stealc | 37c0f05ee6421cb398999a569599c1b25880c8c58fb89c1256f9a93091337d59

General

Target

37c0f05ee6421cb398999a569599c1b25880c8c58fb89c1256f9a93091337d59.exe
Size

2.1MB
MD5

7c6870f427c6c04597e8ab697826f01e
SHA1

77ac2d4e0ba3ef02967ea36c8d688535b101bccd
SHA256

37c0f05ee6421cb398999a569599c1b25880c8c58fb89c1256f9a93091337d59
SHA512

10ee334480fb6084c46026e0c18bca9acb06b3c91015f235357c51aa37eb6371a480adeb2ae765d058708e2470a6e4523d557c4c6899db9b4db8602c2c9b112b
SSDEEP

49152:N6uDuaS9refGcJtTF+TxMoxc1TU+j+dAzGwlrh:N6uKb9DctIuoITsdZ

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/2168-1-0x0000000004000000-0x0000000004149000-memory.dmp	family_vidar_v7
behavioral1/memory/3388-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3388-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3388-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3388-19-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3388-20-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3388-37-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3388-38-0x0000000000400000-0x0000000000646000-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

pid	Process
3388	kat7AAE.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 2168 set thread context of 3388	2168	37c0f05ee6421cb398999a569599c1b25880c8c58fb89c1256f9a93091337d59.exe	87

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	kat7AAE.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3388	kat7AAE.tmp
3388	kat7AAE.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2168 wrote to memory of 3388	2168	37c0f05ee6421cb398999a569599c1b25880c8c58fb89c1256f9a93091337d59.exe	87
PID 2168 wrote to memory of 3388	2168	37c0f05ee6421cb398999a569599c1b25880c8c58fb89c1256f9a93091337d59.exe	87
PID 2168 wrote to memory of 3388	2168	37c0f05ee6421cb398999a569599c1b25880c8c58fb89c1256f9a93091337d59.exe	87
PID 2168 wrote to memory of 3388	2168	37c0f05ee6421cb398999a569599c1b25880c8c58fb89c1256f9a93091337d59.exe	87
PID 2168 wrote to memory of 3388	2168	37c0f05ee6421cb398999a569599c1b25880c8c58fb89c1256f9a93091337d59.exe	87
PID 2168 wrote to memory of 3388	2168	37c0f05ee6421cb398999a569599c1b25880c8c58fb89c1256f9a93091337d59.exe	87
PID 2168 wrote to memory of 3388	2168	37c0f05ee6421cb398999a569599c1b25880c8c58fb89c1256f9a93091337d59.exe	87
PID 2168 wrote to memory of 3388	2168	37c0f05ee6421cb398999a569599c1b25880c8c58fb89c1256f9a93091337d59.exe	87

C:\Users\Admin\AppData\Local\Temp\37c0f05ee6421cb398999a569599c1b25880c8c58fb89c1256f9a93091337d59.exe
"C:\Users\Admin\AppData\Local\Temp\37c0f05ee6421cb398999a569599c1b25880c8c58fb89c1256f9a93091337d59.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2168
- C:\Users\Admin\AppData\Local\Temp\kat7AAE.tmp
  C:\Users\Admin\AppData\Local\Temp\kat7AAE.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat7AAE.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2168-0-0x0000000002260000-0x0000000002261000-memory.dmp

Filesize
4KB

Download
memory/2168-1-0x0000000004000000-0x0000000004149000-memory.dmp

Filesize
1.3MB

Download
memory/2168-10-0x0000000000400000-0x000000000061C000-memory.dmp

Filesize
2.1MB

Download
memory/3388-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3388-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3388-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3388-19-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3388-20-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3388-22-0x0000000028480000-0x00000000286DF000-memory.dmp

Filesize
2.4MB

Download
memory/3388-37-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3388-38-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

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