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 4 IoCs

stealer

Processes:

resource	yara_rule
behavioral3/memory/4964-23-0x0000000000DA0000-0x00000000014EB000-memory.dmp	family_vidar_v7
behavioral3/memory/4964-24-0x0000000000DA0000-0x00000000014EB000-memory.dmp	family_vidar_v7
behavioral3/memory/4964-37-0x0000000000DA0000-0x00000000014EB000-memory.dmp	family_vidar_v7
behavioral3/memory/4964-38-0x0000000000DA0000-0x00000000014EB000-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
Loads dropped DLL 1 IoCs

Processes:

coml.au3

pid process

4964 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 1796 set thread context of 1728 1796 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

1528 timeout.exe
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

Setup.exenetsh.execoml.au3

pid process

1796 Setup.exe
1796 Setup.exe
1728 netsh.exe
1728 netsh.exe
4964 coml.au3
4964 coml.au3
Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

Setup.exenetsh.exe

pid process

1796 Setup.exe
1728 netsh.exe

pid	process
4964	coml.au3

description	pid	process	target process
PID 1796 set thread context of 1728	1796	Setup.exe	netsh.exe

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

pid	process
1528	timeout.exe

pid	process
1796	Setup.exe
1796	Setup.exe
1728	netsh.exe
1728	netsh.exe
4964	coml.au3
4964	coml.au3

pid	process
1796	Setup.exe
1728	netsh.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

Setup.exenetsh.execoml.au3cmd.exe

description	pid	process	target process
PID 1796 wrote to memory of 1728	1796	Setup.exe	netsh.exe
PID 1796 wrote to memory of 1728	1796	Setup.exe	netsh.exe
PID 1796 wrote to memory of 1728	1796	Setup.exe	netsh.exe
PID 1796 wrote to memory of 1728	1796	Setup.exe	netsh.exe
PID 1728 wrote to memory of 4964	1728	netsh.exe	coml.au3
PID 1728 wrote to memory of 4964	1728	netsh.exe	coml.au3
PID 1728 wrote to memory of 4964	1728	netsh.exe	coml.au3
PID 1728 wrote to memory of 4964	1728	netsh.exe	coml.au3
PID 1728 wrote to memory of 4964	1728	netsh.exe	coml.au3
PID 4964 wrote to memory of 580	4964	coml.au3	cmd.exe
PID 4964 wrote to memory of 580	4964	coml.au3	cmd.exe
PID 4964 wrote to memory of 580	4964	coml.au3	cmd.exe
PID 580 wrote to memory of 1528	580	cmd.exe	timeout.exe
PID 580 wrote to memory of 1528	580	cmd.exe	timeout.exe
PID 580 wrote to memory of 1528	580	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:1796

C:\Windows\SysWOW64\netsh.exe
C:\Windows\SysWOW64\netsh.exe
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1728

C:\Users\Admin\AppData\Local\Temp\coml.au3
C:\Users\Admin\AppData\Local\Temp\coml.au3
3⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4964

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\HIEHDHCFIJDB" & exit
4⤵
- Suspicious use of WriteProcessMemory
PID:580

C:\Windows\SysWOW64\timeout.exe
timeout /t 10
5⤵
- Delays execution with timeout.exe
PID:1528

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

2

T1012

System Information Discovery

2

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\9d7449ae
Filesize
6.8MB

MD5
2708cb67b99a6b12b853e39e421556bc

SHA1
8a90ad5b905ca79efe43caf61073006ec76e8134

SHA256
08b68b861ba087f1e409a93c4d05bb32de599dccca1d578270d294d384b10772

SHA512
b664a2e8ec7168d94b23d356a18373e819befeabe2a885f47b23d1f2c768c2f955359f7b75d2f3a72aba56be95f62fb8aa71a1fbc77e5626abbb8b54e90a6aa5

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

MD5
c56b5f0201a3b3de53e561fe76912bfd

SHA1
2a4062e10a5de813f5688221dbeb3f3ff33eb417

SHA256
237d1bca6e056df5bb16a1216a434634109478f882d3b1d58344c801d184f95d

SHA512
195b98245bb820085ae9203cdb6d470b749d1f228908093e8606453b027b7d7681ccd7952e30c2f5dd40f8f0b999ccfc60ebb03419b574c08de6816e75710d2c

Download Submit
memory/1728-16-0x00007FFEFB1C0000-0x00007FFEFB3C9000-memory.dmp

Filesize
2.0MB

Download
memory/1796-13-0x00007FFED9B40000-0x00007FFED9CBA000-memory.dmp

Filesize
1.5MB

Download
memory/1796-0-0x00007FFED9B40000-0x00007FFED9CBA000-memory.dmp

Filesize
1.5MB

Download
memory/1796-12-0x00007FFED9B40000-0x00007FFED9CBA000-memory.dmp

Filesize
1.5MB

Download
memory/1796-11-0x00007FFED9B58000-0x00007FFED9B59000-memory.dmp

Filesize
4KB

Download
memory/4964-22-0x00007FFEFB1C0000-0x00007FFEFB3C9000-memory.dmp

Filesize
2.0MB

Download
memory/4964-23-0x0000000000DA0000-0x00000000014EB000-memory.dmp

Filesize
7.3MB

Download
memory/4964-24-0x0000000000DA0000-0x00000000014EB000-memory.dmp

Filesize
7.3MB

Download
memory/4964-25-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/4964-37-0x0000000000DA0000-0x00000000014EB000-memory.dmp

Filesize
7.3MB

Download
memory/4964-38-0x0000000000DA0000-0x00000000014EB000-memory.dmp

Filesize
7.3MB

Download

Analysis

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