35101e24e0d9b97edc46d35011a21e505ee4b05036998544ad3dad3444e09376

General

Target

35101e24e0d9b97edc46d35011a21e505ee4b05036998544ad3dad3444e09376.xlsm
Size

83KB
MD5

ff818ce9aa787f15cda72ec89a7efe74
SHA1

f9f16f7ba8fde9898e685973e0e9293599442f28
SHA256

35101e24e0d9b97edc46d35011a21e505ee4b05036998544ad3dad3444e09376
SHA512

ad5ba5618fe7493da7061b06902ae408460aaae1544521e5b1db23d861cd787cb5c14e06a2d6dafac2b05aaab22b9e8850b0e5d312de54f535dbd082abefd80c

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://www.crownpacificpartners.com/guglio/Rt4el/

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	2448	2656	rundll32.exe	67

Blocklisted process makes network request 3 IoCs

flow	pid	Process
36	2284	rundll32.exe
37	2284	rundll32.exe
38	2284	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
2448	rundll32.exe
2892	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Gwsyvp\ssqa.lvu	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\SystemSKU	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2656	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2284	rundll32.exe
2284	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2656	EXCEL.EXE
2656	EXCEL.EXE
2656	EXCEL.EXE
2656	EXCEL.EXE
2656	EXCEL.EXE
2656	EXCEL.EXE
2656	EXCEL.EXE
2656	EXCEL.EXE
2656	EXCEL.EXE
2656	EXCEL.EXE
2656	EXCEL.EXE
2656	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2656 wrote to memory of 2448	2656	EXCEL.EXE	71
PID 2656 wrote to memory of 2448	2656	EXCEL.EXE	71
PID 2656 wrote to memory of 2448	2656	EXCEL.EXE	71
PID 2448 wrote to memory of 2892	2448	rundll32.exe	72
PID 2448 wrote to memory of 2892	2448	rundll32.exe	72
PID 2448 wrote to memory of 2892	2448	rundll32.exe	72
PID 2892 wrote to memory of 3848	2892	rundll32.exe	73
PID 2892 wrote to memory of 3848	2892	rundll32.exe	73
PID 2892 wrote to memory of 3848	2892	rundll32.exe	73
PID 3848 wrote to memory of 2284	3848	rundll32.exe	74
PID 3848 wrote to memory of 2284	3848	rundll32.exe	74
PID 3848 wrote to memory of 2284	3848	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\35101e24e0d9b97edc46d35011a21e505ee4b05036998544ad3dad3444e09376.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2656
- C:\Windows\SysWow64\rundll32.exe
  C:\Windows\SysWow64\rundll32.exe ..\erum.ocx,D"&"l"&"lR"&"egister"&"Serve"&"r
  2⤵
  - Process spawned unexpected child process
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2448
- - C:\Windows\SysWOW64\rundll32.exe
    C:\Windows\SysWOW64\rundll32.exe "C:\Users\Admin\erum.ocx",DllRegisterServer
    3⤵
    - Loads dropped DLL
    - Drops file in System32 directory
    - Suspicious use of WriteProcessMemory
    PID:2892
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Gwsyvp\ssqa.lvu",uVsPTylhSWYP
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3848
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Gwsyvp\ssqa.lvu",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:2284

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/2656-119-0x000001F3DA6C0000-0x000001F3DA6C2000-memory.dmp

Filesize
8KB

Download
memory/2656-121-0x00007FF893410000-0x00007FF893420000-memory.dmp

Filesize
64KB

Download
memory/2656-122-0x000001F3DA6C0000-0x000001F3DA6C2000-memory.dmp

Filesize
8KB

Download
memory/2656-128-0x00007FF88FA70000-0x00007FF88FA80000-memory.dmp

Filesize
64KB

Download
memory/2656-129-0x00007FF88FA70000-0x00007FF88FA80000-memory.dmp

Filesize
64KB

Download
memory/2656-120-0x000001F3DA6C0000-0x000001F3DA6C2000-memory.dmp

Filesize
8KB

Download
memory/2656-115-0x00007FF893410000-0x00007FF893420000-memory.dmp

Filesize
64KB

Download
memory/2656-118-0x00007FF893410000-0x00007FF893420000-memory.dmp

Filesize
64KB

Download
memory/2656-117-0x00007FF893410000-0x00007FF893420000-memory.dmp

Filesize
64KB

Download
memory/2656-116-0x00007FF893410000-0x00007FF893420000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads