b5207887a27a42330a6b8e863e0550008a6375de1f4c9c6c0edcc7a9bb6d548f

General

Target
58b606599b6d93a481f9e5185b1c8a69.xls
Size 113KB
Sample220111-3q514saag4
SHA256 b5207887a27a42330a6b8e863e0550008a6375de1f4c9c6c0edcc7a9bb6d548f
MD5 58b606599b6d93a481f9e5185b1c8a69
SHA1 6ffa8499c290b24e942b804e2668a2b4e903e59a
SHA512 fd82735ea087329ec03b4e37015c108f075969b06c76c8c0614ddc7a18f7c2c4089dcdcef51f828a3d9c703f973b395fdcd8f960757b868d3681c9d30a2d431f
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	3664	652	rundll32.exe	68

Blocklisted process makes network request 1 IoCs

flow	pid	Process
42	3288	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
3664	rundll32.exe
1068	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Dmbcafug\uqdluld.vuw	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
652	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3288	rundll32.exe
3288	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
652	EXCEL.EXE
652	EXCEL.EXE
652	EXCEL.EXE
652	EXCEL.EXE
652	EXCEL.EXE
652	EXCEL.EXE
652	EXCEL.EXE
652	EXCEL.EXE
652	EXCEL.EXE
652	EXCEL.EXE
652	EXCEL.EXE
652	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 652 wrote to memory of 3664	652	EXCEL.EXE	71
PID 652 wrote to memory of 3664	652	EXCEL.EXE	71
PID 652 wrote to memory of 3664	652	EXCEL.EXE	71
PID 3664 wrote to memory of 1068	3664	rundll32.exe	72
PID 3664 wrote to memory of 1068	3664	rundll32.exe	72
PID 3664 wrote to memory of 1068	3664	rundll32.exe	72
PID 1068 wrote to memory of 3184	1068	rundll32.exe	73
PID 1068 wrote to memory of 3184	1068	rundll32.exe	73
PID 1068 wrote to memory of 3184	1068	rundll32.exe	73
PID 3184 wrote to memory of 3288	3184	rundll32.exe	74
PID 3184 wrote to memory of 3288	3184	rundll32.exe	74
PID 3184 wrote to memory of 3288	3184	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\58b606599b6d93a481f9e5185b1c8a69.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:652
- 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:3664
- - 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:1068
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Dmbcafug\uqdluld.vuw",qpAYYbAKjKQ
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3184
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Dmbcafug\uqdluld.vuw",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:3288

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/652-119-0x00007FF8AEA50000-0x00007FF8AEA60000-memory.dmp

Download

memory/652-115-0x00007FF8AEA50000-0x00007FF8AEA60000-memory.dmp

Download

memory/652-120-0x000001DB82580000-0x000001DB82582000-memory.dmp

Download

memory/652-121-0x000001DB82580000-0x000001DB82582000-memory.dmp

Download

memory/652-122-0x000001DB82580000-0x000001DB82582000-memory.dmp

Download

memory/652-128-0x00007FF8ABF00000-0x00007FF8ABF10000-memory.dmp

Download

memory/652-129-0x00007FF8ABF00000-0x00007FF8ABF10000-memory.dmp

Download

memory/652-116-0x00007FF8AEA50000-0x00007FF8AEA60000-memory.dmp

Download

memory/652-118-0x00007FF8AEA50000-0x00007FF8AEA60000-memory.dmp

Download

memory/652-117-0x00007FF8AEA50000-0x00007FF8AEA60000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads