MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 91c54161415866a533e47eee9e0c440a7ad855bab9e198b968439f1ed8ee94ca. 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


Stealc


Vendor detections: 12


Intelligence 12 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 91c54161415866a533e47eee9e0c440a7ad855bab9e198b968439f1ed8ee94ca
SHA3-384 hash: 73f61f585b322caee032decda3a95946eb5e352509e9211f19c851ad87f1c968f2b84dc076e24df9f9de02b230202ca7
SHA1 hash: 56f7104bab803194afc73f36d594cd0504e266c1
MD5 hash: 017ec29b10183144c4ad9c53646ca263
humanhash: pennsylvania-nine-don-seven
File name:Stemix.exe
Download: download sample
Signature Stealc
Create hunting rule
File size:262'144 bytes
First seen:2023-05-16 09:55:35 UTC
Last seen:2023-05-16 10:35:30 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 441dde5b8c1eab2560caa3d857c1a4e1 (1 x Stealc)
ssdeep 3072:xkzo5YPGjX49HwrcGuyec8butFwePbCbe/fFPXArOnPevhbKuu/Ch9QZAhC:xkz+Y5HeBmuvwAbFP7Wu6hG+
Threatray 206 similar samples on MalwareBazaar
TLSH T10444CF123680D436DE6305788CA4CF798D7BBC712B16F9CBB7C80B5E8F25ED1992524A
TrID 47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
15.9% (.EXE) Win64 Executable (generic) (10523/12/4)
9.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
7.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
6.8% (.EXE) Win32 Executable (generic) (4505/5/1)
Reporter abuse_ch
Tags:exe Stealc


Avatar
abuse_ch
Stealc C2:
http://193.233.134.93/fd07ec3137071f71.php

Intelligence

File Origin
# of uploads :
2
# of downloads :
257
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Stemix.exe
Verdict:
Malicious activity
Analysis date:
2023-05-16 09:56:19 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/00e20fa2-bb35-4924-8941-f3ce728b9f9a

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/390349/
Detection(s):
SecuriteInfo.com.Win32.Evo-gen.4718.2361.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Running batch commands
Launching a process
Sending an HTTP GET request
Creating a file in the %temp% subdirectories
Creating a process with a hidden window
Creating a file
Сreating synchronization primitives
Reading critical registry keys
Changing a file
Creating a window
Stealing user critical data
Unauthorized injection to a system process
Sending an HTTP GET request to an infection source
Result
Malware family:
n/a
Score:
  9/10
Tags:
n/a
Link:
https://dragonfly.certego.net/analysis/84807/overview
Behaviour
MalwareBazaar
MeasuringTime
CPUID_Instruction
SystemUptime
EvasionGetTickCount
EvasionQueryPerformanceCounter
CheckCmdLine
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
cmd.exe greyware
Link:
https://www.filescan.io/uploads/646353345d03a85ad80d2020/reports/f219c2fe-57bb-494b-94e9-56defed090fd/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_90%
Link:
https://www.hybrid-analysis.com/sample/91c54161415866a533e47eee9e0c440a7ad855bab9e198b968439f1ed8ee94ca
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:
Stealc
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/bb1ad881-f92b-47d1-8a24-8e4c0056d5e5
Result
Threat name:
Stealc, Vidar
Create hunting rule
Detection:
malicious
Classification:
rans.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1234325
Signature
Allocates memory in foreign processes
Bypasses PowerShell execution policy
C2 URLs / IPs found in malware configuration
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
Modifies existing user documents (likely ransomware behavior)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
Sample uses process hollowing technique
Sigma detected: Dot net compiler compiles file from suspicious location
Snort IDS alert for network traffic
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Crypto Currency Wallets
Writes to foreign memory regions
Yara detected Stealc
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 867307 Sample: Stemix.exe Startdate: 16/05/2023 Architecture: WINDOWS Score: 100 78 Snort IDS alert for network traffic 2->78 80 Multi AV Scanner detection for domain / URL 2->80 82 Found malware configuration 2->82 84 8 other signatures 2->84 11 Stemix.exe 1 2->11         started        13 Compot.exe 2->13         started        15 Compot.exe 2->15         started        process3 process4 17 cmd.exe 1 11->17         started        20 conhost.exe 11->20         started        signatures5 76 Bypasses PowerShell execution policy 17->76 22 powershell.exe 26 17->22         started        process6 file7 58 C:\Users\user\AppData\...\twrqipry.cmdline, Unicode 22->58 dropped 86 Sample uses process hollowing technique 22->86 26 AppLaunch.exe 2 28 22->26         started        31 AppLaunch.exe 22->31         started        33 csc.exe 3 22->33         started        signatures8 process9 dnsIp10 70 193.233.134.93, 49696, 80 FREE-NET-ASFREEnetEU Russian Federation 26->70 72 edge-block-www-env.dropbox-dns.com 162.125.66.15, 443, 49700 DROPBOXUS United States 26->72 74 3 other IPs or domains 26->74 60 C:\Users\user\AppData\...behaviorgraphDBKKFHIEG.exe, PE32 26->60 dropped 62 C:\Users\user\AppData\Local\...\2[1].exe, PE32 26->62 dropped 64 C:\Users\user\Desktop\WKXEWIOTXI.pdf, ASCII 26->64 dropped 96 Tries to harvest and steal browser information (history, passwords, etc) 26->96 98 Tries to steal Crypto Currency Wallets 26->98 100 Modifies existing user documents (likely ransomware behavior) 26->100 35 cmd.exe 1 26->35         started        37 cmd.exe 1 26->37         started        102 Performs DNS queries to domains with low reputation 31->102 66 C:\Users\user\AppData\Local\...\twrqipry.dll, PE32 33->66 dropped 39 cvtres.exe 1 33->39         started        file11 signatures12 process13 process14 41 GDBKKFHIEG.exe 1 35->41         started        44 conhost.exe 35->44         started        46 conhost.exe 37->46         started        48 timeout.exe 1 37->48         started        signatures15 88 Multi AV Scanner detection for dropped file 41->88 90 Machine Learning detection for dropped file 41->90 92 Writes to foreign memory regions 41->92 94 2 other signatures 41->94 50 AppLaunch.exe 1 1 41->50         started        54 conhost.exe 41->54         started        process16 dnsIp17 68 vhsposion.xyz 107.158.128.31, 49701, 80 EONIX-COMMUNICATIONS-ASBLOCK-62904US United States 50->68 56 C:\Users\user\AppData\Roaming\...\Compot.exe, PE32 50->56 dropped file18
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/91c54161415866a533e47eee9e0c440a7ad855bab9e198b968439f1ed8ee94ca/
Threat name:
Win32.Spyware.Stealc
Create hunting rule
Status:
Malicious
First seen:
2023-05-16 09:56:09 UTC
File Type:
PE (Exe)
Extracted files:
1
AV detection:
15 of 24 (62.50%)
Threat level:
  2/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=shcucykblbtkkm7ep3xj4dcebj5nqvn2xhqzroliiopr5whostfa._file
Verdict:
malicious
Similar samples:
1989b578e9207004dba31c1fe03a075d21754f68f3bb43630783f75735e9f33c
Stealc
201510c2fb7bd86e61d220e72625750024c6c528df09774bb4a011193cdb5342
Stealc
208d115132e8b37828c40f56e9b905c72a40b0bc881736ec3a90a1c03baa1214
Stealc
3a93ea1ba99bf336e9439cefc72d74f70d22efae25de85a0852a0e73bf7aae46
Stealc
8d2ae0363e3aef4a75785737bbfe64fa85ec9af8a2e297cc8dfb56b8e5a62d01
Stealc
a89aa208ba0c1f5f19abf41c0218079bc3776189466a617210d9a4cf4886ee31
Stealc
c1dab82709182c10a632dfaa77ce0660e7b4020516ef57b06649a34ada28d9df
Stealc
+ 196 additional samples on MalwareBazaar
Result
Malware family:
stealc
Create hunting rule
Score:
  10/10
Tags:
family:stealc persistence spyware stealer
Link:
https://tria.ge/reports/230516-lyck4acc46/
Behaviour
Checks processor information in registry
Delays execution with timeout.exe
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Accesses cryptocurrency files/wallets, possible credential harvesting
Adds Run key to start application
Executes dropped EXE
Loads dropped DLL
Downloads MZ/PE file
Detects Stealc stealer
Stealc
Malware Config
C2 Extraction:
http://193.233.134.93/fd07ec3137071f71.php
Unpacked files
SH256 hash:
91c54161415866a533e47eee9e0c440a7ad855bab9e198b968439f1ed8ee94ca
MD5 hash:
017ec29b10183144c4ad9c53646ca263
SHA1 hash:
56f7104bab803194afc73f36d594cd0504e266c1
Link:
https://www.unpac.me/results/069b40eb-def7-4143-af21-aacf23f84e90/
Please note that we are no longer able to provide a coverage score for Virus Total.

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_Binary_References_Browsers
Create hunting rule
Author:ditekSHen
Description:Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.
Rule name:win_stealc_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.stealc.
Rule name:yara_template
Create hunting rule

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/390349/

Comments