stealc | 1acf7c7e3a0d489ff7f2781be4343e3c4ab2a547c033ebf723c2c45ae8eec611

General

Target

1acf7c7e3a0d489ff7f2781be4343e3c4ab2a547c033ebf723c2c45ae8eec611.exe
Size

2.0MB
MD5

48c0006e7404ef17ed528ffe20ee101d
SHA1

a3572b5c66ee4b3088d88125454bfa6a4882e39a
SHA256

1acf7c7e3a0d489ff7f2781be4343e3c4ab2a547c033ebf723c2c45ae8eec611
SHA512

b4883765f886a70cfd1085bdde52e33a91fb34cacb58758cd9fda4812df856f44f3a1c8848dadb53cacd1ac073e894ca901eccfdb7584f29da981edab1809662
SSDEEP

49152:s4K3x1vU6JtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex186tIuoITsdZ

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/1856-2-0x0000000004070000-0x00000000041B9000-memory.dmp	family_vidar_v7
behavioral2/memory/4056-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4056-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4056-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4056-16-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4056-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4056-34-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4056-35-0x0000000000400000-0x0000000000646000-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:

kat7177.tmp

pid process

4056 kat7177.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
4056	kat7177.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

1acf7c7e3a0d489ff7f2781be4343e3c4ab2a547c033ebf723c2c45ae8eec611.exe

description	pid	process	target process
PID 1856 set thread context of 4056	1856	1acf7c7e3a0d489ff7f2781be4343e3c4ab2a547c033ebf723c2c45ae8eec611.exe	kat7177.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:

kat7177.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat7177.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat7177.tmp

pid process

4056 kat7177.tmp
4056 kat7177.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat7177.tmp

pid	process
4056	kat7177.tmp
4056	kat7177.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

1acf7c7e3a0d489ff7f2781be4343e3c4ab2a547c033ebf723c2c45ae8eec611.exe

description	pid	process	target process
PID 1856 wrote to memory of 4056	1856	1acf7c7e3a0d489ff7f2781be4343e3c4ab2a547c033ebf723c2c45ae8eec611.exe	kat7177.tmp
PID 1856 wrote to memory of 4056	1856	1acf7c7e3a0d489ff7f2781be4343e3c4ab2a547c033ebf723c2c45ae8eec611.exe	kat7177.tmp
PID 1856 wrote to memory of 4056	1856	1acf7c7e3a0d489ff7f2781be4343e3c4ab2a547c033ebf723c2c45ae8eec611.exe	kat7177.tmp
PID 1856 wrote to memory of 4056	1856	1acf7c7e3a0d489ff7f2781be4343e3c4ab2a547c033ebf723c2c45ae8eec611.exe	kat7177.tmp
PID 1856 wrote to memory of 4056	1856	1acf7c7e3a0d489ff7f2781be4343e3c4ab2a547c033ebf723c2c45ae8eec611.exe	kat7177.tmp
PID 1856 wrote to memory of 4056	1856	1acf7c7e3a0d489ff7f2781be4343e3c4ab2a547c033ebf723c2c45ae8eec611.exe	kat7177.tmp
PID 1856 wrote to memory of 4056	1856	1acf7c7e3a0d489ff7f2781be4343e3c4ab2a547c033ebf723c2c45ae8eec611.exe	kat7177.tmp
PID 1856 wrote to memory of 4056	1856	1acf7c7e3a0d489ff7f2781be4343e3c4ab2a547c033ebf723c2c45ae8eec611.exe	kat7177.tmp

C:\Users\Admin\AppData\Local\Temp\1acf7c7e3a0d489ff7f2781be4343e3c4ab2a547c033ebf723c2c45ae8eec611.exe
"C:\Users\Admin\AppData\Local\Temp\1acf7c7e3a0d489ff7f2781be4343e3c4ab2a547c033ebf723c2c45ae8eec611.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1856
- C:\Users\Admin\AppData\Local\Temp\kat7177.tmp
  C:\Users\Admin\AppData\Local\Temp\kat7177.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:4056

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\kat7177.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1856-0-0x0000000002340000-0x0000000002341000-memory.dmp

Filesize
4KB

Download
memory/1856-2-0x0000000004070000-0x00000000041B9000-memory.dmp

Filesize
1.3MB

Download
memory/1856-10-0x0000000000400000-0x000000000060C000-memory.dmp

Filesize
2.0MB

Download
memory/4056-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4056-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4056-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4056-16-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4056-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4056-19-0x000000001B7F0000-0x000000001BA4F000-memory.dmp

Filesize
2.4MB

Download
memory/4056-34-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4056-35-0x0000000000400000-0x0000000000646000-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