MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 dc67579f0bd76303b5133e1daaf9c576dd4f3f429ed41a9b0af2dd45736685de. 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 4 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: dc67579f0bd76303b5133e1daaf9c576dd4f3f429ed41a9b0af2dd45736685de
SHA3-384 hash: 939d3eb1ab8da30c65cccc5dae29ca4d7fde011e2037935e4fcb067bfce1d555ec146b75a4af82ccf034ff74c850e462
SHA1 hash: 8c27f182636991e7adfb72b711cb352d4150d067
MD5 hash: 48c37718c16d20e45ae78d3755440aa5
humanhash: south-ink-ceiling-cup
File name:48c37718c16d20e45ae78d3755440aa5
Download: download sample
Signature OskiStealer
Create hunting rule
File size:372'224 bytes
First seen:2021-09-06 19:47:33 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'657 x AgentTesla, 19'469 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 6144:QxlOAksTASRUubMF3zoqzhBzqMzDzzufa/F7Z5KFMR7:cms/RfbC3zoqzhBzqMzDzzui/FO6R
Threatray 429 similar samples on MalwareBazaar
TLSH T11A846BB768DC399EF2044F72C3999277DDABF680470F77B13B603F81A9546714A0A988
Reporter zbetcheckin
Tags:32 exe OskiStealer

Indicators Of Compromise (IOCs)

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

IOCThreatFox Reference
http://aaaonyisi.xyz/6.jpg https://threatfox.abuse.ch/ioc/216779/
http://aaaonyisi.xyz/1.jpg https://threatfox.abuse.ch/ioc/216780/
http://aaaonyisi.xyz/2.jpg https://threatfox.abuse.ch/ioc/216781/
http://aaaonyisi.xyz/3.jpg https://threatfox.abuse.ch/ioc/216782/
http://aaaonyisi.xyz/4.jpg https://threatfox.abuse.ch/ioc/216783/
http://aaaonyisi.xyz/5.jpg https://threatfox.abuse.ch/ioc/216784/
http://aaaonyisi.xyz/7.jpg https://threatfox.abuse.ch/ioc/216785/

Intelligence

File Origin
# of uploads :
1
# of downloads :
159
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
48c37718c16d20e45ae78d3755440aa5
Verdict:
Malicious activity
Analysis date:
2021-09-06 19:50:40 UTC
Tags:
trojan stealer vidar loader phishing
Link:
https://app.any.run/tasks/50287fca-92ce-4bc1-9148-0043851f7a1f

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/185718/
Detection(s):
SecuriteInfo.com.Trojan.GenericKD.46922956.18841.31882.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a custom TCP request
Sending a UDP request
Running batch commands
Creating a process with a hidden window
Using the Windows Management Instrumentation requests
Unauthorized injection to a recently created process
Creating a file
DNS request
Connection attempt
Deleting a recently created file
Reading critical registry keys
Replacing files
Delayed writing of the file
Searching for the window
Stealing user critical data
Launching a tool to kill processes
Enabling autorun by creating a file
Malware family:
Oski Stealer
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/83d40895-b6a1-42d3-a61d-e10e7783d4cb
Result
Threat name:
Oski Vidar
Create hunting rule
Detection:
malicious
Classification:
troj.adwa.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/846116
Signature
.NET source code contains potential unpacker
Downloads files with wrong headers with respect to MIME Content-Type
Drops PE files to the startup folder
Found malware configuration
Found many strings related to Crypto-Wallets (likely being stolen)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
Posts data to a JPG file (protocol mismatch)
Sigma detected: Suspicious Script Execution From Temp Folder
Sigma detected: WScript or CScript Dropper
Suspicious powershell command line found
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: 478547 Sample: gLGwm0HdJW Startdate: 06/09/2021 Architecture: WINDOWS Score: 100 92 Found malware configuration 2->92 94 Multi AV Scanner detection for dropped file 2->94 96 Multi AV Scanner detection for submitted file 2->96 98 9 other signatures 2->98 11 gLGwm0HdJW.exe 4 2->11         started        13 gLGwm0HdJW.exe 3 2->13         started        process3 file4 16 cmd.exe 1 11->16         started        19 cmd.exe 3 11->19         started        72 C:\Users\user\AppData\...\gLGwm0HdJW.exe.log, ASCII 13->72 dropped 22 gLGwm0HdJW.exe 196 13->22         started        25 gLGwm0HdJW.exe 13->25         started        27 gLGwm0HdJW.exe 13->27         started        process5 dnsIp6 82 Suspicious powershell command line found 16->82 29 powershell.exe 17 16->29         started        31 wscript.exe 16->31         started        33 conhost.exe 16->33         started        35 timeout.exe 1 16->35         started        68 C:\Users\user\AppData\...\gLGwm0HdJW.exe, PE32 19->68 dropped 70 C:\Users\...\gLGwm0HdJW.exe:Zone.Identifier, ASCII 19->70 dropped 84 Drops PE files to the startup folder 19->84 37 conhost.exe 19->37         started        74 aaaonyisi.xyz 104.21.47.28, 49707, 80 CLOUDFLARENETUS United States 22->74 76 192.168.2.1 unknown unknown 22->76 86 Tries to steal Crypto Currency Wallets 22->86 39 cmd.exe 22->39         started        file7 signatures8 process9 process10 41 gLGwm0HdJW.exe 29->41         started        43 conhost.exe 39->43         started        45 taskkill.exe 39->45         started        process11 47 gLGwm0HdJW.exe 41->47         started        52 gLGwm0HdJW.exe 41->52         started        dnsIp12 78 aaaonyisi.xyz 47->78 80 172.67.144.40, 49713, 80 CLOUDFLARENETUS United States 47->80 60 C:\ProgramData\vcruntime140.dll, PE32 47->60 dropped 62 C:\ProgramData\sqlite3.dll, PE32 47->62 dropped 64 C:\ProgramData\softokn3.dll, PE32 47->64 dropped 66 4 other files (none is malicious) 47->66 dropped 88 Tries to harvest and steal browser information (history, passwords, etc) 47->88 90 Tries to steal Crypto Currency Wallets 47->90 54 cmd.exe 47->54         started        file13 signatures14 process15 process16 56 conhost.exe 54->56         started        58 taskkill.exe 54->58         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/dc67579f0bd76303b5133e1daaf9c576dd4f3f429ed41a9b0af2dd45736685de/
Threat name:
ByteCode-MSIL.Trojan.Chapak
Create hunting rule
Status:
Malicious
First seen:
2021-09-03 18:07:02 UTC
File Type:
PE (.Net Exe)
Extracted files:
3
AV detection:
20 of 43 (46.51%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=3rtvphyl25rqhnithyo2v6ofo3ou6p2ct3kbvgyk6louk43gqxpa._file
Verdict:
malicious
Similar samples:
21ba0bed0b05a2ce68496e73a5c103fb5b815ac2c77e997f46e5d09666c1c978
OskiStealer
36d0c6d5280a29e061d07ad6eac7236e063ee8023ac398bb6d3f34a3f8aacb83
OskiStealer
507cd77f0000cc2af40601e9121683769ea55d389a1df1c7832a103785711fb4
OskiStealer
55580a7b5ec8510e0bf498f20928778b6c7b2071a31d8332f809a7a718c66b48
OskiStealer
5b9eef2199515e5bf4cd00a176b35747f8bc9984183213fec864aca2c1918a70
OskiStealer
6979809578bc2caf8da003a70023e86d66cd9aa7e4b8c4448b942931a908583f
OskiStealer
71f5a0e02cfd97625bfaf4c5e48825b8b08262a7ac89f1b7f8ae82c1200205f8
OskiStealer
bf40454532296d8028d2cc4be8f68076ee1237d5ee71f1c37736176d209ad8a0
OskiStealer
ef9e853a343f1d3588eeaf60c443add28e376fd97f3bc77309b8436349b60bb3
OskiStealer
f20d2b9da240b7cadb6045a4152636c7cb71b13204aaae35e4a927aaeab23520
OskiStealer
+ 419 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/210906-yh4qvsefcr/
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
Drops startup file
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:
aaaonyisi.xyz
Unpacked files
SH256 hash:
e5a0157c094b6b19bc0d47190425ac9328de447fc29d2ce264583a6552c5e051
MD5 hash:
033c416667f200c14475ef60e51da4d0
SHA1 hash:
7702cfd01f0a3be3c6e4cca52f0319205e06b324
Link:
https://www.unpac.me/results/ad0f61fa-60a7-4f64-a366-b2b0097c40a5/
SH256 hash:
7a576bdb35ba9c94c33a3274431412143df98dd3d4171958a76da806bde59cbf
MD5 hash:
84b44274be87aa8d981947e81a357840
SHA1 hash:
6d44760433c5ba5883b56f141edf2549294a32fd
Detections:
win_oski_g0
Create hunting rule
win_oski_auto
Create hunting rule
Link:
https://www.unpac.me/results/ad0f61fa-60a7-4f64-a366-b2b0097c40a5/
SH256 hash:
dc67579f0bd76303b5133e1daaf9c576dd4f3f429ed41a9b0af2dd45736685de
MD5 hash:
48c37718c16d20e45ae78d3755440aa5
SHA1 hash:
8c27f182636991e7adfb72b711cb352d4150d067
Link:
https://www.unpac.me/results/ad0f61fa-60a7-4f64-a366-b2b0097c40a5/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/dc67579f0bd7/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/dc67579f0bd76303b5133e1daaf9c576dd4f3f429ed41a9b0af2dd45736685de

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:INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFuture
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
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 dc67579f0bd76303b5133e1daaf9c576dd4f3f429ed41a9b0af2dd45736685de

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/1597686/
Cape
Cape
https://www.capesandbox.com/analysis/185718/

Comments


Avatar
zbet commented on 2021-09-06 19:47:34 UTC

url : hxxp://cameronznxbas.xyz/css/st.exe