stealc | 2be93311972fd743e7861765a58f2e48777802166de7710e6bb697f8fc2d2840

Analysis

max time kernel
146s
max time network
149s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
12/06/2024, 04:40

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General

Target
2be93311972fd743e7861765a58f2e48777802166de7710e6bb697f8fc2d2840.exe
Size 1.6MB
Sample240612-fa11ws1dkc
SHA256 2be93311972fd743e7861765a58f2e48777802166de7710e6bb697f8fc2d2840
MD5 78b562a8904bfc21e6c8bacc1fb349ae
SHA1 6bfd1659e1b4860665d1c3a17f1ce528bc30b74c
SHA512 3040ece80a7d53d8404d05f0d40309a7078d00e1b963194dfe52d071b8a9dd1e81c7b347c1ecff39624a697e4a7f71f37768ea42c4a5e3ef753a88a1a0678cd2
SSDEEP 24576:spM5863IGfTAVpalBkUfMxVVtes12FxwojKr98YGeGG9i:spQLYkTYp6BkUkxVVChjHZQs
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/4092-1-0x0000000002AA0000-0x0000000002BB0000-memory.dmp	family_vidar_v7
behavioral2/memory/1408-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1408-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1408-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1408-11-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1408-12-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1408-13-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1408-14-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1408-17-0x0000000000400000-0x0000000000648000-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
1408	kat77B0.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 4092 set thread context of 1408	4092	2be93311972fd743e7861765a58f2e48777802166de7710e6bb697f8fc2d2840.exe	80

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	kat77B0.tmp

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2324	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1408	kat77B0.tmp
1408	kat77B0.tmp

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4092 wrote to memory of 1408	4092	2be93311972fd743e7861765a58f2e48777802166de7710e6bb697f8fc2d2840.exe	80
PID 4092 wrote to memory of 1408	4092	2be93311972fd743e7861765a58f2e48777802166de7710e6bb697f8fc2d2840.exe	80
PID 4092 wrote to memory of 1408	4092	2be93311972fd743e7861765a58f2e48777802166de7710e6bb697f8fc2d2840.exe	80
PID 4092 wrote to memory of 1408	4092	2be93311972fd743e7861765a58f2e48777802166de7710e6bb697f8fc2d2840.exe	80
PID 4092 wrote to memory of 1408	4092	2be93311972fd743e7861765a58f2e48777802166de7710e6bb697f8fc2d2840.exe	80
PID 4092 wrote to memory of 1408	4092	2be93311972fd743e7861765a58f2e48777802166de7710e6bb697f8fc2d2840.exe	80
PID 4092 wrote to memory of 1408	4092	2be93311972fd743e7861765a58f2e48777802166de7710e6bb697f8fc2d2840.exe	80
PID 4092 wrote to memory of 1408	4092	2be93311972fd743e7861765a58f2e48777802166de7710e6bb697f8fc2d2840.exe	80
PID 1408 wrote to memory of 3872	1408	kat77B0.tmp	82
PID 1408 wrote to memory of 3872	1408	kat77B0.tmp	82
PID 1408 wrote to memory of 3872	1408	kat77B0.tmp	82
PID 3872 wrote to memory of 2324	3872	cmd.exe	84
PID 3872 wrote to memory of 2324	3872	cmd.exe	84
PID 3872 wrote to memory of 2324	3872	cmd.exe	84

C:\Users\Admin\AppData\Local\Temp\2be93311972fd743e7861765a58f2e48777802166de7710e6bb697f8fc2d2840.exe
"C:\Users\Admin\AppData\Local\Temp\2be93311972fd743e7861765a58f2e48777802166de7710e6bb697f8fc2d2840.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4092
- C:\Users\Admin\AppData\Local\Temp\kat77B0.tmp
  C:\Users\Admin\AppData\Local\Temp\kat77B0.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1408
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat77B0.tmp" & rd /s /q "C:\ProgramData\BKFIJJEGHDAE" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3872
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:2324

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

kat77B0.tmp

Path C:\Users\Admin\AppData\Local\Temp\kat77B0.tmp
Size 861KB
SHA256 6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
MD5 66064dbdb70a5eb15ebf3bf65aba254b
SHA1 0284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA512 b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f
SSDEEP 24576:o0ESdQpglO1CxDyawn27h+9hrlgKQY9SGcZwCdTp:o0RIglO1CuL9VNcaCd9
MD5 SHA1 SHA512 SSDEEP

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memory/1408-8-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/1408-10-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/1408-4-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/1408-11-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/1408-12-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/1408-13-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/1408-14-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/1408-17-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/4092-0-0x00000000022F0000-0x00000000022F1000-memory.dmp

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memory/4092-1-0x0000000002AA0000-0x0000000002BB0000-memory.dmp

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memory/4092-9-0x0000000000400000-0x0000000000594000-memory.dmp

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