stealc | 174b8133b4ceb5e97d9f180c111cd9f17bd95e16d9ec1bf303a2318a5cda3821

General

Target

174b8133b4ceb5e97d9f180c111cd9f17bd95e16d9ec1bf303a2318a5cda3821.exe
Size

2.4MB
MD5

42763462311975fc99615499b8345b4c
SHA1

fabee27f89a1535ebb217618468078ca5f772814
SHA256

174b8133b4ceb5e97d9f180c111cd9f17bd95e16d9ec1bf303a2318a5cda3821
SHA512

8d054038c5538b9aef46cea5c94e85c839601ed01dca9e925bd633cbf22cca3522343454578b9256ebf15ce18f92af1653410f557d6f37be651bc920011b8db4
SSDEEP

49152:jxIRJF1HL+VdX68kUyJtTF+TxMoxc1TU+j+dAzGwlrh:jEJF16dX68dytIuoITsdZ

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://steamcommunity.com/profiles/76561199689717899

https://t.me/copterwin

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Signatures

Detect Vidar Stealer 9 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/2332-2-0x0000000004270000-0x00000000043B9000-memory.dmp	family_vidar_v7
behavioral2/memory/4244-5-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4244-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4244-11-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4244-18-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4244-19-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4244-20-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4244-37-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4244-38-0x0000000000400000-0x0000000000646000-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:

kat1D66.tmp

pid process

4244 kat1D66.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

pid	process
4244	kat1D66.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

174b8133b4ceb5e97d9f180c111cd9f17bd95e16d9ec1bf303a2318a5cda3821.exe

description	pid	process	target process
PID 2332 set thread context of 4244	2332	174b8133b4ceb5e97d9f180c111cd9f17bd95e16d9ec1bf303a2318a5cda3821.exe	kat1D66.tmp

Checks processor information in registry 2 TTPs 1 IoCs
Processor information is often read in order to detect sandboxing environments.

Query Registry
T1012

System Information Discovery
T1082

Processes:

kat1D66.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat1D66.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat1D66.tmp

pid process

4244 kat1D66.tmp
4244 kat1D66.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat1D66.tmp

pid	process
4244	kat1D66.tmp
4244	kat1D66.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

174b8133b4ceb5e97d9f180c111cd9f17bd95e16d9ec1bf303a2318a5cda3821.exe

description	pid	process	target process
PID 2332 wrote to memory of 4244	2332	174b8133b4ceb5e97d9f180c111cd9f17bd95e16d9ec1bf303a2318a5cda3821.exe	kat1D66.tmp
PID 2332 wrote to memory of 4244	2332	174b8133b4ceb5e97d9f180c111cd9f17bd95e16d9ec1bf303a2318a5cda3821.exe	kat1D66.tmp
PID 2332 wrote to memory of 4244	2332	174b8133b4ceb5e97d9f180c111cd9f17bd95e16d9ec1bf303a2318a5cda3821.exe	kat1D66.tmp
PID 2332 wrote to memory of 4244	2332	174b8133b4ceb5e97d9f180c111cd9f17bd95e16d9ec1bf303a2318a5cda3821.exe	kat1D66.tmp
PID 2332 wrote to memory of 4244	2332	174b8133b4ceb5e97d9f180c111cd9f17bd95e16d9ec1bf303a2318a5cda3821.exe	kat1D66.tmp
PID 2332 wrote to memory of 4244	2332	174b8133b4ceb5e97d9f180c111cd9f17bd95e16d9ec1bf303a2318a5cda3821.exe	kat1D66.tmp
PID 2332 wrote to memory of 4244	2332	174b8133b4ceb5e97d9f180c111cd9f17bd95e16d9ec1bf303a2318a5cda3821.exe	kat1D66.tmp
PID 2332 wrote to memory of 4244	2332	174b8133b4ceb5e97d9f180c111cd9f17bd95e16d9ec1bf303a2318a5cda3821.exe	kat1D66.tmp

C:\Users\Admin\AppData\Local\Temp\174b8133b4ceb5e97d9f180c111cd9f17bd95e16d9ec1bf303a2318a5cda3821.exe
"C:\Users\Admin\AppData\Local\Temp\174b8133b4ceb5e97d9f180c111cd9f17bd95e16d9ec1bf303a2318a5cda3821.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2332

C:\Users\Admin\AppData\Local\Temp\kat1D66.tmp
C:\Users\Admin\AppData\Local\Temp\kat1D66.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:4244

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=2232 --field-trial-handle=3060,i,1774866140584649235,8085848018931772189,262144 --variations-seed-version /prefetch:8
1⤵
PID:3388

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat1D66.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2332-10-0x0000000000400000-0x0000000000678000-memory.dmp

Filesize
2.5MB

Download
memory/2332-1-0x0000000000400000-0x0000000000678000-memory.dmp

Filesize
2.5MB

Download
memory/2332-2-0x0000000004270000-0x00000000043B9000-memory.dmp

Filesize
1.3MB

Download
memory/2332-0-0x0000000002410000-0x0000000002411000-memory.dmp

Filesize
4KB

Download
memory/4244-5-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4244-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4244-11-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4244-18-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4244-19-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4244-20-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4244-22-0x000000001B780000-0x000000001B9DF000-memory.dmp

Filesize
2.4MB

Download
memory/4244-37-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4244-38-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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