stealc | 86bc655cc2d621be255c11459364357fcc424636630586bcea1c1c4b6f220460

General

Target

86bc655cc2d621be255c11459364357fcc424636630586bcea1c1c4b6f220460.exe
Size

2.2MB
MD5

f08629e9849d938508a1699632367466
SHA1

b139861ec9224db808f631f9fdd7639348d6c44b
SHA256

86bc655cc2d621be255c11459364357fcc424636630586bcea1c1c4b6f220460
SHA512

33dad770865fcc35cc0eebcc90d723e6febdf955583a5d6f44b674d22b6932a35ac490752594cd62256ee9f06f260d3f9986dfa5137e2504d3921c0cd020fe36
SSDEEP

49152:qpjNvr9ySAOmw4hHHO+SASagXkJr4MDkUwm:qpjNp7p4hHH8n5A

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

vidar

C2

https://t.me/g067n

https://steamcommunity.com/profiles/76561199707802586

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:129.0) Gecko/20100101 Firefox/129.0

Signatures

Detect Vidar Stealer 8 IoCs

stealer

resource	yara_rule
behavioral2/memory/4880-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4880-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4880-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3972-2-0x0000000004060000-0x0000000004170000-memory.dmp	family_vidar_v7
behavioral2/memory/4880-22-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4880-23-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4880-40-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4880-41-0x0000000000400000-0x0000000000648000-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
4880	kat4650.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 3972 set thread context of 4880	3972	86bc655cc2d621be255c11459364357fcc424636630586bcea1c1c4b6f220460.exe	81

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	kat4650.tmp
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat4650.tmp

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4880	kat4650.tmp
4880	kat4650.tmp
4880	kat4650.tmp
4880	kat4650.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3972 wrote to memory of 4880	3972	86bc655cc2d621be255c11459364357fcc424636630586bcea1c1c4b6f220460.exe	81
PID 3972 wrote to memory of 4880	3972	86bc655cc2d621be255c11459364357fcc424636630586bcea1c1c4b6f220460.exe	81
PID 3972 wrote to memory of 4880	3972	86bc655cc2d621be255c11459364357fcc424636630586bcea1c1c4b6f220460.exe	81
PID 3972 wrote to memory of 4880	3972	86bc655cc2d621be255c11459364357fcc424636630586bcea1c1c4b6f220460.exe	81
PID 3972 wrote to memory of 4880	3972	86bc655cc2d621be255c11459364357fcc424636630586bcea1c1c4b6f220460.exe	81
PID 3972 wrote to memory of 4880	3972	86bc655cc2d621be255c11459364357fcc424636630586bcea1c1c4b6f220460.exe	81
PID 3972 wrote to memory of 4880	3972	86bc655cc2d621be255c11459364357fcc424636630586bcea1c1c4b6f220460.exe	81
PID 3972 wrote to memory of 4880	3972	86bc655cc2d621be255c11459364357fcc424636630586bcea1c1c4b6f220460.exe	81

C:\Users\Admin\AppData\Local\Temp\86bc655cc2d621be255c11459364357fcc424636630586bcea1c1c4b6f220460.exe
"C:\Users\Admin\AppData\Local\Temp\86bc655cc2d621be255c11459364357fcc424636630586bcea1c1c4b6f220460.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3972
- C:\Users\Admin\AppData\Local\Temp\kat4650.tmp
  C:\Users\Admin\AppData\Local\Temp\kat4650.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:4880

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\kat4650.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/3972-0-0x00000000007F0000-0x00000000007F1000-memory.dmp

Filesize
4KB

Download
memory/3972-9-0x0000000000400000-0x0000000000635000-memory.dmp

Filesize
2.2MB

Download
memory/3972-2-0x0000000004060000-0x0000000004170000-memory.dmp

Filesize
1.1MB

Download
memory/4880-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4880-10-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4880-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4880-22-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4880-23-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4880-25-0x0000000022800000-0x0000000022A5F000-memory.dmp

Filesize
2.4MB

Download
memory/4880-40-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4880-41-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download

Analysis

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