stealc | dee8f2622e63d2de701c67d140c288f337cf1765c1c6394a0b41487f8802413c

Analysis

max time kernel
52s
max time network
53s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
11/06/2024, 22:39

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General

Target
dee8f2622e63d2de701c67d140c288f337cf1765c1c6394a0b41487f8802413c.exe
Size 1.6MB
Sample240611-2la5havcmj
SHA256 dee8f2622e63d2de701c67d140c288f337cf1765c1c6394a0b41487f8802413c
MD5 00d5374fee917da297a33a8756dd1994
SHA1 d3ac1229f389e5972376acd914f72b5e75a24895
SHA512 02a9fb18ca5986ac536c7825240977b4bdfb8c6cdd493dd006f9e3ef7ddd9e51e8c51940d22470c997c68166107e22595604b75c37d441fb38c4cf6b5ec07e46
SSDEEP 24576:spM5863IGfTAVpalBvUfMxVVtes12FxwojKr98YGeGG9i:spQLYkTYp6BvUkxVVChjHZQs
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
behavioral1/memory/432-1-0x0000000003FC0000-0x00000000040D0000-memory.dmp	family_vidar_v7
behavioral1/memory/4900-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4900-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4900-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4900-11-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4900-12-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4900-13-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4900-14-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4900-17-0x0000000000400000-0x0000000000648000-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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	kat44D9.tmp

Executes dropped EXE 1 IoCs

pid	Process
4900	kat44D9.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 432 set thread context of 4900	432	dee8f2622e63d2de701c67d140c288f337cf1765c1c6394a0b41487f8802413c.exe	81

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	kat44D9.tmp

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3528	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4900	kat44D9.tmp
4900	kat44D9.tmp

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 432 wrote to memory of 4900	432	dee8f2622e63d2de701c67d140c288f337cf1765c1c6394a0b41487f8802413c.exe	81
PID 432 wrote to memory of 4900	432	dee8f2622e63d2de701c67d140c288f337cf1765c1c6394a0b41487f8802413c.exe	81
PID 432 wrote to memory of 4900	432	dee8f2622e63d2de701c67d140c288f337cf1765c1c6394a0b41487f8802413c.exe	81
PID 432 wrote to memory of 4900	432	dee8f2622e63d2de701c67d140c288f337cf1765c1c6394a0b41487f8802413c.exe	81
PID 432 wrote to memory of 4900	432	dee8f2622e63d2de701c67d140c288f337cf1765c1c6394a0b41487f8802413c.exe	81
PID 432 wrote to memory of 4900	432	dee8f2622e63d2de701c67d140c288f337cf1765c1c6394a0b41487f8802413c.exe	81
PID 432 wrote to memory of 4900	432	dee8f2622e63d2de701c67d140c288f337cf1765c1c6394a0b41487f8802413c.exe	81
PID 432 wrote to memory of 4900	432	dee8f2622e63d2de701c67d140c288f337cf1765c1c6394a0b41487f8802413c.exe	81
PID 4900 wrote to memory of 3976	4900	kat44D9.tmp	83
PID 4900 wrote to memory of 3976	4900	kat44D9.tmp	83
PID 4900 wrote to memory of 3976	4900	kat44D9.tmp	83
PID 3976 wrote to memory of 3528	3976	cmd.exe	85
PID 3976 wrote to memory of 3528	3976	cmd.exe	85
PID 3976 wrote to memory of 3528	3976	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\dee8f2622e63d2de701c67d140c288f337cf1765c1c6394a0b41487f8802413c.exe
"C:\Users\Admin\AppData\Local\Temp\dee8f2622e63d2de701c67d140c288f337cf1765c1c6394a0b41487f8802413c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:432
- C:\Users\Admin\AppData\Local\Temp\kat44D9.tmp
  C:\Users\Admin\AppData\Local\Temp\kat44D9.tmp
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4900
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat44D9.tmp" & rd /s /q "C:\ProgramData\HIIIJDAAAAAA" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3976
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:3528

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

kat44D9.tmp

Path C:\Users\Admin\AppData\Local\Temp\kat44D9.tmp
Size 861KB
SHA256 6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
MD5 66064dbdb70a5eb15ebf3bf65aba254b
SHA1 0284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA512 b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f
SSDEEP 24576:o0ESdQpglO1CxDyawn27h+9hrlgKQY9SGcZwCdTp:o0RIglO1CuL9VNcaCd9
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/432-0-0x00000000021F0000-0x00000000021F1000-memory.dmp

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memory/432-1-0x0000000003FC0000-0x00000000040D0000-memory.dmp

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memory/432-9-0x0000000000400000-0x0000000000594000-memory.dmp

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memory/4900-10-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/4900-8-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/4900-4-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/4900-11-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/4900-12-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/4900-13-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/4900-14-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/4900-17-0x0000000000400000-0x0000000000648000-memory.dmp

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