7dcde20dd26c5388d734d658830ebb48bf5c1170cf9ec39a3e084d8e728715e8

General

Target

1c2c9ed8859bf774c091debcdb228795.xls
Size

118KB
MD5

1c2c9ed8859bf774c091debcdb228795
SHA1

c4440f6be0a350228488ccc079783176d3383d04
SHA256

7dcde20dd26c5388d734d658830ebb48bf5c1170cf9ec39a3e084d8e728715e8
SHA512

a064ca499ae09cb45a8c590d88cb65fc7d38a2ca9bc7c53c7c8cc2f58a79e09480d2a51d3eac32941d9f2028dbba8274a58dfd04987de4417c2653d42ed8df79

Score

10^/10

suricata

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	64	4092	rundll32.exe	68

suricata: ET MALWARE W32/Emotet CnC Beacon 3
suricata: ET MALWARE W32/Emotet CnC Beacon 3
suricata

Blocklisted process makes network request 1 IoCs

flow	pid	Process
44	1536	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
64	rundll32.exe
3736	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Zmzcrrdidw\wbtneiaarf.skl	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
4092	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1536	rundll32.exe
1536	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
4092	EXCEL.EXE
4092	EXCEL.EXE
4092	EXCEL.EXE
4092	EXCEL.EXE
4092	EXCEL.EXE
4092	EXCEL.EXE
4092	EXCEL.EXE
4092	EXCEL.EXE
4092	EXCEL.EXE
4092	EXCEL.EXE
4092	EXCEL.EXE
4092	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4092 wrote to memory of 64	4092	EXCEL.EXE	71
PID 4092 wrote to memory of 64	4092	EXCEL.EXE	71
PID 4092 wrote to memory of 64	4092	EXCEL.EXE	71
PID 64 wrote to memory of 3736	64	rundll32.exe	72
PID 64 wrote to memory of 3736	64	rundll32.exe	72
PID 64 wrote to memory of 3736	64	rundll32.exe	72
PID 3736 wrote to memory of 3220	3736	rundll32.exe	73
PID 3736 wrote to memory of 3220	3736	rundll32.exe	73
PID 3736 wrote to memory of 3220	3736	rundll32.exe	73
PID 3220 wrote to memory of 1536	3220	rundll32.exe	74
PID 3220 wrote to memory of 1536	3220	rundll32.exe	74
PID 3220 wrote to memory of 1536	3220	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\1c2c9ed8859bf774c091debcdb228795.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4092
- 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:64
- - 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:3736
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Zmzcrrdidw\wbtneiaarf.skl",JMeuQIpnwSqHaI
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3220
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Zmzcrrdidw\wbtneiaarf.skl",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:1536

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/4092-118-0x00007FF969B20000-0x00007FF969B30000-memory.dmp

Filesize
64KB

Download
memory/4092-127-0x00007FF969B20000-0x00007FF969B30000-memory.dmp

Filesize
64KB

Download
memory/4092-121-0x00000199854F0000-0x00000199854F2000-memory.dmp

Filesize
8KB

Download
memory/4092-119-0x00000199854F0000-0x00000199854F2000-memory.dmp

Filesize
8KB

Download
memory/4092-120-0x00000199854F0000-0x00000199854F2000-memory.dmp

Filesize
8KB

Download
memory/4092-115-0x00007FF969B20000-0x00007FF969B30000-memory.dmp

Filesize
64KB

Download
memory/4092-117-0x00007FF969B20000-0x00007FF969B30000-memory.dmp

Filesize
64KB

Download
memory/4092-116-0x00007FF969B20000-0x00007FF969B30000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads