stealc | 2177b6c0fc0e6e25d4d05c60bc45e739c80b6b76e5761878fc2d2083866a01a4

General

Target

2177b6c0fc0e6e25d4d05c60bc45e739c80b6b76e5761878fc2d2083866a01a4.exe
Size

2.2MB
MD5

2c96eb8a35b8a369631d1bf61caf234c
SHA1

2e3510a6250b656d4dbcec4c0d8cdc8410de9449
SHA256

2177b6c0fc0e6e25d4d05c60bc45e739c80b6b76e5761878fc2d2083866a01a4
SHA512

30189986be9676302707e64904e08ea432af1affae62004b008c4f216b983c51599b4c81b5662e98078cb20a53ff2b0719f844f1e6ca751bc1d4971c5f79ffdc
SSDEEP

24576:Uc0PyhhGkCI1wUL24jtYkYGbawg757CgXueAgXDmU2MZQti1u8LnsDJY6WpEYGYG:UJ0hsA91MPB21tuuIeNHYGY0LzjsJxK

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 13 IoCs

stealer

resource	yara_rule
behavioral2/memory/4108-2-0x00000000040B0000-0x00000000041C3000-memory.dmp	family_vidar_v7
behavioral2/memory/4324-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4324-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4324-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4324-24-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4324-25-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4324-42-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4324-43-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4324-59-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4324-60-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4324-71-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4324-72-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4324-73-0x0000000000400000-0x0000000000648000-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
4324	kat8702.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 4108 set thread context of 4324	4108	2177b6c0fc0e6e25d4d05c60bc45e739c80b6b76e5761878fc2d2083866a01a4.exe	77

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	kat8702.tmp
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat8702.tmp

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4440	timeout.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4324	kat8702.tmp
4324	kat8702.tmp
4324	kat8702.tmp
4324	kat8702.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4108 wrote to memory of 4324	4108	2177b6c0fc0e6e25d4d05c60bc45e739c80b6b76e5761878fc2d2083866a01a4.exe	77
PID 4108 wrote to memory of 4324	4108	2177b6c0fc0e6e25d4d05c60bc45e739c80b6b76e5761878fc2d2083866a01a4.exe	77
PID 4108 wrote to memory of 4324	4108	2177b6c0fc0e6e25d4d05c60bc45e739c80b6b76e5761878fc2d2083866a01a4.exe	77
PID 4108 wrote to memory of 4324	4108	2177b6c0fc0e6e25d4d05c60bc45e739c80b6b76e5761878fc2d2083866a01a4.exe	77
PID 4108 wrote to memory of 4324	4108	2177b6c0fc0e6e25d4d05c60bc45e739c80b6b76e5761878fc2d2083866a01a4.exe	77
PID 4108 wrote to memory of 4324	4108	2177b6c0fc0e6e25d4d05c60bc45e739c80b6b76e5761878fc2d2083866a01a4.exe	77
PID 4108 wrote to memory of 4324	4108	2177b6c0fc0e6e25d4d05c60bc45e739c80b6b76e5761878fc2d2083866a01a4.exe	77
PID 4108 wrote to memory of 4324	4108	2177b6c0fc0e6e25d4d05c60bc45e739c80b6b76e5761878fc2d2083866a01a4.exe	77

C:\Users\Admin\AppData\Local\Temp\2177b6c0fc0e6e25d4d05c60bc45e739c80b6b76e5761878fc2d2083866a01a4.exe
"C:\Users\Admin\AppData\Local\Temp\2177b6c0fc0e6e25d4d05c60bc45e739c80b6b76e5761878fc2d2083866a01a4.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4108
- C:\Users\Admin\AppData\Local\Temp\kat8702.tmp
  C:\Users\Admin\AppData\Local\Temp\kat8702.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:4324
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat8702.tmp" & rd /s /q "C:\ProgramData\FBGIDHCAAKEB" & exit
    3⤵
    PID:2272
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:4440

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\kat8702.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/4108-9-0x0000000000400000-0x0000000000641000-memory.dmp

Filesize
2.3MB

Download
memory/4108-2-0x00000000040B0000-0x00000000041C3000-memory.dmp

Filesize
1.1MB

Download
memory/4108-0-0x00000000023A0000-0x00000000023A1000-memory.dmp

Filesize
4KB

Download
memory/4324-25-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4324-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4324-10-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4324-24-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4324-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4324-27-0x000000002D130000-0x000000002D38F000-memory.dmp

Filesize
2.4MB

Download
memory/4324-42-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4324-43-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4324-59-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4324-60-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4324-71-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4324-72-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4324-73-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing