stealc | 188586fc32c6ce1fa2875913d6f4b38a33e1af87fa55c2fee05b8ca5698ba9af

General

Target

188586fc32c6ce1fa2875913d6f4b38a33e1af87fa55c2fee05b8ca5698ba9af.exe
Size

2.0MB
MD5

e003c7253e44890a674e49005772e747
SHA1

0680969531cac5e6bde0602b2bd5cc44239ed143
SHA256

188586fc32c6ce1fa2875913d6f4b38a33e1af87fa55c2fee05b8ca5698ba9af
SHA512

d1e817db802faa8ea12d22fd15d8f86c21ecbb64d15f85d089f077bb4db5445600598f1092bbc0235775cfbd52757e29ec55bc8f678dcb7ac4f492ab5ef928c2
SSDEEP

49152:7QzHt472D/JtTF+TxMoxc1TU+j+dAzGwlrh:7QzHtBtIuoITsdZ

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 9 IoCs

stealer

resource	yara_rule
behavioral2/memory/2432-1-0x0000000004020000-0x0000000004169000-memory.dmp	family_vidar_v7
behavioral2/memory/4432-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4432-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4432-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4432-16-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4432-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4432-34-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4432-50-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4432-57-0x0000000000400000-0x0000000000646000-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
4432	kat8491.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 2432 set thread context of 4432	2432	188586fc32c6ce1fa2875913d6f4b38a33e1af87fa55c2fee05b8ca5698ba9af.exe	77

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	kat8491.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4432	kat8491.tmp
4432	kat8491.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2432 wrote to memory of 4432	2432	188586fc32c6ce1fa2875913d6f4b38a33e1af87fa55c2fee05b8ca5698ba9af.exe	77
PID 2432 wrote to memory of 4432	2432	188586fc32c6ce1fa2875913d6f4b38a33e1af87fa55c2fee05b8ca5698ba9af.exe	77
PID 2432 wrote to memory of 4432	2432	188586fc32c6ce1fa2875913d6f4b38a33e1af87fa55c2fee05b8ca5698ba9af.exe	77
PID 2432 wrote to memory of 4432	2432	188586fc32c6ce1fa2875913d6f4b38a33e1af87fa55c2fee05b8ca5698ba9af.exe	77
PID 2432 wrote to memory of 4432	2432	188586fc32c6ce1fa2875913d6f4b38a33e1af87fa55c2fee05b8ca5698ba9af.exe	77
PID 2432 wrote to memory of 4432	2432	188586fc32c6ce1fa2875913d6f4b38a33e1af87fa55c2fee05b8ca5698ba9af.exe	77
PID 2432 wrote to memory of 4432	2432	188586fc32c6ce1fa2875913d6f4b38a33e1af87fa55c2fee05b8ca5698ba9af.exe	77
PID 2432 wrote to memory of 4432	2432	188586fc32c6ce1fa2875913d6f4b38a33e1af87fa55c2fee05b8ca5698ba9af.exe	77

C:\Users\Admin\AppData\Local\Temp\188586fc32c6ce1fa2875913d6f4b38a33e1af87fa55c2fee05b8ca5698ba9af.exe
"C:\Users\Admin\AppData\Local\Temp\188586fc32c6ce1fa2875913d6f4b38a33e1af87fa55c2fee05b8ca5698ba9af.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2432
- C:\Users\Admin\AppData\Local\Temp\kat8491.tmp
  C:\Users\Admin\AppData\Local\Temp\kat8491.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:4432

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\kat8491.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2432-9-0x0000000000400000-0x0000000000601000-memory.dmp

Filesize
2.0MB

Download
memory/2432-1-0x0000000004020000-0x0000000004169000-memory.dmp

Filesize
1.3MB

Download
memory/2432-0-0x0000000000750000-0x0000000000751000-memory.dmp

Filesize
4KB

Download
memory/4432-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4432-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4432-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4432-16-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4432-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4432-19-0x000000001B8A0000-0x000000001BAFF000-memory.dmp

Filesize
2.4MB

Download
memory/4432-34-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4432-50-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4432-57-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

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