Overview
overview
10Static
static
1casarowtt
windows7-x64
1casarowtt
windows10-2004-x64
1custsat.dll
windows7-x64
1custsat.dll
windows10-2004-x64
1dsssdvreeed55
windows7-x64
1dsssdvreeed55
windows10-2004-x64
1msvcr80.dll
windows7-x64
9msvcr80.dll
windows10-2004-x64
9windows.exe
windows7-x64
10windows.exe
windows10-2004-x64
10Analysis
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max time kernel
153s -
max time network
95s -
platform
windows7_x64 -
resource
win7-20230220-en -
resource tags
arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system -
submitted
14-03-2023 13:16
Static task
static1
Behavioral task
behavioral1
Sample
casarowtt
Resource
win7-20230220-en
Behavioral task
behavioral2
Sample
casarowtt
Resource
win10v2004-20230220-en
Behavioral task
behavioral3
Sample
custsat.dll
Resource
win7-20230220-en
Behavioral task
behavioral4
Sample
custsat.dll
Resource
win10v2004-20230220-en
Behavioral task
behavioral5
Sample
dsssdvreeed55
Resource
win7-20230220-en
Behavioral task
behavioral6
Sample
dsssdvreeed55
Resource
win10v2004-20230220-en
Behavioral task
behavioral7
Sample
msvcr80.dll
Resource
win7-20230220-en
Behavioral task
behavioral8
Sample
msvcr80.dll
Resource
win10v2004-20230220-en
Behavioral task
behavioral9
Sample
windows.exe
Resource
win7-20230220-en
Behavioral task
behavioral10
Sample
windows.exe
Resource
win10v2004-20230220-en
General
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Target
windows.exe
-
Size
213KB
-
MD5
7fb1c5dfc2605843cec69a6fc4e96576
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SHA1
b5e591d23a3798b89648033760d3710a403b32be
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SHA256
330c1d3dd702af11b01ae38ced101e4c4217816e4887e9ebffe2e529cdc857d5
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SHA512
0c62d01a97d01044a7f4083f2cf6a0e18397bc50cc9f0847bf6da2f604d1d89cd3010d005785077aca2d8249f870f2817a6b4d845235cda55ac5519aee5dc1b7
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SSDEEP
6144:QPF/ZUebo8fKrnfc6cU2btV0h7FusG/oImYM:IF/ZzRoImYM
Malware Config
Signatures
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Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
Processes:
windows.exedescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ windows.exe -
Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
Processes:
windows.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion windows.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion windows.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
windows.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Windows\CurrentVersion\Run\DgaiuacE = "C:\\Users\\Admin\\AppData\\Local\\Temp\\windows.exe" windows.exe Key created \REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Windows\CurrentVersion\Run windows.exe -
Processes:
windows.exedescription ioc process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA windows.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
Processes:
windows.exepid process 1584 windows.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Script User-Agent 2 IoCs
Uses user-agent string associated with script host/environment.
Processes:
description flow ioc HTTP User-Agent header 1 Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5) HTTP User-Agent header 4 Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5) -
Suspicious behavior: EnumeratesProcesses 64 IoCs
Processes:
windows.exepid process 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe 1584 windows.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
Processes:
windows.exepid process 1584 windows.exe 1584 windows.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\windows.exe"C:\Users\Admin\AppData\Local\Temp\windows.exe"1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Adds Run key to start application
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
PID:1584