stealc | 52c37c88a0551aae67d3a772564e9d48b06ecc875c9e86c16f161a47c83da969

Analysis

max time kernel
79s
max time network
102s
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 20:27

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General

Target

52c37c88a0551aae67d3a772564e9d48b06ecc875c9e86c16f161a47c83da969.exe
Size

2.2MB
MD5

0aecad6bb8ce263af80ebd55902b6c5a
SHA1

1f4cd5a93f8cd7a55cd14b65ca6c027cedcb134c
SHA256

52c37c88a0551aae67d3a772564e9d48b06ecc875c9e86c16f161a47c83da969
SHA512

16815f2977b5c9f01565ecf8b660e55f8d0338bce25e28eea0a592ca448b7574f6e791c82104e8940036b6500eec0eba3b5f1757f83b7d85af3c71184c6ab889
SSDEEP

24576:Uc0PyhhGkCI1wUL24jtYkYGbawg757CgXueAgX/QU2MZQti1u8LnsDJY6WpEYGYG:UJ0hsA91MPX21tuuIeNHYGY0LzjsJxK

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/4864-1-0x0000000004140000-0x0000000004253000-memory.dmp	family_vidar_v7
behavioral1/memory/4252-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4252-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4252-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4252-11-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4252-12-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4252-13-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4252-14-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4252-15-0x0000000000400000-0x0000000000648000-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:

kat3C7C.tmp

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation kat3C7C.tmp
Executes dropped EXE 1 IoCs

Processes:

kat3C7C.tmp

pid process

4252 kat3C7C.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:

52c37c88a0551aae67d3a772564e9d48b06ecc875c9e86c16f161a47c83da969.exe

description pid process target process

PID 4864 set thread context of 4252 4864 52c37c88a0551aae67d3a772564e9d48b06ecc875c9e86c16f161a47c83da969.exe kat3C7C.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-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	kat3C7C.tmp

pid	process
4252	kat3C7C.tmp

description	pid	process	target process
PID 4864 set thread context of 4252	4864	52c37c88a0551aae67d3a772564e9d48b06ecc875c9e86c16f161a47c83da969.exe	kat3C7C.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:

kat3C7C.tmp

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	kat3C7C.tmp
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat3C7C.tmp

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

4612 timeout.exe
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

kat3C7C.tmp

pid process

4252 kat3C7C.tmp
4252 kat3C7C.tmp
4252 kat3C7C.tmp
4252 kat3C7C.tmp
4252 kat3C7C.tmp
4252 kat3C7C.tmp

pid	process
4612	timeout.exe

pid	process
4252	kat3C7C.tmp
4252	kat3C7C.tmp
4252	kat3C7C.tmp
4252	kat3C7C.tmp
4252	kat3C7C.tmp
4252	kat3C7C.tmp

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

52c37c88a0551aae67d3a772564e9d48b06ecc875c9e86c16f161a47c83da969.exekat3C7C.tmpcmd.exe

description	pid	process	target process
PID 4864 wrote to memory of 4252	4864	52c37c88a0551aae67d3a772564e9d48b06ecc875c9e86c16f161a47c83da969.exe	kat3C7C.tmp
PID 4864 wrote to memory of 4252	4864	52c37c88a0551aae67d3a772564e9d48b06ecc875c9e86c16f161a47c83da969.exe	kat3C7C.tmp
PID 4864 wrote to memory of 4252	4864	52c37c88a0551aae67d3a772564e9d48b06ecc875c9e86c16f161a47c83da969.exe	kat3C7C.tmp
PID 4864 wrote to memory of 4252	4864	52c37c88a0551aae67d3a772564e9d48b06ecc875c9e86c16f161a47c83da969.exe	kat3C7C.tmp
PID 4864 wrote to memory of 4252	4864	52c37c88a0551aae67d3a772564e9d48b06ecc875c9e86c16f161a47c83da969.exe	kat3C7C.tmp
PID 4864 wrote to memory of 4252	4864	52c37c88a0551aae67d3a772564e9d48b06ecc875c9e86c16f161a47c83da969.exe	kat3C7C.tmp
PID 4864 wrote to memory of 4252	4864	52c37c88a0551aae67d3a772564e9d48b06ecc875c9e86c16f161a47c83da969.exe	kat3C7C.tmp
PID 4864 wrote to memory of 4252	4864	52c37c88a0551aae67d3a772564e9d48b06ecc875c9e86c16f161a47c83da969.exe	kat3C7C.tmp
PID 4252 wrote to memory of 1756	4252	kat3C7C.tmp	cmd.exe
PID 4252 wrote to memory of 1756	4252	kat3C7C.tmp	cmd.exe
PID 4252 wrote to memory of 1756	4252	kat3C7C.tmp	cmd.exe
PID 1756 wrote to memory of 4612	1756	cmd.exe	timeout.exe
PID 1756 wrote to memory of 4612	1756	cmd.exe	timeout.exe
PID 1756 wrote to memory of 4612	1756	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\52c37c88a0551aae67d3a772564e9d48b06ecc875c9e86c16f161a47c83da969.exe
"C:\Users\Admin\AppData\Local\Temp\52c37c88a0551aae67d3a772564e9d48b06ecc875c9e86c16f161a47c83da969.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4864

C:\Users\Admin\AppData\Local\Temp\kat3C7C.tmp
C:\Users\Admin\AppData\Local\Temp\kat3C7C.tmp
2⤵
- Checks computer location settings
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4252

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\system32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat3C7C.tmp" & rd /s /q "C:\ProgramData\AFHDAEGHDGDB" & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:1756

C:\Windows\SysWOW64\timeout.exe
timeout /t 10
4⤵
- Delays execution with timeout.exe
PID:4612

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\kat3C7C.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/4252-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4252-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4252-10-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4252-11-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4252-12-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4252-13-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4252-14-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4252-15-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4864-0-0x0000000000820000-0x0000000000821000-memory.dmp

Filesize
4KB

Download
memory/4864-1-0x0000000004140000-0x0000000004253000-memory.dmp

Filesize
1.1MB

Download
memory/4864-9-0x0000000000400000-0x0000000000641000-memory.dmp

Filesize
2.3MB

Download