stealc | 12ca25e6461fd5a1178fdc0a4b23cfa88225dec174fbd48ff6587a50b24d5a38

Analysis

max time kernel
62s
max time network
51s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
15-06-2024 19:52

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General

Target

#)#NEw_SetUp_33778_P@$$Key#(#/New-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 3 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/1840-22-0x0000000000F10000-0x000000000165B000-memory.dmp	family_vidar_v7
behavioral2/memory/1840-25-0x0000000000F10000-0x000000000165B000-memory.dmp	family_vidar_v7
behavioral2/memory/1840-39-0x0000000000F10000-0x000000000165B000-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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation coml.au3
Loads dropped DLL 1 IoCs

Processes:

coml.au3

pid process

1840 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:

New-Setup.exe

description pid process target process

PID 4748 set thread context of 4480 4748 New-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

916 timeout.exe
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

New-Setup.exenetsh.execoml.au3

pid process

4748 New-Setup.exe
4748 New-Setup.exe
4480 netsh.exe
4480 netsh.exe
1840 coml.au3
1840 coml.au3
Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

New-Setup.exenetsh.exe

pid process

4748 New-Setup.exe
4480 netsh.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	coml.au3

pid	process
1840	coml.au3

description	pid	process	target process
PID 4748 set thread context of 4480	4748	New-Setup.exe	netsh.exe

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

pid	process
916	timeout.exe

pid	process
4748	New-Setup.exe
4748	New-Setup.exe
4480	netsh.exe
4480	netsh.exe
1840	coml.au3
1840	coml.au3

pid	process
4748	New-Setup.exe
4480	netsh.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

New-Setup.exenetsh.execoml.au3cmd.exe

description	pid	process	target process
PID 4748 wrote to memory of 4480	4748	New-Setup.exe	netsh.exe
PID 4748 wrote to memory of 4480	4748	New-Setup.exe	netsh.exe
PID 4748 wrote to memory of 4480	4748	New-Setup.exe	netsh.exe
PID 4748 wrote to memory of 4480	4748	New-Setup.exe	netsh.exe
PID 4480 wrote to memory of 1840	4480	netsh.exe	coml.au3
PID 4480 wrote to memory of 1840	4480	netsh.exe	coml.au3
PID 4480 wrote to memory of 1840	4480	netsh.exe	coml.au3
PID 4480 wrote to memory of 1840	4480	netsh.exe	coml.au3
PID 4480 wrote to memory of 1840	4480	netsh.exe	coml.au3
PID 1840 wrote to memory of 1900	1840	coml.au3	cmd.exe
PID 1840 wrote to memory of 1900	1840	coml.au3	cmd.exe
PID 1840 wrote to memory of 1900	1840	coml.au3	cmd.exe
PID 1900 wrote to memory of 916	1900	cmd.exe	timeout.exe
PID 1900 wrote to memory of 916	1900	cmd.exe	timeout.exe
PID 1900 wrote to memory of 916	1900	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\#)#NEw_SetUp_33778_P@$$Key#(#\New-Setup.exe
"C:\Users\Admin\AppData\Local\Temp\#)#NEw_SetUp_33778_P@$$Key#(#\New-Setup.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4748

C:\Windows\SysWOW64\netsh.exe
C:\Windows\SysWOW64\netsh.exe
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4480

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:1840

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\CBFIIEHJDBKJ" & exit
4⤵
- Suspicious use of WriteProcessMemory
PID:1900

C:\Windows\SysWOW64\timeout.exe
timeout /t 10
5⤵
- Delays execution with timeout.exe
PID:916

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\a376575e
Filesize
6.8MB

MD5
1f6deb4d9928646729400482f1f015a1

SHA1
1ebe7d1dc4309a6d35dc9f6fcf41e50379bba110

SHA256
4d74175b08b7c35fd66e7e05e5070f788d20b9f5a0a7c1c11593a8b2e22140a4

SHA512
641fed5c87512c8786431ab7df98acae3eb0558aae6d9520cb258f32e1bc7269eccb6bff743741b7c085318474dc06dcd3f89d50a7c9d5d65f542a0b491fc430

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

MD5
c56b5f0201a3b3de53e561fe76912bfd

SHA1
2a4062e10a5de813f5688221dbeb3f3ff33eb417

SHA256
237d1bca6e056df5bb16a1216a434634109478f882d3b1d58344c801d184f95d

SHA512
195b98245bb820085ae9203cdb6d470b749d1f228908093e8606453b027b7d7681ccd7952e30c2f5dd40f8f0b999ccfc60ebb03419b574c08de6816e75710d2c

Download Submit
memory/1840-22-0x0000000000F10000-0x000000000165B000-memory.dmp

Filesize
7.3MB

Download
memory/1840-24-0x00007FF85F970000-0x00007FF85FB65000-memory.dmp

Filesize
2.0MB

Download
memory/1840-25-0x0000000000F10000-0x000000000165B000-memory.dmp

Filesize
7.3MB

Download
memory/1840-27-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/1840-39-0x0000000000F10000-0x000000000165B000-memory.dmp

Filesize
7.3MB

Download
memory/4480-16-0x00007FF85F970000-0x00007FF85FB65000-memory.dmp

Filesize
2.0MB

Download
memory/4748-0-0x00007FF840840000-0x00007FF8409B2000-memory.dmp

Filesize
1.4MB

Download
memory/4748-11-0x00007FF840858000-0x00007FF840859000-memory.dmp

Filesize
4KB

Download
memory/4748-12-0x00007FF840840000-0x00007FF8409B2000-memory.dmp

Filesize
1.4MB

Download
memory/4748-13-0x00007FF840840000-0x00007FF8409B2000-memory.dmp

Filesize
1.4MB

Download