stealc | bd20743a10b1e5b6ee464f091ba7a12386bc4982d20d58a4d3de6edd1f3f1f03

Analysis

max time kernel
90s
max time network
127s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
30-06-2024 13:09

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General

Target

bd20743a10b1e5b6ee464f091ba7a12386bc4982d20d58a4d3de6edd1f3f1f03.exe
Size

2.2MB
MD5

da8ac3b74217a2459b95ae8d39cbd31e
SHA1

6cb162cfcc31d5ab7d37933ed7232c6ae1528445
SHA256

bd20743a10b1e5b6ee464f091ba7a12386bc4982d20d58a4d3de6edd1f3f1f03
SHA512

26392b4b45795254a4cf0a18dd2486ccdb515d4a476f5282e3651525d31c0f69f98c13f94320cd58b103ebd409d0a786fc6ed5a60f217cde0df9a2b6dccb1050
SSDEEP

24576:Uc0PyhhGkCI1wUL24jtYkYGbawg757CgXueAgXreU2MZQti1u8LnsDJY6WpEYGYG:UJ0hsA91MPJ21tuuIeNHYGY0LzjsJxK

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
behavioral2/memory/972-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/972-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/972-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/436-1-0x0000000004050000-0x0000000004163000-memory.dmp	family_vidar_v7
behavioral2/memory/972-24-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/972-25-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/972-42-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/972-43-0x0000000000400000-0x0000000000648000-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:

kat7407.tmp

pid process

972 kat7407.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:

bd20743a10b1e5b6ee464f091ba7a12386bc4982d20d58a4d3de6edd1f3f1f03.exe

description pid process target process

PID 436 set thread context of 972 436 bd20743a10b1e5b6ee464f091ba7a12386bc4982d20d58a4d3de6edd1f3f1f03.exe kat7407.tmp

pid	process
972	kat7407.tmp

description	pid	process	target process
PID 436 set thread context of 972	436	bd20743a10b1e5b6ee464f091ba7a12386bc4982d20d58a4d3de6edd1f3f1f03.exe	kat7407.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:

kat7407.tmp

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	kat7407.tmp
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat7407.tmp

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

kat7407.tmp

pid process

972 kat7407.tmp
972 kat7407.tmp
972 kat7407.tmp
972 kat7407.tmp

pid	process
972	kat7407.tmp
972	kat7407.tmp
972	kat7407.tmp
972	kat7407.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

bd20743a10b1e5b6ee464f091ba7a12386bc4982d20d58a4d3de6edd1f3f1f03.exe

description	pid	process	target process
PID 436 wrote to memory of 972	436	bd20743a10b1e5b6ee464f091ba7a12386bc4982d20d58a4d3de6edd1f3f1f03.exe	kat7407.tmp
PID 436 wrote to memory of 972	436	bd20743a10b1e5b6ee464f091ba7a12386bc4982d20d58a4d3de6edd1f3f1f03.exe	kat7407.tmp
PID 436 wrote to memory of 972	436	bd20743a10b1e5b6ee464f091ba7a12386bc4982d20d58a4d3de6edd1f3f1f03.exe	kat7407.tmp
PID 436 wrote to memory of 972	436	bd20743a10b1e5b6ee464f091ba7a12386bc4982d20d58a4d3de6edd1f3f1f03.exe	kat7407.tmp
PID 436 wrote to memory of 972	436	bd20743a10b1e5b6ee464f091ba7a12386bc4982d20d58a4d3de6edd1f3f1f03.exe	kat7407.tmp
PID 436 wrote to memory of 972	436	bd20743a10b1e5b6ee464f091ba7a12386bc4982d20d58a4d3de6edd1f3f1f03.exe	kat7407.tmp
PID 436 wrote to memory of 972	436	bd20743a10b1e5b6ee464f091ba7a12386bc4982d20d58a4d3de6edd1f3f1f03.exe	kat7407.tmp
PID 436 wrote to memory of 972	436	bd20743a10b1e5b6ee464f091ba7a12386bc4982d20d58a4d3de6edd1f3f1f03.exe	kat7407.tmp

C:\Users\Admin\AppData\Local\Temp\bd20743a10b1e5b6ee464f091ba7a12386bc4982d20d58a4d3de6edd1f3f1f03.exe
"C:\Users\Admin\AppData\Local\Temp\bd20743a10b1e5b6ee464f091ba7a12386bc4982d20d58a4d3de6edd1f3f1f03.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:436

C:\Users\Admin\AppData\Local\Temp\kat7407.tmp
C:\Users\Admin\AppData\Local\Temp\kat7407.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:972

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\kat7407.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/436-0-0x00000000023A0000-0x00000000023A1000-memory.dmp

Filesize
4KB

Download
memory/436-9-0x0000000000400000-0x0000000000641000-memory.dmp

Filesize
2.3MB

Download
memory/436-1-0x0000000004050000-0x0000000004163000-memory.dmp

Filesize
1.1MB

Download
memory/972-10-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/972-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/972-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/972-24-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/972-25-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/972-27-0x00000000227A0000-0x00000000229FF000-memory.dmp

Filesize
2.4MB

Download
memory/972-42-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/972-43-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download