stealc | aa0f001f90f8668245ee8d9a0a3e8e69fa48ca0c612af20c971fce8d7a44a9e0

Analysis

max time kernel
92s
max time network
126s
platform
windows11-21h2_x64
resource
win11-20240611-en
resource tags

arch:x64arch:x86image:win11-20240611-enlocale:en-usos:windows11-21h2-x64system
submitted
01-07-2024 07:53

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General

Target

aa0f001f90f8668245ee8d9a0a3e8e69fa48ca0c612af20c971fce8d7a44a9e0.exe
Size

2.2MB
MD5

6f83172264c5e0e2fb53de552c278bb5
SHA1

b5674eef8b8ed3e23a5122b9353087dc50958145
SHA256

aa0f001f90f8668245ee8d9a0a3e8e69fa48ca0c612af20c971fce8d7a44a9e0
SHA512

92259a62d73ac6283820a9bdb0ee4d47e3bb2f2c387a977e24dc2f617c8e50dc095623b970029808397e97f33f56159b7617a9bdb34871caf28c27da6fb226d6
SSDEEP

24576:Uc0PyhhGkCI1wUL24jtYkYGbawg757CgXueAgXnNU2MZQti1u8LnsDJY6WpEYGYG:UJ0hsA91MPS21tuuIeNHYGY0LzjsJxK

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/1372-1-0x0000000004170000-0x0000000004283000-memory.dmp	family_vidar_v7
behavioral2/memory/3980-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3980-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3980-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3980-24-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3980-25-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3980-35-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3980-36-0x0000000000400000-0x0000000000648000-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:

kat7119.tmp

pid process

3980 kat7119.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:

aa0f001f90f8668245ee8d9a0a3e8e69fa48ca0c612af20c971fce8d7a44a9e0.exe

description pid process target process

PID 1372 set thread context of 3980 1372 aa0f001f90f8668245ee8d9a0a3e8e69fa48ca0c612af20c971fce8d7a44a9e0.exe kat7119.tmp

pid	process
3980	kat7119.tmp

description	pid	process	target process
PID 1372 set thread context of 3980	1372	aa0f001f90f8668245ee8d9a0a3e8e69fa48ca0c612af20c971fce8d7a44a9e0.exe	kat7119.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:

kat7119.tmp

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	kat7119.tmp
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat7119.tmp

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

kat7119.tmp

pid process

3980 kat7119.tmp
3980 kat7119.tmp
3980 kat7119.tmp
3980 kat7119.tmp

pid	process
3980	kat7119.tmp
3980	kat7119.tmp
3980	kat7119.tmp
3980	kat7119.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

aa0f001f90f8668245ee8d9a0a3e8e69fa48ca0c612af20c971fce8d7a44a9e0.exe

description	pid	process	target process
PID 1372 wrote to memory of 3980	1372	aa0f001f90f8668245ee8d9a0a3e8e69fa48ca0c612af20c971fce8d7a44a9e0.exe	kat7119.tmp
PID 1372 wrote to memory of 3980	1372	aa0f001f90f8668245ee8d9a0a3e8e69fa48ca0c612af20c971fce8d7a44a9e0.exe	kat7119.tmp
PID 1372 wrote to memory of 3980	1372	aa0f001f90f8668245ee8d9a0a3e8e69fa48ca0c612af20c971fce8d7a44a9e0.exe	kat7119.tmp
PID 1372 wrote to memory of 3980	1372	aa0f001f90f8668245ee8d9a0a3e8e69fa48ca0c612af20c971fce8d7a44a9e0.exe	kat7119.tmp
PID 1372 wrote to memory of 3980	1372	aa0f001f90f8668245ee8d9a0a3e8e69fa48ca0c612af20c971fce8d7a44a9e0.exe	kat7119.tmp
PID 1372 wrote to memory of 3980	1372	aa0f001f90f8668245ee8d9a0a3e8e69fa48ca0c612af20c971fce8d7a44a9e0.exe	kat7119.tmp
PID 1372 wrote to memory of 3980	1372	aa0f001f90f8668245ee8d9a0a3e8e69fa48ca0c612af20c971fce8d7a44a9e0.exe	kat7119.tmp
PID 1372 wrote to memory of 3980	1372	aa0f001f90f8668245ee8d9a0a3e8e69fa48ca0c612af20c971fce8d7a44a9e0.exe	kat7119.tmp

C:\Users\Admin\AppData\Local\Temp\aa0f001f90f8668245ee8d9a0a3e8e69fa48ca0c612af20c971fce8d7a44a9e0.exe
"C:\Users\Admin\AppData\Local\Temp\aa0f001f90f8668245ee8d9a0a3e8e69fa48ca0c612af20c971fce8d7a44a9e0.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1372

C:\Users\Admin\AppData\Local\Temp\kat7119.tmp
C:\Users\Admin\AppData\Local\Temp\kat7119.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:3980

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\kat7119.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1372-0-0x00000000024E0000-0x00000000024E1000-memory.dmp

Filesize
4KB

Download
memory/1372-1-0x0000000004170000-0x0000000004283000-memory.dmp

Filesize
1.1MB

Download
memory/1372-10-0x0000000000400000-0x0000000000641000-memory.dmp

Filesize
2.3MB

Download
memory/3980-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3980-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3980-9-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3980-24-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3980-25-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3980-27-0x0000000022760000-0x00000000229BF000-memory.dmp

Filesize
2.4MB

Download
memory/3980-35-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3980-36-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download