stealc | 3ab231d18be903a1364b8ed968ee9ac3fe1a82bb75235ec8e7088b76b87b518a

General

Target
3ab231d18be903a1364b8ed968ee9ac3fe1a82bb75235ec8e7088b76b87b518a.exe
Size 416KB
Sample240606-3evq1aef32
SHA256 3ab231d18be903a1364b8ed968ee9ac3fe1a82bb75235ec8e7088b76b87b518a
MD5 3e54245fb579c525a1ee9f8830a12194
SHA1 ccc3d6422f19b824051841eb58698536a8f223d7
SHA512 f0d6db9fea61aafa8a9c0b3ba25110bbc3ca9ae32e7cc5416872a6683f2dee6a5909f4f206f9c934f0e42711f4a88f8a3513214de7de74fcb18e8266b4714558
SSDEEP 12288:RdkUBLHCIUDuVVCTh3pbB1r7Dt5r88s0CTEO:RdNhCIFVCTh3pb7rF5Dkt
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://t.me/ta904ek
https://steamcommunity.com/profiles/76561199695752269

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Signatures

Detect Vidar Stealer 8 IoCs

stealer

resource	yara_rule
behavioral2/memory/420-2-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/420-5-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/420-7-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/420-22-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/420-40-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/420-41-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/420-53-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/420-54-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
Downloads MZ/PE file
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2092 set thread context of 420	2092	3ab231d18be903a1364b8ed968ee9ac3fe1a82bb75235ec8e7088b76b87b518a.exe	72

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 1 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	RegAsm.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4172	timeout.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
420	RegAsm.exe
420	RegAsm.exe
420	RegAsm.exe
420	RegAsm.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2092 wrote to memory of 420	2092	3ab231d18be903a1364b8ed968ee9ac3fe1a82bb75235ec8e7088b76b87b518a.exe	72
PID 2092 wrote to memory of 420	2092	3ab231d18be903a1364b8ed968ee9ac3fe1a82bb75235ec8e7088b76b87b518a.exe	72
PID 2092 wrote to memory of 420	2092	3ab231d18be903a1364b8ed968ee9ac3fe1a82bb75235ec8e7088b76b87b518a.exe	72
PID 2092 wrote to memory of 420	2092	3ab231d18be903a1364b8ed968ee9ac3fe1a82bb75235ec8e7088b76b87b518a.exe	72
PID 2092 wrote to memory of 420	2092	3ab231d18be903a1364b8ed968ee9ac3fe1a82bb75235ec8e7088b76b87b518a.exe	72
PID 2092 wrote to memory of 420	2092	3ab231d18be903a1364b8ed968ee9ac3fe1a82bb75235ec8e7088b76b87b518a.exe	72
PID 2092 wrote to memory of 420	2092	3ab231d18be903a1364b8ed968ee9ac3fe1a82bb75235ec8e7088b76b87b518a.exe	72
PID 2092 wrote to memory of 420	2092	3ab231d18be903a1364b8ed968ee9ac3fe1a82bb75235ec8e7088b76b87b518a.exe	72
PID 2092 wrote to memory of 420	2092	3ab231d18be903a1364b8ed968ee9ac3fe1a82bb75235ec8e7088b76b87b518a.exe	72
PID 420 wrote to memory of 4708	420	RegAsm.exe	74
PID 420 wrote to memory of 4708	420	RegAsm.exe	74
PID 420 wrote to memory of 4708	420	RegAsm.exe	74
PID 4708 wrote to memory of 4172	4708	cmd.exe	76
PID 4708 wrote to memory of 4172	4708	cmd.exe	76
PID 4708 wrote to memory of 4172	4708	cmd.exe	76

C:\Users\Admin\AppData\Local\Temp\3ab231d18be903a1364b8ed968ee9ac3fe1a82bb75235ec8e7088b76b87b518a.exe
"C:\Users\Admin\AppData\Local\Temp\3ab231d18be903a1364b8ed968ee9ac3fe1a82bb75235ec8e7088b76b87b518a.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2092
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:420
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\EHJKFCGHIDHC" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4708
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:4172

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

3

T1552

Credentials In Files

3

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

3

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/420-22-0x0000000000400000-0x0000000000649000-memory.dmp

Download

memory/420-2-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/420-5-0x0000000000400000-0x0000000000649000-memory.dmp

Download

memory/420-7-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/420-23-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/420-25-0x000000001BAD0000-0x000000001BD2F000-memory.dmp

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memory/420-40-0x0000000000400000-0x0000000000649000-memory.dmp

Download

memory/420-41-0x0000000000400000-0x0000000000649000-memory.dmp

Download

memory/420-53-0x0000000000400000-0x0000000000649000-memory.dmp

Download

memory/420-54-0x0000000000400000-0x0000000000649000-memory.dmp

Download

memory/2092-1-0x0000000000BD0000-0x0000000000BD1000-memory.dmp

Download

memory/2092-0-0x0000000000BD0000-0x0000000000BD1000-memory.dmp

Download

memory/2092-3-0x0000000000BD0000-0x0000000000BD1000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads