MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 2483e3d38f1856bf14e1bd86692e4ac5b3f330a52166d7708fba883a6809595b. 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 7 YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 2483e3d38f1856bf14e1bd86692e4ac5b3f330a52166d7708fba883a6809595b
SHA3-384 hash: 3a480eb060a57918ac44ccbe9e64a43202acb657bea6c495a72fc2555932a86528ddbe232d662452d3a165e0378bd797
SHA1 hash: f9af55ddd2b0949b4a78f79d95e488d92ec0929c
MD5 hash: c139bfdbe8ede9fc87dff8ea7ed5ca83
humanhash: utah-apart-double-two
File name:obizx.exe
Download: download sample
Signature OskiStealer
Create hunting rule
File size:581'632 bytes
First seen:2021-12-21 14:19:15 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 12288:mxcBuSK3rYouC/6LoXB1JnewGSXzoof15:mCUSK3souCaQ1JnzGSjoofn
Threatray 4'171 similar samples on MalwareBazaar
TLSH T14FC4CE4232AD5F26D3787BF529B8A39477B07C362823E24D5E8971CA1476B808D70F67
File icon (PE):PE icon
dhash icon ce9c9496e4949c9c (73 x AgentTesla, 51 x SnakeKeylogger, 30 x Formbook)
Reporter James_inthe_box
Tags:exe OskiStealer

Indicators Of Compromise (IOCs)

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

IOCThreatFox Reference
http://jessecoltd.ir/6.jpg https://threatfox.abuse.ch/ioc/280082/
http://jessecoltd.ir/1.jpg https://threatfox.abuse.ch/ioc/280083/
http://jessecoltd.ir/2.jpg https://threatfox.abuse.ch/ioc/280084/
http://jessecoltd.ir/3.jpg https://threatfox.abuse.ch/ioc/280085/
http://jessecoltd.ir/4.jpg https://threatfox.abuse.ch/ioc/280086/
http://jessecoltd.ir/5.jpg https://threatfox.abuse.ch/ioc/280087/
http://jessecoltd.ir/7.jpg https://threatfox.abuse.ch/ioc/280088/

Intelligence

File Origin
# of uploads :
1
# of downloads :
217
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
ORDER-43-20211221.doc
Verdict:
Malicious activity
Analysis date:
2021-12-21 14:10:05 UTC
Tags:
exploit CVE-2017-11882 loader trojan stealer vidar
Link:
https://app.any.run/tasks/5795cdb7-4f22-4dd1-8da2-9672bbd6455a

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/215667/
Detection(s):
SecuriteInfo.com.Trojan.PackedNET.1140.25163.16898.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
DNS request
Sending a custom TCP request
Unauthorized injection to a recently created process
Creating a file
Reading critical registry keys
Delayed writing of the file
Сreating synchronization primitives
Running batch commands
Creating a process with a hidden window
Stealing user critical data
Launching a tool to kill processes
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
obfuscated packed
Link:
https://www.filescan.io/uploads/61c1e2968991ba72b3904db3/reports/356aa371-df80-4274-8d9d-614596b34f3e/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/6662bdd7-eaab-4ea5-a844-3e48cfef6bc8
Result
Threat name:
Oski Stealer Vidar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/911000
Signature
.NET source code contains potential unpacker
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)
Injects a PE file into a foreign processes
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
Yara detected AntiVM3
Yara detected Oski Stealer
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 543474 Sample: obizx.exe Startdate: 21/12/2021 Architecture: WINDOWS Score: 100 35 Found malware configuration 2->35 37 Multi AV Scanner detection for submitted file 2->37 39 Yara detected Oski Stealer 2->39 41 8 other signatures 2->41 8 obizx.exe 3 2->8         started        process3 file4 23 C:\Users\user\AppData\Local\...\obizx.exe.log, ASCII 8->23 dropped 43 Injects a PE file into a foreign processes 8->43 12 obizx.exe 196 8->12         started        signatures5 process6 dnsIp7 33 jessecoltd.ir 172.67.132.27, 49770, 80 CLOUDFLARENETUS United States 12->33 25 C:\ProgramData\vcruntime140.dll, PE32 12->25 dropped 27 C:\ProgramData\sqlite3.dll, PE32 12->27 dropped 29 C:\ProgramData\softokn3.dll, PE32 12->29 dropped 31 4 other files (none is malicious) 12->31 dropped 45 Tries to harvest and steal browser information (history, passwords, etc) 12->45 47 Tries to steal Crypto Currency Wallets 12->47 17 cmd.exe 1 12->17         started        file8 signatures9 process10 process11 19 taskkill.exe 1 17->19         started        21 conhost.exe 17->21         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/2483e3d38f1856bf14e1bd86692e4ac5b3f330a52166d7708fba883a6809595b/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-12-21 14:11:34 UTC
File Type:
PE (.Net Exe)
Extracted files:
10
AV detection:
17 of 28 (60.71%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=esb6hu4pdbll6fhbxwdgslskywz7gmffeftno4epxkedu2ajlfnq._file
Verdict:
malicious
Similar samples:
192f884438809d6fb01ae0c89c4ccd1fdae62d429e78bdbcc4ff4d28a54049af
OskiStealer
66a1b49f893976a60ca25813345ea54a5582acf7a5a0821c03cc45bcfc89b5c5
OskiStealer
6b869d8825516d0b977d48043d1d56d233de7b128074b068566dc33e0ff9fdb7
OskiStealer
b70f4075c4ce52960faacb101aac17a9cd734cbec86b6a9d63944e900420bde1
OskiStealer
c17243e46ff224631e589c55642c3666e5c560715841e8b8ebdd511cb70da8dd
OskiStealer
fb142a5509971d78923e077c658479a60287c1e6d921adfc75f3a426b5ffab7b
OskiStealer
+ 4'161 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/211221-rnewcseedl/
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:
jessecoltd.ir
Unpacked files
SH256 hash:
cb57359c65484d83ff4485720bd14a896aeb12fdaf8d65df9cd9b9511c7f6446
MD5 hash:
d11d5c1c98fba1213e6868de60545b42
SHA1 hash:
fbdf324f4fca27e78c1831828ae607e5ff2293ba
Link:
https://www.unpac.me/results/7be615ed-4463-4093-ab9a-f27a85e86477/
SH256 hash:
becbc1b05321dc51b2e50fcbb6c2be8da96c2648bebc11638701a69f22b226d8
MD5 hash:
f6b589c57ed54d122c17eace179999e7
SHA1 hash:
712c69f3b4c46d3909f7251b9d2ad7675b00fccd
Detections:
win_oski_g0
Create hunting rule
win_oski_auto
Create hunting rule
Link:
https://www.unpac.me/results/7be615ed-4463-4093-ab9a-f27a85e86477/
Parent samples :
2483e3d38f1856bf14e1bd86692e4ac5b3f330a52166d7708fba883a6809595b
fc55c796977aaab2254fd98cd04595c9eab86f459f3288f5f33d8fc9f050fdc4
33a271b57993a4279618294783f95d3634d0358b5030ea48cf9896475e3d8546
7d8720a816740e98db989e14ce75f99de9bbd25924fbbbaf7a8d0c783c612579
becbc1b05321dc51b2e50fcbb6c2be8da96c2648bebc11638701a69f22b226d8
SH256 hash:
9f5763966bacdc6de3944a6e06a49b05869c38f2e98b32cb93b483a480a6ffff
MD5 hash:
3418c620c4b9dd4533a88f1ba5ec3ff1
SHA1 hash:
12f6aaf1c90030c4063d42a27b2e7000a08b6e74
Link:
https://www.unpac.me/results/7be615ed-4463-4093-ab9a-f27a85e86477/
SH256 hash:
2483e3d38f1856bf14e1bd86692e4ac5b3f330a52166d7708fba883a6809595b
MD5 hash:
c139bfdbe8ede9fc87dff8ea7ed5ca83
SHA1 hash:
f9af55ddd2b0949b4a78f79d95e488d92ec0929c
Link:
https://www.unpac.me/results/7be615ed-4463-4093-ab9a-f27a85e86477/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/2483e3d38f18/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/2483e3d38f1856bf14e1bd86692e4ac5b3f330a52166d7708fba883a6809595b

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.

  
Delivery method
Other
Cape
Cape
https://www.capesandbox.com/analysis/215667/
  
URLhaus
https://urlhaus.abuse.ch/url/1907407/

Comments