58c5a48579e8499ec3aa409ee960a020592e422516e0aaa2847880ca43f84e90

General

Target
9a472978cc338dd13256023b764c5d82.xls
Size 118KB
Sample220112-fbpdgsbbd4
SHA256 58c5a48579e8499ec3aa409ee960a020592e422516e0aaa2847880ca43f84e90
MD5 9a472978cc338dd13256023b764c5d82
SHA1 919ef9b2a8370c4c406216c76ac243d670f08a1e
SHA512 2f75af5ead631ea47ed9c77eedefa7f21cf284f24b461d5a3a95553edf2328e9ea6f42dbf1dac0e0facf66e390471882804d9920d400bfccebf5375ce86fa0e3
MD5 SHA1 SHA512

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper
http://www.cuneytkocas.com/wp-content/VSnofpES1wO2CcVob/
xlm40.dropper
http://towardsun.net/admin/BYGGkrYAnT/

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	2004	2056	rundll32.exe	68

Blocklisted process makes network request 1 IoCs

flow	pid	Process
49	4076	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
2004	rundll32.exe
3112	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Xmuojsd\eipokralsnlwxl.szb	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
2056	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4076	rundll32.exe
4076	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2056	EXCEL.EXE
2056	EXCEL.EXE
2056	EXCEL.EXE
2056	EXCEL.EXE
2056	EXCEL.EXE
2056	EXCEL.EXE
2056	EXCEL.EXE
2056	EXCEL.EXE
2056	EXCEL.EXE
2056	EXCEL.EXE
2056	EXCEL.EXE
2056	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2056 wrote to memory of 2004	2056	EXCEL.EXE	72
PID 2056 wrote to memory of 2004	2056	EXCEL.EXE	72
PID 2056 wrote to memory of 2004	2056	EXCEL.EXE	72
PID 2004 wrote to memory of 3112	2004	rundll32.exe	73
PID 2004 wrote to memory of 3112	2004	rundll32.exe	73
PID 2004 wrote to memory of 3112	2004	rundll32.exe	73
PID 3112 wrote to memory of 3416	3112	rundll32.exe	74
PID 3112 wrote to memory of 3416	3112	rundll32.exe	74
PID 3112 wrote to memory of 3416	3112	rundll32.exe	74
PID 3416 wrote to memory of 4076	3416	rundll32.exe	75
PID 3416 wrote to memory of 4076	3416	rundll32.exe	75
PID 3416 wrote to memory of 4076	3416	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\9a472978cc338dd13256023b764c5d82.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2056
- 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:2004
- - 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:3112
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Xmuojsd\eipokralsnlwxl.szb",TDsJPNt
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3416
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Xmuojsd\eipokralsnlwxl.szb",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:4076

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/2056-118-0x00007FF989EC0000-0x00007FF989ED0000-memory.dmp

Download

memory/2056-120-0x00000194048A0000-0x00000194048A2000-memory.dmp

Download

memory/2056-121-0x00007FF989EC0000-0x00007FF989ED0000-memory.dmp

Download

memory/2056-122-0x00000194048A0000-0x00000194048A2000-memory.dmp

Download

memory/2056-119-0x00000194048A0000-0x00000194048A2000-memory.dmp

Download

memory/2056-115-0x00007FF989EC0000-0x00007FF989ED0000-memory.dmp

Download

memory/2056-117-0x00007FF989EC0000-0x00007FF989ED0000-memory.dmp

Download

memory/2056-116-0x00007FF989EC0000-0x00007FF989ED0000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads