1e8ed8d61ad3f66e9acac149db12bf6f3db13cef81cbedc8bf9602c391450c43

General

Target
2c468cb35107e763206cccde6e2f22c7.xls
Size 118KB
Sample220112-e2h4qabah9
SHA256 1e8ed8d61ad3f66e9acac149db12bf6f3db13cef81cbedc8bf9602c391450c43
MD5 2c468cb35107e763206cccde6e2f22c7
SHA1 e0c19feaad8277546fdbac28f984ecdf4dfc80f1
SHA512 4fe52a31ea31c5e4f7a20e9c66a52a6e2953a5856f2b749c587dee6e40c7b50dfa074e42271fd3a5767bb36836080cff98c20f790bdf1c6adc8333505d4d4a29
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	3084	3408	rundll32.exe	68

Blocklisted process makes network request 1 IoCs

flow	pid	Process
46	1968	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
3084	rundll32.exe
4540	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Zvjbqfyjeumy\wjxxqjhlgzjcit.lzx	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
3408	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1968	rundll32.exe
1968	rundll32.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
3408	EXCEL.EXE
3408	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
3408	EXCEL.EXE
3408	EXCEL.EXE
3408	EXCEL.EXE
3408	EXCEL.EXE
3408	EXCEL.EXE
3408	EXCEL.EXE
3408	EXCEL.EXE
3408	EXCEL.EXE
3408	EXCEL.EXE
3408	EXCEL.EXE
3408	EXCEL.EXE
3408	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3408 wrote to memory of 3084	3408	EXCEL.EXE	71
PID 3408 wrote to memory of 3084	3408	EXCEL.EXE	71
PID 3408 wrote to memory of 3084	3408	EXCEL.EXE	71
PID 3084 wrote to memory of 4540	3084	rundll32.exe	72
PID 3084 wrote to memory of 4540	3084	rundll32.exe	72
PID 3084 wrote to memory of 4540	3084	rundll32.exe	72
PID 4540 wrote to memory of 4976	4540	rundll32.exe	73
PID 4540 wrote to memory of 4976	4540	rundll32.exe	73
PID 4540 wrote to memory of 4976	4540	rundll32.exe	73
PID 4976 wrote to memory of 1968	4976	rundll32.exe	74
PID 4976 wrote to memory of 1968	4976	rundll32.exe	74
PID 4976 wrote to memory of 1968	4976	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\2c468cb35107e763206cccde6e2f22c7.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3408
- 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:3084
- - 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:4540
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Zvjbqfyjeumy\wjxxqjhlgzjcit.lzx",OEKGRVTXZoUfB
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4976
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Zvjbqfyjeumy\wjxxqjhlgzjcit.lzx",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:1968

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/3408-118-0x00007FFE0CBA0000-0x00007FFE0CBB0000-memory.dmp

Download

memory/3408-121-0x0000021DD7FE0000-0x0000021DD7FE2000-memory.dmp

Download

memory/3408-123-0x00007FFE0CBA0000-0x00007FFE0CBB0000-memory.dmp

Download

memory/3408-120-0x0000021DD7FE0000-0x0000021DD7FE2000-memory.dmp

Download

memory/3408-119-0x0000021DD7FE0000-0x0000021DD7FE2000-memory.dmp

Download

memory/3408-115-0x00007FFE0CBA0000-0x00007FFE0CBB0000-memory.dmp

Download

memory/3408-117-0x00007FFE0CBA0000-0x00007FFE0CBB0000-memory.dmp

Download

memory/3408-116-0x00007FFE0CBA0000-0x00007FFE0CBB0000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads