stealc | a2f94952c89ea440f82877365db5b4a5cf14a10e4168a22a92fce4a8fd98404f

General

Target

a2f94952c89ea440f82877365db5b4a5cf14a10e4168a22a92fce4a8fd98404f.exe
Size

363KB
MD5

75db6dfdebb9bf0d98acfc15f2219c62
SHA1

5bc1ceec4269b4e893f2b00c1c4b3c0cb42a3291
SHA256

a2f94952c89ea440f82877365db5b4a5cf14a10e4168a22a92fce4a8fd98404f
SHA512

b295c110369cb2c56d87aab45ff93961b076474d16ca9a7138ab3e6e7acbc8a13a2949dcbc88e6f2e96e4fae793e1793b3052c7ec390ee3d6cd517029583dd2f
SSDEEP

6144:1JhLSp8zWMtAJA0Z9aRlEiw+pVc4Amr7me33k/JNSdiaJIlsZa6n:pLSpmqKRw+84B7mA3aJE4aOAFn

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://steamcommunity.com/profiles/76561199686524322

https://t.me/k0mono

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.4.1 Safari/605.1.15 Ddg/17.4.1

Signatures

Detect Vidar Stealer 9 IoCs

stealer

resource	yara_rule
behavioral2/memory/4644-2-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4644-7-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4644-5-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4644-16-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4644-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4644-34-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4644-35-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4644-53-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4644-54-0x0000000000400000-0x0000000000646000-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 2960 set thread context of 4644	2960	a2f94952c89ea440f82877365db5b4a5cf14a10e4168a22a92fce4a8fd98404f.exe	74

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
4784	timeout.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4644	RegAsm.exe
4644	RegAsm.exe
4644	RegAsm.exe
4644	RegAsm.exe
4644	RegAsm.exe
4644	RegAsm.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2960 wrote to memory of 4644	2960	a2f94952c89ea440f82877365db5b4a5cf14a10e4168a22a92fce4a8fd98404f.exe	74
PID 2960 wrote to memory of 4644	2960	a2f94952c89ea440f82877365db5b4a5cf14a10e4168a22a92fce4a8fd98404f.exe	74
PID 2960 wrote to memory of 4644	2960	a2f94952c89ea440f82877365db5b4a5cf14a10e4168a22a92fce4a8fd98404f.exe	74
PID 2960 wrote to memory of 4644	2960	a2f94952c89ea440f82877365db5b4a5cf14a10e4168a22a92fce4a8fd98404f.exe	74
PID 2960 wrote to memory of 4644	2960	a2f94952c89ea440f82877365db5b4a5cf14a10e4168a22a92fce4a8fd98404f.exe	74
PID 2960 wrote to memory of 4644	2960	a2f94952c89ea440f82877365db5b4a5cf14a10e4168a22a92fce4a8fd98404f.exe	74
PID 2960 wrote to memory of 4644	2960	a2f94952c89ea440f82877365db5b4a5cf14a10e4168a22a92fce4a8fd98404f.exe	74
PID 2960 wrote to memory of 4644	2960	a2f94952c89ea440f82877365db5b4a5cf14a10e4168a22a92fce4a8fd98404f.exe	74
PID 2960 wrote to memory of 4644	2960	a2f94952c89ea440f82877365db5b4a5cf14a10e4168a22a92fce4a8fd98404f.exe	74
PID 4644 wrote to memory of 2908	4644	RegAsm.exe	76
PID 4644 wrote to memory of 2908	4644	RegAsm.exe	76
PID 4644 wrote to memory of 2908	4644	RegAsm.exe	76
PID 2908 wrote to memory of 4784	2908	cmd.exe	78
PID 2908 wrote to memory of 4784	2908	cmd.exe	78
PID 2908 wrote to memory of 4784	2908	cmd.exe	78

C:\Users\Admin\AppData\Local\Temp\a2f94952c89ea440f82877365db5b4a5cf14a10e4168a22a92fce4a8fd98404f.exe
"C:\Users\Admin\AppData\Local\Temp\a2f94952c89ea440f82877365db5b4a5cf14a10e4168a22a92fce4a8fd98404f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2960
- 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:4644
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\CFHDHIJDGCBA" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2908
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:4784

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

Replay Monitor

Loading Replay Monitor...

Downloads

memory/2960-3-0x0000000000D80000-0x0000000000D81000-memory.dmp

Filesize
4KB

Download
memory/2960-1-0x0000000000D80000-0x0000000000D81000-memory.dmp

Filesize
4KB

Download
memory/2960-0-0x0000000000D80000-0x0000000000D81000-memory.dmp

Filesize
4KB

Download
memory/4644-16-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4644-7-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4644-5-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4644-2-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4644-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4644-19-0x0000000018FC0000-0x000000001921F000-memory.dmp

Filesize
2.4MB

Download
memory/4644-34-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4644-35-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4644-53-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4644-54-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads