stealc | 2177b6c0fc0e6e25d4d05c60bc45e739c80b6b76e5761878fc2d2083866a01a4

Analysis

max time kernel
9s
max time network
135s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
30-06-2024 21:03

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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

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

Processes:

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

Processes:

kat8702.tmp

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

Processes:

2177b6c0fc0e6e25d4d05c60bc45e739c80b6b76e5761878fc2d2083866a01a4.exe

description pid process target process

PID 4108 set thread context of 4324 4108 2177b6c0fc0e6e25d4d05c60bc45e739c80b6b76e5761878fc2d2083866a01a4.exe kat8702.tmp

pid	process
4324	kat8702.tmp

description	pid	process	target process
PID 4108 set thread context of 4324	4108	2177b6c0fc0e6e25d4d05c60bc45e739c80b6b76e5761878fc2d2083866a01a4.exe	kat8702.tmp

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

Processes:

kat8702.tmp

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

Processes:

timeout.exe

pid process

4440 timeout.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

kat8702.tmp

pid process

4324 kat8702.tmp
4324 kat8702.tmp
4324 kat8702.tmp
4324 kat8702.tmp

pid	process
4440	timeout.exe

pid	process
4324	kat8702.tmp
4324	kat8702.tmp
4324	kat8702.tmp
4324	kat8702.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

2177b6c0fc0e6e25d4d05c60bc45e739c80b6b76e5761878fc2d2083866a01a4.exe

description	pid	process	target process
PID 4108 wrote to memory of 4324	4108	2177b6c0fc0e6e25d4d05c60bc45e739c80b6b76e5761878fc2d2083866a01a4.exe	kat8702.tmp
PID 4108 wrote to memory of 4324	4108	2177b6c0fc0e6e25d4d05c60bc45e739c80b6b76e5761878fc2d2083866a01a4.exe	kat8702.tmp
PID 4108 wrote to memory of 4324	4108	2177b6c0fc0e6e25d4d05c60bc45e739c80b6b76e5761878fc2d2083866a01a4.exe	kat8702.tmp
PID 4108 wrote to memory of 4324	4108	2177b6c0fc0e6e25d4d05c60bc45e739c80b6b76e5761878fc2d2083866a01a4.exe	kat8702.tmp
PID 4108 wrote to memory of 4324	4108	2177b6c0fc0e6e25d4d05c60bc45e739c80b6b76e5761878fc2d2083866a01a4.exe	kat8702.tmp
PID 4108 wrote to memory of 4324	4108	2177b6c0fc0e6e25d4d05c60bc45e739c80b6b76e5761878fc2d2083866a01a4.exe	kat8702.tmp
PID 4108 wrote to memory of 4324	4108	2177b6c0fc0e6e25d4d05c60bc45e739c80b6b76e5761878fc2d2083866a01a4.exe	kat8702.tmp
PID 4108 wrote to memory of 4324	4108	2177b6c0fc0e6e25d4d05c60bc45e739c80b6b76e5761878fc2d2083866a01a4.exe	kat8702.tmp

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 Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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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