stealc | 763a8a66d25df98070582790c96d642b2e5427ccd38e6cf90429e10cfad8d2b0

General

Target

763a8a66d25df98070582790c96d642b2e5427ccd38e6cf90429e10cfad8d2b0.exe
Size

2.1MB
MD5

96ad57f4abbdcdc54cd43ff4cc7c3e6d
SHA1

c0463a4fa84da4e4ea4ad9f7bcf160a523c59945
SHA256

763a8a66d25df98070582790c96d642b2e5427ccd38e6cf90429e10cfad8d2b0
SHA512

da8fa64e8d5817a9e2fae2c5b3268ce7abae36bc9f27647bc7b4dbd75e15a47a6265a8d9b77a144c6828907fd757f0f2e4200df3da2a6bbe4ab50fa0f2ba168b
SSDEEP

49152:N6uDuaS9refmwJtTF+TxMoxc1TU+j+dAzGwlrh:N6uKb9TwtIuoITsdZ

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 14 IoCs

stealer

Processes:

resource	yara_rule
behavioral1/memory/4628-1-0x0000000004020000-0x0000000004169000-memory.dmp	family_vidar_v7
behavioral1/memory/1320-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1320-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1320-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1320-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1320-18-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1320-35-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1320-36-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1320-52-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1320-53-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1320-64-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1320-65-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1320-66-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1320-67-0x0000000000400000-0x0000000000646000-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

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

Processes:

kat473A.tmp

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	kat473A.tmp

Executes dropped EXE 1 IoCs

Processes:

kat473A.tmp

pid process

1320 kat473A.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
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
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
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

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

pid	process
1320	kat473A.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

763a8a66d25df98070582790c96d642b2e5427ccd38e6cf90429e10cfad8d2b0.exe

description	pid	process	target process
PID 4628 set thread context of 1320	4628	763a8a66d25df98070582790c96d642b2e5427ccd38e6cf90429e10cfad8d2b0.exe	kat473A.tmp

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

Processes:

kat473A.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat473A.tmp
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

3680 timeout.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

kat473A.tmp

pid process

1320 kat473A.tmp
1320 kat473A.tmp
1320 kat473A.tmp
1320 kat473A.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat473A.tmp

pid	process
3680	timeout.exe

pid	process
1320	kat473A.tmp
1320	kat473A.tmp
1320	kat473A.tmp
1320	kat473A.tmp

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

763a8a66d25df98070582790c96d642b2e5427ccd38e6cf90429e10cfad8d2b0.exekat473A.tmpcmd.exe

description	pid	process	target process
PID 4628 wrote to memory of 1320	4628	763a8a66d25df98070582790c96d642b2e5427ccd38e6cf90429e10cfad8d2b0.exe	kat473A.tmp
PID 4628 wrote to memory of 1320	4628	763a8a66d25df98070582790c96d642b2e5427ccd38e6cf90429e10cfad8d2b0.exe	kat473A.tmp
PID 4628 wrote to memory of 1320	4628	763a8a66d25df98070582790c96d642b2e5427ccd38e6cf90429e10cfad8d2b0.exe	kat473A.tmp
PID 4628 wrote to memory of 1320	4628	763a8a66d25df98070582790c96d642b2e5427ccd38e6cf90429e10cfad8d2b0.exe	kat473A.tmp
PID 4628 wrote to memory of 1320	4628	763a8a66d25df98070582790c96d642b2e5427ccd38e6cf90429e10cfad8d2b0.exe	kat473A.tmp
PID 4628 wrote to memory of 1320	4628	763a8a66d25df98070582790c96d642b2e5427ccd38e6cf90429e10cfad8d2b0.exe	kat473A.tmp
PID 4628 wrote to memory of 1320	4628	763a8a66d25df98070582790c96d642b2e5427ccd38e6cf90429e10cfad8d2b0.exe	kat473A.tmp
PID 4628 wrote to memory of 1320	4628	763a8a66d25df98070582790c96d642b2e5427ccd38e6cf90429e10cfad8d2b0.exe	kat473A.tmp
PID 1320 wrote to memory of 4836	1320	kat473A.tmp	cmd.exe
PID 1320 wrote to memory of 4836	1320	kat473A.tmp	cmd.exe
PID 1320 wrote to memory of 4836	1320	kat473A.tmp	cmd.exe
PID 4836 wrote to memory of 3680	4836	cmd.exe	timeout.exe
PID 4836 wrote to memory of 3680	4836	cmd.exe	timeout.exe
PID 4836 wrote to memory of 3680	4836	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\763a8a66d25df98070582790c96d642b2e5427ccd38e6cf90429e10cfad8d2b0.exe
"C:\Users\Admin\AppData\Local\Temp\763a8a66d25df98070582790c96d642b2e5427ccd38e6cf90429e10cfad8d2b0.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4628
- C:\Users\Admin\AppData\Local\Temp\kat473A.tmp
  C:\Users\Admin\AppData\Local\Temp\kat473A.tmp
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1320
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat473A.tmp" & rd /s /q "C:\ProgramData\GHJKECAAAFHJ" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4836
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:3680

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

4

T1552

Credentials In Files

4

T1552.001

Discovery

Query Registry

3

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Data from Local System

4

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat473A.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1320-18-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1320-36-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1320-20-0x000000001B780000-0x000000001B9DF000-memory.dmp

Filesize
2.4MB

Download
memory/1320-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1320-35-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1320-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1320-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1320-65-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1320-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1320-67-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1320-66-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1320-52-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1320-53-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1320-64-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4628-10-0x0000000000400000-0x000000000061C000-memory.dmp

Filesize
2.1MB

Download
memory/4628-0-0x0000000002270000-0x0000000002271000-memory.dmp

Filesize
4KB

Download
memory/4628-1-0x0000000004020000-0x0000000004169000-memory.dmp

Filesize
1.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads