a0a6e55d2714273e7c3866776a187cc320e9bfa5086632fc12ed94db2efbfc3d

General

Target
2e73d9e1fd4480e56d4f458ed2857158.xls
Size 118KB
Sample220111-x5376sghd2
SHA256 a0a6e55d2714273e7c3866776a187cc320e9bfa5086632fc12ed94db2efbfc3d
MD5 2e73d9e1fd4480e56d4f458ed2857158
SHA1 e3b03664b27ba208d51f9868e705db0e29a1470f
SHA512 3f021fb8427faf0d403da44569cb0df4ceafff673a9ae7973986d5bb7c6cba61d339a06d5846771b83c8aacfd2850fe1329e2741b4e8fbf62478b4aa4d4d8d8e
MD5 SHA1 SHA512

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper
https://wordpressdes.vanzolini-gte.org.br/fundacaotelefonica.org.br/gAbC4QpJYI/

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	1464	2836	rundll32.exe	67

Blocklisted process makes network request 2 IoCs

flow	pid	Process
42	2848	rundll32.exe
44	2848	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
1464	rundll32.exe
1120	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Aiwalwqubtdq\klpjrsg.vnx	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
2836	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2848	rundll32.exe
2848	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2836	EXCEL.EXE
2836	EXCEL.EXE
2836	EXCEL.EXE
2836	EXCEL.EXE
2836	EXCEL.EXE
2836	EXCEL.EXE
2836	EXCEL.EXE
2836	EXCEL.EXE
2836	EXCEL.EXE
2836	EXCEL.EXE
2836	EXCEL.EXE
2836	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2836 wrote to memory of 1464	2836	EXCEL.EXE	71
PID 2836 wrote to memory of 1464	2836	EXCEL.EXE	71
PID 2836 wrote to memory of 1464	2836	EXCEL.EXE	71
PID 1464 wrote to memory of 1120	1464	rundll32.exe	72
PID 1464 wrote to memory of 1120	1464	rundll32.exe	72
PID 1464 wrote to memory of 1120	1464	rundll32.exe	72
PID 1120 wrote to memory of 1440	1120	rundll32.exe	73
PID 1120 wrote to memory of 1440	1120	rundll32.exe	73
PID 1120 wrote to memory of 1440	1120	rundll32.exe	73
PID 1440 wrote to memory of 2848	1440	rundll32.exe	74
PID 1440 wrote to memory of 2848	1440	rundll32.exe	74
PID 1440 wrote to memory of 2848	1440	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\2e73d9e1fd4480e56d4f458ed2857158.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2836
- 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:1464
- - 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:1120
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Aiwalwqubtdq\klpjrsg.vnx",OPHiVMbkvwPFV
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1440
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Aiwalwqubtdq\klpjrsg.vnx",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:2848

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

Replay Monitor

Loading Replay Monitor...

Downloads

memory/2836-119-0x00007FF7E4E20000-0x00007FF7E4E30000-memory.dmp

Download

memory/2836-122-0x0000017A3FF20000-0x0000017A3FF22000-memory.dmp

Download

memory/2836-128-0x00007FF7E1700000-0x00007FF7E1710000-memory.dmp

Download

memory/2836-129-0x00007FF7E1700000-0x00007FF7E1710000-memory.dmp

Download

memory/2836-121-0x0000017A3FF20000-0x0000017A3FF22000-memory.dmp

Download

memory/2836-120-0x0000017A3FF20000-0x0000017A3FF22000-memory.dmp

Download

memory/2836-115-0x00007FF7E4E20000-0x00007FF7E4E30000-memory.dmp

Download

memory/2836-118-0x00007FF7E4E20000-0x00007FF7E4E30000-memory.dmp

Download

memory/2836-117-0x00007FF7E4E20000-0x00007FF7E4E30000-memory.dmp

Download

memory/2836-116-0x00007FF7E4E20000-0x00007FF7E4E30000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads