a8085602b4f2d9fa12e7cdc848185b57baef023cbe353df862fac4ff279cf3f4

General

Target
0de69cf47b1668419d80574923ec5bfd.xls
Size 118KB
Sample220111-p8nmwsffg3
SHA256 a8085602b4f2d9fa12e7cdc848185b57baef023cbe353df862fac4ff279cf3f4
MD5 0de69cf47b1668419d80574923ec5bfd
SHA1 330da16ce1030f790e7af69597c437e836a27660
SHA512 dbfd6fd13d957e7ae1f1cd161c085be7551b8de5a217664b44cdbe9150cc3aa7e9711cf86ad97613d7f3dd6dd9e7dc36d9062891da5f5b60b035491fa031d097
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	1772	2372	rundll32.exe	67

Blocklisted process makes network request 2 IoCs

flow	pid	Process
45	3792	rundll32.exe
46	3792	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
1772	rundll32.exe
1468	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Fnrzpsg\vyftjnftatnvd.lze	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
2372	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3792	rundll32.exe
3792	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2372	EXCEL.EXE
2372	EXCEL.EXE
2372	EXCEL.EXE
2372	EXCEL.EXE
2372	EXCEL.EXE
2372	EXCEL.EXE
2372	EXCEL.EXE
2372	EXCEL.EXE
2372	EXCEL.EXE
2372	EXCEL.EXE
2372	EXCEL.EXE
2372	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2372 wrote to memory of 1772	2372	EXCEL.EXE	71
PID 2372 wrote to memory of 1772	2372	EXCEL.EXE	71
PID 2372 wrote to memory of 1772	2372	EXCEL.EXE	71
PID 1772 wrote to memory of 1468	1772	rundll32.exe	72
PID 1772 wrote to memory of 1468	1772	rundll32.exe	72
PID 1772 wrote to memory of 1468	1772	rundll32.exe	72
PID 1468 wrote to memory of 2180	1468	rundll32.exe	73
PID 1468 wrote to memory of 2180	1468	rundll32.exe	73
PID 1468 wrote to memory of 2180	1468	rundll32.exe	73
PID 2180 wrote to memory of 3792	2180	rundll32.exe	74
PID 2180 wrote to memory of 3792	2180	rundll32.exe	74
PID 2180 wrote to memory of 3792	2180	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\0de69cf47b1668419d80574923ec5bfd.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2372
- 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:1772
- - 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:1468
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Fnrzpsg\vyftjnftatnvd.lze",ounbJRU
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2180
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Fnrzpsg\vyftjnftatnvd.lze",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:3792

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/2372-120-0x0000019098AC0000-0x0000019098AC2000-memory.dmp

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memory/2372-127-0x00007FFDC85C0000-0x00007FFDC85D0000-memory.dmp

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memory/2372-128-0x00007FFDCB810000-0x00007FFDCB820000-memory.dmp

Download

memory/2372-129-0x00007FFDC85C0000-0x00007FFDC85D0000-memory.dmp

Download

memory/2372-121-0x0000019098AC0000-0x0000019098AC2000-memory.dmp

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memory/2372-119-0x0000019098AC0000-0x0000019098AC2000-memory.dmp

Download

memory/2372-115-0x00007FFDCB810000-0x00007FFDCB820000-memory.dmp

Download

memory/2372-118-0x00007FFDCB810000-0x00007FFDCB820000-memory.dmp

Download

memory/2372-117-0x00007FFDCB810000-0x00007FFDCB820000-memory.dmp

Download

memory/2372-116-0x00007FFDCB810000-0x00007FFDCB820000-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