stealc | eb509b5807c8b030523c284801e05b0b74005275b6b4b728ebd90730f6768117

Analysis

max time kernel
133s
max time network
244s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
07/06/2024, 02:11

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General

Target
eb509b5807c8b030523c284801e05b0b74005275b6b4b728ebd90730f6768117.exe
Size 1.8MB
Sample240607-cmrffafh8v
SHA256 eb509b5807c8b030523c284801e05b0b74005275b6b4b728ebd90730f6768117
MD5 f42a41192eb67dad4b8faec4e8e9841e
SHA1 66f5be1db3d6163a8e851c525929584be1018e04
SHA512 d53187e760383b1f07dfc5405f5d9cc432a9d511ed3b40dab60000c0846b879d313a8488d2cf6ac36a182c8f888e4b4b85b43d33f2d2105c0b9157cdc6b6b75d
SSDEEP 24576:l6z6AnPq5iak02HkoYaOV+rEfv0xwT3zxNOt4XigDSCuptNIeUaKUqm1zE:wer5l4koYa8aesY3Ot4N7G/IeUAtK
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

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/1340-2-0x0000000003EA0000-0x0000000003FEB000-memory.dmp	family_vidar_v7
behavioral2/memory/1696-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1696-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1696-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1696-25-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1696-26-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1696-43-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1696-44-0x0000000000400000-0x0000000000648000-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
1696	kat6DEC.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 1340 set thread context of 1696	1340	eb509b5807c8b030523c284801e05b0b74005275b6b4b728ebd90730f6768117.exe	72

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	kat6DEC.tmp

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1696	kat6DEC.tmp
1696	kat6DEC.tmp
1696	kat6DEC.tmp
1696	kat6DEC.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1340 wrote to memory of 1696	1340	eb509b5807c8b030523c284801e05b0b74005275b6b4b728ebd90730f6768117.exe	72
PID 1340 wrote to memory of 1696	1340	eb509b5807c8b030523c284801e05b0b74005275b6b4b728ebd90730f6768117.exe	72
PID 1340 wrote to memory of 1696	1340	eb509b5807c8b030523c284801e05b0b74005275b6b4b728ebd90730f6768117.exe	72
PID 1340 wrote to memory of 1696	1340	eb509b5807c8b030523c284801e05b0b74005275b6b4b728ebd90730f6768117.exe	72
PID 1340 wrote to memory of 1696	1340	eb509b5807c8b030523c284801e05b0b74005275b6b4b728ebd90730f6768117.exe	72
PID 1340 wrote to memory of 1696	1340	eb509b5807c8b030523c284801e05b0b74005275b6b4b728ebd90730f6768117.exe	72
PID 1340 wrote to memory of 1696	1340	eb509b5807c8b030523c284801e05b0b74005275b6b4b728ebd90730f6768117.exe	72
PID 1340 wrote to memory of 1696	1340	eb509b5807c8b030523c284801e05b0b74005275b6b4b728ebd90730f6768117.exe	72

C:\Users\Admin\AppData\Local\Temp\eb509b5807c8b030523c284801e05b0b74005275b6b4b728ebd90730f6768117.exe
"C:\Users\Admin\AppData\Local\Temp\eb509b5807c8b030523c284801e05b0b74005275b6b4b728ebd90730f6768117.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1340
- C:\Users\Admin\AppData\Local\Temp\kat6DEC.tmp
  C:\Users\Admin\AppData\Local\Temp\kat6DEC.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:1696

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

kat6DEC.tmp

Path C:\Users\Admin\AppData\Local\Temp\kat6DEC.tmp
Size 861KB
SHA256 6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
MD5 66064dbdb70a5eb15ebf3bf65aba254b
SHA1 0284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA512 b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f
SSDEEP 24576:o0ESdQpglO1CxDyawn27h+9hrlgKQY9SGcZwCdTp:o0RIglO1CuL9VNcaCd9
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1340-0-0x0000000002280000-0x0000000002281000-memory.dmp

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memory/1340-2-0x0000000003EA0000-0x0000000003FEB000-memory.dmp

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memory/1340-9-0x0000000000400000-0x00000000005C8000-memory.dmp

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memory/1696-10-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/1696-8-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/1696-4-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/1696-25-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/1696-26-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/1696-28-0x0000000025F10000-0x000000002616F000-memory.dmp

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memory/1696-43-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/1696-44-0x0000000000400000-0x0000000000648000-memory.dmp

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