e7065618e785e98792d570656fd412ecf695c45ec5a8123d04cf4ee302d225bf

General

Target
69701651bb9f3fa79939add57b80af9b.xls
Size 118KB
Sample220111-1mlrysheb7
SHA256 e7065618e785e98792d570656fd412ecf695c45ec5a8123d04cf4ee302d225bf
MD5 69701651bb9f3fa79939add57b80af9b
SHA1 cd51b80a9bffd89c91958c4b3d8a307b4c96509e
SHA512 3fbe44f9e7706e6d18504bbf4a8f1e9d8b5ab7b75c9855dff87175efa20796be30ad954ecddfe5fe494956393195979f1016c2f16f6cd1a8dd143cb631f04a08
MD5 SHA1 SHA512

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper
http://www.cuneytkocas.com/wp-content/VSnofpES1wO2CcVob/

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	4968	3712	rundll32.exe	67

Blocklisted process makes network request 2 IoCs

flow	pid	Process
42	4996	rundll32.exe
43	4996	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
4968	rundll32.exe
2984	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Wrpcjovzfgwxmmz\xtmdmxrmstvfx.dzj	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
3712	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4996	rundll32.exe
4996	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
3712	EXCEL.EXE
3712	EXCEL.EXE
3712	EXCEL.EXE
3712	EXCEL.EXE
3712	EXCEL.EXE
3712	EXCEL.EXE
3712	EXCEL.EXE
3712	EXCEL.EXE
3712	EXCEL.EXE
3712	EXCEL.EXE
3712	EXCEL.EXE
3712	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3712 wrote to memory of 4968	3712	EXCEL.EXE	71
PID 3712 wrote to memory of 4968	3712	EXCEL.EXE	71
PID 3712 wrote to memory of 4968	3712	EXCEL.EXE	71
PID 4968 wrote to memory of 2984	4968	rundll32.exe	72
PID 4968 wrote to memory of 2984	4968	rundll32.exe	72
PID 4968 wrote to memory of 2984	4968	rundll32.exe	72
PID 2984 wrote to memory of 4692	2984	rundll32.exe	73
PID 2984 wrote to memory of 4692	2984	rundll32.exe	73
PID 2984 wrote to memory of 4692	2984	rundll32.exe	73
PID 4692 wrote to memory of 4996	4692	rundll32.exe	74
PID 4692 wrote to memory of 4996	4692	rundll32.exe	74
PID 4692 wrote to memory of 4996	4692	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\69701651bb9f3fa79939add57b80af9b.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3712
- 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:4968
- - 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:2984
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Wrpcjovzfgwxmmz\xtmdmxrmstvfx.dzj",lNAMLcyPhMQ
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4692
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Wrpcjovzfgwxmmz\xtmdmxrmstvfx.dzj",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:4996

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/3712-122-0x00007FFE71400000-0x00007FFE71410000-memory.dmp

Download

memory/3712-124-0x0000028535C00000-0x0000028535C02000-memory.dmp

Download

memory/3712-123-0x0000028535C00000-0x0000028535C02000-memory.dmp

Download

memory/3712-125-0x0000028535C00000-0x0000028535C02000-memory.dmp

Download

memory/3712-131-0x00007FFE6D890000-0x00007FFE6D8A0000-memory.dmp

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memory/3712-132-0x00007FFE6D890000-0x00007FFE6D8A0000-memory.dmp

Download

memory/3712-118-0x00007FFE71400000-0x00007FFE71410000-memory.dmp

Download

memory/3712-120-0x00007FFE71400000-0x00007FFE71410000-memory.dmp

Download

memory/3712-121-0x00007FFE71400000-0x00007FFE71410000-memory.dmp

Download

memory/3712-119-0x00007FFE71400000-0x00007FFE71410000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads