stealc | 5ca388811587aa2132e7e05d941f7938c9f1ab3e6a59e1249c55b1a49367a49f

Analysis

max time kernel
149s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
10/06/2024, 08:49

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General

Target
5ca388811587aa2132e7e05d941f7938c9f1ab3e6a59e1249c55b1a49367a49f.exe
Size 2.4MB
Sample240610-krax9aef7s
SHA256 5ca388811587aa2132e7e05d941f7938c9f1ab3e6a59e1249c55b1a49367a49f
MD5 e585221f07c852b3a4858a3866eb989a
SHA1 d257601b393c4656e5b585b0e1d717f232d0664d
SHA512 5957aebf953cc5b133557e4bb729d2301b7e2be63b3dc32d025ab1d06a4e9e83b85bafd353ec47663fd8a8131bc70ae02c1f7c96286961da422d18f0b3fd33f6
SSDEEP 49152:L78Cw52xsz+0csEAQACR07Q3byRD8aXY658:g52xsz+0cfAw07QLyLn
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 5 IoCs

stealer

resource	yara_rule
behavioral2/memory/2360-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2360-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2360-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2360-25-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2360-43-0x0000000000400000-0x0000000000648000-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
2360	kat687E.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 2356 set thread context of 2360	2356	5ca388811587aa2132e7e05d941f7938c9f1ab3e6a59e1249c55b1a49367a49f.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	kat687E.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2360	kat687E.tmp
2360	kat687E.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2356 wrote to memory of 2360	2356	5ca388811587aa2132e7e05d941f7938c9f1ab3e6a59e1249c55b1a49367a49f.exe	77
PID 2356 wrote to memory of 2360	2356	5ca388811587aa2132e7e05d941f7938c9f1ab3e6a59e1249c55b1a49367a49f.exe	77
PID 2356 wrote to memory of 2360	2356	5ca388811587aa2132e7e05d941f7938c9f1ab3e6a59e1249c55b1a49367a49f.exe	77
PID 2356 wrote to memory of 2360	2356	5ca388811587aa2132e7e05d941f7938c9f1ab3e6a59e1249c55b1a49367a49f.exe	77
PID 2356 wrote to memory of 2360	2356	5ca388811587aa2132e7e05d941f7938c9f1ab3e6a59e1249c55b1a49367a49f.exe	77
PID 2356 wrote to memory of 2360	2356	5ca388811587aa2132e7e05d941f7938c9f1ab3e6a59e1249c55b1a49367a49f.exe	77
PID 2356 wrote to memory of 2360	2356	5ca388811587aa2132e7e05d941f7938c9f1ab3e6a59e1249c55b1a49367a49f.exe	77
PID 2356 wrote to memory of 2360	2356	5ca388811587aa2132e7e05d941f7938c9f1ab3e6a59e1249c55b1a49367a49f.exe	77

C:\Users\Admin\AppData\Local\Temp\5ca388811587aa2132e7e05d941f7938c9f1ab3e6a59e1249c55b1a49367a49f.exe
"C:\Users\Admin\AppData\Local\Temp\5ca388811587aa2132e7e05d941f7938c9f1ab3e6a59e1249c55b1a49367a49f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2356
- C:\Users\Admin\AppData\Local\Temp\kat687E.tmp
  C:\Users\Admin\AppData\Local\Temp\kat687E.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:2360

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

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Downloads

kat687E.tmp

Path C:\Users\Admin\AppData\Local\Temp\kat687E.tmp
Size 448KB
SHA256 8cdc50bc308edd6d0f70d7c8203f0ef469daaa62ae801a00c93e6b9160fef772
MD5 d7d3e9e68f500a5362ef855382d5934b
SHA1 740495877cbcda9c61c8eb1ce3cb0c0f20738a81
SHA512 512f5d5764050274d5beb6c966c787eb50a9850ec4c4886cda14f3a912dc627d29d2cac5db7f825500041a47ce65ecc4e8f728dc934c748f6575ae17d4c2cf89
SSDEEP 12288:WNt0EArdQ0h4vglO1CYcRxJ8I4awnQb7hcr9h5Jl4:o0ESdQpglO1CxDyawn27h+9hrl4
MD5 SHA1 SHA512 SSDEEP

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memory/2356-0-0x00000000023C0000-0x00000000023C1000-memory.dmp

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memory/2356-9-0x0000000000400000-0x0000000000663000-memory.dmp

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memory/2356-1-0x0000000004100000-0x0000000004263000-memory.dmp

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memory/2360-10-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/2360-8-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/2360-4-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/2360-24-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/2360-25-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/2360-27-0x0000000026040000-0x000000002629F000-memory.dmp

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memory/2360-42-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/2360-43-0x0000000000400000-0x0000000000648000-memory.dmp

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