stealc | afc1e1acef884ba79e0c1adb6f421189fe6aff02c6d5cafd7f2322582438444c

Analysis

max time kernel
41s
max time network
47s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
01-07-2024 03:50

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General

Target

afc1e1acef884ba79e0c1adb6f421189fe6aff02c6d5cafd7f2322582438444c.exe
Size

2.2MB
MD5

c6fb62b9d6a6275005bc742578a4c92d
SHA1

f096d4b48ced3d3b03d8c00e920d0e464da0f2c4
SHA256

afc1e1acef884ba79e0c1adb6f421189fe6aff02c6d5cafd7f2322582438444c
SHA512

4dc9d8b84d8ccf5c17f19a05db91e4544a6a990110f0db4da3e20850d96056b1fba3d3a2677abdff39ca93b72b99f0178e652ed46664bf6b8d7e1749621cc2d3
SSDEEP

24576:Uc0PyhhGkCI1wUL24jtYkYGbawg757CgXueAgX/8U2MZQti1u8LnsDJY6WpEYGYG:UJ0hsA91MPb21tuuIeNHYGY0LzjsJxK

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 9 IoCs

stealer

Processes:

resource	yara_rule
behavioral1/memory/372-1-0x00000000040B0000-0x00000000041C3000-memory.dmp	family_vidar_v7
behavioral1/memory/4936-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4936-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4936-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4936-11-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4936-12-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4936-13-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4936-14-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4936-15-0x0000000000400000-0x0000000000648000-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
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.

Query Registry
T1012

System Information Discovery
T1082

Processes:

kat5534.tmp

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation kat5534.tmp
Executes dropped EXE 1 IoCs

Processes:

kat5534.tmp

pid process

4936 kat5534.tmp
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
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:

afc1e1acef884ba79e0c1adb6f421189fe6aff02c6d5cafd7f2322582438444c.exe

description pid process target process

PID 372 set thread context of 4936 372 afc1e1acef884ba79e0c1adb6f421189fe6aff02c6d5cafd7f2322582438444c.exe kat5534.tmp
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	kat5534.tmp

pid	process
4936	kat5534.tmp

description	pid	process	target process
PID 372 set thread context of 4936	372	afc1e1acef884ba79e0c1adb6f421189fe6aff02c6d5cafd7f2322582438444c.exe	kat5534.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:

kat5534.tmp

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	kat5534.tmp
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat5534.tmp

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

3008 timeout.exe
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

kat5534.tmp

pid process

4936 kat5534.tmp
4936 kat5534.tmp
4936 kat5534.tmp
4936 kat5534.tmp
4936 kat5534.tmp
4936 kat5534.tmp

pid	process
3008	timeout.exe

pid	process
4936	kat5534.tmp
4936	kat5534.tmp
4936	kat5534.tmp
4936	kat5534.tmp
4936	kat5534.tmp
4936	kat5534.tmp

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

afc1e1acef884ba79e0c1adb6f421189fe6aff02c6d5cafd7f2322582438444c.exekat5534.tmpcmd.exe

description	pid	process	target process
PID 372 wrote to memory of 4936	372	afc1e1acef884ba79e0c1adb6f421189fe6aff02c6d5cafd7f2322582438444c.exe	kat5534.tmp
PID 372 wrote to memory of 4936	372	afc1e1acef884ba79e0c1adb6f421189fe6aff02c6d5cafd7f2322582438444c.exe	kat5534.tmp
PID 372 wrote to memory of 4936	372	afc1e1acef884ba79e0c1adb6f421189fe6aff02c6d5cafd7f2322582438444c.exe	kat5534.tmp
PID 372 wrote to memory of 4936	372	afc1e1acef884ba79e0c1adb6f421189fe6aff02c6d5cafd7f2322582438444c.exe	kat5534.tmp
PID 372 wrote to memory of 4936	372	afc1e1acef884ba79e0c1adb6f421189fe6aff02c6d5cafd7f2322582438444c.exe	kat5534.tmp
PID 372 wrote to memory of 4936	372	afc1e1acef884ba79e0c1adb6f421189fe6aff02c6d5cafd7f2322582438444c.exe	kat5534.tmp
PID 372 wrote to memory of 4936	372	afc1e1acef884ba79e0c1adb6f421189fe6aff02c6d5cafd7f2322582438444c.exe	kat5534.tmp
PID 372 wrote to memory of 4936	372	afc1e1acef884ba79e0c1adb6f421189fe6aff02c6d5cafd7f2322582438444c.exe	kat5534.tmp
PID 4936 wrote to memory of 4040	4936	kat5534.tmp	cmd.exe
PID 4936 wrote to memory of 4040	4936	kat5534.tmp	cmd.exe
PID 4936 wrote to memory of 4040	4936	kat5534.tmp	cmd.exe
PID 4040 wrote to memory of 3008	4040	cmd.exe	timeout.exe
PID 4040 wrote to memory of 3008	4040	cmd.exe	timeout.exe
PID 4040 wrote to memory of 3008	4040	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\afc1e1acef884ba79e0c1adb6f421189fe6aff02c6d5cafd7f2322582438444c.exe
"C:\Users\Admin\AppData\Local\Temp\afc1e1acef884ba79e0c1adb6f421189fe6aff02c6d5cafd7f2322582438444c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:372

C:\Users\Admin\AppData\Local\Temp\kat5534.tmp
C:\Users\Admin\AppData\Local\Temp\kat5534.tmp
2⤵
- Checks computer location settings
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4936

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\system32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat5534.tmp" & rd /s /q "C:\ProgramData\DBFHDBGIEBFI" & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:4040

C:\Windows\SysWOW64\timeout.exe
timeout /t 10
4⤵
- Delays execution with timeout.exe
PID:3008

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\kat5534.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/372-0-0x0000000000800000-0x0000000000801000-memory.dmp

Filesize
4KB

Download
memory/372-1-0x00000000040B0000-0x00000000041C3000-memory.dmp

Filesize
1.1MB

Download
memory/372-9-0x0000000000400000-0x0000000000641000-memory.dmp

Filesize
2.3MB

Download
memory/4936-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4936-10-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4936-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4936-11-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4936-12-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4936-13-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4936-14-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4936-15-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download