stealc | 6cb09916c5a8464778c43a5372fe483b53e9c53f0867ec252667f109a58020d3

Analysis

max time kernel
95s
max time network
139s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
29-06-2024 14:26

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General

Target

6cb09916c5a8464778c43a5372fe483b53e9c53f0867ec252667f109a58020d3.exe
Size

2.2MB
MD5

b3cc7a18b297581b1be5af68698f98c8
SHA1

8882af8407761782d09c6224defb5d335c3770ac
SHA256

6cb09916c5a8464778c43a5372fe483b53e9c53f0867ec252667f109a58020d3
SHA512

a84316d63c5887a85a28c273d25f3ae95a4c06a66883c70fa2fd9b33cecca3b039e7f56c9371308aa16c85313017038f0e23daa55fee04ebb0cd86bc1bbd29b3
SSDEEP

49152:qpjNvr9ySAOmw49HHO+SASagXkJr4MDkUwm:qpjNp7p49HH8n5A

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

vidar

https://t.me/g067n

https://steamcommunity.com/profiles/76561199707802586

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:129.0) Gecko/20100101 Firefox/129.0

Signatures

Detect Vidar Stealer 11 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/1596-1-0x00000000040F0000-0x0000000004200000-memory.dmp	family_vidar_v7
behavioral2/memory/4376-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4376-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4376-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4376-11-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4376-21-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4376-24-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4376-25-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4376-26-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4376-27-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4376-30-0x0000000000400000-0x0000000000648000-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
Executes dropped EXE 1 IoCs

Processes:

kat3E22.tmp

pid process

4376 kat3E22.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

Processes:

6cb09916c5a8464778c43a5372fe483b53e9c53f0867ec252667f109a58020d3.exe

description pid process target process

PID 1596 set thread context of 4376 1596 6cb09916c5a8464778c43a5372fe483b53e9c53f0867ec252667f109a58020d3.exe kat3E22.tmp
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

2560 4376 WerFault.exe kat3E22.tmp

pid	process
4376	kat3E22.tmp

description	pid	process	target process
PID 1596 set thread context of 4376	1596	6cb09916c5a8464778c43a5372fe483b53e9c53f0867ec252667f109a58020d3.exe	kat3E22.tmp

pid	pid_target	process	target process
2560	4376	WerFault.exe	kat3E22.tmp

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

kat3E22.tmp

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	kat3E22.tmp
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat3E22.tmp

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

kat3E22.tmp

pid process

4376 kat3E22.tmp
4376 kat3E22.tmp
4376 kat3E22.tmp
4376 kat3E22.tmp

pid	process
4376	kat3E22.tmp
4376	kat3E22.tmp
4376	kat3E22.tmp
4376	kat3E22.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

6cb09916c5a8464778c43a5372fe483b53e9c53f0867ec252667f109a58020d3.exe

description	pid	process	target process
PID 1596 wrote to memory of 4376	1596	6cb09916c5a8464778c43a5372fe483b53e9c53f0867ec252667f109a58020d3.exe	kat3E22.tmp
PID 1596 wrote to memory of 4376	1596	6cb09916c5a8464778c43a5372fe483b53e9c53f0867ec252667f109a58020d3.exe	kat3E22.tmp
PID 1596 wrote to memory of 4376	1596	6cb09916c5a8464778c43a5372fe483b53e9c53f0867ec252667f109a58020d3.exe	kat3E22.tmp
PID 1596 wrote to memory of 4376	1596	6cb09916c5a8464778c43a5372fe483b53e9c53f0867ec252667f109a58020d3.exe	kat3E22.tmp
PID 1596 wrote to memory of 4376	1596	6cb09916c5a8464778c43a5372fe483b53e9c53f0867ec252667f109a58020d3.exe	kat3E22.tmp
PID 1596 wrote to memory of 4376	1596	6cb09916c5a8464778c43a5372fe483b53e9c53f0867ec252667f109a58020d3.exe	kat3E22.tmp
PID 1596 wrote to memory of 4376	1596	6cb09916c5a8464778c43a5372fe483b53e9c53f0867ec252667f109a58020d3.exe	kat3E22.tmp
PID 1596 wrote to memory of 4376	1596	6cb09916c5a8464778c43a5372fe483b53e9c53f0867ec252667f109a58020d3.exe	kat3E22.tmp

C:\Users\Admin\AppData\Local\Temp\6cb09916c5a8464778c43a5372fe483b53e9c53f0867ec252667f109a58020d3.exe
"C:\Users\Admin\AppData\Local\Temp\6cb09916c5a8464778c43a5372fe483b53e9c53f0867ec252667f109a58020d3.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1596

C:\Users\Admin\AppData\Local\Temp\kat3E22.tmp
C:\Users\Admin\AppData\Local\Temp\kat3E22.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:4376

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4376 -s 2340
3⤵
- Program crash
PID:2560

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4376 -ip 4376
1⤵
PID:4584

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat3E22.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1596-9-0x0000000000400000-0x0000000000635000-memory.dmp

Filesize
2.2MB

Download
memory/1596-1-0x00000000040F0000-0x0000000004200000-memory.dmp

Filesize
1.1MB

Download
memory/1596-0-0x00000000007F0000-0x00000000007F1000-memory.dmp

Filesize
4KB

Download
memory/4376-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4376-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4376-10-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4376-11-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4376-21-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4376-24-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4376-25-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4376-26-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4376-27-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4376-30-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download