stealc | 922a5901b4943fbb806890a0734f59c925265dbc3a923299379a82f456bd8327

Analysis

max time kernel
146s
max time network
151s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
11/06/2024, 04:36

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General

Target
922a5901b4943fbb806890a0734f59c925265dbc3a923299379a82f456bd8327.exe
Size 1.7MB
Sample240611-e8jntsvfln
SHA256 922a5901b4943fbb806890a0734f59c925265dbc3a923299379a82f456bd8327
MD5 e0c1091fe54cb0b7ecaf52b1a1f58d5b
SHA1 6c1187b4481b8a80cf05d4ff424a52e65a81557c
SHA512 86f6899fc96d0424bcd08197111e152b4c11a73b195cee7a5006ff8a4b7a20f86016e23ca97fb0640d1980add5cb0ed883cdb1e6c0ad427b97da1825b8f533d0
SSDEEP 24576:JoZYQkmdrf+0UfMxVVtes12FxwojKr98YGeGG9iH:JPYxRUkxVVChjHZQsH
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

https://t.me/r8z0l
https://steamcommunity.com/profiles/76561199698764354

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 9 IoCs

stealer

resource	yara_rule
behavioral2/memory/2464-1-0x0000000003FD0000-0x00000000040E0000-memory.dmp	family_vidar_v7
behavioral2/memory/2848-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2848-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2848-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2848-11-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2848-12-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2848-13-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2848-14-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2848-15-0x0000000000400000-0x0000000000648000-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

Executes dropped EXE 1 IoCs

pid	Process
2848	kat6B2D.tmp

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
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 2464 set thread context of 2848	2464	922a5901b4943fbb806890a0734f59c925265dbc3a923299379a82f456bd8327.exe	76

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	kat6B2D.tmp

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4656	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2848	kat6B2D.tmp
2848	kat6B2D.tmp

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2464 wrote to memory of 2848	2464	922a5901b4943fbb806890a0734f59c925265dbc3a923299379a82f456bd8327.exe	76
PID 2464 wrote to memory of 2848	2464	922a5901b4943fbb806890a0734f59c925265dbc3a923299379a82f456bd8327.exe	76
PID 2464 wrote to memory of 2848	2464	922a5901b4943fbb806890a0734f59c925265dbc3a923299379a82f456bd8327.exe	76
PID 2464 wrote to memory of 2848	2464	922a5901b4943fbb806890a0734f59c925265dbc3a923299379a82f456bd8327.exe	76
PID 2464 wrote to memory of 2848	2464	922a5901b4943fbb806890a0734f59c925265dbc3a923299379a82f456bd8327.exe	76
PID 2464 wrote to memory of 2848	2464	922a5901b4943fbb806890a0734f59c925265dbc3a923299379a82f456bd8327.exe	76
PID 2464 wrote to memory of 2848	2464	922a5901b4943fbb806890a0734f59c925265dbc3a923299379a82f456bd8327.exe	76
PID 2464 wrote to memory of 2848	2464	922a5901b4943fbb806890a0734f59c925265dbc3a923299379a82f456bd8327.exe	76
PID 2848 wrote to memory of 2284	2848	kat6B2D.tmp	78
PID 2848 wrote to memory of 2284	2848	kat6B2D.tmp	78
PID 2848 wrote to memory of 2284	2848	kat6B2D.tmp	78
PID 2284 wrote to memory of 4656	2284	cmd.exe	80
PID 2284 wrote to memory of 4656	2284	cmd.exe	80
PID 2284 wrote to memory of 4656	2284	cmd.exe	80

C:\Users\Admin\AppData\Local\Temp\922a5901b4943fbb806890a0734f59c925265dbc3a923299379a82f456bd8327.exe
"C:\Users\Admin\AppData\Local\Temp\922a5901b4943fbb806890a0734f59c925265dbc3a923299379a82f456bd8327.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2464
- C:\Users\Admin\AppData\Local\Temp\kat6B2D.tmp
  C:\Users\Admin\AppData\Local\Temp\kat6B2D.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2848
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat6B2D.tmp" & rd /s /q "C:\ProgramData\DHDHCGHDHIDH" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2284
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:4656

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

kat6B2D.tmp

Path C:\Users\Admin\AppData\Local\Temp\kat6B2D.tmp
Size 861KB
SHA256 6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
MD5 66064dbdb70a5eb15ebf3bf65aba254b
SHA1 0284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA512 b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f
SSDEEP 24576:o0ESdQpglO1CxDyawn27h+9hrlgKQY9SGcZwCdTp:o0RIglO1CuL9VNcaCd9
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2464-0-0x0000000002310000-0x0000000002311000-memory.dmp

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memory/2464-1-0x0000000003FD0000-0x00000000040E0000-memory.dmp

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memory/2464-9-0x0000000000400000-0x00000000005B8000-memory.dmp

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memory/2848-10-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/2848-8-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/2848-4-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/2848-11-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/2848-12-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/2848-13-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/2848-14-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/2848-15-0x0000000000400000-0x0000000000648000-memory.dmp

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