Analysis
- max time kernel
149s - max time network
146s - platform
windows10_x64 - resource
win10-en-20211208 - submitted
12/01/2022, 23:55
General
- Target SecuriteInfo.com.Trojan.Skarlet.3.Gen.6698.23595.xlsm
- Size 83KB
- Sample220112-3yffesefg8
- SHA256 af2883e71c1c33d15944d4bdd9bfe7f027a2f50299f203642ecdc906cedf3b2e
Malware Config
Extracted
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xlm4.0
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xlm40.dropper
http://yuanbinglun.com/www.yuanbinglun.com/7kKwqmxRWQK0OLi/
Signatures
- Process spawned unexpected child process 1 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
- Downloads MZ/PE file
- 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\SecuriteInfo.com.Trojan.Skarlet.3.Gen.6698.23595.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 ..\dwa.ocx,D"&"l"&"lR"&"egister"&"Server2⤵
- 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\dwa.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\Avnjg\shecvucvrj.pih",wCEHDTLgs4⤵
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
memory/2328-264-0x0000000000640000-0x0000000000669000-memory.dmp
memory/2800-120-0x000002C48FCA0000-0x000002C48FCA2000-memory.dmp
memory/2800-121-0x00007FFCB13B0000-0x00007FFCB13C0000-memory.dmp
memory/2800-122-0x000002C48FCA0000-0x000002C48FCA2000-memory.dmp
memory/2800-115-0x00007FFCB13B0000-0x00007FFCB13C0000-memory.dmp
memory/2800-119-0x000002C48FCA0000-0x000002C48FCA2000-memory.dmp
memory/2800-118-0x00007FFCB13B0000-0x00007FFCB13C0000-memory.dmp
memory/2800-117-0x00007FFCB13B0000-0x00007FFCB13C0000-memory.dmp
memory/2800-116-0x00007FFCB13B0000-0x00007FFCB13C0000-memory.dmp
memory/2932-265-0x0000000000D50000-0x0000000000D79000-memory.dmp