stealc | 8a73d034013ed0c99d26cfd768c0e970399162a7465ed6cf42bd259d066d5f99

Analysis

max time kernel
39s
max time network
48s
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 23:03

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General

Target

8a73d034013ed0c99d26cfd768c0e970399162a7465ed6cf42bd259d066d5f99.exe
Size

2.2MB
MD5

85c2589ca5a32aa2dc571bd77bfc91d8
SHA1

4c636a436f2d39429c131c5ff68223de9d2b700d
SHA256

8a73d034013ed0c99d26cfd768c0e970399162a7465ed6cf42bd259d066d5f99
SHA512

3552dfb6ff606fd4ded03071f976856e523cadc217c7aa48982b139e9cf6ef72c7763fff8e015bb8b00272b476e3d45bdad9ab87172f19f5d8906711871dca4a
SSDEEP

49152:qpjNvr9ySAOmw4pHHO+SASagXkJr4MDkUwm:qpjNp7p4pHH8n5A

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/1900-2-0x0000000004000000-0x0000000004110000-memory.dmp	family_vidar_v7
behavioral1/memory/4440-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4440-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4440-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4440-11-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4440-12-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4440-13-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4440-14-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4440-15-0x0000000000400000-0x0000000000648000-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:

kat5321.tmp

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation kat5321.tmp
Executes dropped EXE 1 IoCs

Processes:

kat5321.tmp

pid process

4440 kat5321.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:

8a73d034013ed0c99d26cfd768c0e970399162a7465ed6cf42bd259d066d5f99.exe

description pid process target process

PID 1900 set thread context of 4440 1900 8a73d034013ed0c99d26cfd768c0e970399162a7465ed6cf42bd259d066d5f99.exe kat5321.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	kat5321.tmp

pid	process
4440	kat5321.tmp

description	pid	process	target process
PID 1900 set thread context of 4440	1900	8a73d034013ed0c99d26cfd768c0e970399162a7465ed6cf42bd259d066d5f99.exe	kat5321.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:

kat5321.tmp

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	kat5321.tmp
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat5321.tmp

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

3248 timeout.exe
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

kat5321.tmp

pid process

4440 kat5321.tmp
4440 kat5321.tmp
4440 kat5321.tmp
4440 kat5321.tmp
4440 kat5321.tmp
4440 kat5321.tmp

pid	process
3248	timeout.exe

pid	process
4440	kat5321.tmp
4440	kat5321.tmp
4440	kat5321.tmp
4440	kat5321.tmp
4440	kat5321.tmp
4440	kat5321.tmp

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

8a73d034013ed0c99d26cfd768c0e970399162a7465ed6cf42bd259d066d5f99.exekat5321.tmpcmd.exe

description	pid	process	target process
PID 1900 wrote to memory of 4440	1900	8a73d034013ed0c99d26cfd768c0e970399162a7465ed6cf42bd259d066d5f99.exe	kat5321.tmp
PID 1900 wrote to memory of 4440	1900	8a73d034013ed0c99d26cfd768c0e970399162a7465ed6cf42bd259d066d5f99.exe	kat5321.tmp
PID 1900 wrote to memory of 4440	1900	8a73d034013ed0c99d26cfd768c0e970399162a7465ed6cf42bd259d066d5f99.exe	kat5321.tmp
PID 1900 wrote to memory of 4440	1900	8a73d034013ed0c99d26cfd768c0e970399162a7465ed6cf42bd259d066d5f99.exe	kat5321.tmp
PID 1900 wrote to memory of 4440	1900	8a73d034013ed0c99d26cfd768c0e970399162a7465ed6cf42bd259d066d5f99.exe	kat5321.tmp
PID 1900 wrote to memory of 4440	1900	8a73d034013ed0c99d26cfd768c0e970399162a7465ed6cf42bd259d066d5f99.exe	kat5321.tmp
PID 1900 wrote to memory of 4440	1900	8a73d034013ed0c99d26cfd768c0e970399162a7465ed6cf42bd259d066d5f99.exe	kat5321.tmp
PID 1900 wrote to memory of 4440	1900	8a73d034013ed0c99d26cfd768c0e970399162a7465ed6cf42bd259d066d5f99.exe	kat5321.tmp
PID 4440 wrote to memory of 3528	4440	kat5321.tmp	cmd.exe
PID 4440 wrote to memory of 3528	4440	kat5321.tmp	cmd.exe
PID 4440 wrote to memory of 3528	4440	kat5321.tmp	cmd.exe
PID 3528 wrote to memory of 3248	3528	cmd.exe	timeout.exe
PID 3528 wrote to memory of 3248	3528	cmd.exe	timeout.exe
PID 3528 wrote to memory of 3248	3528	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\8a73d034013ed0c99d26cfd768c0e970399162a7465ed6cf42bd259d066d5f99.exe
"C:\Users\Admin\AppData\Local\Temp\8a73d034013ed0c99d26cfd768c0e970399162a7465ed6cf42bd259d066d5f99.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1900

C:\Users\Admin\AppData\Local\Temp\kat5321.tmp
C:\Users\Admin\AppData\Local\Temp\kat5321.tmp
2⤵
- Checks computer location settings
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4440

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\system32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat5321.tmp" & rd /s /q "C:\ProgramData\CGIDAAAKJJDB" & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:3528

C:\Windows\SysWOW64\timeout.exe
timeout /t 10
4⤵
- Delays execution with timeout.exe
PID:3248

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\kat5321.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1900-0-0x0000000000A00000-0x0000000000A01000-memory.dmp

Filesize
4KB

Download
memory/1900-2-0x0000000004000000-0x0000000004110000-memory.dmp

Filesize
1.1MB

Download
memory/1900-10-0x0000000000400000-0x0000000000635000-memory.dmp

Filesize
2.2MB

Download
memory/4440-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4440-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4440-9-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4440-11-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4440-12-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4440-13-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4440-14-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4440-15-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download