stealc | 3c928e441fd16ef9af076b1a33fd388ce3e653b53ad4de26dd5603c2695409f6

General

Target

3c928e441fd16ef9af076b1a33fd388ce3e653b53ad4de26dd5603c2695409f6.exe
Size

1.9MB
MD5

33c9d34f742899c5426f74921663911d
SHA1

85b0bd8fdf2e4ae6f6a3e31ea9bc8de8f0f6172e
SHA256

3c928e441fd16ef9af076b1a33fd388ce3e653b53ad4de26dd5603c2695409f6
SHA512

902c4a322b6d40a3ad8c1eca845c9256121304a24f68e12456c228cdf6a99dad8e8e1c8e0561a8c6ad56b8032696b68e3d6fc70c6d286a8524d8943dbbafd4ee
SSDEEP

24576:n/eC7bzaXi7m0gJu0LXolGLbJnR/z4+EbVbw2qug4ctOlQLernWO:nGYz0P0gMS4cdR/z4+UVi4e9Crn

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/2372-2-0x0000000004020000-0x0000000004186000-memory.dmp	family_vidar_v7
behavioral2/memory/5104-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/5104-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/5104-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/5104-24-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/5104-25-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/5104-42-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/5104-43-0x0000000000400000-0x0000000000648000-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
5104	kat4FE5.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 2372 set thread context of 5104	2372	3c928e441fd16ef9af076b1a33fd388ce3e653b53ad4de26dd5603c2695409f6.exe	77

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	kat4FE5.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
5104	kat4FE5.tmp
5104	kat4FE5.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2372 wrote to memory of 5104	2372	3c928e441fd16ef9af076b1a33fd388ce3e653b53ad4de26dd5603c2695409f6.exe	77
PID 2372 wrote to memory of 5104	2372	3c928e441fd16ef9af076b1a33fd388ce3e653b53ad4de26dd5603c2695409f6.exe	77
PID 2372 wrote to memory of 5104	2372	3c928e441fd16ef9af076b1a33fd388ce3e653b53ad4de26dd5603c2695409f6.exe	77
PID 2372 wrote to memory of 5104	2372	3c928e441fd16ef9af076b1a33fd388ce3e653b53ad4de26dd5603c2695409f6.exe	77
PID 2372 wrote to memory of 5104	2372	3c928e441fd16ef9af076b1a33fd388ce3e653b53ad4de26dd5603c2695409f6.exe	77
PID 2372 wrote to memory of 5104	2372	3c928e441fd16ef9af076b1a33fd388ce3e653b53ad4de26dd5603c2695409f6.exe	77
PID 2372 wrote to memory of 5104	2372	3c928e441fd16ef9af076b1a33fd388ce3e653b53ad4de26dd5603c2695409f6.exe	77
PID 2372 wrote to memory of 5104	2372	3c928e441fd16ef9af076b1a33fd388ce3e653b53ad4de26dd5603c2695409f6.exe	77

C:\Users\Admin\AppData\Local\Temp\3c928e441fd16ef9af076b1a33fd388ce3e653b53ad4de26dd5603c2695409f6.exe
"C:\Users\Admin\AppData\Local\Temp\3c928e441fd16ef9af076b1a33fd388ce3e653b53ad4de26dd5603c2695409f6.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2372
- C:\Users\Admin\AppData\Local\Temp\kat4FE5.tmp
  C:\Users\Admin\AppData\Local\Temp\kat4FE5.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:5104

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\kat4FE5.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2372-0-0x0000000002340000-0x0000000002341000-memory.dmp

Filesize
4KB

Download
memory/2372-2-0x0000000004020000-0x0000000004186000-memory.dmp

Filesize
1.4MB

Download
memory/2372-10-0x0000000000400000-0x00000000005DF000-memory.dmp

Filesize
1.9MB

Download
memory/5104-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/5104-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/5104-9-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/5104-24-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/5104-25-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/5104-28-0x0000000026030000-0x000000002628F000-memory.dmp

Filesize
2.4MB

Download
memory/5104-42-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/5104-43-0x0000000000400000-0x0000000000648000-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