MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 cd238eae8acd5aaece92a1c264437fedea2fd7088df8353d81cdfd6af037e69b. 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: 14


Intelligence 14 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: cd238eae8acd5aaece92a1c264437fedea2fd7088df8353d81cdfd6af037e69b
SHA3-384 hash: 8f8b53c9c29f129f78cbdc1e0e122707747ff3404b036f28f7533a5eaec347b33089c00642f26f9e68e625ef2180008b
SHA1 hash: 7ff84c9fe7594826d2c8689279979bdc75f0b561
MD5 hash: 6bc672d5f96b14084c561a217731c5a4
humanhash: louisiana-mike-island-idaho
File name:SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.19954
Download: download sample
Signature OskiStealer
Create hunting rule
File size:761'344 bytes
First seen:2022-06-02 05:37:45 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:XAFeHSDxMfiuPXAeV5t0SLF5mzYZgZRQYpiZyBOrNL81dGD+uMWCZqQegCVpUqgY:XPSDmfiuPtT0SLeuatiNoo
Threatray 4'278 similar samples on MalwareBazaar
TLSH T1C9F41898329C36CFC46BCD328A641C60EBA0787FA71BD247986325DD996CB53CF145B2
TrID 64.2% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
11.5% (.SCR) Windows screen saver (13101/52/3)
9.2% (.EXE) Win64 Executable (generic) (10523/12/4)
5.7% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
3.9% (.EXE) Win32 Executable (generic) (4505/5/1)
File icon (PE):PE icon
dhash icon 74f0dcccccd4c0d4 (10 x AgentTesla, 6 x RemcosRAT, 5 x BitRAT)
Reporter SecuriteInfoCom
Tags:exe OskiStealer

Intelligence

File Origin
# of uploads :
1
# of downloads :
315
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
vidar
Create hunting rule
ID:
1
File name:
SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.19954
Verdict:
Malicious activity
Analysis date:
2022-06-02 05:41:00 UTC
Tags:
trojan stealer vidar oski loader
Link:
https://app.any.run/tasks/a7b22918-2fc0-46da-b943-490412eb3a20

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/276232/
Detection(s):
SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.19954.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Sending a custom TCP request
Сreating synchronization primitives
Creating a file in the %AppData% directory
Creating a file in the %temp% directory
Launching a process
Creating a process with a hidden window
Creating a file
Reading critical registry keys
Delayed writing of the file
Running batch commands
Forced shutdown of a system process
Query of malicious DNS domain
Stealing user critical data
Launching a tool to kill processes
Enabling autorun by creating a file
Unauthorized injection to a system process
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
75%
Tags:
cmd.exe control.exe obfuscated packed
Link:
https://www.filescan.io/uploads/629863498787703a222b7548/reports/2421a1bb-653d-4047-84e8-47dfde498f90/overview
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.
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/53eb02d0-6bba-4ac3-a580-71917e450ed9
Result
Threat name:
Oski Stealer, Vidar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1005502
Signature
C2 URLs / IPs found in malware configuration
DLL side loading technique detected
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
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
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
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected Oski Stealer
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 637998 Sample: SecuriteInfo.com.IL.Trojan.... Startdate: 02/06/2022 Architecture: WINDOWS Score: 100 45 Found malware configuration 2->45 47 Malicious sample detected (through community Yara rule) 2->47 49 Multi AV Scanner detection for dropped file 2->49 51 11 other signatures 2->51 8 SecuriteInfo.com.IL.Trojan.MSILMamut.3044.28554.exe 6 2->8         started        process3 file4 27 C:\Users\user\AppData\Roaming\XukguFq.exe, PE32 8->27 dropped 29 C:\Users\user\AppData\Local\...\tmp3078.tmp, XML 8->29 dropped 31 SecuriteInfo.com.I....3044.28554.exe.log, ASCII 8->31 dropped 53 Uses schtasks.exe or at.exe to add and modify task schedules 8->53 55 Writes to foreign memory regions 8->55 57 Injects a PE file into a foreign processes 8->57 12 MSBuild.exe 196 8->12         started        17 schtasks.exe 1 8->17         started        signatures5 process6 dnsIp7 41 chibuzorbaby.com 142.4.0.135, 49741, 49743, 80 UNIFIEDLAYER-AS-1US United States 12->41 43 unitech.co.vu 12->43 33 C:\ProgramData\sqlite3.dll, PE32 12->33 dropped 35 C:\ProgramData\vcruntime140.dll, PE32 12->35 dropped 37 C:\ProgramData\softokn3.dll, PE32 12->37 dropped 39 4 other files (none is malicious) 12->39 dropped 59 Tries to harvest and steal browser information (history, passwords, etc) 12->59 61 DLL side loading technique detected 12->61 63 Tries to steal Crypto Currency Wallets 12->63 19 cmd.exe 1 12->19         started        21 conhost.exe 17->21         started        file8 signatures9 process10 process11 23 taskkill.exe 1 19->23         started        25 conhost.exe 19->25         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/cd238eae8acd5aaece92a1c264437fedea2fd7088df8353d81cdfd6af037e69b/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2022-06-02 02:43:03 UTC
File Type:
PE (.Net Exe)
Extracted files:
37
AV detection:
20 of 26 (76.92%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=zury5lukzvnk5tusuhbgiq375xvc7vyirx4dkpmbzx6wv4bx42nq._file
Verdict:
malicious
Similar samples:
11810610b0fcbfe0edc318d79ede6dcbb2c4b34dccbace91d3775001187c3c96
OskiStealer
1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99
OskiStealer
35f377ad1b6647c04b0967c7825c96360fe035ae7b0fac43380a1cccc8969d85
OskiStealer
6107e3ec5898ce2f80b04ee16b3a41107a0733339cded01cf8c5ade5fc105472
OskiStealer
8399c97b606bb6613f99006964a47064e402e6489574b85db7a9872f601886b2
OskiStealer
95e67dec1a50e9a83fbb5b430c1b21b851e1f0aa8da0ee9efbece3085ad4c462
OskiStealer
aec9eb81f2a2837488165119d41da8eec94607b9bde0b729f811ced008ad95cb
OskiStealer
fabe67cd06d71d24a03fe0d11e62e975de4c58903bcbc35f48a3a566970c228c
OskiStealer
+ 4'268 additional samples on MalwareBazaar
Result
Malware family:
oski
Create hunting rule
Score:
  10/10
Tags:
family:oski infostealer spyware suricata
Link:
https://tria.ge/reports/220602-gbpvpadda3/
Behaviour
Checks processor information in registry
Creates scheduled task(s)
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 computer location settings
Loads dropped DLL
Downloads MZ/PE file
Oski
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt) M2
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer HTTP POST Pattern
Malware Config
C2 Extraction:
unitech.co.vu
Unpacked files
SH256 hash:
f211f5fd84cfb944e2891363a4279fe00b78a1a239a64230e5df8b73294a5abf
MD5 hash:
155bb85abdb74ff99575d52928852a5d
SHA1 hash:
59e05982b53cab2bb3610a49da9994610bed41aa
Link:
https://www.unpac.me/results/5135c57c-d4f2-4b58-a58a-169f91889bd0/
SH256 hash:
79823e47436e129def4fba8ee225347a05b7bb27477fb1cc8be6dc9e9ce75696
MD5 hash:
39f524c1ab0eb76dfd79b2852e5e8c39
SHA1 hash:
428018e1701006744e34480b0029982a76d8a57d
Link:
https://www.unpac.me/results/5135c57c-d4f2-4b58-a58a-169f91889bd0/
SH256 hash:
29c14233e9f39489fb1ea7a21c39c916059f2532ea8b1c015f00c84624409576
MD5 hash:
a6071f6bec8bb24bdf9d4275b6587d0e
SHA1 hash:
01c4909c79daa8fe1f47a4a501900354a40c5f90
Detections:
win_oski_g0
Create hunting rule
win_oski_auto
Create hunting rule
Link:
https://www.unpac.me/results/5135c57c-d4f2-4b58-a58a-169f91889bd0/
Parent samples :
03e727533b2ca8ed0dd10444ce7e95ef19334124fb3014fb090784b2371957b9
35f377ad1b6647c04b0967c7825c96360fe035ae7b0fac43380a1cccc8969d85
95e67dec1a50e9a83fbb5b430c1b21b851e1f0aa8da0ee9efbece3085ad4c462
5b934219ee24cde16acffda6640ac940cfd7f6bdcb93aad90919c89e84343727
b990b5f072914cba8f10f88932ce5be9feff9760f7a1a20d562f885915ca9423
cd238eae8acd5aaece92a1c264437fedea2fd7088df8353d81cdfd6af037e69b
SH256 hash:
cd238eae8acd5aaece92a1c264437fedea2fd7088df8353d81cdfd6af037e69b
MD5 hash:
6bc672d5f96b14084c561a217731c5a4
SHA1 hash:
7ff84c9fe7594826d2c8689279979bdc75f0b561
Link:
https://www.unpac.me/results/5135c57c-d4f2-4b58-a58a-169f91889bd0/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/cd238eae8acd/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/cd238eae8acd5aaece92a1c264437fedea2fd7088df8353d81cdfd6af037e69b

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/276232/

Comments