stealc | 12ac029fdde1e9af0c26344857f4da6c2c0851c2d639afced5402858ffa9e23b

General

Target

@!^Installer_PC_Setup_3355_?@??????_^/Setup.exe
Size

316KB
MD5

c637e5ecf625b72f4bef9d28cd81d612
SHA1

a2c1329d290e508ee9fd0eb81e7f25d57e450f8c
SHA256

111c56593668be63e1e0c79a2d33d9e2d49cdf0c5100663c72045bc6b76e9fe6
SHA512

727d78bab4fab3674eec92ca5f07df6a0095ab3b973dd227c599c70e8493592bb53bb9208cc6270713283ef0065acfad3203ddcf4dcb6d43f8727f09ceaaf2e4
SSDEEP

6144:VzsRSKkhKKXDD2mTLGxelHJ+SBae3VFpSX:6VkhZWEGxelH0SBtfpS

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 2 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/836-22-0x0000000000B80000-0x00000000012CB000-memory.dmp	family_vidar_v7
behavioral2/memory/836-37-0x0000000000B80000-0x00000000012CB000-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

Processes:

coml.au3

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation coml.au3
Loads dropped DLL 1 IoCs

Processes:

coml.au3

pid process

836 coml.au3
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

Processes:

Setup.exe

description pid process target process

PID 1376 set thread context of 1876 1376 Setup.exe netsh.exe
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:

coml.au3

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString coml.au3
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

1836 timeout.exe
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

Setup.exenetsh.execoml.au3

pid process

1376 Setup.exe
1376 Setup.exe
1876 netsh.exe
1876 netsh.exe
836 coml.au3
836 coml.au3
Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

Setup.exenetsh.exe

pid process

1376 Setup.exe
1876 netsh.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	coml.au3

pid	process
836	coml.au3

description	pid	process	target process
PID 1376 set thread context of 1876	1376	Setup.exe	netsh.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	coml.au3

pid	process
1836	timeout.exe

pid	process
1376	Setup.exe
1376	Setup.exe
1876	netsh.exe
1876	netsh.exe
836	coml.au3
836	coml.au3

pid	process
1376	Setup.exe
1876	netsh.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

Setup.exenetsh.execoml.au3cmd.exe

description	pid	process	target process
PID 1376 wrote to memory of 1876	1376	Setup.exe	netsh.exe
PID 1376 wrote to memory of 1876	1376	Setup.exe	netsh.exe
PID 1376 wrote to memory of 1876	1376	Setup.exe	netsh.exe
PID 1376 wrote to memory of 1876	1376	Setup.exe	netsh.exe
PID 1876 wrote to memory of 836	1876	netsh.exe	coml.au3
PID 1876 wrote to memory of 836	1876	netsh.exe	coml.au3
PID 1876 wrote to memory of 836	1876	netsh.exe	coml.au3
PID 1876 wrote to memory of 836	1876	netsh.exe	coml.au3
PID 1876 wrote to memory of 836	1876	netsh.exe	coml.au3
PID 836 wrote to memory of 4332	836	coml.au3	cmd.exe
PID 836 wrote to memory of 4332	836	coml.au3	cmd.exe
PID 836 wrote to memory of 4332	836	coml.au3	cmd.exe
PID 4332 wrote to memory of 1836	4332	cmd.exe	timeout.exe
PID 4332 wrote to memory of 1836	4332	cmd.exe	timeout.exe
PID 4332 wrote to memory of 1836	4332	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\@!^Installer_PC_Setup_3355__@_______^\Setup.exe
"C:\Users\Admin\AppData\Local\Temp\@!^Installer_PC_Setup_3355__@_______^\Setup.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1376

C:\Windows\SysWOW64\netsh.exe
C:\Windows\SysWOW64\netsh.exe
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1876

C:\Users\Admin\AppData\Local\Temp\coml.au3
C:\Users\Admin\AppData\Local\Temp\coml.au3
3⤵
- Checks computer location settings
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:836

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\coml.au3" & rd /s /q "C:\ProgramData\DAFIEHIEGDHI" & exit
4⤵
- Suspicious use of WriteProcessMemory
PID:4332

C:\Windows\SysWOW64\timeout.exe
timeout /t 10
5⤵
- Delays execution with timeout.exe
PID:1836

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\ae6bf9e7
Filesize
6.8MB

MD5
69c38961d128cf9b8c90ea90cfe874d0

SHA1
2a1cdfa0143458c9d4723c5dd496620506ac4d18

SHA256
f2f0aca432838cc01c5f2ee85c1f1faa8d9fedd9807a63b549dcbe2f1bbd7976

SHA512
364565b61ad3a12c9e5d30853365f000b37bcad60ec340b9d448be886b3ce78086aa91fa09515e796c783b7beec552edda36d40f9e4f96e1492abcb36cbd7792

Download Submit
C:\Users\Admin\AppData\Local\Temp\coml.au3
Filesize
872KB

MD5
c56b5f0201a3b3de53e561fe76912bfd

SHA1
2a4062e10a5de813f5688221dbeb3f3ff33eb417

SHA256
237d1bca6e056df5bb16a1216a434634109478f882d3b1d58344c801d184f95d

SHA512
195b98245bb820085ae9203cdb6d470b749d1f228908093e8606453b027b7d7681ccd7952e30c2f5dd40f8f0b999ccfc60ebb03419b574c08de6816e75710d2c

Download Submit
memory/836-22-0x0000000000B80000-0x00000000012CB000-memory.dmp

Filesize
7.3MB

Download
memory/836-24-0x00007FFBB6E90000-0x00007FFBB7085000-memory.dmp

Filesize
2.0MB

Download
memory/836-25-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/836-37-0x0000000000B80000-0x00000000012CB000-memory.dmp

Filesize
7.3MB

Download
memory/1376-0-0x00007FFB97C60000-0x00007FFB97DD2000-memory.dmp

Filesize
1.4MB

Download
memory/1376-11-0x00007FFB97C78000-0x00007FFB97C79000-memory.dmp

Filesize
4KB

Download
memory/1376-12-0x00007FFB97C60000-0x00007FFB97DD2000-memory.dmp

Filesize
1.4MB

Download
memory/1376-13-0x00007FFB97C60000-0x00007FFB97DD2000-memory.dmp

Filesize
1.4MB

Download
memory/1876-16-0x00007FFBB6E90000-0x00007FFBB7085000-memory.dmp

Filesize
2.0MB

Download

Analysis

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