stealc | 1b6310d4b99134b1c8d8f42eca9c137e9b2ba8a325bc824def53e1f8d5c7234b

General

Target

1b6310d4b99134b1c8d8f42eca9c137e9b2ba8a325bc824def53e1f8d5c7234b.exe
Size

2.0MB
MD5

1b049fe8c40e08c046c049b57df3373d
SHA1

af55dc8970036f67eddb8bc588ba6e0ebe9a6605
SHA256

1b6310d4b99134b1c8d8f42eca9c137e9b2ba8a325bc824def53e1f8d5c7234b
SHA512

0336b2378f7bccf89c6d115820f6f8947a609b0aa7860615fe26cb4dac4bc7a8e553867b32b074000d28f0dee7ec80ff743f90b27480051e04a8a6651175869d
SSDEEP

49152:s4K3x1vUGJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18GtIuoITsdZ

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/1972-3-0x0000000004030000-0x0000000004179000-memory.dmp	family_vidar_v7
behavioral2/memory/3596-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3596-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3596-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3596-19-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3596-20-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3596-37-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3596-38-0x0000000000400000-0x0000000000646000-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:

kat4AE4.tmp

pid process

3596 kat4AE4.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
3596	kat4AE4.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

1b6310d4b99134b1c8d8f42eca9c137e9b2ba8a325bc824def53e1f8d5c7234b.exe

description	pid	process	target process
PID 1972 set thread context of 3596	1972	1b6310d4b99134b1c8d8f42eca9c137e9b2ba8a325bc824def53e1f8d5c7234b.exe	kat4AE4.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:

kat4AE4.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat4AE4.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat4AE4.tmp

pid process

3596 kat4AE4.tmp
3596 kat4AE4.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat4AE4.tmp

pid	process
3596	kat4AE4.tmp
3596	kat4AE4.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

1b6310d4b99134b1c8d8f42eca9c137e9b2ba8a325bc824def53e1f8d5c7234b.exe

description	pid	process	target process
PID 1972 wrote to memory of 3596	1972	1b6310d4b99134b1c8d8f42eca9c137e9b2ba8a325bc824def53e1f8d5c7234b.exe	kat4AE4.tmp
PID 1972 wrote to memory of 3596	1972	1b6310d4b99134b1c8d8f42eca9c137e9b2ba8a325bc824def53e1f8d5c7234b.exe	kat4AE4.tmp
PID 1972 wrote to memory of 3596	1972	1b6310d4b99134b1c8d8f42eca9c137e9b2ba8a325bc824def53e1f8d5c7234b.exe	kat4AE4.tmp
PID 1972 wrote to memory of 3596	1972	1b6310d4b99134b1c8d8f42eca9c137e9b2ba8a325bc824def53e1f8d5c7234b.exe	kat4AE4.tmp
PID 1972 wrote to memory of 3596	1972	1b6310d4b99134b1c8d8f42eca9c137e9b2ba8a325bc824def53e1f8d5c7234b.exe	kat4AE4.tmp
PID 1972 wrote to memory of 3596	1972	1b6310d4b99134b1c8d8f42eca9c137e9b2ba8a325bc824def53e1f8d5c7234b.exe	kat4AE4.tmp
PID 1972 wrote to memory of 3596	1972	1b6310d4b99134b1c8d8f42eca9c137e9b2ba8a325bc824def53e1f8d5c7234b.exe	kat4AE4.tmp
PID 1972 wrote to memory of 3596	1972	1b6310d4b99134b1c8d8f42eca9c137e9b2ba8a325bc824def53e1f8d5c7234b.exe	kat4AE4.tmp

C:\Users\Admin\AppData\Local\Temp\1b6310d4b99134b1c8d8f42eca9c137e9b2ba8a325bc824def53e1f8d5c7234b.exe
"C:\Users\Admin\AppData\Local\Temp\1b6310d4b99134b1c8d8f42eca9c137e9b2ba8a325bc824def53e1f8d5c7234b.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1972

C:\Users\Admin\AppData\Local\Temp\kat4AE4.tmp
C:\Users\Admin\AppData\Local\Temp\kat4AE4.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:3596

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat4AE4.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1972-0-0x0000000002560000-0x0000000002561000-memory.dmp

Filesize
4KB

Download
memory/1972-3-0x0000000004030000-0x0000000004179000-memory.dmp

Filesize
1.3MB

Download
memory/1972-9-0x0000000000400000-0x000000000060C000-memory.dmp

Filesize
2.0MB

Download
memory/3596-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3596-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3596-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3596-19-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3596-20-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3596-22-0x00000000260E0000-0x000000002633F000-memory.dmp

Filesize
2.4MB

Download
memory/3596-37-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3596-38-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads