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.

Processes:

cmd.exe

description	pid	pid_target	process	target process
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3708	3152	cmd.exe	EXCEL.EXE

Nloader Payload 1 IoCs

Processes:

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

Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

3888 rundll32.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1676 3888 WerFault.exe rundll32.exe

pid	process
3888	rundll32.exe

pid	pid_target	process	target process
1676	3888	WerFault.exe	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

Processes:

EXCEL.EXE

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

Processes:

EXCEL.EXE

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

Processes:

EXCEL.EXE

pid process

3152 EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 15 IoCs

Processes:

WerFault.exe

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

Processes:

WerFault.exe

description pid process

Token: SeRestorePrivilege 1676 WerFault.exe
Token: SeBackupPrivilege 1676 WerFault.exe
Token: SeDebugPrivilege 1676 WerFault.exe

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

Suspicious use of SetWindowsHookEx 22 IoCs

Processes:

EXCEL.EXE

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

Processes:

EXCEL.EXEcmd.exerundll32.exe

description	pid	process	target process
PID 3152 wrote to memory of 3708	3152	EXCEL.EXE	cmd.exe
PID 3152 wrote to memory of 3708	3152	EXCEL.EXE	cmd.exe
PID 3708 wrote to memory of 1116	3708	cmd.exe	certutil.exe
PID 3708 wrote to memory of 1116	3708	cmd.exe	certutil.exe
PID 3708 wrote to memory of 3900	3708	cmd.exe	rundll32.exe
PID 3708 wrote to memory of 3900	3708	cmd.exe	rundll32.exe
PID 3900 wrote to memory of 3888	3900	rundll32.exe	rundll32.exe
PID 3900 wrote to memory of 3888	3900	rundll32.exe	rundll32.exe
PID 3900 wrote to memory of 3888	3900	rundll32.exe	rundll32.exe

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

C:\Users\Public\130486.dot

MD5
5ad4845793b5dc3308172b39f3c3dbc7

SHA1
4285a93ec1a49f28cb2542af2a2bafc08e4f8a18

SHA256
2632c0cc222a6d436b50a418605a7bd4fa8f363ab8d93d10b831cdb28a2ac1bc

SHA512
4a1c88eb99d9d9713802f5f2c9b96d15bb4cab8af7360c62d3e1b614fe07ea33771b33075c15a0f400daad7a713edc684e2c0566cd9ab5805b00f05e3b58a5df

Download Submit
C:\Users\Public\130486.pgj

MD5
14089c2d5a4207dd80f71fb258200848

SHA1
80fa3d47f321108d7c956680ac1b1f5c611d6277

SHA256
f3b5cf1e40aed4567a8996cf107285907d432b4bc8cc3d0b46aae628813d82d4

SHA512
cbfcbcddb80749711853aa7d39525e299015d31451615cfce64e54f197d6a1e87deb60920723c7a90b30c0da05e469c4208a758e93ad2e49f9e78eefb231bfa6

Download Submit
\Users\Public\130486.pgj

MD5
14089c2d5a4207dd80f71fb258200848

SHA1
80fa3d47f321108d7c956680ac1b1f5c611d6277

SHA256
f3b5cf1e40aed4567a8996cf107285907d432b4bc8cc3d0b46aae628813d82d4

SHA512
cbfcbcddb80749711853aa7d39525e299015d31451615cfce64e54f197d6a1e87deb60920723c7a90b30c0da05e469c4208a758e93ad2e49f9e78eefb231bfa6

Download Submit
memory/1116-180-0x0000000000000000-mapping.dmp

Download
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/3708-179-0x0000000000000000-mapping.dmp

Download
memory/3888-184-0x0000000000000000-mapping.dmp

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

Filesize
24KB

Download
memory/3900-182-0x0000000000000000-mapping.dmp

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads