stealc | a24f1ae9f9cc7bfa55150e66d79bed1045fb33141754f34cec2dbb42dc613b8c

Analysis

max time kernel
129s
max time network
299s
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, 00:42

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General

Target
a24f1ae9f9cc7bfa55150e66d79bed1045fb33141754f34cec2dbb42dc613b8c.exe
Size 2.4MB
Sample240607-a2hqqsff47
SHA256 a24f1ae9f9cc7bfa55150e66d79bed1045fb33141754f34cec2dbb42dc613b8c
MD5 df1fea90f15903a62cdc7cd69fa172bb
SHA1 92211b157714b7dbd50e6a323d8c90ca2b29c0b8
SHA512 1db3d8caeb90fd0138e0094e29647d0a7dd495a23773feeb6273298cbd66f519c8a96561a07804e0284d381a88e4fe5ea7b2bbec4c4a99289aa2ff591b97172a
SSDEEP 49152:wQc81KnB/a/hNT/dFYa8aesY3Ot4N7G/:wDta/hNT/dFn0etD/
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/ta904ek
https://steamcommunity.com/profiles/76561199695752269

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/4444-2-0x0000000003EB0000-0x0000000003FFC000-memory.dmp	family_vidar_v7
behavioral2/memory/360-4-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/360-10-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/360-8-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/360-25-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/360-26-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/360-43-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/360-44-0x0000000000400000-0x0000000000649000-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
360	katE5FB.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 4444 set thread context of 360	4444	a24f1ae9f9cc7bfa55150e66d79bed1045fb33141754f34cec2dbb42dc613b8c.exe	73

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	katE5FB.tmp

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
360	katE5FB.tmp
360	katE5FB.tmp
360	katE5FB.tmp
360	katE5FB.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4444 wrote to memory of 360	4444	a24f1ae9f9cc7bfa55150e66d79bed1045fb33141754f34cec2dbb42dc613b8c.exe	73
PID 4444 wrote to memory of 360	4444	a24f1ae9f9cc7bfa55150e66d79bed1045fb33141754f34cec2dbb42dc613b8c.exe	73
PID 4444 wrote to memory of 360	4444	a24f1ae9f9cc7bfa55150e66d79bed1045fb33141754f34cec2dbb42dc613b8c.exe	73
PID 4444 wrote to memory of 360	4444	a24f1ae9f9cc7bfa55150e66d79bed1045fb33141754f34cec2dbb42dc613b8c.exe	73
PID 4444 wrote to memory of 360	4444	a24f1ae9f9cc7bfa55150e66d79bed1045fb33141754f34cec2dbb42dc613b8c.exe	73
PID 4444 wrote to memory of 360	4444	a24f1ae9f9cc7bfa55150e66d79bed1045fb33141754f34cec2dbb42dc613b8c.exe	73
PID 4444 wrote to memory of 360	4444	a24f1ae9f9cc7bfa55150e66d79bed1045fb33141754f34cec2dbb42dc613b8c.exe	73
PID 4444 wrote to memory of 360	4444	a24f1ae9f9cc7bfa55150e66d79bed1045fb33141754f34cec2dbb42dc613b8c.exe	73

C:\Users\Admin\AppData\Local\Temp\a24f1ae9f9cc7bfa55150e66d79bed1045fb33141754f34cec2dbb42dc613b8c.exe
"C:\Users\Admin\AppData\Local\Temp\a24f1ae9f9cc7bfa55150e66d79bed1045fb33141754f34cec2dbb42dc613b8c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4444
- C:\Users\Admin\AppData\Local\Temp\katE5FB.tmp
  C:\Users\Admin\AppData\Local\Temp\katE5FB.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:360

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

katE5FB.tmp

Path C:\Users\Admin\AppData\Local\Temp\katE5FB.tmp
Size 861KB
SHA256 6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
MD5 66064dbdb70a5eb15ebf3bf65aba254b
SHA1 0284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA512 b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f
SSDEEP 24576:o0ESdQpglO1CxDyawn27h+9hrlgKQY9SGcZwCdTp:o0RIglO1CuL9VNcaCd9
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/360-4-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/360-10-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/360-8-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/360-25-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/360-26-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/360-28-0x0000000025EC0000-0x000000002611F000-memory.dmp

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memory/360-43-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/360-44-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/4444-0-0x00000000008F0000-0x00000000008F1000-memory.dmp

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memory/4444-2-0x0000000003EB0000-0x0000000003FFC000-memory.dmp

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memory/4444-9-0x0000000000400000-0x0000000000663000-memory.dmp

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