nloader | 89b7f39fb7a0c7742e90a19bd5c6bbae275b48b6de9f0a1e120ba5b6615263ab

Resubmissions

15-04-2021 10:33

210415-nks94tqah6 10

15-04-2021 10:24

210415-rbfwnlhcz6 10

Analysis

max time kernel
150s
max time network
140s
platform
windows10_x64
resource
win10v20210408
submitted
15-04-2021 10:24

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Fattura.xlsb
Size

249KB
MD5

6099fd6bb0b51b4eaeb02f7169a2b072
SHA1

179e6c3a18f9ead886f22c0df2b383e9161662dd
SHA256

89b7f39fb7a0c7742e90a19bd5c6bbae275b48b6de9f0a1e120ba5b6615263ab
SHA512

e2ba30f2ea42cc1985c87887bb1bc2dd39e39243619c31df5194c36ab451740dd1e446717fd85b6c9419ba611224813f7dc40c37838131daf6a498c4585e8b68

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	1308	852	cmd.exe	67

Nloader Payload 1 IoCs

resource	yara_rule
behavioral2/memory/3544-186-0x0000000000400000-0x00000000004AE000-memory.dmp	nloader

Blocklisted process makes network request 1 IoCs

flow	pid	Process
30	3544	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
3544	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 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\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
852	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
852	EXCEL.EXE
852	EXCEL.EXE
852	EXCEL.EXE
852	EXCEL.EXE
852	EXCEL.EXE
852	EXCEL.EXE
852	EXCEL.EXE
852	EXCEL.EXE
852	EXCEL.EXE
852	EXCEL.EXE
852	EXCEL.EXE
852	EXCEL.EXE

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 852 wrote to memory of 1308	852	EXCEL.EXE	80
PID 852 wrote to memory of 1308	852	EXCEL.EXE	80
PID 1308 wrote to memory of 1676	1308	cmd.exe	82
PID 1308 wrote to memory of 1676	1308	cmd.exe	82
PID 1308 wrote to memory of 2232	1308	cmd.exe	83
PID 1308 wrote to memory of 2232	1308	cmd.exe	83
PID 2232 wrote to memory of 3544	2232	rundll32.exe	84
PID 2232 wrote to memory of 3544	2232	rundll32.exe	84
PID 2232 wrote to memory of 3544	2232	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\Fattura.xlsb"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:852
- 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:1308
- - C:\Windows\system32\certutil.exe
    certutil -decode C:\Users\Public\130486.dot C:\Users\Public\130486.pgj
    3⤵
    PID:1676
- - C:\Windows\system32\rundll32.exe
    rundll32 C:\Users\Public\130486.pgj,DF1
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2232
  - - C:\Windows\SysWOW64\rundll32.exe
      rundll32 C:\Users\Public\130486.pgj,DF1
      4⤵
      Blocklisted process makes network request
      Loads dropped DLL
      PID:3544

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/852-118-0x00007FFD2ADC0000-0x00007FFD2ADD0000-memory.dmp

Filesize
64KB

Download
memory/852-114-0x00007FF629660000-0x00007FF62CC16000-memory.dmp

Filesize
53.7MB

Download
memory/852-121-0x00007FFD2ADC0000-0x00007FFD2ADD0000-memory.dmp

Filesize
64KB

Download
memory/852-122-0x00007FFD4B780000-0x00007FFD4C86E000-memory.dmp

Filesize
16.9MB

Download
memory/852-123-0x00007FFD49880000-0x00007FFD4B775000-memory.dmp

Filesize
31.0MB

Download
memory/852-117-0x00007FFD2ADC0000-0x00007FFD2ADD0000-memory.dmp

Filesize
64KB

Download
memory/852-116-0x00007FFD2ADC0000-0x00007FFD2ADD0000-memory.dmp

Filesize
64KB

Download
memory/852-115-0x00007FFD2ADC0000-0x00007FFD2ADD0000-memory.dmp

Filesize
64KB

Download
memory/3544-186-0x0000000000400000-0x00000000004AE000-memory.dmp

Filesize
696KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads