nloader | db53f42e13d2685bd34dbc5c79fad637c9344e72e210ca05504420874e98c2a6

General

Target

test.xlsb
Size

254KB
MD5

dc37192b5c4c8c4f94c73c18ce5e3829
SHA1

0aa6bb11a11dade2269d90b2781ed0a517362012
SHA256

db53f42e13d2685bd34dbc5c79fad637c9344e72e210ca05504420874e98c2a6
SHA512

3e8b179d8521fb33a46eeeca74bbda7a4e8a32f47b6195b17d62664dd2e31716261a61a495857ed08dbbc001a9eab8adec7133921179eb3df66c53e18c586d9a

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	3708	3152	cmd.exe	68

Nloader Payload 1 IoCs

resource	yara_rule
behavioral2/memory/3888-186-0x00000000049F0000-0x00000000049F6000-memory.dmp	nloader

Loads dropped DLL 1 IoCs

pid	Process
3888	rundll32.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1676	3888	WerFault.exe	83

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 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
3152	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 15 IoCs

pid	Process
1676	WerFault.exe
1676	WerFault.exe
1676	WerFault.exe
1676	WerFault.exe
1676	WerFault.exe
1676	WerFault.exe
1676	WerFault.exe
1676	WerFault.exe
1676	WerFault.exe
1676	WerFault.exe
1676	WerFault.exe
1676	WerFault.exe
1676	WerFault.exe
1676	WerFault.exe
1676	WerFault.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeRestorePrivilege	1676	WerFault.exe
Token: SeBackupPrivilege	1676	WerFault.exe
Token: SeDebugPrivilege	1676	WerFault.exe

Suspicious use of SetWindowsHookEx 22 IoCs

pid	Process
3152	EXCEL.EXE
3152	EXCEL.EXE
3152	EXCEL.EXE
3152	EXCEL.EXE
3152	EXCEL.EXE
3152	EXCEL.EXE
3152	EXCEL.EXE
3152	EXCEL.EXE
3152	EXCEL.EXE
3152	EXCEL.EXE
3152	EXCEL.EXE
3152	EXCEL.EXE
3152	EXCEL.EXE
3152	EXCEL.EXE
3152	EXCEL.EXE
3152	EXCEL.EXE
3152	EXCEL.EXE
3152	EXCEL.EXE
3152	EXCEL.EXE
3152	EXCEL.EXE
3152	EXCEL.EXE
3152	EXCEL.EXE

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3152 wrote to memory of 3708	3152	EXCEL.EXE	80
PID 3152 wrote to memory of 3708	3152	EXCEL.EXE	80
PID 3708 wrote to memory of 1116	3708	cmd.exe	81
PID 3708 wrote to memory of 1116	3708	cmd.exe	81
PID 3708 wrote to memory of 3900	3708	cmd.exe	82
PID 3708 wrote to memory of 3900	3708	cmd.exe	82
PID 3900 wrote to memory of 3888	3900	rundll32.exe	83
PID 3900 wrote to memory of 3888	3900	rundll32.exe	83
PID 3900 wrote to memory of 3888	3900	rundll32.exe	83

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\test.xlsb"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3152
- 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:3708
- - C:\Windows\system32\certutil.exe
    certutil -decode C:\Users\Public\130486.dot C:\Users\Public\130486.pgj
    3⤵
    PID:1116
- - C:\Windows\system32\rundll32.exe
    rundll32 C:\Users\Public\130486.pgj,DF1
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3900
  - - C:\Windows\SysWOW64\rundll32.exe
      rundll32 C:\Users\Public\130486.pgj,DF1
      4⤵
      Loads dropped DLL
      PID:3888
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3888 -s 880
        5⤵
        Program crash
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1676

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/3152-118-0x00007FFD35790000-0x00007FFD357A0000-memory.dmp

Filesize
64KB

Download
memory/3152-122-0x00007FFD35790000-0x00007FFD357A0000-memory.dmp

Filesize
64KB

Download
memory/3152-121-0x00007FFD56060000-0x00007FFD5714E000-memory.dmp

Filesize
16.9MB

Download
memory/3152-123-0x00007FFD54160000-0x00007FFD56055000-memory.dmp

Filesize
31.0MB

Download
memory/3152-114-0x00007FF79BEF0000-0x00007FF79F4A6000-memory.dmp

Filesize
53.7MB

Download
memory/3152-117-0x00007FFD35790000-0x00007FFD357A0000-memory.dmp

Filesize
64KB

Download
memory/3152-116-0x00007FFD35790000-0x00007FFD357A0000-memory.dmp

Filesize
64KB

Download
memory/3152-115-0x00007FFD35790000-0x00007FFD357A0000-memory.dmp

Filesize
64KB

Download
memory/3888-186-0x00000000049F0000-0x00000000049F6000-memory.dmp

Filesize
24KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads