nloader | 5c2c97f89704c710ed1638074c98d42c9d1ff1f53e25cdcd3ffd72d231f7480b

General

Target

subscription_1618416583.xlsb
Size

254KB
MD5

664872d6a7739069e1357f0a0c6d7dd2
SHA1

02b1c506e304053d5af55eb7831657eff247067a
SHA256

5c2c97f89704c710ed1638074c98d42c9d1ff1f53e25cdcd3ffd72d231f7480b
SHA512

9c9656373ff41dec29c83ab15140288ea6f473b17c1bfde0cbc2900d7269c63786e09b257a16ad8e6fe7e8ab64eacf8011d5d7b214a18fac3b692d84c98cd65c

Score

10^/10

nloader loader

Malware Config

Extracted

Language

xlm4.0

Source

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 (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	864	1820	cmd.exe	EXCEL.EXE

Nloader Payload 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/556-77-0x0000000000150000-0x0000000000155000-memory.dmp	nloader
behavioral1/memory/556-74-0x0000000000130000-0x0000000000137000-memory.dmp	nloader
behavioral1/memory/556-71-0x0000000000120000-0x0000000000129000-memory.dmp	nloader
behavioral1/memory/556-79-0x0000000000110000-0x0000000000116000-memory.dmp	nloader

Blocklisted process makes network request 1 IoCs

Processes:

rundll32.exe

flow pid process

6 556 rundll32.exe
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

556 rundll32.exe
Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

EXCEL.EXE

description ioc process

Key opened \REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor EXCEL.EXE

flow	pid	process
6	556	rundll32.exe

pid	process
556	rundll32.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor	EXCEL.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

Processes:

EXCEL.EXE

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1820 EXCEL.EXE
Suspicious use of SetWindowsHookEx 5 IoCs

Processes:

EXCEL.EXE

pid process

1820 EXCEL.EXE
1820 EXCEL.EXE
1820 EXCEL.EXE
1820 EXCEL.EXE
1820 EXCEL.EXE

pid	process
1820	EXCEL.EXE

pid	process
1820	EXCEL.EXE
1820	EXCEL.EXE
1820	EXCEL.EXE
1820	EXCEL.EXE
1820	EXCEL.EXE

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 1820 wrote to memory of 864	1820	EXCEL.EXE	cmd.exe
PID 1820 wrote to memory of 864	1820	EXCEL.EXE	cmd.exe
PID 1820 wrote to memory of 864	1820	EXCEL.EXE	cmd.exe
PID 1820 wrote to memory of 864	1820	EXCEL.EXE	cmd.exe
PID 864 wrote to memory of 1636	864	cmd.exe	certutil.exe
PID 864 wrote to memory of 1636	864	cmd.exe	certutil.exe
PID 864 wrote to memory of 1636	864	cmd.exe	certutil.exe
PID 864 wrote to memory of 1636	864	cmd.exe	certutil.exe
PID 864 wrote to memory of 556	864	cmd.exe	rundll32.exe
PID 864 wrote to memory of 556	864	cmd.exe	rundll32.exe
PID 864 wrote to memory of 556	864	cmd.exe	rundll32.exe
PID 864 wrote to memory of 556	864	cmd.exe	rundll32.exe
PID 864 wrote to memory of 556	864	cmd.exe	rundll32.exe
PID 864 wrote to memory of 556	864	cmd.exe	rundll32.exe
PID 864 wrote to memory of 556	864	cmd.exe	rundll32.exe

C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\subscription_1618416583.xlsb
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1820

C:\Windows\SysWOW64\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:864

C:\Windows\SysWOW64\certutil.exe
certutil -decode C:\Users\Public\130486.dot C:\Users\Public\130486.pgj
3⤵
PID:1636

C:\Windows\SysWOW64\rundll32.exe
rundll32 C:\Users\Public\130486.pgj,DF1
3⤵
- Blocklisted process makes network request
- Loads dropped DLL
PID:556

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

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/556-74-0x0000000000130000-0x0000000000137000-memory.dmp

Filesize
28KB

Download
memory/556-67-0x0000000000000000-mapping.dmp

Download
memory/556-77-0x0000000000150000-0x0000000000155000-memory.dmp

Filesize
20KB

Download
memory/556-76-0x0000000000133000-0x0000000000134000-memory.dmp

Filesize
4KB

Download
memory/556-71-0x0000000000120000-0x0000000000129000-memory.dmp

Filesize
36KB

Download
memory/556-79-0x0000000000110000-0x0000000000116000-memory.dmp

Filesize
24KB

Download
memory/864-63-0x0000000000000000-mapping.dmp

Download
memory/1636-64-0x0000000000000000-mapping.dmp

Download
memory/1636-65-0x0000000076641000-0x0000000076643000-memory.dmp

Filesize
8KB

Download
memory/1820-62-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1820-61-0x00000000716D1000-0x00000000716D3000-memory.dmp

Filesize
8KB

Download
memory/1820-60-0x000000002F141000-0x000000002F144000-memory.dmp

Filesize
12KB

Download
memory/1820-80-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads