Analysis
- max time kernel
150s - max time network
129s - platform
windows10_x64 - resource
win10-en-20211208 - submitted
12/01/2022, 14:18
General
- Target PGY5300582.xlsm
- Size 84KB
- Sample220112-rl99gschcn
- SHA256 5ecda7dff2d530c8ae471e0f5f0e8716d6930dfce93f4e7c7ac8f6249250d6fa
Malware Config
Extracted
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xlm4.0
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xlm40.dropper
http://insertcatherreview.xyz/wp-includes/o23k5ted/
Signatures
- Process spawned unexpected child process 1 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
- Loads dropped DLL 2 IoCs
- Drops file in System32 directory 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
- Enumerates system info in registry 2 TTPs 3 IoCs
- Suspicious behavior: AddClipboardFormatListener 1 IoCs
- Suspicious use of SetWindowsHookEx 12 IoCs
- Suspicious use of WriteProcessMemory 9 IoCs
Processes
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C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\PGY5300582.xlsm"1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWow64\rundll32.exeC:\Windows\SysWow64\rundll32.exe ..\adi.ocx,D"&"l"&"lR"&"egister"&"Serve"&"r2⤵
- Process spawned unexpected child process
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exeC:\Windows\SysWOW64\rundll32.exe "C:\Users\Admin\adi.ocx",DllRegisterServer3⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exeC:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Jxanuypacllqfauj\aisjhz.yso",fyJXUE4⤵
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
memory/2900-266-0x0000000002A20000-0x0000000002A49000-memory.dmp
memory/3348-120-0x0000026210B10000-0x0000026210B12000-memory.dmp
memory/3348-121-0x0000026210B10000-0x0000026210B12000-memory.dmp
memory/3348-127-0x00007FF893410000-0x00007FF893420000-memory.dmp
memory/3348-115-0x00007FF893410000-0x00007FF893420000-memory.dmp
memory/3348-119-0x0000026210B10000-0x0000026210B12000-memory.dmp
memory/3348-118-0x00007FF893410000-0x00007FF893420000-memory.dmp
memory/3348-117-0x00007FF893410000-0x00007FF893420000-memory.dmp
memory/3348-116-0x00007FF893410000-0x00007FF893420000-memory.dmp
memory/3836-267-0x0000000003230000-0x000000000337A000-memory.dmp