stealc | a7044ef24b07251a4e1b5b311ab214c05f0f2725caf41b8dbc0e4aad1c4f633a

General

Target

a7044ef24b07251a4e1b5b311ab214c05f0f2725caf41b8dbc0e4aad1c4f633a.exe
Size

2.0MB
MD5

52f5cbb5c7a56cba4b9eddd275506680
SHA1

c3b364049bce220ebbd7bce4650fe9f70f3e02d5
SHA256

a7044ef24b07251a4e1b5b311ab214c05f0f2725caf41b8dbc0e4aad1c4f633a
SHA512

e75efa1ff163f32d8c4fcee29b5f35b90ce309a0437640e25a1690c08c258f4ac9452d596ff3dc5a01e4d49281c43ce7018798d2f63a517b2039f4f87aec5c00
SSDEEP

49152:s4K3x1vUaJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18atIuoITsdZ

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 8 IoCs

stealer

resource	yara_rule
behavioral2/memory/1872-2-0x0000000003FE0000-0x0000000004129000-memory.dmp	family_vidar_v7
behavioral2/memory/5092-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/5092-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/5092-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/5092-14-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/5092-15-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/5092-32-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/5092-33-0x0000000000400000-0x0000000000646000-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

Executes dropped EXE 1 IoCs

pid	Process
5092	kat39DC.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 1872 set thread context of 5092	1872	a7044ef24b07251a4e1b5b311ab214c05f0f2725caf41b8dbc0e4aad1c4f633a.exe	84

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	kat39DC.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
5092	kat39DC.tmp
5092	kat39DC.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1872 wrote to memory of 5092	1872	a7044ef24b07251a4e1b5b311ab214c05f0f2725caf41b8dbc0e4aad1c4f633a.exe	84
PID 1872 wrote to memory of 5092	1872	a7044ef24b07251a4e1b5b311ab214c05f0f2725caf41b8dbc0e4aad1c4f633a.exe	84
PID 1872 wrote to memory of 5092	1872	a7044ef24b07251a4e1b5b311ab214c05f0f2725caf41b8dbc0e4aad1c4f633a.exe	84
PID 1872 wrote to memory of 5092	1872	a7044ef24b07251a4e1b5b311ab214c05f0f2725caf41b8dbc0e4aad1c4f633a.exe	84
PID 1872 wrote to memory of 5092	1872	a7044ef24b07251a4e1b5b311ab214c05f0f2725caf41b8dbc0e4aad1c4f633a.exe	84
PID 1872 wrote to memory of 5092	1872	a7044ef24b07251a4e1b5b311ab214c05f0f2725caf41b8dbc0e4aad1c4f633a.exe	84
PID 1872 wrote to memory of 5092	1872	a7044ef24b07251a4e1b5b311ab214c05f0f2725caf41b8dbc0e4aad1c4f633a.exe	84
PID 1872 wrote to memory of 5092	1872	a7044ef24b07251a4e1b5b311ab214c05f0f2725caf41b8dbc0e4aad1c4f633a.exe	84

C:\Users\Admin\AppData\Local\Temp\a7044ef24b07251a4e1b5b311ab214c05f0f2725caf41b8dbc0e4aad1c4f633a.exe
"C:\Users\Admin\AppData\Local\Temp\a7044ef24b07251a4e1b5b311ab214c05f0f2725caf41b8dbc0e4aad1c4f633a.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1872
- C:\Users\Admin\AppData\Local\Temp\kat39DC.tmp
  C:\Users\Admin\AppData\Local\Temp\kat39DC.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:5092

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\kat39DC.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1872-0-0x0000000002360000-0x0000000002361000-memory.dmp

Filesize
4KB

Download
memory/1872-2-0x0000000003FE0000-0x0000000004129000-memory.dmp

Filesize
1.3MB

Download
memory/1872-9-0x0000000000400000-0x000000000060C000-memory.dmp

Filesize
2.0MB

Download
memory/5092-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/5092-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/5092-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/5092-14-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/5092-15-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/5092-17-0x000000001B720000-0x000000001B97F000-memory.dmp

Filesize
2.4MB

Download
memory/5092-32-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/5092-33-0x0000000000400000-0x0000000000646000-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