429e0de91bc404f5fc886f0618177f5bc49fe0da3940e98426c5d5cd8aed57cf

General

Target
366bf432386f459c480ecf6b82cdc433.xls
Size 113KB
Sample220111-3eve8saaa9
SHA256 429e0de91bc404f5fc886f0618177f5bc49fe0da3940e98426c5d5cd8aed57cf
MD5 366bf432386f459c480ecf6b82cdc433
SHA1 bea1e1af96d34d03cfb9c441361519449a55a222
SHA512 f3be01fb9193f83c153fb0ddde87a0757bc6a60957d7ccde3a51808c273a547da0cb6d456fee7e0d478217f570407e55c00804dd31226969d7d5f8e7b83c13b9
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	840	1008	rundll32.exe	68

Blocklisted process makes network request 1 IoCs

flow	pid	Process
41	3132	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
840	rundll32.exe
1688	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Kiykwfjwg\qwewrfwxq.txv	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1008	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3132	rundll32.exe
3132	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
1008	EXCEL.EXE
1008	EXCEL.EXE
1008	EXCEL.EXE
1008	EXCEL.EXE
1008	EXCEL.EXE
1008	EXCEL.EXE
1008	EXCEL.EXE
1008	EXCEL.EXE
1008	EXCEL.EXE
1008	EXCEL.EXE
1008	EXCEL.EXE
1008	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1008 wrote to memory of 840	1008	EXCEL.EXE	72
PID 1008 wrote to memory of 840	1008	EXCEL.EXE	72
PID 1008 wrote to memory of 840	1008	EXCEL.EXE	72
PID 840 wrote to memory of 1688	840	rundll32.exe	73
PID 840 wrote to memory of 1688	840	rundll32.exe	73
PID 840 wrote to memory of 1688	840	rundll32.exe	73
PID 1688 wrote to memory of 3852	1688	rundll32.exe	74
PID 1688 wrote to memory of 3852	1688	rundll32.exe	74
PID 1688 wrote to memory of 3852	1688	rundll32.exe	74
PID 3852 wrote to memory of 3132	3852	rundll32.exe	75
PID 3852 wrote to memory of 3132	3852	rundll32.exe	75
PID 3852 wrote to memory of 3132	3852	rundll32.exe	75

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\366bf432386f459c480ecf6b82cdc433.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1008
- 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:840
- - 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:1688
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Kiykwfjwg\qwewrfwxq.txv",hvEKMuNLMJRBWmB
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3852
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Kiykwfjwg\qwewrfwxq.txv",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:3132

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/1008-120-0x0000023005980000-0x0000023005982000-memory.dmp

Download

memory/1008-119-0x0000023005980000-0x0000023005982000-memory.dmp

Download

memory/1008-121-0x00007FF8AEA50000-0x00007FF8AEA60000-memory.dmp

Download

memory/1008-122-0x0000023005980000-0x0000023005982000-memory.dmp

Download

memory/1008-128-0x00007FF8ABF00000-0x00007FF8ABF10000-memory.dmp

Download

memory/1008-129-0x00007FF8ABF00000-0x00007FF8ABF10000-memory.dmp

Download

memory/1008-115-0x00007FF8AEA50000-0x00007FF8AEA60000-memory.dmp

Download

memory/1008-118-0x00007FF8AEA50000-0x00007FF8AEA60000-memory.dmp

Download

memory/1008-117-0x00007FF8AEA50000-0x00007FF8AEA60000-memory.dmp

Download

memory/1008-116-0x00007FF8AEA50000-0x00007FF8AEA60000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads