stealc | 4064eb708aa0dfb0ed7c50128ff9a6e9f67d7d77636abd01c1afb093b30770e8

General

Target

4064eb708aa0dfb0ed7c50128ff9a6e9f67d7d77636abd01c1afb093b30770e8.exe
Size

1.8MB
MD5

c125a02347e4b86e8467434066012f63
SHA1

cae8c7458c4b31027605360b1524dad4a88d1f2c
SHA256

4064eb708aa0dfb0ed7c50128ff9a6e9f67d7d77636abd01c1afb093b30770e8
SHA512

2068325799c13312653cb1b6bdda124be77c670c1de98671ad5846c6693aec2009bc3ebcdd607073df4c3bed96ad79c738ae09700429b02c13e9be12f3074e69
SSDEEP

24576:l6z6AnPq5iak02HkUYaOV+rEfv0xwT3zxNOt4XigDSCuptNIeUaKUqm1zE:wer5l4kUYa8aesY3Ot4N7G/IeUAtK

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://t.me/r8z0l

https://steamcommunity.com/profiles/76561199698764354

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

resource	yara_rule
behavioral2/memory/2628-1-0x0000000004090000-0x00000000041DB000-memory.dmp	family_vidar_v7
behavioral2/memory/328-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/328-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/328-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/328-15-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/328-16-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/328-33-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/328-34-0x0000000000400000-0x0000000000648000-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
328	kat923D.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 2628 set thread context of 328	2628	4064eb708aa0dfb0ed7c50128ff9a6e9f67d7d77636abd01c1afb093b30770e8.exe	77

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

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat923D.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
328	kat923D.tmp
328	kat923D.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2628 wrote to memory of 328	2628	4064eb708aa0dfb0ed7c50128ff9a6e9f67d7d77636abd01c1afb093b30770e8.exe	77
PID 2628 wrote to memory of 328	2628	4064eb708aa0dfb0ed7c50128ff9a6e9f67d7d77636abd01c1afb093b30770e8.exe	77
PID 2628 wrote to memory of 328	2628	4064eb708aa0dfb0ed7c50128ff9a6e9f67d7d77636abd01c1afb093b30770e8.exe	77
PID 2628 wrote to memory of 328	2628	4064eb708aa0dfb0ed7c50128ff9a6e9f67d7d77636abd01c1afb093b30770e8.exe	77
PID 2628 wrote to memory of 328	2628	4064eb708aa0dfb0ed7c50128ff9a6e9f67d7d77636abd01c1afb093b30770e8.exe	77
PID 2628 wrote to memory of 328	2628	4064eb708aa0dfb0ed7c50128ff9a6e9f67d7d77636abd01c1afb093b30770e8.exe	77
PID 2628 wrote to memory of 328	2628	4064eb708aa0dfb0ed7c50128ff9a6e9f67d7d77636abd01c1afb093b30770e8.exe	77
PID 2628 wrote to memory of 328	2628	4064eb708aa0dfb0ed7c50128ff9a6e9f67d7d77636abd01c1afb093b30770e8.exe	77

C:\Users\Admin\AppData\Local\Temp\4064eb708aa0dfb0ed7c50128ff9a6e9f67d7d77636abd01c1afb093b30770e8.exe
"C:\Users\Admin\AppData\Local\Temp\4064eb708aa0dfb0ed7c50128ff9a6e9f67d7d77636abd01c1afb093b30770e8.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2628
- C:\Users\Admin\AppData\Local\Temp\kat923D.tmp
  C:\Users\Admin\AppData\Local\Temp\kat923D.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:328

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat923D.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/328-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/328-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/328-9-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/328-15-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/328-16-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/328-18-0x0000000019400000-0x000000001965F000-memory.dmp

Filesize
2.4MB

Download
memory/328-33-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/328-34-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2628-0-0x0000000002320000-0x0000000002321000-memory.dmp

Filesize
4KB

Download
memory/2628-1-0x0000000004090000-0x00000000041DB000-memory.dmp

Filesize
1.3MB

Download
memory/2628-10-0x0000000000400000-0x00000000005C8000-memory.dmp

Filesize
1.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads