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 8 IoCs

stealer

resource	yara_rule
behavioral2/memory/2064-2-0x0000000003F80000-0x0000000004090000-memory.dmp	family_vidar_v7
behavioral2/memory/3736-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3736-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3736-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3736-15-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3736-16-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3736-33-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3736-34-0x0000000000400000-0x0000000000648000-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
Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
3736	kat6CA4.tmp

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
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 2064 set thread context of 3736	2064	125342391938a8fb66cc4b1eb71a29f8157de745ab6be7ede70f0bcdc8515934.exe	78

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	kat6CA4.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3736	kat6CA4.tmp
3736	kat6CA4.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2064 wrote to memory of 3736	2064	125342391938a8fb66cc4b1eb71a29f8157de745ab6be7ede70f0bcdc8515934.exe	78
PID 2064 wrote to memory of 3736	2064	125342391938a8fb66cc4b1eb71a29f8157de745ab6be7ede70f0bcdc8515934.exe	78
PID 2064 wrote to memory of 3736	2064	125342391938a8fb66cc4b1eb71a29f8157de745ab6be7ede70f0bcdc8515934.exe	78
PID 2064 wrote to memory of 3736	2064	125342391938a8fb66cc4b1eb71a29f8157de745ab6be7ede70f0bcdc8515934.exe	78
PID 2064 wrote to memory of 3736	2064	125342391938a8fb66cc4b1eb71a29f8157de745ab6be7ede70f0bcdc8515934.exe	78
PID 2064 wrote to memory of 3736	2064	125342391938a8fb66cc4b1eb71a29f8157de745ab6be7ede70f0bcdc8515934.exe	78
PID 2064 wrote to memory of 3736	2064	125342391938a8fb66cc4b1eb71a29f8157de745ab6be7ede70f0bcdc8515934.exe	78
PID 2064 wrote to memory of 3736	2064	125342391938a8fb66cc4b1eb71a29f8157de745ab6be7ede70f0bcdc8515934.exe	78

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:2064
- C:\Users\Admin\AppData\Local\Temp\kat6CA4.tmp
  C:\Users\Admin\AppData\Local\Temp\kat6CA4.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3736

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

2

T1012

System Information Discovery

1

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\kat6CA4.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2064-0-0x00000000022D0000-0x00000000022D1000-memory.dmp

Filesize
4KB

Download
memory/2064-2-0x0000000003F80000-0x0000000004090000-memory.dmp

Filesize
1.1MB

Download
memory/2064-10-0x0000000000400000-0x0000000000594000-memory.dmp

Filesize
1.6MB

Download
memory/3736-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3736-9-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3736-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3736-15-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3736-16-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3736-19-0x00000000193A0000-0x00000000195FF000-memory.dmp

Filesize
2.4MB

Download
memory/3736-33-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3736-34-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads