MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 78acc7d2e613bc812bb1234cb88b6516f957e7ef6980dd211fdbb9f4741f88cd. 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: 78acc7d2e613bc812bb1234cb88b6516f957e7ef6980dd211fdbb9f4741f88cd
SHA3-384 hash: 9155ac974ffadd01af940032b43e1a19bd31f95283f2866bedc5a05c6e9ae2d13142682db4e83eff0281d436dec59a49
SHA1 hash: 446bc903be6c1621b754722885d6c14c5e4fcdaf
MD5 hash: 4694fd43d8e4fa2e93266c9a93475ed9
humanhash: arkansas-quebec-princess-oregon
File name:4694fd43d8e4fa2e93266c9a93475ed9.exe
Download: download sample
Signature OskiStealer
Create hunting rule
File size:1'109'504 bytes
First seen:2021-12-07 15:42:33 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'740 x AgentTesla, 19'600 x Formbook, 12'241 x SnakeKeylogger)
ssdeep 24576:ag9B4sv4JsbgROMHwnIH+czt4Cvik8CtSE3FluhzYSkhYZoY5gSmkGG:T9sigArIH/ip+SE1ludMYZ7nJGG
Threatray 4'182 similar samples on MalwareBazaar
TLSH T1EA3512AC39A786CEC261937577AEC13002A67DB66513C26EE89A331F19337817933357
File icon (PE):PE icon
dhash icon b3b3333969693b3b (69 x Formbook, 63 x AgentTesla, 26 x Loki)
Reporter abuse_ch
Tags:exe OskiStealer

Intelligence

File Origin
# of uploads :
1
# of downloads :
169
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
4694fd43d8e4fa2e93266c9a93475ed9.exe
Verdict:
Malicious activity
Analysis date:
2021-12-07 19:37:54 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/ce03adaf-aea9-461b-bcbd-3d8af0e3dd93

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/212205/
Result
Verdict:
Malware
Maliciousness:

Behaviour
DNS request
Creating a window
Sending a custom TCP request
Unauthorized injection to a recently created process
Creating a file
Reading critical registry keys
Running batch commands
Creating a process with a hidden window
Stealing user critical data
Launching a tool to kill processes
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated packed
Link:
https://www.filescan.io/uploads/61af81094d8e6f3a5e174473/reports/7cc36a2f-9c1f-4085-9aa5-431cb05d6736/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/6834c262-b2c6-4bfb-bd2e-d9556234de7b
Result
Threat name:
Oski Vidar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/903283
Signature
.NET source code contains potential unpacker
Antivirus detection for URL or domain
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)
Machine Learning detection for sample
Multi AV Scanner detection for domain / URL
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
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 535762 Sample: 3vg1Ysoptt.exe Startdate: 07/12/2021 Architecture: WINDOWS Score: 100 37 Multi AV Scanner detection for domain / URL 2->37 39 Found malware configuration 2->39 41 Antivirus detection for URL or domain 2->41 43 11 other signatures 2->43 8 3vg1Ysoptt.exe 3 2->8         started        process3 file4 25 C:\Users\user\AppData\...\3vg1Ysoptt.exe.log, ASCII 8->25 dropped 45 Performs DNS queries to domains with low reputation 8->45 12 3vg1Ysoptt.exe 196 8->12         started        17 3vg1Ysoptt.exe 8->17         started        signatures5 process6 dnsIp7 35 oilproduce.xyz 104.21.88.14, 49754, 80 CLOUDFLARENETUS United States 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/78acc7d2e613bc812bb1234cb88b6516f957e7ef6980dd211fdbb9f4741f88cd/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-12-07 15:30:56 UTC
File Type:
PE (.Net Exe)
Extracted files:
27
AV detection:
22 of 28 (78.57%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=pcwmpuxgco6ick5renglrc3fc34vpz7pngan2ii73o47i5a7rdgq._file
Verdict:
malicious
Similar samples:
192f884438809d6fb01ae0c89c4ccd1fdae62d429e78bdbcc4ff4d28a54049af
OskiStealer
66a1b49f893976a60ca25813345ea54a5582acf7a5a0821c03cc45bcfc89b5c5
OskiStealer
6b869d8825516d0b977d48043d1d56d233de7b128074b068566dc33e0ff9fdb7
OskiStealer
b43dde5ca3d23d16af5bf34c522869dff9624a78be67dfc3acde5c81ef24d318
OskiStealer
b70f4075c4ce52960faacb101aac17a9cd734cbec86b6a9d63944e900420bde1
OskiStealer
e447edf7c703f03c3644f4d8b896974b7bfa59e7bc4036af5a800c7135dd09b0
OskiStealer
+ 4'172 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/211207-s5xyyabaaj/
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:
oilproduce.xyz
Unpacked files
SH256 hash:
772257fb406613ef9ee6a556afddb70c227e4f8f5669ed74853327f2d3bd9dc4
MD5 hash:
6e70d2d9ced0a929684233de67a0d068
SHA1 hash:
a5bf9dd67ead779fe95aaaf978532d23f80c69d4
Detections:
win_oski_g0
Create hunting rule
win_oski_auto
Create hunting rule
Link:
https://www.unpac.me/results/fa4f6467-b12d-4fa2-b4c3-d3380e62d34c/
Parent samples :
3d67ced8c8394bdc10e76835caea07dee4729e86bc665a970b6e1b5af6c33eaa
2e6bebcaaa746b7ab28bf74c49dc0b92b88f564f5b05d6cc414ea1d4aa5f10d4
78acc7d2e613bc812bb1234cb88b6516f957e7ef6980dd211fdbb9f4741f88cd
SH256 hash:
f87eb56c6f93277d2b48617c6abbf906da4ecf7eaa78cc6832203acdf56249b1
MD5 hash:
1b899e7ec1500ee0da523b94ac1644df
SHA1 hash:
a50e982a4e79ff1cb297c13ebedfdf300bc1e68b
Link:
https://www.unpac.me/results/fa4f6467-b12d-4fa2-b4c3-d3380e62d34c/
SH256 hash:
80855df0d7e7629d1f16cfecb7270f7db3ae6c1e32973803330862e531e69a53
MD5 hash:
2ee37952c40f8681eb58af6196d117da
SHA1 hash:
10f1c59089e1485b1440a47fbde89172dd000a29
Link:
https://www.unpac.me/results/fa4f6467-b12d-4fa2-b4c3-d3380e62d34c/
SH256 hash:
78acc7d2e613bc812bb1234cb88b6516f957e7ef6980dd211fdbb9f4741f88cd
MD5 hash:
4694fd43d8e4fa2e93266c9a93475ed9
SHA1 hash:
446bc903be6c1621b754722885d6c14c5e4fcdaf
Link:
https://www.unpac.me/results/fa4f6467-b12d-4fa2-b4c3-d3380e62d34c/
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/78acc7d2e613bc812bb1234cb88b6516f957e7ef6980dd211fdbb9f4741f88cd

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 78acc7d2e613bc812bb1234cb88b6516f957e7ef6980dd211fdbb9f4741f88cd

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/1862603/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/212205/

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