Analysis
- max time kernel
149s - max time network
127s - platform
windows10_x64 - resource
win10-en-20211208 - submitted
13/01/2022, 03:40
General
- Target SecuriteInfo.com.Trojan.Skarlet.3.Gen.19861.5168.xlsm
- Size 83KB
- Sample220113-d78qwsfeh9
- SHA256 e19c4cdeb5c2e9417e8976342dcf2494d337be7e4f6be1f465e9eacf998a6d5d
Malware Config
Extracted
-
xlm4.0
-
xlm40.dropper
http://yuanbinglun.com/www.yuanbinglun.com/7kKwqmxRWQK0OLi/
-
xlm40.dropper
http://laserjetprintersreview.xyz/wp-includes/BJ6yUJ/
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
-
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.19861.5168.xlsm"1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
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
-
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
-
C:\Windows\SysWOW64\rundll32.exeC:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Cugyrpcy\abfyqqnp.edb",tfvPxJwTODBSi4⤵
-
-
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
memory/1132-273-0x0000000000E90000-0x0000000000EB9000-memory.dmp
memory/1548-274-0x0000000000C00000-0x0000000000CAE000-memory.dmp
memory/2520-122-0x00007FF7E0830000-0x00007FF7E0840000-memory.dmp
memory/2520-124-0x00000241334C0000-0x00000241334C2000-memory.dmp
memory/2520-123-0x00000241334C0000-0x00000241334C2000-memory.dmp
memory/2520-125-0x00000241334C0000-0x00000241334C2000-memory.dmp
memory/2520-118-0x00007FF7E0830000-0x00007FF7E0840000-memory.dmp
memory/2520-121-0x00007FF7E0830000-0x00007FF7E0840000-memory.dmp
memory/2520-120-0x00007FF7E0830000-0x00007FF7E0840000-memory.dmp
memory/2520-119-0x00007FF7E0830000-0x00007FF7E0840000-memory.dmp