nloader | 5c2c97f89704c710ed1638074c98d42c9d1ff1f53e25cdcd3ffd72d231f7480b

General

Target

subscription_1618416583.xlsb
Size

254KB
MD5

664872d6a7739069e1357f0a0c6d7dd2
SHA1

02b1c506e304053d5af55eb7831657eff247067a
SHA256

5c2c97f89704c710ed1638074c98d42c9d1ff1f53e25cdcd3ffd72d231f7480b
SHA512

9c9656373ff41dec29c83ab15140288ea6f473b17c1bfde0cbc2900d7269c63786e09b257a16ad8e6fe7e8ab64eacf8011d5d7b214a18fac3b692d84c98cd65c

Score

10^/10

nloader loader

Malware Config

Signatures

Nloader
Simple loader that includes the keyword 'campo' in the URL used to download other families.
loader nloader

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	3872	3368	cmd.exe	68

Nloader Payload 1 IoCs

resource	yara_rule
behavioral2/memory/2324-186-0x0000000002870000-0x0000000002876000-memory.dmp	nloader

Blocklisted process makes network request 1 IoCs

flow	pid	Process
27	2324	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
2324	rundll32.exe

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
3368	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
3368	EXCEL.EXE
3368	EXCEL.EXE
3368	EXCEL.EXE
3368	EXCEL.EXE
3368	EXCEL.EXE
3368	EXCEL.EXE
3368	EXCEL.EXE
3368	EXCEL.EXE
3368	EXCEL.EXE
3368	EXCEL.EXE
3368	EXCEL.EXE
3368	EXCEL.EXE

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3368 wrote to memory of 3872	3368	EXCEL.EXE	80
PID 3368 wrote to memory of 3872	3368	EXCEL.EXE	80
PID 3872 wrote to memory of 1448	3872	cmd.exe	82
PID 3872 wrote to memory of 1448	3872	cmd.exe	82
PID 3872 wrote to memory of 2548	3872	cmd.exe	83
PID 3872 wrote to memory of 2548	3872	cmd.exe	83
PID 2548 wrote to memory of 2324	2548	rundll32.exe	84
PID 2548 wrote to memory of 2324	2548	rundll32.exe	84
PID 2548 wrote to memory of 2324	2548	rundll32.exe	84

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\subscription_1618416583.xlsb"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3368
- C:\Windows\SYSTEM32\cmd.exe
  cmd.exe /c certutil -decode %PUBLIC%\130486.dot %PUBLIC%\130486.pgj && rundll32 %PUBLIC%\130486.pgj,DF1
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of WriteProcessMemory
  PID:3872
- - C:\Windows\system32\certutil.exe
    certutil -decode C:\Users\Public\130486.dot C:\Users\Public\130486.pgj
    3⤵
    PID:1448
- - C:\Windows\system32\rundll32.exe
    rundll32 C:\Users\Public\130486.pgj,DF1
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2548
  - - C:\Windows\SysWOW64\rundll32.exe
      rundll32 C:\Users\Public\130486.pgj,DF1
      4⤵
      Blocklisted process makes network request
      Loads dropped DLL
      PID:2324

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/2324-186-0x0000000002870000-0x0000000002876000-memory.dmp

Filesize
24KB

Download
memory/3368-118-0x00007FF9A14A0000-0x00007FF9A14B0000-memory.dmp

Filesize
64KB

Download
memory/3368-123-0x00007FF9BFE50000-0x00007FF9C1D45000-memory.dmp

Filesize
31.0MB

Download
memory/3368-121-0x00007FF9C1D50000-0x00007FF9C2E3E000-memory.dmp

Filesize
16.9MB

Download
memory/3368-122-0x00007FF9A14A0000-0x00007FF9A14B0000-memory.dmp

Filesize
64KB

Download
memory/3368-114-0x00007FF7E92B0000-0x00007FF7EC866000-memory.dmp

Filesize
53.7MB

Download
memory/3368-117-0x00007FF9A14A0000-0x00007FF9A14B0000-memory.dmp

Filesize
64KB

Download
memory/3368-116-0x00007FF9A14A0000-0x00007FF9A14B0000-memory.dmp

Filesize
64KB

Download
memory/3368-115-0x00007FF9A14A0000-0x00007FF9A14B0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads