stealc | 36f5ebad0145e0e91e2d7552c08b9df546cb3a776735481ac49107b97e76ffda

General

Target

36f5ebad0145e0e91e2d7552c08b9df546cb3a776735481ac49107b97e76ffda.exe
Size

2.0MB
MD5

5dd0c0d932410116b293e85fc799566e
SHA1

76396c94ed285a9323c477475b75cb7b5881d446
SHA256

36f5ebad0145e0e91e2d7552c08b9df546cb3a776735481ac49107b97e76ffda
SHA512

643a0fc0f76957fcf0d3b5e434ca8928701ca500c944d6ae8f3db6700ec2026352115e4a52dea1c92ee11daf3993fd653ee9ff636c8dbf2e60266a29d5a3c52e
SSDEEP

49152:OePpQElJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQEltIuoITsdZ

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

Processes:

resource	yara_rule
behavioral2/memory/240-1-0x0000000004060000-0x00000000041A9000-memory.dmp	family_vidar_v7
behavioral2/memory/4172-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4172-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4172-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4172-16-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4172-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4172-34-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4172-35-0x0000000000400000-0x0000000000646000-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

Processes:

kat42F4.tmp

pid process

4172 kat42F4.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

pid	process
4172	kat42F4.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

36f5ebad0145e0e91e2d7552c08b9df546cb3a776735481ac49107b97e76ffda.exe

description	pid	process	target process
PID 240 set thread context of 4172	240	36f5ebad0145e0e91e2d7552c08b9df546cb3a776735481ac49107b97e76ffda.exe	kat42F4.tmp

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

Processes:

kat42F4.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat42F4.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat42F4.tmp

pid process

4172 kat42F4.tmp
4172 kat42F4.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat42F4.tmp

pid	process
4172	kat42F4.tmp
4172	kat42F4.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

36f5ebad0145e0e91e2d7552c08b9df546cb3a776735481ac49107b97e76ffda.exe

description	pid	process	target process
PID 240 wrote to memory of 4172	240	36f5ebad0145e0e91e2d7552c08b9df546cb3a776735481ac49107b97e76ffda.exe	kat42F4.tmp
PID 240 wrote to memory of 4172	240	36f5ebad0145e0e91e2d7552c08b9df546cb3a776735481ac49107b97e76ffda.exe	kat42F4.tmp
PID 240 wrote to memory of 4172	240	36f5ebad0145e0e91e2d7552c08b9df546cb3a776735481ac49107b97e76ffda.exe	kat42F4.tmp
PID 240 wrote to memory of 4172	240	36f5ebad0145e0e91e2d7552c08b9df546cb3a776735481ac49107b97e76ffda.exe	kat42F4.tmp
PID 240 wrote to memory of 4172	240	36f5ebad0145e0e91e2d7552c08b9df546cb3a776735481ac49107b97e76ffda.exe	kat42F4.tmp
PID 240 wrote to memory of 4172	240	36f5ebad0145e0e91e2d7552c08b9df546cb3a776735481ac49107b97e76ffda.exe	kat42F4.tmp
PID 240 wrote to memory of 4172	240	36f5ebad0145e0e91e2d7552c08b9df546cb3a776735481ac49107b97e76ffda.exe	kat42F4.tmp
PID 240 wrote to memory of 4172	240	36f5ebad0145e0e91e2d7552c08b9df546cb3a776735481ac49107b97e76ffda.exe	kat42F4.tmp

C:\Users\Admin\AppData\Local\Temp\36f5ebad0145e0e91e2d7552c08b9df546cb3a776735481ac49107b97e76ffda.exe
"C:\Users\Admin\AppData\Local\Temp\36f5ebad0145e0e91e2d7552c08b9df546cb3a776735481ac49107b97e76ffda.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:240

C:\Users\Admin\AppData\Local\Temp\kat42F4.tmp
C:\Users\Admin\AppData\Local\Temp\kat42F4.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:4172

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\kat42F4.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/240-0-0x0000000002370000-0x0000000002371000-memory.dmp

Filesize
4KB

Download
memory/240-1-0x0000000004060000-0x00000000041A9000-memory.dmp

Filesize
1.3MB

Download
memory/240-10-0x0000000000400000-0x0000000000612000-memory.dmp

Filesize
2.1MB

Download
memory/4172-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4172-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4172-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4172-16-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4172-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4172-19-0x000000001B830000-0x000000001BA8F000-memory.dmp

Filesize
2.4MB

Download
memory/4172-34-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4172-35-0x0000000000400000-0x0000000000646000-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