15808d5cf09ee4a60ed9e18d0b403cd762cbf7613246e2cdfa6fba88eb654dd8

General

Target
def724e2d8b7be9f31a034df71ae2e84.xls
Size 113KB
Sample220111-17cpsahff3
SHA256 15808d5cf09ee4a60ed9e18d0b403cd762cbf7613246e2cdfa6fba88eb654dd8
MD5 def724e2d8b7be9f31a034df71ae2e84
SHA1 9a86336cb15e83cc7d6523cd9025bbc6b0bbe961
SHA512 f0ecf2ea80143ec1fdf7a5e5b99d64777a2b37c703f90eb33129e3f78ad6e55f3717d8de0209eabec63fa0cc9a094cfce09a0a3b9a05ac6f80003a62178cfacd
MD5 SHA1 SHA512

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper
http://ordinateur.ogivart.us/editor/Qpo7OAOnbe/

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	2180	368	rundll32.exe	68

Blocklisted process makes network request 1 IoCs

flow	pid	Process
43	1732	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
2180	rundll32.exe
3792	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Opiwixwhmbjz\tmzldrpjonup.azt	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
368	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1732	rundll32.exe
1732	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
368	EXCEL.EXE
368	EXCEL.EXE
368	EXCEL.EXE
368	EXCEL.EXE
368	EXCEL.EXE
368	EXCEL.EXE
368	EXCEL.EXE
368	EXCEL.EXE
368	EXCEL.EXE
368	EXCEL.EXE
368	EXCEL.EXE
368	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 368 wrote to memory of 2180	368	EXCEL.EXE	71
PID 368 wrote to memory of 2180	368	EXCEL.EXE	71
PID 368 wrote to memory of 2180	368	EXCEL.EXE	71
PID 2180 wrote to memory of 3792	2180	rundll32.exe	72
PID 2180 wrote to memory of 3792	2180	rundll32.exe	72
PID 2180 wrote to memory of 3792	2180	rundll32.exe	72
PID 3792 wrote to memory of 824	3792	rundll32.exe	73
PID 3792 wrote to memory of 824	3792	rundll32.exe	73
PID 3792 wrote to memory of 824	3792	rundll32.exe	73
PID 824 wrote to memory of 1732	824	rundll32.exe	74
PID 824 wrote to memory of 1732	824	rundll32.exe	74
PID 824 wrote to memory of 1732	824	rundll32.exe	74

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\def724e2d8b7be9f31a034df71ae2e84.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:368
- C:\Windows\SysWow64\rundll32.exe
  C:\Windows\SysWow64\rundll32.exe ..\sun.ocx,D"&"l"&"lR"&"egister"&"Serve"&"r
  2⤵
  - Process spawned unexpected child process
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2180
- - C:\Windows\SysWOW64\rundll32.exe
    C:\Windows\SysWOW64\rundll32.exe "C:\Users\Admin\sun.ocx",DllRegisterServer
    3⤵
    - Loads dropped DLL
    - Drops file in System32 directory
    - Suspicious use of WriteProcessMemory
    PID:3792
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Opiwixwhmbjz\tmzldrpjonup.azt",BYkDyKiGGStRMB
      4⤵
      Suspicious use of WriteProcessMemory
      PID:824
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Opiwixwhmbjz\tmzldrpjonup.azt",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:1732

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

Replay Monitor

Loading Replay Monitor...

Downloads

memory/368-121-0x00007FFF65860000-0x00007FFF65870000-memory.dmp

Download

memory/368-122-0x000001696CEA0000-0x000001696CEA2000-memory.dmp

Download

memory/368-123-0x000001696CEA0000-0x000001696CEA2000-memory.dmp

Download

memory/368-124-0x00007FFF65860000-0x00007FFF65870000-memory.dmp

Download

memory/368-125-0x000001696CEA0000-0x000001696CEA2000-memory.dmp

Download

memory/368-118-0x00007FFF65860000-0x00007FFF65870000-memory.dmp

Download

memory/368-120-0x00007FFF65860000-0x00007FFF65870000-memory.dmp

Download

memory/368-119-0x00007FFF65860000-0x00007FFF65870000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads