stealc | 38d16dccfd335cf95f05ab43376b79a0f6f622a8252cc96b33c68fc5a263f8b8

General

Target

38d16dccfd335cf95f05ab43376b79a0f6f622a8252cc96b33c68fc5a263f8b8.exe
Size

2.1MB
MD5

c49af08976d8324f556866373969b576
SHA1

c4334b02493de064d9d26f5f482d24670bf7c343
SHA256

38d16dccfd335cf95f05ab43376b79a0f6f622a8252cc96b33c68fc5a263f8b8
SHA512

3d85e000b517e935023dbadb7e86f027e3e280c3b090eab9dea3159e0b38398f32a7bfb0e8a3a7329703b2adaf59b072920cced88a4262338a35473119cf86c2
SSDEEP

24576:Ub4m+sws1qLVNMIlJl6DRKbAlcNRfCKFUfMxVVtes12FxwojKr98YGeGG9iO:UZXOjt6DuAwCKFUkxVVChjHZQs

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
behavioral1/memory/2004-1-0x0000000002AF0000-0x0000000002C00000-memory.dmp	family_vidar_v7
behavioral1/memory/744-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/744-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/744-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/744-11-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/744-12-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/744-22-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/744-23-0x0000000000400000-0x0000000000648000-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
744	katACD5.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 2004 set thread context of 744	2004	38d16dccfd335cf95f05ab43376b79a0f6f622a8252cc96b33c68fc5a263f8b8.exe	92

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	katACD5.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
744	katACD5.tmp
744	katACD5.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2004 wrote to memory of 744	2004	38d16dccfd335cf95f05ab43376b79a0f6f622a8252cc96b33c68fc5a263f8b8.exe	92
PID 2004 wrote to memory of 744	2004	38d16dccfd335cf95f05ab43376b79a0f6f622a8252cc96b33c68fc5a263f8b8.exe	92
PID 2004 wrote to memory of 744	2004	38d16dccfd335cf95f05ab43376b79a0f6f622a8252cc96b33c68fc5a263f8b8.exe	92
PID 2004 wrote to memory of 744	2004	38d16dccfd335cf95f05ab43376b79a0f6f622a8252cc96b33c68fc5a263f8b8.exe	92
PID 2004 wrote to memory of 744	2004	38d16dccfd335cf95f05ab43376b79a0f6f622a8252cc96b33c68fc5a263f8b8.exe	92
PID 2004 wrote to memory of 744	2004	38d16dccfd335cf95f05ab43376b79a0f6f622a8252cc96b33c68fc5a263f8b8.exe	92
PID 2004 wrote to memory of 744	2004	38d16dccfd335cf95f05ab43376b79a0f6f622a8252cc96b33c68fc5a263f8b8.exe	92
PID 2004 wrote to memory of 744	2004	38d16dccfd335cf95f05ab43376b79a0f6f622a8252cc96b33c68fc5a263f8b8.exe	92

C:\Users\Admin\AppData\Local\Temp\38d16dccfd335cf95f05ab43376b79a0f6f622a8252cc96b33c68fc5a263f8b8.exe
"C:\Users\Admin\AppData\Local\Temp\38d16dccfd335cf95f05ab43376b79a0f6f622a8252cc96b33c68fc5a263f8b8.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2004
- C:\Users\Admin\AppData\Local\Temp\katACD5.tmp
  C:\Users\Admin\AppData\Local\Temp\katACD5.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:744

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 --field-trial-handle=4264,i,5229431749694857451,16836185654682871752,262144 --variations-seed-version --mojo-platform-channel-handle=3864 /prefetch:8
1⤵
PID:1792

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\katACD5.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/744-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/744-9-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/744-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/744-11-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/744-12-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/744-14-0x0000000023AF0000-0x0000000023D4F000-memory.dmp

Filesize
2.4MB

Download
memory/744-22-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/744-23-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2004-0-0x00000000025D0000-0x00000000025D1000-memory.dmp

Filesize
4KB

Download
memory/2004-1-0x0000000002AF0000-0x0000000002C00000-memory.dmp

Filesize
1.1MB

Download
memory/2004-10-0x0000000000400000-0x0000000000629000-memory.dmp

Filesize
2.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads