stealc | 551a86f421ebe34a3c4f775b828f22cb9564a4ca2d95f2e4c602118e8f148a92

General

Target

551a86f421ebe34a3c4f775b828f22cb9564a4ca2d95f2e4c602118e8f148a92.exe
Size

2.0MB
MD5

b2f48295fab86eb2d5e82f41298f60a6
SHA1

623cf72cf5383a1e93afbe664255cdfed8cacc6a
SHA256

551a86f421ebe34a3c4f775b828f22cb9564a4ca2d95f2e4c602118e8f148a92
SHA512

fc03273d78085671218df0b09ccece22f9f0046fa0f73738234ae49f0cc695ba271fc6ded0b350e2563e03d523d752330c35bafd2a62da6b163bae63f3da7a08
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 8 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/4880-3-0x0000000004070000-0x00000000041B9000-memory.dmp	family_vidar_v7
behavioral2/memory/4808-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4808-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4808-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4808-14-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4808-15-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4808-32-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4808-33-0x0000000000400000-0x0000000000646000-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:

kat7688.tmp

pid process

4808 kat7688.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
4808	kat7688.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

551a86f421ebe34a3c4f775b828f22cb9564a4ca2d95f2e4c602118e8f148a92.exe

description	pid	process	target process
PID 4880 set thread context of 4808	4880	551a86f421ebe34a3c4f775b828f22cb9564a4ca2d95f2e4c602118e8f148a92.exe	kat7688.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:

kat7688.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat7688.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat7688.tmp

pid process

4808 kat7688.tmp
4808 kat7688.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat7688.tmp

pid	process
4808	kat7688.tmp
4808	kat7688.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

551a86f421ebe34a3c4f775b828f22cb9564a4ca2d95f2e4c602118e8f148a92.exe

description	pid	process	target process
PID 4880 wrote to memory of 4808	4880	551a86f421ebe34a3c4f775b828f22cb9564a4ca2d95f2e4c602118e8f148a92.exe	kat7688.tmp
PID 4880 wrote to memory of 4808	4880	551a86f421ebe34a3c4f775b828f22cb9564a4ca2d95f2e4c602118e8f148a92.exe	kat7688.tmp
PID 4880 wrote to memory of 4808	4880	551a86f421ebe34a3c4f775b828f22cb9564a4ca2d95f2e4c602118e8f148a92.exe	kat7688.tmp
PID 4880 wrote to memory of 4808	4880	551a86f421ebe34a3c4f775b828f22cb9564a4ca2d95f2e4c602118e8f148a92.exe	kat7688.tmp
PID 4880 wrote to memory of 4808	4880	551a86f421ebe34a3c4f775b828f22cb9564a4ca2d95f2e4c602118e8f148a92.exe	kat7688.tmp
PID 4880 wrote to memory of 4808	4880	551a86f421ebe34a3c4f775b828f22cb9564a4ca2d95f2e4c602118e8f148a92.exe	kat7688.tmp
PID 4880 wrote to memory of 4808	4880	551a86f421ebe34a3c4f775b828f22cb9564a4ca2d95f2e4c602118e8f148a92.exe	kat7688.tmp
PID 4880 wrote to memory of 4808	4880	551a86f421ebe34a3c4f775b828f22cb9564a4ca2d95f2e4c602118e8f148a92.exe	kat7688.tmp

C:\Users\Admin\AppData\Local\Temp\551a86f421ebe34a3c4f775b828f22cb9564a4ca2d95f2e4c602118e8f148a92.exe
"C:\Users\Admin\AppData\Local\Temp\551a86f421ebe34a3c4f775b828f22cb9564a4ca2d95f2e4c602118e8f148a92.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4880
- C:\Users\Admin\AppData\Local\Temp\kat7688.tmp
  C:\Users\Admin\AppData\Local\Temp\kat7688.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:4808

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\kat7688.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/4808-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4808-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4808-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4808-14-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4808-15-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4808-17-0x000000001B7F0000-0x000000001BA4F000-memory.dmp

Filesize
2.4MB

Download
memory/4808-32-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4808-33-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4880-0-0x0000000002380000-0x0000000002381000-memory.dmp

Filesize
4KB

Download
memory/4880-3-0x0000000004070000-0x00000000041B9000-memory.dmp

Filesize
1.3MB

Download
memory/4880-10-0x0000000000400000-0x0000000000612000-memory.dmp

Filesize
2.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads