60610dee4927e907b5a6a4ac49f8c921fa8af7005b2e8deb2b26ffcc1cac6322

General

Target
60610dee4927e907b5a6a4ac49f8c921fa8af7005b2e8deb2b26ffcc1cac6322.xlsm
Size 83KB
Sample220112-23129aeeck
SHA256 60610dee4927e907b5a6a4ac49f8c921fa8af7005b2e8deb2b26ffcc1cac6322
MD5 044c399cb95459d89ce15247a7f4fb0b
SHA1 0621fb8e28e870a5b13229a2a18758ce306c9896
SHA512 9362ecf9910eceb607f82d3af4e176b4dc51c9164904456ca4083a8a7140ac3c585bc021938bc12bfbce8d648992e3c0693d53a09bdda9d37536c65b4ec34233
MD5 SHA1 SHA512

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

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.

description	pid	pid_target	Process	procid_target
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3420	400	rundll32.exe	68

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
3420	rundll32.exe
1648	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Mjnnhwz\pdwvsqr.nos	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	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
400	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
400	EXCEL.EXE
400	EXCEL.EXE
400	EXCEL.EXE
400	EXCEL.EXE
400	EXCEL.EXE
400	EXCEL.EXE
400	EXCEL.EXE
400	EXCEL.EXE
400	EXCEL.EXE
400	EXCEL.EXE
400	EXCEL.EXE
400	EXCEL.EXE

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 400 wrote to memory of 3420	400	EXCEL.EXE	72
PID 400 wrote to memory of 3420	400	EXCEL.EXE	72
PID 400 wrote to memory of 3420	400	EXCEL.EXE	72
PID 3420 wrote to memory of 1648	3420	rundll32.exe	73
PID 3420 wrote to memory of 1648	3420	rundll32.exe	73
PID 3420 wrote to memory of 1648	3420	rundll32.exe	73
PID 1648 wrote to memory of 2604	1648	rundll32.exe	76
PID 1648 wrote to memory of 2604	1648	rundll32.exe	76
PID 1648 wrote to memory of 2604	1648	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\60610dee4927e907b5a6a4ac49f8c921fa8af7005b2e8deb2b26ffcc1cac6322.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:400
- C:\Windows\SysWow64\rundll32.exe
  C:\Windows\SysWow64\rundll32.exe ..\dwa.ocx,D"&"l"&"lR"&"egister"&"Server
  2⤵
  - Process spawned unexpected child process
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:3420
- - C:\Windows\SysWOW64\rundll32.exe
    C:\Windows\SysWOW64\rundll32.exe "C:\Users\Admin\dwa.ocx",DllRegisterServer
    3⤵
    - Loads dropped DLL
    - Drops file in System32 directory
    - Suspicious use of WriteProcessMemory
    PID:1648
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Mjnnhwz\pdwvsqr.nos",XMkEHojCPQUDm
      4⤵
      PID:2604

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/400-120-0x000001CC2F450000-0x000001CC2F452000-memory.dmp

Download

memory/400-115-0x00007FF86FB00000-0x00007FF86FB10000-memory.dmp

Download

memory/400-119-0x000001CC2F450000-0x000001CC2F452000-memory.dmp

Download

memory/400-121-0x00007FF86FB00000-0x00007FF86FB10000-memory.dmp

Download

memory/400-122-0x000001CC2F450000-0x000001CC2F452000-memory.dmp

Download

memory/400-118-0x00007FF86FB00000-0x00007FF86FB10000-memory.dmp

Download

memory/400-117-0x00007FF86FB00000-0x00007FF86FB10000-memory.dmp

Download

memory/400-116-0x00007FF86FB00000-0x00007FF86FB10000-memory.dmp

Download

memory/1648-275-0x0000000002A10000-0x0000000002B5A000-memory.dmp

Download

memory/3420-272-0x0000000002A40000-0x0000000002A69000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads