stealc | b53144e47aeb73e100c7f0d74d5c9739cc3ecf07c2ff915f3571aad94822293e

Analysis

max time kernel
41s
max time network
50s
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 01:46

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General

Target

b53144e47aeb73e100c7f0d74d5c9739cc3ecf07c2ff915f3571aad94822293e.exe
Size

2.2MB
MD5

1a7c7c20a178ef66403ea8d77af99506
SHA1

74189153fff6d6ac7472f9167b328c479fe62edc
SHA256

b53144e47aeb73e100c7f0d74d5c9739cc3ecf07c2ff915f3571aad94822293e
SHA512

dceb679f5f5a6f94110976ad68c4bb9425a9ff5fd56e0b4a822414bde33a2ecfcb2f106091fcb78f087f2d506093b3fd9f48d7a31ce0a66da17b661848611d0d
SSDEEP

24576:Uc0PyhhGkCI1wUL24jtYkYGbawg757CgXueAgXTjU2MZQti1u8LnsDJY6WpEYGYG:UJ0hsA91MPk21tuuIeNHYGY0LzjsJxK

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/1488-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/1488-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/1488-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/1296-2-0x0000000004180000-0x0000000004293000-memory.dmp	family_vidar_v7
behavioral1/memory/1488-11-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/1488-12-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/1488-14-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/1488-13-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/1488-15-0x0000000000400000-0x0000000000648000-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:

kat5C39.tmp

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation kat5C39.tmp
Executes dropped EXE 1 IoCs

Processes:

kat5C39.tmp

pid process

1488 kat5C39.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:

b53144e47aeb73e100c7f0d74d5c9739cc3ecf07c2ff915f3571aad94822293e.exe

description pid process target process

PID 1296 set thread context of 1488 1296 b53144e47aeb73e100c7f0d74d5c9739cc3ecf07c2ff915f3571aad94822293e.exe kat5C39.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	kat5C39.tmp

pid	process
1488	kat5C39.tmp

description	pid	process	target process
PID 1296 set thread context of 1488	1296	b53144e47aeb73e100c7f0d74d5c9739cc3ecf07c2ff915f3571aad94822293e.exe	kat5C39.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:

kat5C39.tmp

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	kat5C39.tmp
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat5C39.tmp

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

3236 timeout.exe
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

kat5C39.tmp

pid process

1488 kat5C39.tmp
1488 kat5C39.tmp
1488 kat5C39.tmp
1488 kat5C39.tmp
1488 kat5C39.tmp
1488 kat5C39.tmp

pid	process
3236	timeout.exe

pid	process
1488	kat5C39.tmp
1488	kat5C39.tmp
1488	kat5C39.tmp
1488	kat5C39.tmp
1488	kat5C39.tmp
1488	kat5C39.tmp

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

b53144e47aeb73e100c7f0d74d5c9739cc3ecf07c2ff915f3571aad94822293e.exekat5C39.tmpcmd.exe

description	pid	process	target process
PID 1296 wrote to memory of 1488	1296	b53144e47aeb73e100c7f0d74d5c9739cc3ecf07c2ff915f3571aad94822293e.exe	kat5C39.tmp
PID 1296 wrote to memory of 1488	1296	b53144e47aeb73e100c7f0d74d5c9739cc3ecf07c2ff915f3571aad94822293e.exe	kat5C39.tmp
PID 1296 wrote to memory of 1488	1296	b53144e47aeb73e100c7f0d74d5c9739cc3ecf07c2ff915f3571aad94822293e.exe	kat5C39.tmp
PID 1296 wrote to memory of 1488	1296	b53144e47aeb73e100c7f0d74d5c9739cc3ecf07c2ff915f3571aad94822293e.exe	kat5C39.tmp
PID 1296 wrote to memory of 1488	1296	b53144e47aeb73e100c7f0d74d5c9739cc3ecf07c2ff915f3571aad94822293e.exe	kat5C39.tmp
PID 1296 wrote to memory of 1488	1296	b53144e47aeb73e100c7f0d74d5c9739cc3ecf07c2ff915f3571aad94822293e.exe	kat5C39.tmp
PID 1296 wrote to memory of 1488	1296	b53144e47aeb73e100c7f0d74d5c9739cc3ecf07c2ff915f3571aad94822293e.exe	kat5C39.tmp
PID 1296 wrote to memory of 1488	1296	b53144e47aeb73e100c7f0d74d5c9739cc3ecf07c2ff915f3571aad94822293e.exe	kat5C39.tmp
PID 1488 wrote to memory of 1308	1488	kat5C39.tmp	cmd.exe
PID 1488 wrote to memory of 1308	1488	kat5C39.tmp	cmd.exe
PID 1488 wrote to memory of 1308	1488	kat5C39.tmp	cmd.exe
PID 1308 wrote to memory of 3236	1308	cmd.exe	timeout.exe
PID 1308 wrote to memory of 3236	1308	cmd.exe	timeout.exe
PID 1308 wrote to memory of 3236	1308	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\b53144e47aeb73e100c7f0d74d5c9739cc3ecf07c2ff915f3571aad94822293e.exe
"C:\Users\Admin\AppData\Local\Temp\b53144e47aeb73e100c7f0d74d5c9739cc3ecf07c2ff915f3571aad94822293e.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1296

C:\Users\Admin\AppData\Local\Temp\kat5C39.tmp
C:\Users\Admin\AppData\Local\Temp\kat5C39.tmp
2⤵
- Checks computer location settings
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1488

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\system32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat5C39.tmp" & rd /s /q "C:\ProgramData\GDGDHJJDGHCA" & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:1308

C:\Windows\SysWOW64\timeout.exe
timeout /t 10
4⤵
- Delays execution with timeout.exe
PID:3236

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\kat5C39.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1296-0-0x00000000023E0000-0x00000000023E1000-memory.dmp

Filesize
4KB

Download
memory/1296-9-0x0000000000400000-0x0000000000641000-memory.dmp

Filesize
2.3MB

Download
memory/1296-2-0x0000000004180000-0x0000000004293000-memory.dmp

Filesize
1.1MB

Download
memory/1488-10-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1488-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1488-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1488-11-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1488-12-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1488-14-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1488-13-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1488-15-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download