stealc | 31780dfdd0ede6aacbc2370d0be7548ab0264a51b9f569712f27ffc3fcd90a78

General

Target

31780dfdd0ede6aacbc2370d0be7548ab0264a51b9f569712f27ffc3fcd90a78.exe
Size

2.4MB
MD5

27af017546fa68fc90e9f93260bcf562
SHA1

e0fa4ddf9f97f3c8ad0bdb41030afc32d697f888
SHA256

31780dfdd0ede6aacbc2370d0be7548ab0264a51b9f569712f27ffc3fcd90a78
SHA512

01254b79613f4273c674bf62fc5d36e1c462314ccb846e2e0a56c74679189838996c5ab5534b80424391ab6cda5472c2594b2b0ae206df2015d633c563ed64b2
SSDEEP

49152:jxIRJF1HL+VdX68kUGJtTF+TxMoxc1TU+j+dAzGwlrh:jEJF16dX68dGtIuoITsdZ

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
behavioral1/memory/4112-2-0x00000000041E0000-0x0000000004329000-memory.dmp	family_vidar_v7
behavioral1/memory/3640-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3640-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3640-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3640-14-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3640-15-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3640-32-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3640-33-0x0000000000400000-0x0000000000646000-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:

kat7CF0.tmp

pid process

3640 kat7CF0.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
3640	kat7CF0.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

31780dfdd0ede6aacbc2370d0be7548ab0264a51b9f569712f27ffc3fcd90a78.exe

description	pid	process	target process
PID 4112 set thread context of 3640	4112	31780dfdd0ede6aacbc2370d0be7548ab0264a51b9f569712f27ffc3fcd90a78.exe	kat7CF0.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:

kat7CF0.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat7CF0.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat7CF0.tmp

pid process

3640 kat7CF0.tmp
3640 kat7CF0.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat7CF0.tmp

pid	process
3640	kat7CF0.tmp
3640	kat7CF0.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

31780dfdd0ede6aacbc2370d0be7548ab0264a51b9f569712f27ffc3fcd90a78.exe

description	pid	process	target process
PID 4112 wrote to memory of 3640	4112	31780dfdd0ede6aacbc2370d0be7548ab0264a51b9f569712f27ffc3fcd90a78.exe	kat7CF0.tmp
PID 4112 wrote to memory of 3640	4112	31780dfdd0ede6aacbc2370d0be7548ab0264a51b9f569712f27ffc3fcd90a78.exe	kat7CF0.tmp
PID 4112 wrote to memory of 3640	4112	31780dfdd0ede6aacbc2370d0be7548ab0264a51b9f569712f27ffc3fcd90a78.exe	kat7CF0.tmp
PID 4112 wrote to memory of 3640	4112	31780dfdd0ede6aacbc2370d0be7548ab0264a51b9f569712f27ffc3fcd90a78.exe	kat7CF0.tmp
PID 4112 wrote to memory of 3640	4112	31780dfdd0ede6aacbc2370d0be7548ab0264a51b9f569712f27ffc3fcd90a78.exe	kat7CF0.tmp
PID 4112 wrote to memory of 3640	4112	31780dfdd0ede6aacbc2370d0be7548ab0264a51b9f569712f27ffc3fcd90a78.exe	kat7CF0.tmp
PID 4112 wrote to memory of 3640	4112	31780dfdd0ede6aacbc2370d0be7548ab0264a51b9f569712f27ffc3fcd90a78.exe	kat7CF0.tmp
PID 4112 wrote to memory of 3640	4112	31780dfdd0ede6aacbc2370d0be7548ab0264a51b9f569712f27ffc3fcd90a78.exe	kat7CF0.tmp

C:\Users\Admin\AppData\Local\Temp\31780dfdd0ede6aacbc2370d0be7548ab0264a51b9f569712f27ffc3fcd90a78.exe
"C:\Users\Admin\AppData\Local\Temp\31780dfdd0ede6aacbc2370d0be7548ab0264a51b9f569712f27ffc3fcd90a78.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4112

C:\Users\Admin\AppData\Local\Temp\kat7CF0.tmp
C:\Users\Admin\AppData\Local\Temp\kat7CF0.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:3640

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\kat7CF0.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/3640-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3640-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3640-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3640-14-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3640-15-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3640-17-0x000000001DC40000-0x000000001DE9F000-memory.dmp

Filesize
2.4MB

Download
memory/3640-32-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3640-33-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4112-0-0x0000000002420000-0x0000000002421000-memory.dmp

Filesize
4KB

Download
memory/4112-2-0x00000000041E0000-0x0000000004329000-memory.dmp

Filesize
1.3MB

Download
memory/4112-9-0x0000000000400000-0x0000000000678000-memory.dmp

Filesize
2.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads