2c8664d029f07581d91dfdf94de270580b998fbf62b88287101aab42304156b4

General

Target
0e61523bcabaf4aaf0dc4e17b00058c2.xls
Size 118KB
Sample220112-dk69jsage8
SHA256 2c8664d029f07581d91dfdf94de270580b998fbf62b88287101aab42304156b4
MD5 0e61523bcabaf4aaf0dc4e17b00058c2
SHA1 208768b375bd8a41edddc01861ad60fe569d55aa
SHA512 c1d19ad2e37f4532bb25a9e4be837bd8457bca59df57933c95c5e4d5c1627183aaab65b1cc72fd6b1d14f386dd7e540b5c356acbda801d5c5484adc1bca09f8c
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/
xlm40.dropper
http://k-antiques.jp/wp-includes/SCYdA6TLohYk2/

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	4900	3364	rundll32.exe	67

Blocklisted process makes network request 2 IoCs

flow	pid	Process
41	4576	rundll32.exe
43	4576	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
4900	rundll32.exe
1952	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Voptqsq\ivwznraqfzmmcjk.wxm	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
3364	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4576	rundll32.exe
4576	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
3364	EXCEL.EXE
3364	EXCEL.EXE
3364	EXCEL.EXE
3364	EXCEL.EXE
3364	EXCEL.EXE
3364	EXCEL.EXE
3364	EXCEL.EXE
3364	EXCEL.EXE
3364	EXCEL.EXE
3364	EXCEL.EXE
3364	EXCEL.EXE
3364	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3364 wrote to memory of 4900	3364	EXCEL.EXE	71
PID 3364 wrote to memory of 4900	3364	EXCEL.EXE	71
PID 3364 wrote to memory of 4900	3364	EXCEL.EXE	71
PID 4900 wrote to memory of 1952	4900	rundll32.exe	72
PID 4900 wrote to memory of 1952	4900	rundll32.exe	72
PID 4900 wrote to memory of 1952	4900	rundll32.exe	72
PID 1952 wrote to memory of 3784	1952	rundll32.exe	73
PID 1952 wrote to memory of 3784	1952	rundll32.exe	73
PID 1952 wrote to memory of 3784	1952	rundll32.exe	73
PID 3784 wrote to memory of 4576	3784	rundll32.exe	74
PID 3784 wrote to memory of 4576	3784	rundll32.exe	74
PID 3784 wrote to memory of 4576	3784	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\0e61523bcabaf4aaf0dc4e17b00058c2.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3364
- 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:4900
- - 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:1952
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Voptqsq\ivwznraqfzmmcjk.wxm",BdSsPq
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3784
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Voptqsq\ivwznraqfzmmcjk.wxm",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:4576

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/3364-119-0x000001F3AC180000-0x000001F3AC182000-memory.dmp

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memory/3364-120-0x000001F3AC180000-0x000001F3AC182000-memory.dmp

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memory/3364-122-0x000001F3AC180000-0x000001F3AC182000-memory.dmp

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memory/3364-121-0x00007FFBBFC80000-0x00007FFBBFC90000-memory.dmp

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memory/3364-128-0x00007FFBBD0D0000-0x00007FFBBD0E0000-memory.dmp

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memory/3364-129-0x00007FFBBD0D0000-0x00007FFBBD0E0000-memory.dmp

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memory/3364-115-0x00007FFBBFC80000-0x00007FFBBFC90000-memory.dmp

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memory/3364-118-0x00007FFBBFC80000-0x00007FFBBFC90000-memory.dmp

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memory/3364-117-0x00007FFBBFC80000-0x00007FFBBFC90000-memory.dmp

Download

memory/3364-116-0x00007FFBBFC80000-0x00007FFBBFC90000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads