stealc | d586a21f282f1d5ab66ae23599c763f3a551cce4dbbeab5c7dbe9575b558c738

General

Target

d586a21f282f1d5ab66ae23599c763f3a551cce4dbbeab5c7dbe9575b558c738.exe
Size

2.0MB
MD5

34787964bb002a6c1749292f69e02a12
SHA1

b18ae36e0c262d13d98e4a2c91d6afc369d886c5
SHA256

d586a21f282f1d5ab66ae23599c763f3a551cce4dbbeab5c7dbe9575b558c738
SHA512

f966cc16fec7c87f8dbad75dd61e6d37ff1c70e5d898a374af9b2d661e9e65e2c182858e6128cb2370c4f6c632257fb3d2645566237c494a74c26cc540ea025a
SSDEEP

49152:OePpQE1JtTF+TxMoxc1TU+j+dAzGwlrh:OePpQE1tIuoITsdZ

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
behavioral1/memory/3892-2-0x00000000041B0000-0x00000000042F9000-memory.dmp	family_vidar_v7
behavioral1/memory/3372-5-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3372-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3372-11-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3372-13-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3372-16-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3372-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3372-34-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3372-35-0x0000000000400000-0x0000000000646000-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:

kat3EC9.tmp

pid process

3372 kat3EC9.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
3372	kat3EC9.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

d586a21f282f1d5ab66ae23599c763f3a551cce4dbbeab5c7dbe9575b558c738.exe

description	pid	process	target process
PID 3892 set thread context of 3372	3892	d586a21f282f1d5ab66ae23599c763f3a551cce4dbbeab5c7dbe9575b558c738.exe	kat3EC9.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:

kat3EC9.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat3EC9.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat3EC9.tmp

pid process

3372 kat3EC9.tmp
3372 kat3EC9.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat3EC9.tmp

pid	process
3372	kat3EC9.tmp
3372	kat3EC9.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

d586a21f282f1d5ab66ae23599c763f3a551cce4dbbeab5c7dbe9575b558c738.exe

description	pid	process	target process
PID 3892 wrote to memory of 3372	3892	d586a21f282f1d5ab66ae23599c763f3a551cce4dbbeab5c7dbe9575b558c738.exe	kat3EC9.tmp
PID 3892 wrote to memory of 3372	3892	d586a21f282f1d5ab66ae23599c763f3a551cce4dbbeab5c7dbe9575b558c738.exe	kat3EC9.tmp
PID 3892 wrote to memory of 3372	3892	d586a21f282f1d5ab66ae23599c763f3a551cce4dbbeab5c7dbe9575b558c738.exe	kat3EC9.tmp
PID 3892 wrote to memory of 3372	3892	d586a21f282f1d5ab66ae23599c763f3a551cce4dbbeab5c7dbe9575b558c738.exe	kat3EC9.tmp
PID 3892 wrote to memory of 3372	3892	d586a21f282f1d5ab66ae23599c763f3a551cce4dbbeab5c7dbe9575b558c738.exe	kat3EC9.tmp
PID 3892 wrote to memory of 3372	3892	d586a21f282f1d5ab66ae23599c763f3a551cce4dbbeab5c7dbe9575b558c738.exe	kat3EC9.tmp
PID 3892 wrote to memory of 3372	3892	d586a21f282f1d5ab66ae23599c763f3a551cce4dbbeab5c7dbe9575b558c738.exe	kat3EC9.tmp
PID 3892 wrote to memory of 3372	3892	d586a21f282f1d5ab66ae23599c763f3a551cce4dbbeab5c7dbe9575b558c738.exe	kat3EC9.tmp

C:\Users\Admin\AppData\Local\Temp\d586a21f282f1d5ab66ae23599c763f3a551cce4dbbeab5c7dbe9575b558c738.exe
"C:\Users\Admin\AppData\Local\Temp\d586a21f282f1d5ab66ae23599c763f3a551cce4dbbeab5c7dbe9575b558c738.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3892

C:\Users\Admin\AppData\Local\Temp\kat3EC9.tmp
C:\Users\Admin\AppData\Local\Temp\kat3EC9.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:3372

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=3612 --field-trial-handle=2284,i,9807419199535700662,2319175108930815708,262144 --variations-seed-version /prefetch:8
1⤵
PID:1716

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat3EC9.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/3372-16-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3372-5-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3372-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3372-11-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3372-13-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3372-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3372-19-0x000000001B7E0000-0x000000001BA3F000-memory.dmp

Filesize
2.4MB

Download
memory/3372-34-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3372-35-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3892-2-0x00000000041B0000-0x00000000042F9000-memory.dmp

Filesize
1.3MB

Download
memory/3892-1-0x00000000023C0000-0x00000000023C1000-memory.dmp

Filesize
4KB

Download
memory/3892-10-0x0000000000400000-0x0000000000612000-memory.dmp

Filesize
2.1MB

Download
memory/3892-0-0x0000000000400000-0x0000000000612000-memory.dmp

Filesize
2.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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