stealc | b6b334165e7e8327766b33cdfcb9a0c48ea4872c1186732ecf048ca5bb80f62a

General

Target

b6b334165e7e8327766b33cdfcb9a0c48ea4872c1186732ecf048ca5bb80f62a.exe
Size

2.0MB
MD5

6217796f6f79ddc7810bf8e4ca36f5f1
SHA1

4bae5ef53e6812994051fa0aa68d799ceab9b237
SHA256

b6b334165e7e8327766b33cdfcb9a0c48ea4872c1186732ecf048ca5bb80f62a
SHA512

013204d6b46a4e810b39222c9d50a14ad831071d3decb2b4881f9bf89346916929a6fabf17854313019a3e0d3c17e4ec6171668d855ebbf80f6d8673cafed108
SSDEEP

49152:7QzHt472DDJtTF+TxMoxc1TU+j+dAzGwlrh:7QzHtJtIuoITsdZ

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 8 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/2808-2-0x0000000004210000-0x0000000004359000-memory.dmp	family_vidar_v7
behavioral2/memory/5060-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/5060-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/5060-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/5060-14-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/5060-15-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/5060-32-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/5060-33-0x0000000000400000-0x0000000000646000-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

Processes:

kat7C92.tmp

pid process

5060 kat7C92.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
5060	kat7C92.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

b6b334165e7e8327766b33cdfcb9a0c48ea4872c1186732ecf048ca5bb80f62a.exe

description	pid	process	target process
PID 2808 set thread context of 5060	2808	b6b334165e7e8327766b33cdfcb9a0c48ea4872c1186732ecf048ca5bb80f62a.exe	kat7C92.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:

kat7C92.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat7C92.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat7C92.tmp

pid process

5060 kat7C92.tmp
5060 kat7C92.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat7C92.tmp

pid	process
5060	kat7C92.tmp
5060	kat7C92.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

b6b334165e7e8327766b33cdfcb9a0c48ea4872c1186732ecf048ca5bb80f62a.exe

description	pid	process	target process
PID 2808 wrote to memory of 5060	2808	b6b334165e7e8327766b33cdfcb9a0c48ea4872c1186732ecf048ca5bb80f62a.exe	kat7C92.tmp
PID 2808 wrote to memory of 5060	2808	b6b334165e7e8327766b33cdfcb9a0c48ea4872c1186732ecf048ca5bb80f62a.exe	kat7C92.tmp
PID 2808 wrote to memory of 5060	2808	b6b334165e7e8327766b33cdfcb9a0c48ea4872c1186732ecf048ca5bb80f62a.exe	kat7C92.tmp
PID 2808 wrote to memory of 5060	2808	b6b334165e7e8327766b33cdfcb9a0c48ea4872c1186732ecf048ca5bb80f62a.exe	kat7C92.tmp
PID 2808 wrote to memory of 5060	2808	b6b334165e7e8327766b33cdfcb9a0c48ea4872c1186732ecf048ca5bb80f62a.exe	kat7C92.tmp
PID 2808 wrote to memory of 5060	2808	b6b334165e7e8327766b33cdfcb9a0c48ea4872c1186732ecf048ca5bb80f62a.exe	kat7C92.tmp
PID 2808 wrote to memory of 5060	2808	b6b334165e7e8327766b33cdfcb9a0c48ea4872c1186732ecf048ca5bb80f62a.exe	kat7C92.tmp
PID 2808 wrote to memory of 5060	2808	b6b334165e7e8327766b33cdfcb9a0c48ea4872c1186732ecf048ca5bb80f62a.exe	kat7C92.tmp

C:\Users\Admin\AppData\Local\Temp\b6b334165e7e8327766b33cdfcb9a0c48ea4872c1186732ecf048ca5bb80f62a.exe
"C:\Users\Admin\AppData\Local\Temp\b6b334165e7e8327766b33cdfcb9a0c48ea4872c1186732ecf048ca5bb80f62a.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2808

C:\Users\Admin\AppData\Local\Temp\kat7C92.tmp
C:\Users\Admin\AppData\Local\Temp\kat7C92.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:5060

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat7C92.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2808-0-0x0000000000900000-0x0000000000901000-memory.dmp

Filesize
4KB

Download
memory/2808-2-0x0000000004210000-0x0000000004359000-memory.dmp

Filesize
1.3MB

Download
memory/2808-9-0x0000000000400000-0x0000000000601000-memory.dmp

Filesize
2.0MB

Download
memory/5060-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/5060-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/5060-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/5060-14-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/5060-15-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/5060-17-0x000000001B780000-0x000000001B9DF000-memory.dmp

Filesize
2.4MB

Download
memory/5060-32-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/5060-33-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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