cab722a553d0e662a2c4e18e2300d30338fa957f7b0ade2c8f4450bd375bb8f9

General

Target
ee7aa9ec1324fc273b0abd257ca5cbaa.xls
Size 118KB
Sample220111-razzdafhb4
SHA256 cab722a553d0e662a2c4e18e2300d30338fa957f7b0ade2c8f4450bd375bb8f9
MD5 ee7aa9ec1324fc273b0abd257ca5cbaa
SHA1 7c0c08cb6366851d6a4015b7da86576112b42b0a
SHA512 86a905aee1d76c125a5659df957f4473ac4ca6fb5da9d2749f55f1bf7ff47f65699e7d621de2f5f9b5b1eaaf511d8599ad03fb9c5be01ff43306be3a024562b0
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	1456	3932	rundll32.exe	68

Blocklisted process makes network request 1 IoCs

flow	pid	Process
44	660	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
1456	rundll32.exe
1764	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Gayzpbjfetasfnxf\oqmlvshcaaudumg.rzg	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\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	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
3932	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
660	rundll32.exe
660	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
3932	EXCEL.EXE
3932	EXCEL.EXE
3932	EXCEL.EXE
3932	EXCEL.EXE
3932	EXCEL.EXE
3932	EXCEL.EXE
3932	EXCEL.EXE
3932	EXCEL.EXE
3932	EXCEL.EXE
3932	EXCEL.EXE
3932	EXCEL.EXE
3932	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3932 wrote to memory of 1456	3932	EXCEL.EXE	71
PID 3932 wrote to memory of 1456	3932	EXCEL.EXE	71
PID 3932 wrote to memory of 1456	3932	EXCEL.EXE	71
PID 1456 wrote to memory of 1764	1456	rundll32.exe	72
PID 1456 wrote to memory of 1764	1456	rundll32.exe	72
PID 1456 wrote to memory of 1764	1456	rundll32.exe	72
PID 1764 wrote to memory of 1640	1764	rundll32.exe	73
PID 1764 wrote to memory of 1640	1764	rundll32.exe	73
PID 1764 wrote to memory of 1640	1764	rundll32.exe	73
PID 1640 wrote to memory of 660	1640	rundll32.exe	74
PID 1640 wrote to memory of 660	1640	rundll32.exe	74
PID 1640 wrote to memory of 660	1640	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\ee7aa9ec1324fc273b0abd257ca5cbaa.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3932
- 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:1456
- - 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:1764
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Gayzpbjfetasfnxf\oqmlvshcaaudumg.rzg",QEkfrad
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1640
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Gayzpbjfetasfnxf\oqmlvshcaaudumg.rzg",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:660

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/3932-122-0x000001F617D70000-0x000001F617D72000-memory.dmp

Download

memory/3932-131-0x00007FF86F1F0000-0x00007FF86F200000-memory.dmp

Download

memory/3932-132-0x00007FF86F1F0000-0x00007FF86F200000-memory.dmp

Download

memory/3932-148-0x000001F617D70000-0x000001F617D72000-memory.dmp

Download

memory/3932-125-0x000001F617D70000-0x000001F617D72000-memory.dmp

Download

memory/3932-124-0x00007FF8726E0000-0x00007FF8726F0000-memory.dmp

Download

memory/3932-123-0x000001F617D70000-0x000001F617D72000-memory.dmp

Download

memory/3932-118-0x00007FF8726E0000-0x00007FF8726F0000-memory.dmp

Download

memory/3932-121-0x00007FF8726E0000-0x00007FF8726F0000-memory.dmp

Download

memory/3932-120-0x00007FF8726E0000-0x00007FF8726F0000-memory.dmp

Download

memory/3932-119-0x00007FF8726E0000-0x00007FF8726F0000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads