b94a04d3a5f75fb0370e59e96488c49848647fd60e1b9ef2a9e898ff5b53f6ca

General

Target
vp_1818.xlsm
Size 83KB
Sample220112-xcw86adfcn
SHA256 b94a04d3a5f75fb0370e59e96488c49848647fd60e1b9ef2a9e898ff5b53f6ca
MD5 646411bd0013639293ab60e664f3d195
SHA1 ed7c9101e85bba6fef1d9a4e43def76fdf604b3c
SHA512 a092d0c3b0945d291f06c2dac22c4421c25ff9fac63d69c353d2d2b1813b4ce6ff3fcbb175143535e43fa36ac4239bf3332ebe0f735bf188c67804e3b6fb5049
MD5 SHA1 SHA512

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper
http://www.be-pu.com/4.hana/Y1XWpb1zWMRD/

Signatures

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

description	pid	pid_target	Process	procid_target
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2492	1016	rundll32.exe	68

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
2492	rundll32.exe
520	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Hoafp\twvcfenrtuh.fzu	rundll32.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1016	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
1016	EXCEL.EXE
1016	EXCEL.EXE
1016	EXCEL.EXE
1016	EXCEL.EXE
1016	EXCEL.EXE
1016	EXCEL.EXE
1016	EXCEL.EXE
1016	EXCEL.EXE
1016	EXCEL.EXE
1016	EXCEL.EXE
1016	EXCEL.EXE
1016	EXCEL.EXE

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1016 wrote to memory of 2492	1016	EXCEL.EXE	72
PID 1016 wrote to memory of 2492	1016	EXCEL.EXE	72
PID 1016 wrote to memory of 2492	1016	EXCEL.EXE	72
PID 2492 wrote to memory of 520	2492	rundll32.exe	75
PID 2492 wrote to memory of 520	2492	rundll32.exe	75
PID 2492 wrote to memory of 520	2492	rundll32.exe	75
PID 520 wrote to memory of 2824	520	rundll32.exe	76
PID 520 wrote to memory of 2824	520	rundll32.exe	76
PID 520 wrote to memory of 2824	520	rundll32.exe	76

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\vp_1818.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1016
- C:\Windows\SysWow64\rundll32.exe
  C:\Windows\SysWow64\rundll32.exe ..\adi.ocx,D"&"l"&"lR"&"egister"&"Serve"&"r
  2⤵
  - Process spawned unexpected child process
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2492
- - C:\Windows\SysWOW64\rundll32.exe
    C:\Windows\SysWOW64\rundll32.exe "C:\Users\Admin\adi.ocx",DllRegisterServer
    3⤵
    - Loads dropped DLL
    - Drops file in System32 directory
    - Suspicious use of WriteProcessMemory
    PID:520
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Hoafp\twvcfenrtuh.fzu",sQhk
      4⤵
      PID:2824

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/520-272-0x00000000025A0000-0x00000000025C9000-memory.dmp

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memory/1016-122-0x00007FF8C87C0000-0x00007FF8C87D0000-memory.dmp

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memory/1016-124-0x000001A2725A0000-0x000001A2725A2000-memory.dmp

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memory/1016-125-0x000001A2725A0000-0x000001A2725A2000-memory.dmp

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memory/1016-131-0x00007FF8C4EA0000-0x00007FF8C4EB0000-memory.dmp

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memory/1016-132-0x00007FF8C4EA0000-0x00007FF8C4EB0000-memory.dmp

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memory/1016-123-0x000001A2725A0000-0x000001A2725A2000-memory.dmp

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memory/1016-118-0x00007FF8C87C0000-0x00007FF8C87D0000-memory.dmp

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memory/1016-121-0x00007FF8C87C0000-0x00007FF8C87D0000-memory.dmp

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memory/1016-120-0x00007FF8C87C0000-0x00007FF8C87D0000-memory.dmp

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memory/1016-119-0x00007FF8C87C0000-0x00007FF8C87D0000-memory.dmp

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memory/2492-271-0x0000000002DF0000-0x0000000002E19000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads