stealc | 8dd5303574d1139eb32f3d974c3e7f8028f239b75db7f2723d3b215b771b182c

General

Target

8dd5303574d1139eb32f3d974c3e7f8028f239b75db7f2723d3b215b771b182c.exe
Size

1.9MB
MD5

0b9c39a0be0ab2bd1317486bbb3a133a
SHA1

3ab5156839e02bd89b39f9d2b01b234e315e3015
SHA256

8dd5303574d1139eb32f3d974c3e7f8028f239b75db7f2723d3b215b771b182c
SHA512

e65d555537f3248ed270d02864ae6f28df9f8ec2e2799309a28a199fa62183ebe45fe37b796bef4d3bddc941229059e19f378423837332849224410900c6d9a1
SSDEEP

49152:CdKfTn6v2JtTF+TxMoxc1TU+j+dAzGwlrh:CdKfTnFtIuoITsdZ

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://steamcommunity.com/profiles/76561199689717899

https://t.me/copterwin

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Signatures

Detect Vidar Stealer 8 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/2440-2-0x0000000004020000-0x0000000004169000-memory.dmp	family_vidar_v7
behavioral2/memory/3568-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3568-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3568-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3568-19-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3568-20-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3568-37-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3568-38-0x0000000000400000-0x0000000000646000-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

Processes:

kat6B4D.tmp

pid process

3568 kat6B4D.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

pid	process
3568	kat6B4D.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

8dd5303574d1139eb32f3d974c3e7f8028f239b75db7f2723d3b215b771b182c.exe

description	pid	process	target process
PID 2440 set thread context of 3568	2440	8dd5303574d1139eb32f3d974c3e7f8028f239b75db7f2723d3b215b771b182c.exe	kat6B4D.tmp

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

Processes:

kat6B4D.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat6B4D.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat6B4D.tmp

pid process

3568 kat6B4D.tmp
3568 kat6B4D.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat6B4D.tmp

pid	process
3568	kat6B4D.tmp
3568	kat6B4D.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

8dd5303574d1139eb32f3d974c3e7f8028f239b75db7f2723d3b215b771b182c.exe

description	pid	process	target process
PID 2440 wrote to memory of 3568	2440	8dd5303574d1139eb32f3d974c3e7f8028f239b75db7f2723d3b215b771b182c.exe	kat6B4D.tmp
PID 2440 wrote to memory of 3568	2440	8dd5303574d1139eb32f3d974c3e7f8028f239b75db7f2723d3b215b771b182c.exe	kat6B4D.tmp
PID 2440 wrote to memory of 3568	2440	8dd5303574d1139eb32f3d974c3e7f8028f239b75db7f2723d3b215b771b182c.exe	kat6B4D.tmp
PID 2440 wrote to memory of 3568	2440	8dd5303574d1139eb32f3d974c3e7f8028f239b75db7f2723d3b215b771b182c.exe	kat6B4D.tmp
PID 2440 wrote to memory of 3568	2440	8dd5303574d1139eb32f3d974c3e7f8028f239b75db7f2723d3b215b771b182c.exe	kat6B4D.tmp
PID 2440 wrote to memory of 3568	2440	8dd5303574d1139eb32f3d974c3e7f8028f239b75db7f2723d3b215b771b182c.exe	kat6B4D.tmp
PID 2440 wrote to memory of 3568	2440	8dd5303574d1139eb32f3d974c3e7f8028f239b75db7f2723d3b215b771b182c.exe	kat6B4D.tmp
PID 2440 wrote to memory of 3568	2440	8dd5303574d1139eb32f3d974c3e7f8028f239b75db7f2723d3b215b771b182c.exe	kat6B4D.tmp

C:\Users\Admin\AppData\Local\Temp\8dd5303574d1139eb32f3d974c3e7f8028f239b75db7f2723d3b215b771b182c.exe
"C:\Users\Admin\AppData\Local\Temp\8dd5303574d1139eb32f3d974c3e7f8028f239b75db7f2723d3b215b771b182c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2440

C:\Users\Admin\AppData\Local\Temp\kat6B4D.tmp
C:\Users\Admin\AppData\Local\Temp\kat6B4D.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:3568

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat6B4D.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2440-0-0x00000000008A0000-0x00000000008A1000-memory.dmp

Filesize
4KB

Download
memory/2440-2-0x0000000004020000-0x0000000004169000-memory.dmp

Filesize
1.3MB

Download
memory/2440-10-0x0000000000400000-0x00000000005EC000-memory.dmp

Filesize
1.9MB

Download
memory/3568-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3568-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3568-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3568-19-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3568-20-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3568-22-0x00000000260E0000-0x000000002633F000-memory.dmp

Filesize
2.4MB

Download
memory/3568-37-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3568-38-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads