stealc | b35ac26f3318bbb3881a91e107052f2e239ec7d70d1389b576fd0df91394b754

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
30-06-2024 06:03

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General

Target

b35ac26f3318bbb3881a91e107052f2e239ec7d70d1389b576fd0df91394b754.exe
Size

2.2MB
MD5

024dff98502d2f4f8da0c57038ad21b3
SHA1

77b5f4b639ebf423312018aa006ae7d60864a982
SHA256

b35ac26f3318bbb3881a91e107052f2e239ec7d70d1389b576fd0df91394b754
SHA512

c48685d1ca5ef48cccc6f04efe2bfaa30d72f6f583f0d2b2e6f2d06ea56271fec4d698b34891679ee7d6c4a371a3ffeca021eb72a29746acb580a02d828aa52d
SSDEEP

49152:qpjNvr9ySAOmw4JHHO+SASagXkJr4MDkUwm:qpjNp7p4JHH8n5A

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 8 IoCs

stealer

Processes:

resource	yara_rule
behavioral1/memory/1644-1-0x0000000004030000-0x0000000004140000-memory.dmp	family_vidar_v7
behavioral1/memory/4388-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4388-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4388-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4388-22-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4388-23-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4388-40-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4388-41-0x0000000000400000-0x0000000000648000-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
Downloads MZ/PE file
Executes dropped EXE 1 IoCs

Processes:

kat5A07.tmp

pid process

4388 kat5A07.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:

b35ac26f3318bbb3881a91e107052f2e239ec7d70d1389b576fd0df91394b754.exe

description pid process target process

PID 1644 set thread context of 4388 1644 b35ac26f3318bbb3881a91e107052f2e239ec7d70d1389b576fd0df91394b754.exe kat5A07.tmp

pid	process
4388	kat5A07.tmp

description	pid	process	target process
PID 1644 set thread context of 4388	1644	b35ac26f3318bbb3881a91e107052f2e239ec7d70d1389b576fd0df91394b754.exe	kat5A07.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:

kat5A07.tmp

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	kat5A07.tmp
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat5A07.tmp

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

kat5A07.tmp

pid process

4388 kat5A07.tmp
4388 kat5A07.tmp
4388 kat5A07.tmp
4388 kat5A07.tmp

pid	process
4388	kat5A07.tmp
4388	kat5A07.tmp
4388	kat5A07.tmp
4388	kat5A07.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

b35ac26f3318bbb3881a91e107052f2e239ec7d70d1389b576fd0df91394b754.exe

description	pid	process	target process
PID 1644 wrote to memory of 4388	1644	b35ac26f3318bbb3881a91e107052f2e239ec7d70d1389b576fd0df91394b754.exe	kat5A07.tmp
PID 1644 wrote to memory of 4388	1644	b35ac26f3318bbb3881a91e107052f2e239ec7d70d1389b576fd0df91394b754.exe	kat5A07.tmp
PID 1644 wrote to memory of 4388	1644	b35ac26f3318bbb3881a91e107052f2e239ec7d70d1389b576fd0df91394b754.exe	kat5A07.tmp
PID 1644 wrote to memory of 4388	1644	b35ac26f3318bbb3881a91e107052f2e239ec7d70d1389b576fd0df91394b754.exe	kat5A07.tmp
PID 1644 wrote to memory of 4388	1644	b35ac26f3318bbb3881a91e107052f2e239ec7d70d1389b576fd0df91394b754.exe	kat5A07.tmp
PID 1644 wrote to memory of 4388	1644	b35ac26f3318bbb3881a91e107052f2e239ec7d70d1389b576fd0df91394b754.exe	kat5A07.tmp
PID 1644 wrote to memory of 4388	1644	b35ac26f3318bbb3881a91e107052f2e239ec7d70d1389b576fd0df91394b754.exe	kat5A07.tmp
PID 1644 wrote to memory of 4388	1644	b35ac26f3318bbb3881a91e107052f2e239ec7d70d1389b576fd0df91394b754.exe	kat5A07.tmp

C:\Users\Admin\AppData\Local\Temp\b35ac26f3318bbb3881a91e107052f2e239ec7d70d1389b576fd0df91394b754.exe
"C:\Users\Admin\AppData\Local\Temp\b35ac26f3318bbb3881a91e107052f2e239ec7d70d1389b576fd0df91394b754.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1644

C:\Users\Admin\AppData\Local\Temp\kat5A07.tmp
C:\Users\Admin\AppData\Local\Temp\kat5A07.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:4388

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\kat5A07.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1644-0-0x0000000002290000-0x0000000002291000-memory.dmp

Filesize
4KB

Download
memory/1644-1-0x0000000004030000-0x0000000004140000-memory.dmp

Filesize
1.1MB

Download
memory/1644-10-0x0000000000400000-0x0000000000635000-memory.dmp

Filesize
2.2MB

Download
memory/4388-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4388-9-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4388-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4388-22-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4388-23-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4388-25-0x0000000020200000-0x000000002045F000-memory.dmp

Filesize
2.4MB

Download
memory/4388-40-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4388-41-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download