stealc | 5b059307b89a21578aaee753740529e36dc3cbb175a1023480b3d727a7168269

General

Target

5b059307b89a21578aaee753740529e36dc3cbb175a1023480b3d727a7168269.exe
Size

2.1MB
MD5

5d051404a364e24ecbaf02fddc51f234
SHA1

0541737e338a50d1f36fe1c8d476d5c7aea726b0
SHA256

5b059307b89a21578aaee753740529e36dc3cbb175a1023480b3d727a7168269
SHA512

3fbd3c30dc97ce8e34df7ab7bb1e88463a27d7ba089e3a9fae9402f76e51c60d64e6c51d7636c277de3487f510c8f04cef4a1fb5b75aade8f132a9d1b0317d50
SSDEEP

49152:N6uDuaS9refuoJtTF+TxMoxc1TU+j+dAzGwlrh:N6uKb97otIuoITsdZ

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
behavioral2/memory/1744-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/1744-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/1744-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/1444-3-0x0000000004040000-0x0000000004189000-memory.dmp	family_vidar_v7
behavioral2/memory/1744-16-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/1744-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/1744-34-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/1744-35-0x0000000000400000-0x0000000000646000-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

pid	Process
1744	kat47E6.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 1444 set thread context of 1744	1444	5b059307b89a21578aaee753740529e36dc3cbb175a1023480b3d727a7168269.exe	80

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	kat47E6.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1744	kat47E6.tmp
1744	kat47E6.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1444 wrote to memory of 1744	1444	5b059307b89a21578aaee753740529e36dc3cbb175a1023480b3d727a7168269.exe	80
PID 1444 wrote to memory of 1744	1444	5b059307b89a21578aaee753740529e36dc3cbb175a1023480b3d727a7168269.exe	80
PID 1444 wrote to memory of 1744	1444	5b059307b89a21578aaee753740529e36dc3cbb175a1023480b3d727a7168269.exe	80
PID 1444 wrote to memory of 1744	1444	5b059307b89a21578aaee753740529e36dc3cbb175a1023480b3d727a7168269.exe	80
PID 1444 wrote to memory of 1744	1444	5b059307b89a21578aaee753740529e36dc3cbb175a1023480b3d727a7168269.exe	80
PID 1444 wrote to memory of 1744	1444	5b059307b89a21578aaee753740529e36dc3cbb175a1023480b3d727a7168269.exe	80
PID 1444 wrote to memory of 1744	1444	5b059307b89a21578aaee753740529e36dc3cbb175a1023480b3d727a7168269.exe	80
PID 1444 wrote to memory of 1744	1444	5b059307b89a21578aaee753740529e36dc3cbb175a1023480b3d727a7168269.exe	80

C:\Users\Admin\AppData\Local\Temp\5b059307b89a21578aaee753740529e36dc3cbb175a1023480b3d727a7168269.exe
"C:\Users\Admin\AppData\Local\Temp\5b059307b89a21578aaee753740529e36dc3cbb175a1023480b3d727a7168269.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1444
- C:\Users\Admin\AppData\Local\Temp\kat47E6.tmp
  C:\Users\Admin\AppData\Local\Temp\kat47E6.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:1744

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\kat47E6.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1444-0-0x0000000002580000-0x0000000002581000-memory.dmp

Filesize
4KB

Download
memory/1444-10-0x0000000000400000-0x000000000061C000-memory.dmp

Filesize
2.1MB

Download
memory/1444-3-0x0000000004040000-0x0000000004189000-memory.dmp

Filesize
1.3MB

Download
memory/1744-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1744-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1744-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1744-16-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1744-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1744-19-0x00000000193C0000-0x000000001961F000-memory.dmp

Filesize
2.4MB

Download
memory/1744-34-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1744-35-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

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