avatar
abuse_ch
OskiStealer C2:
http://178.175.148.251/6.jpg

Indicators Of Compromise (IOCs)

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

IOCThreatFox Reference
http://178.175.148.251/6.jpg https://threatfox.abuse.ch/ioc/153249/
http://178.175.148.251/1.jpg https://threatfox.abuse.ch/ioc/153250/
http://178.175.148.251/2.jpg https://threatfox.abuse.ch/ioc/153251/
http://178.175.148.251/3.jpg https://threatfox.abuse.ch/ioc/153252/
http://178.175.148.251/4.jpg https://threatfox.abuse.ch/ioc/153253/
http://178.175.148.251/5.jpg https://threatfox.abuse.ch/ioc/153254/
http://178.175.148.251/7.jpg https://threatfox.abuse.ch/ioc/153255/

Intelligence

File Origin
# of uploads :
2
# of downloads :
111
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
a9f3daff956a9c8c8c4a2d631a83b6fb.exe
Verdict:
Suspicious activity
Analysis date:
2021-06-24 12:53:09 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/d45026e1-19c3-4a69-abd9-da6bcb4b4641

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/168032/
Detection(s):
SecuriteInfo.com.Variant.Bulz.527413.15130.11034.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:
Generic Malware
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/b5f0407e-25e4-4bf1-9b42-f8ee4d7cfd71
Result
Threat name:
Oski
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/807475
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 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
Writes to foreign memory regions
Yara detected Oski Stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 439886 Sample: u0fC9Xo7H9.exe Startdate: 24/06/2021 Architecture: WINDOWS Score: 100 45 Found malware configuration 2->45 47 Multi AV Scanner detection for submitted file 2->47 49 Yara detected Oski Stealer 2->49 51 6 other signatures 2->51 8 u0fC9Xo7H9.exe 1 7 2->8         started        12 chrm.exe 2 2->12         started        14 chrm.exe 2 2->14         started        process3 file4 35 C:\Users\user\AppData\Roaming\...\chrm.exe, PE32 8->35 dropped 37 C:\Users\user\AppData\...\u0fC9Xo7H9.exe, PE32 8->37 dropped 39 C:\Users\user\...\chrm.exe:Zone.Identifier, ASCII 8->39 dropped 41 2 other malicious files 8->41 dropped 59 Writes to foreign memory regions 8->59 61 Injects a PE file into a foreign processes 8->61 16 u0fC9Xo7H9.exe 193 8->16         started        signatures5 process6 dnsIp7 43 178.175.148.251, 49737, 80 TRABIAMD Moldova Republic of 16->43 27 C:\ProgramData\vcruntime140.dll, PE32 16->27 dropped 29 C:\ProgramData\sqlite3.dll, PE32 16->29 dropped 31 C:\ProgramData\softokn3.dll, PE32 16->31 dropped 33 4 other files (none is malicious) 16->33 dropped 53 Machine Learning detection for dropped file 16->53 55 Tries to harvest and steal browser information (history, passwords, etc) 16->55 57 Tries to steal Crypto Currency Wallets 16->57 21 cmd.exe 1 16->21         started        file8 signatures9 process10 process11 23 taskkill.exe 1 21->23         started        25 conhost.exe 21->25         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/3cabdecbde62bcbd0f3528e45decf78d85e1b1d827a9cd19bb3cc1371d0cacae/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-06-21 23:42:34 UTC
AV detection:
22 of 29 (75.86%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=hsv55s66mk6l2dzvfdsf33hxrwc6dmoye6u42gn3htatohimvsxa._file
Verdict:
malicious
Similar samples:
0768e83e8d36f21ea90867dcf3935ee48795daf2e4a0017979e752b865c95d9e
OskiStealer
12f5634cd28b25f6dcde9a1d7902d64ab4ded48b50e06e4ec0f583e03a156125
OskiStealer
1860347130f68ba0d084750816ca0fc532b8647d89e36ff53c0355e73a46d332
OskiStealer
37f96df377557cad9bdb2caa4064bbf4dd862e935a64e1d802d445358695e15c
OskiStealer
3aeccf51ec935646a4987a1683d5dd8a251d171d326041282759753e371dff4f
OskiStealer
604e8bce3d31f5e04fe9622cedeb0696a69b9cb7f262a9bb33009ede20df100a
OskiStealer
916bd03b40de6bfa498311e3a70d3e98c50e8255fd413d446daab77951224856
OskiStealer
9b26547086a1489e5534452021694af3a565fe76926e671112be4852947a5d27
OskiStealer
c41aa6d6eeac57851b0a00a619609ed764072881b85b7dad25ac30f2856eda43
OskiStealer
cb24694242c1c1618678711184ab8abe6a1335d348f3549d2b568d99f793bf28
OskiStealer
+ 1'581 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/210624-zj1n35mh92/
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
Adds Run key to start application
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:
178.175.148.251
Unpacked files
SH256 hash:
d6ad346ff80d831b8e8525fb2767451e96aca216a0dcf91eb77f26415a646c78
MD5 hash:
f5b6d59237836c2ecbd8972387aeb9a1
SHA1 hash:
c9e1a7864a9eece75ecfe8c6495957137bc653f7
Link:
https://www.unpac.me/results/641e130c-3002-49f4-a342-09abdb140652/
SH256 hash:
5c7fecda5c08bbf8b88671301554caff50f7f0bae9ad58d154f2ad58cee73832
MD5 hash:
5d13c437e1966cad2c4763931f352368
SHA1 hash:
82455e9e3135ff6b080d76ad2fca4709145244d5
Detections:
win_oski_g0
Create hunting rule
win_oski_auto
Create hunting rule
Link:
https://www.unpac.me/results/641e130c-3002-49f4-a342-09abdb140652/
SH256 hash:
09ed79b6d42981767c4abff21ead135da2674a5ddf9e2e5103266d3f6687b4bb
MD5 hash:
54f5532e26fcd9d215919a5e93260bcd
SHA1 hash:
043d7504ebc14dc44c6a6f7d86e1b6539dd8678e
Link:
https://www.unpac.me/results/641e130c-3002-49f4-a342-09abdb140652/
SH256 hash:
3cabdecbde62bcbd0f3528e45decf78d85e1b1d827a9cd19bb3cc1371d0cacae
MD5 hash:
a9f3daff956a9c8c8c4a2d631a83b6fb
SHA1 hash:
c91a4f5c04a324d771466336d01d7cf88dc98d71
Link:
https://www.unpac.me/results/641e130c-3002-49f4-a342-09abdb140652/
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/3cabdecbde62bcbd0f3528e45decf78d85e1b1d827a9cd19bb3cc1371d0cacae

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: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/168032/

Comments