stealc | e7eeb69e2aa5a205d9035b52efb9e64fef7484e2cc742d8ec8dbe396b86e50a4

General

Target

file.exe
Size

396KB
MD5

16201cd3113173607e5b7e20294803fe
SHA1

d2c248e987608e80c78c117a59640635d56857f9
SHA256

e7eeb69e2aa5a205d9035b52efb9e64fef7484e2cc742d8ec8dbe396b86e50a4
SHA512

02813f8b8dc63cc704ec109379238d76f6c0b977ce03aac1f614531d4fdf2fd0c52f79ebeaa4c3b1b39b5b5b3aee6803c4b1eefb2a6c107b9a79de9a42449e08
SSDEEP

6144:j6Zp//sCQTfamA1AxyoXG7tKsK0p5zd6ayxiETiZBnIzicdNsxya5zZcCaPI:j6UCQTfaTuls56ay9TYGa3cNI

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://steamcommunity.com/profiles/76561199689717899

https://t.me/copterwin

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 11 IoCs

stealer

resource	yara_rule
behavioral2/memory/2932-1-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/2932-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/2932-6-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/2932-13-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/2932-14-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/2932-31-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/2932-32-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/2932-48-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/2932-49-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/2932-60-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/2932-61-0x0000000000400000-0x0000000000646000-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

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-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	RegAsm.exe

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
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
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
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

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 2296 set thread context of 2932	2296	file.exe	85

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	RegAsm.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4744	timeout.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2932	RegAsm.exe
2932	RegAsm.exe
2932	RegAsm.exe
2932	RegAsm.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2296 wrote to memory of 2932	2296	file.exe	85
PID 2296 wrote to memory of 2932	2296	file.exe	85
PID 2296 wrote to memory of 2932	2296	file.exe	85
PID 2296 wrote to memory of 2932	2296	file.exe	85
PID 2296 wrote to memory of 2932	2296	file.exe	85
PID 2296 wrote to memory of 2932	2296	file.exe	85
PID 2296 wrote to memory of 2932	2296	file.exe	85
PID 2296 wrote to memory of 2932	2296	file.exe	85
PID 2296 wrote to memory of 2932	2296	file.exe	85
PID 2932 wrote to memory of 3324	2932	RegAsm.exe	94
PID 2932 wrote to memory of 3324	2932	RegAsm.exe	94
PID 2932 wrote to memory of 3324	2932	RegAsm.exe	94
PID 3324 wrote to memory of 4744	3324	cmd.exe	96
PID 3324 wrote to memory of 4744	3324	cmd.exe	96
PID 3324 wrote to memory of 4744	3324	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2296
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Checks computer location settings
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2932
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\IJDGIIEBFCBA" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3324
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:4744

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

4

T1552

Credentials In Files

4

T1552.001

Discovery

Query Registry

3

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Data from Local System

4

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/2296-0-0x00000000001D0000-0x00000000001D1000-memory.dmp

Filesize
4KB

Download
memory/2296-2-0x00000000001D0000-0x00000000001D1000-memory.dmp

Filesize
4KB

Download
memory/2932-1-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2932-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2932-6-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2932-13-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2932-14-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2932-16-0x000000001B6B0000-0x000000001B90F000-memory.dmp

Filesize
2.4MB

Download
memory/2932-31-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2932-32-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2932-48-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2932-49-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2932-60-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2932-61-0x0000000000400000-0x0000000000646000-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