stealc | 650c5cb276ef56d8b2cc4e0b554b3d2e736f7f53c6fbb74f3a350f81ae4a2fed

General

Target

650c5cb276ef56d8b2cc4e0b554b3d2e736f7f53c6fbb74f3a350f81ae4a2fed.exe
Size

2.1MB
MD5

13a9d43c03ee9243a34d03bb2aee29f7
SHA1

deec99296da0c5fa52406b53f8fc26c99483b5ed
SHA256

650c5cb276ef56d8b2cc4e0b554b3d2e736f7f53c6fbb74f3a350f81ae4a2fed
SHA512

d916d6ff1c619ae6558861f376fc98d6fa13e0208d2598939970891de02b386cbd7ec6f84e50d90b56ee19d35086219f0288cd41bcdbf905b017104560814334
SSDEEP

49152:N6uDuaS9refCIJtTF+TxMoxc1TU+j+dAzGwlrh:N6uKb9HItIuoITsdZ

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 8 IoCs

stealer

resource	yara_rule
behavioral1/memory/1440-2-0x0000000004020000-0x0000000004169000-memory.dmp	family_vidar_v7
behavioral1/memory/4552-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4552-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4552-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4552-14-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4552-15-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4552-32-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4552-33-0x0000000000400000-0x0000000000646000-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

pid	Process
4552	kat54A8.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

description	pid	Process	procid_target
PID 1440 set thread context of 4552	1440	650c5cb276ef56d8b2cc4e0b554b3d2e736f7f53c6fbb74f3a350f81ae4a2fed.exe	82

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

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat54A8.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4552	kat54A8.tmp
4552	kat54A8.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1440 wrote to memory of 4552	1440	650c5cb276ef56d8b2cc4e0b554b3d2e736f7f53c6fbb74f3a350f81ae4a2fed.exe	82
PID 1440 wrote to memory of 4552	1440	650c5cb276ef56d8b2cc4e0b554b3d2e736f7f53c6fbb74f3a350f81ae4a2fed.exe	82
PID 1440 wrote to memory of 4552	1440	650c5cb276ef56d8b2cc4e0b554b3d2e736f7f53c6fbb74f3a350f81ae4a2fed.exe	82
PID 1440 wrote to memory of 4552	1440	650c5cb276ef56d8b2cc4e0b554b3d2e736f7f53c6fbb74f3a350f81ae4a2fed.exe	82
PID 1440 wrote to memory of 4552	1440	650c5cb276ef56d8b2cc4e0b554b3d2e736f7f53c6fbb74f3a350f81ae4a2fed.exe	82
PID 1440 wrote to memory of 4552	1440	650c5cb276ef56d8b2cc4e0b554b3d2e736f7f53c6fbb74f3a350f81ae4a2fed.exe	82
PID 1440 wrote to memory of 4552	1440	650c5cb276ef56d8b2cc4e0b554b3d2e736f7f53c6fbb74f3a350f81ae4a2fed.exe	82
PID 1440 wrote to memory of 4552	1440	650c5cb276ef56d8b2cc4e0b554b3d2e736f7f53c6fbb74f3a350f81ae4a2fed.exe	82

C:\Users\Admin\AppData\Local\Temp\650c5cb276ef56d8b2cc4e0b554b3d2e736f7f53c6fbb74f3a350f81ae4a2fed.exe
"C:\Users\Admin\AppData\Local\Temp\650c5cb276ef56d8b2cc4e0b554b3d2e736f7f53c6fbb74f3a350f81ae4a2fed.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1440
- C:\Users\Admin\AppData\Local\Temp\kat54A8.tmp
  C:\Users\Admin\AppData\Local\Temp\kat54A8.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:4552

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat54A8.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1440-0-0x0000000002390000-0x0000000002391000-memory.dmp

Filesize
4KB

Download
memory/1440-2-0x0000000004020000-0x0000000004169000-memory.dmp

Filesize
1.3MB

Download
memory/1440-10-0x0000000000400000-0x000000000061C000-memory.dmp

Filesize
2.1MB

Download
memory/4552-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4552-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4552-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4552-14-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4552-15-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4552-17-0x000000001DC30000-0x000000001DE8F000-memory.dmp

Filesize
2.4MB

Download
memory/4552-32-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4552-33-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

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