stealc | f77e65342b20168a8de9f19eff0e117fc7096a567b96ed89aafe68adc15cda3f

General

Target

f77e65342b20168a8de9f19eff0e117fc7096a567b96ed89aafe68adc15cda3f.exe
Size

2.2MB
MD5

245fbab49ab498f83ffb66b560787e13
SHA1

f0f0755647aea3d863fee4f3ccaf8e6adc589370
SHA256

f77e65342b20168a8de9f19eff0e117fc7096a567b96ed89aafe68adc15cda3f
SHA512

33fba34d8def8aa7217d657aa9fd30e83dc69abb71355ea309ca8089d81249793f7be951ca7ff2fddb178d50e14f3ed219364578e8d1644794cf9909cf83095b
SSDEEP

49152:qpjNvr9ySAOmw4dHHO+SASagXkJr4MDkUwm:qpjNp7p4dHH8n5A

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

vidar

C2

https://t.me/g067n

https://steamcommunity.com/profiles/76561199707802586

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:129.0) Gecko/20100101 Firefox/129.0

Signatures

Detect Vidar Stealer 9 IoCs

stealer

resource	yara_rule
behavioral2/memory/4952-1-0x0000000004070000-0x0000000004180000-memory.dmp	family_vidar_v7
behavioral2/memory/4056-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4056-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4056-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4056-11-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4056-12-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4056-13-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4056-14-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4056-15-0x0000000000400000-0x0000000000648000-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

Executes dropped EXE 1 IoCs

pid	Process
4056	kat7223.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 4952 set thread context of 4056	4952	f77e65342b20168a8de9f19eff0e117fc7096a567b96ed89aafe68adc15cda3f.exe	77

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 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	kat7223.tmp
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat7223.tmp

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3200	timeout.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4056	kat7223.tmp
4056	kat7223.tmp
4056	kat7223.tmp
4056	kat7223.tmp
4056	kat7223.tmp
4056	kat7223.tmp

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4952 wrote to memory of 4056	4952	f77e65342b20168a8de9f19eff0e117fc7096a567b96ed89aafe68adc15cda3f.exe	77
PID 4952 wrote to memory of 4056	4952	f77e65342b20168a8de9f19eff0e117fc7096a567b96ed89aafe68adc15cda3f.exe	77
PID 4952 wrote to memory of 4056	4952	f77e65342b20168a8de9f19eff0e117fc7096a567b96ed89aafe68adc15cda3f.exe	77
PID 4952 wrote to memory of 4056	4952	f77e65342b20168a8de9f19eff0e117fc7096a567b96ed89aafe68adc15cda3f.exe	77
PID 4952 wrote to memory of 4056	4952	f77e65342b20168a8de9f19eff0e117fc7096a567b96ed89aafe68adc15cda3f.exe	77
PID 4952 wrote to memory of 4056	4952	f77e65342b20168a8de9f19eff0e117fc7096a567b96ed89aafe68adc15cda3f.exe	77
PID 4952 wrote to memory of 4056	4952	f77e65342b20168a8de9f19eff0e117fc7096a567b96ed89aafe68adc15cda3f.exe	77
PID 4952 wrote to memory of 4056	4952	f77e65342b20168a8de9f19eff0e117fc7096a567b96ed89aafe68adc15cda3f.exe	77
PID 4056 wrote to memory of 740	4056	kat7223.tmp	79
PID 4056 wrote to memory of 740	4056	kat7223.tmp	79
PID 4056 wrote to memory of 740	4056	kat7223.tmp	79
PID 740 wrote to memory of 3200	740	cmd.exe	81
PID 740 wrote to memory of 3200	740	cmd.exe	81
PID 740 wrote to memory of 3200	740	cmd.exe	81

C:\Users\Admin\AppData\Local\Temp\f77e65342b20168a8de9f19eff0e117fc7096a567b96ed89aafe68adc15cda3f.exe
"C:\Users\Admin\AppData\Local\Temp\f77e65342b20168a8de9f19eff0e117fc7096a567b96ed89aafe68adc15cda3f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4952
- C:\Users\Admin\AppData\Local\Temp\kat7223.tmp
  C:\Users\Admin\AppData\Local\Temp\kat7223.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4056
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat7223.tmp" & rd /s /q "C:\ProgramData\CGHDAKKJJJKJ" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:740
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:3200

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

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat7223.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/4056-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4056-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4056-9-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4056-11-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4056-12-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4056-13-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4056-14-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4056-15-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4952-0-0x00000000008F0000-0x00000000008F1000-memory.dmp

Filesize
4KB

Download
memory/4952-1-0x0000000004070000-0x0000000004180000-memory.dmp

Filesize
1.1MB

Download
memory/4952-10-0x0000000000400000-0x0000000000635000-memory.dmp

Filesize
2.2MB

Download

Analysis

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