stealc | 5f5d2d0921c6917bd07ea44fbfef38efc470942736a13283ba4e15df051c0f38

Analysis

max time kernel
143s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
14/06/2024, 06:51

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General

Target
4c3f0027d2e0e9c8664bf102fc2840e4.exe
Size 7.4MB
Sample240614-hmhfessgln
SHA256 5f5d2d0921c6917bd07ea44fbfef38efc470942736a13283ba4e15df051c0f38
MD5 4c3f0027d2e0e9c8664bf102fc2840e4
SHA1 1af682cc65c9a3c4f1f06fc1a698cf18bfeb3e12
SHA512 3baeaecaae645fe329eccabd4e9e05a589ee69edf3e60e16ed3987f2ecb5c874dc75858dfd71871ed4a116aac2f9b58822d0a2c35fcbf7a8e4e77357e63af238
SSDEEP 196608:w6Oakf78Ql8X6OAfiZ8AY/5iEvCidMtCVHb1QR:LOXDra6OP5OiEvCi+IaR
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 1 IoCs

stealer

resource	yara_rule
behavioral2/memory/456-6-0x00000000000C0000-0x0000000000E85000-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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	4c3f0027d2e0e9c8664bf102fc2840e4.exe

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
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
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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	4c3f0027d2e0e9c8664bf102fc2840e4.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2172	timeout.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
456	4c3f0027d2e0e9c8664bf102fc2840e4.exe
456	4c3f0027d2e0e9c8664bf102fc2840e4.exe
456	4c3f0027d2e0e9c8664bf102fc2840e4.exe
456	4c3f0027d2e0e9c8664bf102fc2840e4.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 456 wrote to memory of 4824	456	4c3f0027d2e0e9c8664bf102fc2840e4.exe	95
PID 456 wrote to memory of 4824	456	4c3f0027d2e0e9c8664bf102fc2840e4.exe	95
PID 456 wrote to memory of 4824	456	4c3f0027d2e0e9c8664bf102fc2840e4.exe	95
PID 4824 wrote to memory of 2172	4824	cmd.exe	97
PID 4824 wrote to memory of 2172	4824	cmd.exe	97
PID 4824 wrote to memory of 2172	4824	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\4c3f0027d2e0e9c8664bf102fc2840e4.exe
"C:\Users\Admin\AppData\Local\Temp\4c3f0027d2e0e9c8664bf102fc2840e4.exe"
1⤵
- Checks computer location settings
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:456
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\4c3f0027d2e0e9c8664bf102fc2840e4.exe" & rd /s /q "C:\ProgramData\FCAEBFIJKEBG" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4824
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 10
    3⤵
    - Delays execution with timeout.exe
    PID:2172

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4084,i,11266875042087428226,16669718873272757238,262144 --variations-seed-version --mojo-platform-channel-handle=3444 /prefetch:8
1⤵
PID:2272

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

memory/456-1-0x0000000000FE0000-0x0000000000FE1000-memory.dmp

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memory/456-4-0x0000000003790000-0x0000000003791000-memory.dmp

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memory/456-6-0x00000000000C0000-0x0000000000E85000-memory.dmp

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memory/456-3-0x0000000003780000-0x0000000003781000-memory.dmp

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memory/456-2-0x0000000000FF0000-0x0000000000FF1000-memory.dmp

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memory/456-0-0x0000000000FD0000-0x0000000000FD1000-memory.dmp

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memory/456-8-0x0000000000302000-0x000000000072A000-memory.dmp

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memory/456-5-0x00000000037A0000-0x00000000037A1000-memory.dmp

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memory/456-10-0x0000000000302000-0x000000000072A000-memory.dmp

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