stealc | 67aa0099161516f2bb28f7d5ce6126742a140af6fa6feca5693e2114c4599c93

General

Target
67aa0099161516f2bb28f7d5ce6126742a140af6fa6feca5693e2114c4599c93.exe
Size 437KB
Sample240620-2rslqs1ejd
SHA256 67aa0099161516f2bb28f7d5ce6126742a140af6fa6feca5693e2114c4599c93
MD5 a34ba49a94044c74b35f0a0954080b60
SHA1 ee751ed54482862880df3f6c569a8424ebc379b5
SHA512 acfcd598367b0a2018877dbb670cb2b4cd1d1a44f923d111344ccf589387bd7812d45bc9f91405c45b4046b622f16ee6e82e38e881cf210896cb6a5db753270f
SSDEEP 12288:emq4+yM7kG6U+t9Cp8IZsfbqWySGnHzCy71aQlnZx3Q:U7k3U+Os+WDG7LnZp
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://t.me/memve4erin
https://steamcommunity.com/profiles/76561199699680841

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:129.0) Gecko/20100101 Firefox/129.0

Signatures

Detect Vidar Stealer 9 IoCs

stealer

resource	yara_rule
behavioral2/memory/1396-0-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1396-3-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1396-5-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1396-20-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1396-21-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1396-38-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1396-39-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1396-51-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1396-52-0x0000000000400000-0x0000000000648000-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
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 1388 set thread context of 1396	1388	67aa0099161516f2bb28f7d5ce6126742a140af6fa6feca5693e2114c4599c93.exe	73

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
64	timeout.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1396	RegAsm.exe
1396	RegAsm.exe
1396	RegAsm.exe
1396	RegAsm.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1388 wrote to memory of 1396	1388	67aa0099161516f2bb28f7d5ce6126742a140af6fa6feca5693e2114c4599c93.exe	73
PID 1388 wrote to memory of 1396	1388	67aa0099161516f2bb28f7d5ce6126742a140af6fa6feca5693e2114c4599c93.exe	73
PID 1388 wrote to memory of 1396	1388	67aa0099161516f2bb28f7d5ce6126742a140af6fa6feca5693e2114c4599c93.exe	73
PID 1388 wrote to memory of 1396	1388	67aa0099161516f2bb28f7d5ce6126742a140af6fa6feca5693e2114c4599c93.exe	73
PID 1388 wrote to memory of 1396	1388	67aa0099161516f2bb28f7d5ce6126742a140af6fa6feca5693e2114c4599c93.exe	73
PID 1388 wrote to memory of 1396	1388	67aa0099161516f2bb28f7d5ce6126742a140af6fa6feca5693e2114c4599c93.exe	73
PID 1388 wrote to memory of 1396	1388	67aa0099161516f2bb28f7d5ce6126742a140af6fa6feca5693e2114c4599c93.exe	73
PID 1388 wrote to memory of 1396	1388	67aa0099161516f2bb28f7d5ce6126742a140af6fa6feca5693e2114c4599c93.exe	73
PID 1388 wrote to memory of 1396	1388	67aa0099161516f2bb28f7d5ce6126742a140af6fa6feca5693e2114c4599c93.exe	73
PID 1396 wrote to memory of 2104	1396	RegAsm.exe	75
PID 1396 wrote to memory of 2104	1396	RegAsm.exe	75
PID 1396 wrote to memory of 2104	1396	RegAsm.exe	75
PID 2104 wrote to memory of 64	2104	cmd.exe	77
PID 2104 wrote to memory of 64	2104	cmd.exe	77
PID 2104 wrote to memory of 64	2104	cmd.exe	77

C:\Users\Admin\AppData\Local\Temp\67aa0099161516f2bb28f7d5ce6126742a140af6fa6feca5693e2114c4599c93.exe
"C:\Users\Admin\AppData\Local\Temp\67aa0099161516f2bb28f7d5ce6126742a140af6fa6feca5693e2114c4599c93.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1388
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1396
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\JKEHIIJJECFH" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2104
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:64

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

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

4

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/1388-1-0x0000000000DE0000-0x0000000000DE1000-memory.dmp

Download

memory/1396-0-0x0000000000400000-0x0000000000648000-memory.dmp

Download

memory/1396-3-0x0000000000400000-0x0000000000648000-memory.dmp

Download

memory/1396-5-0x0000000000400000-0x0000000000648000-memory.dmp

Download

memory/1396-20-0x0000000000400000-0x0000000000648000-memory.dmp

Download

memory/1396-21-0x0000000000400000-0x0000000000648000-memory.dmp

Download

memory/1396-23-0x00000000190B0000-0x000000001930F000-memory.dmp

Download

memory/1396-38-0x0000000000400000-0x0000000000648000-memory.dmp

Download

memory/1396-39-0x0000000000400000-0x0000000000648000-memory.dmp

Download

memory/1396-51-0x0000000000400000-0x0000000000648000-memory.dmp

Download

memory/1396-52-0x0000000000400000-0x0000000000648000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads