stealc | c23243f0f0ed43f019f4c8b5d65830be64744600d90d21a2284fe5507d6a65c8

General

Target

c23243f0f0ed43f019f4c8b5d65830be64744600d90d21a2284fe5507d6a65c8.exe
Size

1.5MB
MD5

2fa3cf09a49df469462f4a6b6631bb6e
SHA1

155e52b6af8af33ac6c16df41860d93f81d47b8e
SHA256

c23243f0f0ed43f019f4c8b5d65830be64744600d90d21a2284fe5507d6a65c8
SHA512

66b873f77bbc6ab649f45de300d97ddebbe32afa0bcd463ef08270efd256fb2794155048ed7fd18c6ae88cd8b8e1837fc51fcaf2ae4d3796b1a79af1f5f7c557
SSDEEP

24576:FQH4MilLLfPSJO0c3ErwoD/k9wokidQrlVSP0p+vMiZOVDtplF:m5KL30O00ONyw5iqpNUONtx

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

vidar

C2

https://t.me/bu77un

https://steamcommunity.com/profiles/76561199730044335

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.1) Gecko/20100101 Firefox/128.1

Signatures

Detect Vidar Stealer 8 IoCs

stealer

resource	yara_rule
behavioral2/memory/4912-1-0x0000000004040000-0x0000000004153000-memory.dmp	family_vidar_v7
behavioral2/memory/1744-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1744-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1744-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1744-24-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1744-25-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1744-42-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1744-43-0x0000000000400000-0x0000000000648000-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
1744	kat85D9.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 4912 set thread context of 1744	4912	c23243f0f0ed43f019f4c8b5d65830be64744600d90d21a2284fe5507d6a65c8.exe	78

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	kat85D9.tmp
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat85D9.tmp

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1744	kat85D9.tmp
1744	kat85D9.tmp
1744	kat85D9.tmp
1744	kat85D9.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4912 wrote to memory of 1744	4912	c23243f0f0ed43f019f4c8b5d65830be64744600d90d21a2284fe5507d6a65c8.exe	78
PID 4912 wrote to memory of 1744	4912	c23243f0f0ed43f019f4c8b5d65830be64744600d90d21a2284fe5507d6a65c8.exe	78
PID 4912 wrote to memory of 1744	4912	c23243f0f0ed43f019f4c8b5d65830be64744600d90d21a2284fe5507d6a65c8.exe	78
PID 4912 wrote to memory of 1744	4912	c23243f0f0ed43f019f4c8b5d65830be64744600d90d21a2284fe5507d6a65c8.exe	78
PID 4912 wrote to memory of 1744	4912	c23243f0f0ed43f019f4c8b5d65830be64744600d90d21a2284fe5507d6a65c8.exe	78
PID 4912 wrote to memory of 1744	4912	c23243f0f0ed43f019f4c8b5d65830be64744600d90d21a2284fe5507d6a65c8.exe	78
PID 4912 wrote to memory of 1744	4912	c23243f0f0ed43f019f4c8b5d65830be64744600d90d21a2284fe5507d6a65c8.exe	78
PID 4912 wrote to memory of 1744	4912	c23243f0f0ed43f019f4c8b5d65830be64744600d90d21a2284fe5507d6a65c8.exe	78

C:\Users\Admin\AppData\Local\Temp\c23243f0f0ed43f019f4c8b5d65830be64744600d90d21a2284fe5507d6a65c8.exe
"C:\Users\Admin\AppData\Local\Temp\c23243f0f0ed43f019f4c8b5d65830be64744600d90d21a2284fe5507d6a65c8.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4912
- C:\Users\Admin\AppData\Local\Temp\kat85D9.tmp
  C:\Users\Admin\AppData\Local\Temp\kat85D9.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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\kat85D9.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1744-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1744-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1744-9-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1744-24-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1744-25-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1744-27-0x0000000024C80000-0x0000000024EDF000-memory.dmp

Filesize
2.4MB

Download
memory/1744-42-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1744-43-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4912-0-0x00000000024F0000-0x00000000024F1000-memory.dmp

Filesize
4KB

Download
memory/4912-1-0x0000000004040000-0x0000000004153000-memory.dmp

Filesize
1.1MB

Download
memory/4912-10-0x0000000000400000-0x000000000058E000-memory.dmp

Filesize
1.6MB

Download

Analysis

Sharing