stealc | 125342391938a8fb66cc4b1eb71a29f8157de745ab6be7ede70f0bcdc8515934

General

Target

125342391938a8fb66cc4b1eb71a29f8157de745ab6be7ede70f0bcdc8515934.exe
Size

1.6MB
MD5

562abe05e86fc779645d4059fa8f8865
SHA1

eba1f7c67b6478867620d06224778f257ef23c10
SHA256

125342391938a8fb66cc4b1eb71a29f8157de745ab6be7ede70f0bcdc8515934
SHA512

c897e3b657edd0890aeb8f73a85fea9b838f2a7664c57eb3eabd80891653652b2bc9c21588593dae03accaf08d8f74817c0ef59763c12d8e69bcb66a604c3c90
SSDEEP

24576:spM5863IGfTAVpalBzUfMxVVtes12FxwojKr98YGeGG9i:spQLYkTYp6BzUkxVVChjHZQs

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

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/2324-1-0x0000000003FA0000-0x00000000040B0000-memory.dmp	family_vidar_v7
behavioral1/memory/928-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/928-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/928-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/928-11-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/928-12-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/928-13-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/928-14-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/928-15-0x0000000000400000-0x0000000000648000-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

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-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	kat4A09.tmp

Executes dropped EXE 1 IoCs

pid	Process
928	kat4A09.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 2324 set thread context of 928	2324	125342391938a8fb66cc4b1eb71a29f8157de745ab6be7ede70f0bcdc8515934.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	kat4A09.tmp

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
696	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
928	kat4A09.tmp
928	kat4A09.tmp

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2324 wrote to memory of 928	2324	125342391938a8fb66cc4b1eb71a29f8157de745ab6be7ede70f0bcdc8515934.exe	81
PID 2324 wrote to memory of 928	2324	125342391938a8fb66cc4b1eb71a29f8157de745ab6be7ede70f0bcdc8515934.exe	81
PID 2324 wrote to memory of 928	2324	125342391938a8fb66cc4b1eb71a29f8157de745ab6be7ede70f0bcdc8515934.exe	81
PID 2324 wrote to memory of 928	2324	125342391938a8fb66cc4b1eb71a29f8157de745ab6be7ede70f0bcdc8515934.exe	81
PID 2324 wrote to memory of 928	2324	125342391938a8fb66cc4b1eb71a29f8157de745ab6be7ede70f0bcdc8515934.exe	81
PID 2324 wrote to memory of 928	2324	125342391938a8fb66cc4b1eb71a29f8157de745ab6be7ede70f0bcdc8515934.exe	81
PID 2324 wrote to memory of 928	2324	125342391938a8fb66cc4b1eb71a29f8157de745ab6be7ede70f0bcdc8515934.exe	81
PID 2324 wrote to memory of 928	2324	125342391938a8fb66cc4b1eb71a29f8157de745ab6be7ede70f0bcdc8515934.exe	81
PID 928 wrote to memory of 5048	928	kat4A09.tmp	83
PID 928 wrote to memory of 5048	928	kat4A09.tmp	83
PID 928 wrote to memory of 5048	928	kat4A09.tmp	83
PID 5048 wrote to memory of 696	5048	cmd.exe	85
PID 5048 wrote to memory of 696	5048	cmd.exe	85
PID 5048 wrote to memory of 696	5048	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\125342391938a8fb66cc4b1eb71a29f8157de745ab6be7ede70f0bcdc8515934.exe
"C:\Users\Admin\AppData\Local\Temp\125342391938a8fb66cc4b1eb71a29f8157de745ab6be7ede70f0bcdc8515934.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2324
- C:\Users\Admin\AppData\Local\Temp\kat4A09.tmp
  C:\Users\Admin\AppData\Local\Temp\kat4A09.tmp
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:928
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat4A09.tmp" & rd /s /q "C:\ProgramData\KFHJJJKKFHID" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:5048
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:696

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

3

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat4A09.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/928-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/928-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/928-9-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/928-11-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/928-12-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/928-13-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/928-14-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/928-15-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2324-0-0x0000000000650000-0x0000000000651000-memory.dmp

Filesize
4KB

Download
memory/2324-1-0x0000000003FA0000-0x00000000040B0000-memory.dmp

Filesize
1.1MB

Download
memory/2324-10-0x0000000000400000-0x0000000000594000-memory.dmp

Filesize
1.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads