stealc | 51cba9b4aefefaf72a791e1929f98553f50d643a22179a6aaac9d13f45ea8b43

General

Target

51cba9b4aefefaf72a791e1929f98553f50d643a22179a6aaac9d13f45ea8b43.exe
Size

355KB
MD5

22152460b13e4c2473dc3fcdea192933
SHA1

48ce4a69302e860cd905cd02a10aac942f09d9f3
SHA256

51cba9b4aefefaf72a791e1929f98553f50d643a22179a6aaac9d13f45ea8b43
SHA512

1dbcc6f21c9adfc4f28434cffac8c00fb251e3fbf574a69345792837989f74bfc74a67462e7c4f71333a07caf90e0f3e6c51daf0b2640bae3e06af14c8855104
SSDEEP

6144:KnRqyzZ8VqCaMx3CkcY7FGCdGr0gx1POGIAYanWdHBSxz27XrvnksFwemJ:6RqyzZ2IOGCgfPOGI2nWdhSzUbkReG

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 9 IoCs

stealer

resource	yara_rule
behavioral2/memory/1424-2-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/1424-7-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/1424-5-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/1424-13-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/1424-14-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/1424-31-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/1424-32-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/1424-44-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/1424-45-0x0000000000400000-0x0000000000646000-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
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 3368 set thread context of 1424	3368	51cba9b4aefefaf72a791e1929f98553f50d643a22179a6aaac9d13f45ea8b43.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
4168	timeout.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1424	RegAsm.exe
1424	RegAsm.exe
1424	RegAsm.exe
1424	RegAsm.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3368 wrote to memory of 1424	3368	51cba9b4aefefaf72a791e1929f98553f50d643a22179a6aaac9d13f45ea8b43.exe	73
PID 3368 wrote to memory of 1424	3368	51cba9b4aefefaf72a791e1929f98553f50d643a22179a6aaac9d13f45ea8b43.exe	73
PID 3368 wrote to memory of 1424	3368	51cba9b4aefefaf72a791e1929f98553f50d643a22179a6aaac9d13f45ea8b43.exe	73
PID 3368 wrote to memory of 1424	3368	51cba9b4aefefaf72a791e1929f98553f50d643a22179a6aaac9d13f45ea8b43.exe	73
PID 3368 wrote to memory of 1424	3368	51cba9b4aefefaf72a791e1929f98553f50d643a22179a6aaac9d13f45ea8b43.exe	73
PID 3368 wrote to memory of 1424	3368	51cba9b4aefefaf72a791e1929f98553f50d643a22179a6aaac9d13f45ea8b43.exe	73
PID 3368 wrote to memory of 1424	3368	51cba9b4aefefaf72a791e1929f98553f50d643a22179a6aaac9d13f45ea8b43.exe	73
PID 3368 wrote to memory of 1424	3368	51cba9b4aefefaf72a791e1929f98553f50d643a22179a6aaac9d13f45ea8b43.exe	73
PID 3368 wrote to memory of 1424	3368	51cba9b4aefefaf72a791e1929f98553f50d643a22179a6aaac9d13f45ea8b43.exe	73
PID 1424 wrote to memory of 4472	1424	RegAsm.exe	75
PID 1424 wrote to memory of 4472	1424	RegAsm.exe	75
PID 1424 wrote to memory of 4472	1424	RegAsm.exe	75
PID 4472 wrote to memory of 4168	4472	cmd.exe	77
PID 4472 wrote to memory of 4168	4472	cmd.exe	77
PID 4472 wrote to memory of 4168	4472	cmd.exe	77

C:\Users\Admin\AppData\Local\Temp\51cba9b4aefefaf72a791e1929f98553f50d643a22179a6aaac9d13f45ea8b43.exe
"C:\Users\Admin\AppData\Local\Temp\51cba9b4aefefaf72a791e1929f98553f50d643a22179a6aaac9d13f45ea8b43.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3368
- 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:1424
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\GIIEGHIDBGHI" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4472
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:4168

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/1424-13-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1424-2-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1424-7-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1424-5-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1424-14-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1424-16-0x0000000019180000-0x00000000193DF000-memory.dmp

Filesize
2.4MB

Download
memory/1424-31-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1424-32-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1424-44-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1424-45-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3368-1-0x0000000000820000-0x0000000000821000-memory.dmp

Filesize
4KB

Download
memory/3368-3-0x0000000000820000-0x0000000000821000-memory.dmp

Filesize
4KB

Download
memory/3368-0-0x0000000000820000-0x0000000000821000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads