stealc | ac1419ee574abfa919bfed5e3043b1ee45e8e158738dcc73bf3d9c8f6c883802

General

Target

ac1419ee574abfa919bfed5e3043b1ee45e8e158738dcc73bf3d9c8f6c883802.exe
Size

2.1MB
MD5

02fd894ffd0c025ddc5b2ca733b4fa9f
SHA1

036d7833032f5fd0b22a414ae527bc6f199e91d9
SHA256

ac1419ee574abfa919bfed5e3043b1ee45e8e158738dcc73bf3d9c8f6c883802
SHA512

8812877f09d026b4cc1f3f3b00d3426d03ad1ea18565bdd7ad9b9b48780c5a572fa82aefcd5a2cb0640fb5f8a4fdf11d88a9628240ae16b2c39e43a5a451a66f
SSDEEP

24576:Ub4m+sws1qLVNMIlJl6DRKbAlcNRfCK9UfMxVVtes12FxwojKr98YGeGG9iO:UZXOjt6DuAwCK9UkxVVChjHZQs

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 9 IoCs

stealer

resource	yara_rule
behavioral1/memory/3156-1-0x0000000003FC0000-0x00000000040D0000-memory.dmp	family_vidar_v7
behavioral1/memory/2216-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/2216-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/2216-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/2216-11-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/2216-12-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/2216-13-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/2216-14-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/2216-15-0x0000000000400000-0x0000000000648000-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

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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	kat4A67.tmp

Executes dropped EXE 1 IoCs

pid	Process
2216	kat4A67.tmp

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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3156 set thread context of 2216	3156	ac1419ee574abfa919bfed5e3043b1ee45e8e158738dcc73bf3d9c8f6c883802.exe	85

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	kat4A67.tmp

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4252	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2216	kat4A67.tmp
2216	kat4A67.tmp

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 3156 wrote to memory of 2216	3156	ac1419ee574abfa919bfed5e3043b1ee45e8e158738dcc73bf3d9c8f6c883802.exe	85
PID 3156 wrote to memory of 2216	3156	ac1419ee574abfa919bfed5e3043b1ee45e8e158738dcc73bf3d9c8f6c883802.exe	85
PID 3156 wrote to memory of 2216	3156	ac1419ee574abfa919bfed5e3043b1ee45e8e158738dcc73bf3d9c8f6c883802.exe	85
PID 3156 wrote to memory of 2216	3156	ac1419ee574abfa919bfed5e3043b1ee45e8e158738dcc73bf3d9c8f6c883802.exe	85
PID 3156 wrote to memory of 2216	3156	ac1419ee574abfa919bfed5e3043b1ee45e8e158738dcc73bf3d9c8f6c883802.exe	85
PID 3156 wrote to memory of 2216	3156	ac1419ee574abfa919bfed5e3043b1ee45e8e158738dcc73bf3d9c8f6c883802.exe	85
PID 3156 wrote to memory of 2216	3156	ac1419ee574abfa919bfed5e3043b1ee45e8e158738dcc73bf3d9c8f6c883802.exe	85
PID 3156 wrote to memory of 2216	3156	ac1419ee574abfa919bfed5e3043b1ee45e8e158738dcc73bf3d9c8f6c883802.exe	85
PID 2216 wrote to memory of 2604	2216	kat4A67.tmp	87
PID 2216 wrote to memory of 2604	2216	kat4A67.tmp	87
PID 2216 wrote to memory of 2604	2216	kat4A67.tmp	87
PID 2604 wrote to memory of 4252	2604	cmd.exe	89
PID 2604 wrote to memory of 4252	2604	cmd.exe	89
PID 2604 wrote to memory of 4252	2604	cmd.exe	89

C:\Users\Admin\AppData\Local\Temp\ac1419ee574abfa919bfed5e3043b1ee45e8e158738dcc73bf3d9c8f6c883802.exe
"C:\Users\Admin\AppData\Local\Temp\ac1419ee574abfa919bfed5e3043b1ee45e8e158738dcc73bf3d9c8f6c883802.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3156
- C:\Users\Admin\AppData\Local\Temp\kat4A67.tmp
  C:\Users\Admin\AppData\Local\Temp\kat4A67.tmp
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2216
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat4A67.tmp" & rd /s /q "C:\ProgramData\KKKJEBAAECBG" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2604
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:4252

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

3

T1012

System Information Discovery

3

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\kat4A67.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2216-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2216-9-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2216-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2216-11-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2216-12-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2216-13-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2216-14-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2216-15-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3156-0-0x0000000002290000-0x0000000002291000-memory.dmp

Filesize
4KB

Download
memory/3156-1-0x0000000003FC0000-0x00000000040D0000-memory.dmp

Filesize
1.1MB

Download
memory/3156-10-0x0000000000400000-0x0000000000629000-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