stealc | 865f23d1e76abde3903d2c954598aa5fe6d9ed09969877e1722bd6053a186c86

Analysis

max time kernel
93s
max time network
130s
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 19:59

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General

Target

865f23d1e76abde3903d2c954598aa5fe6d9ed09969877e1722bd6053a186c86.exe
Size

2.2MB
MD5

49eb890a7192a0a4b700710d8b88353b
SHA1

906a6fbad2ff7d94dfe5e4e79a16f194e2f04dfe
SHA256

865f23d1e76abde3903d2c954598aa5fe6d9ed09969877e1722bd6053a186c86
SHA512

7dd889bc34d3465a17336f4fb3b350a6a50b36b7a20a65a97eba8974ea1dab445219a7507044c1e7c64dc0bcf77ecc98e547f1ffc44e0d276f14ad91ae619f3f
SSDEEP

24576:Uc0PyhhGkCI1wUL24jtYkYGbawg757CgXueAgXf7U2MZQti1u8LnsDJY6WpEYGYG:UJ0hsA91MP421tuuIeNHYGY0LzjsJxK

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/436-1-0x0000000004040000-0x0000000004153000-memory.dmp	family_vidar_v7
behavioral2/memory/404-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/404-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/404-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/404-22-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/404-23-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/404-40-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/404-41-0x0000000000400000-0x0000000000648000-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:

kat44AA.tmp

pid process

404 kat44AA.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:

865f23d1e76abde3903d2c954598aa5fe6d9ed09969877e1722bd6053a186c86.exe

description pid process target process

PID 436 set thread context of 404 436 865f23d1e76abde3903d2c954598aa5fe6d9ed09969877e1722bd6053a186c86.exe kat44AA.tmp

pid	process
404	kat44AA.tmp

description	pid	process	target process
PID 436 set thread context of 404	436	865f23d1e76abde3903d2c954598aa5fe6d9ed09969877e1722bd6053a186c86.exe	kat44AA.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:

kat44AA.tmp

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	kat44AA.tmp
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat44AA.tmp

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

kat44AA.tmp

pid process

404 kat44AA.tmp
404 kat44AA.tmp
404 kat44AA.tmp
404 kat44AA.tmp

pid	process
404	kat44AA.tmp
404	kat44AA.tmp
404	kat44AA.tmp
404	kat44AA.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

865f23d1e76abde3903d2c954598aa5fe6d9ed09969877e1722bd6053a186c86.exe

description	pid	process	target process
PID 436 wrote to memory of 404	436	865f23d1e76abde3903d2c954598aa5fe6d9ed09969877e1722bd6053a186c86.exe	kat44AA.tmp
PID 436 wrote to memory of 404	436	865f23d1e76abde3903d2c954598aa5fe6d9ed09969877e1722bd6053a186c86.exe	kat44AA.tmp
PID 436 wrote to memory of 404	436	865f23d1e76abde3903d2c954598aa5fe6d9ed09969877e1722bd6053a186c86.exe	kat44AA.tmp
PID 436 wrote to memory of 404	436	865f23d1e76abde3903d2c954598aa5fe6d9ed09969877e1722bd6053a186c86.exe	kat44AA.tmp
PID 436 wrote to memory of 404	436	865f23d1e76abde3903d2c954598aa5fe6d9ed09969877e1722bd6053a186c86.exe	kat44AA.tmp
PID 436 wrote to memory of 404	436	865f23d1e76abde3903d2c954598aa5fe6d9ed09969877e1722bd6053a186c86.exe	kat44AA.tmp
PID 436 wrote to memory of 404	436	865f23d1e76abde3903d2c954598aa5fe6d9ed09969877e1722bd6053a186c86.exe	kat44AA.tmp
PID 436 wrote to memory of 404	436	865f23d1e76abde3903d2c954598aa5fe6d9ed09969877e1722bd6053a186c86.exe	kat44AA.tmp

C:\Users\Admin\AppData\Local\Temp\865f23d1e76abde3903d2c954598aa5fe6d9ed09969877e1722bd6053a186c86.exe
"C:\Users\Admin\AppData\Local\Temp\865f23d1e76abde3903d2c954598aa5fe6d9ed09969877e1722bd6053a186c86.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:436

C:\Users\Admin\AppData\Local\Temp\kat44AA.tmp
C:\Users\Admin\AppData\Local\Temp\kat44AA.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:404

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\kat44AA.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/404-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/404-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/404-9-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/404-22-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/404-23-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/404-25-0x0000000022810000-0x0000000022A6F000-memory.dmp

Filesize
2.4MB

Download
memory/404-40-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/404-41-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/436-0-0x0000000000910000-0x0000000000911000-memory.dmp

Filesize
4KB

Download
memory/436-1-0x0000000004040000-0x0000000004153000-memory.dmp

Filesize
1.1MB

Download
memory/436-10-0x0000000000400000-0x0000000000641000-memory.dmp

Filesize
2.3MB

Download