nloader | 6d6ff6f138defb2bb7602c08c1cb22930f5e30ef264eeaf760f99d4ca95beca7

General

Target

subscription_1618592996.xlsb
Size

269KB
MD5

e86b9229ec1b692dff17c074843d27da
SHA1

61598ee67b6f4f5ac01a5f0752dfe3324d00c66f
SHA256

6d6ff6f138defb2bb7602c08c1cb22930f5e30ef264eeaf760f99d4ca95beca7
SHA512

a8f9105ab7b360c492e0409d1d5b3912eba29fe2175036af676083a145f0a80b5924745d3b64b8ac82f499ac3c16df15c6650f30ea9bb006cca30931984e265b

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	768	cmd.exe	EXCEL.EXE

Nloader Payload 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/824-71-0x0000000000140000-0x0000000000145000-memory.dmp	nloader

Blocklisted process makes network request 1 IoCs

Processes:

rundll32.exe

flow pid process

5 824 rundll32.exe
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

824 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	824	rundll32.exe

pid	process
824	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
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\Toolbar	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 (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
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
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
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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

768 EXCEL.EXE
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

768 EXCEL.EXE
768 EXCEL.EXE
768 EXCEL.EXE

pid	process
768	EXCEL.EXE

pid	process
768	EXCEL.EXE
768	EXCEL.EXE
768	EXCEL.EXE

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 768 wrote to memory of 432	768	EXCEL.EXE	cmd.exe
PID 768 wrote to memory of 432	768	EXCEL.EXE	cmd.exe
PID 768 wrote to memory of 432	768	EXCEL.EXE	cmd.exe
PID 768 wrote to memory of 432	768	EXCEL.EXE	cmd.exe
PID 432 wrote to memory of 1612	432	cmd.exe	certutil.exe
PID 432 wrote to memory of 1612	432	cmd.exe	certutil.exe
PID 432 wrote to memory of 1612	432	cmd.exe	certutil.exe
PID 432 wrote to memory of 1612	432	cmd.exe	certutil.exe
PID 432 wrote to memory of 824	432	cmd.exe	rundll32.exe
PID 432 wrote to memory of 824	432	cmd.exe	rundll32.exe
PID 432 wrote to memory of 824	432	cmd.exe	rundll32.exe
PID 432 wrote to memory of 824	432	cmd.exe	rundll32.exe
PID 432 wrote to memory of 824	432	cmd.exe	rundll32.exe
PID 432 wrote to memory of 824	432	cmd.exe	rundll32.exe
PID 432 wrote to memory of 824	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_1618592996.xlsb
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:768

C:\Windows\SysWOW64\cmd.exe
cmd.exe /c certutil -decode %PUBLIC%\496258.dof %PUBLIC%\496258.doh && rundll32 %PUBLIC%\496258.doh,DF1
2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:432

C:\Windows\SysWOW64\certutil.exe
certutil -decode C:\Users\Public\496258.dof C:\Users\Public\496258.doh
3⤵
PID:1612

C:\Windows\SysWOW64\rundll32.exe
rundll32 C:\Users\Public\496258.doh,DF1
3⤵
- Blocklisted process makes network request
- Loads dropped DLL
PID:824

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\496258.dof

MD5
f7e72deaacfad01ce83511f7a0573d42

SHA1
e07f231d8d1911964918f1d593a1b8ccde2aec59

SHA256
65078cbb043f24bb3bdad6f2ff82996d9e6d4f55334f9b3bb642b10448cd852e

SHA512
0877fd332e9829b6ca20b1aa32b3fd8fc727a197f9c2517c2c23fc8b8abf73be4b52732f124254d623c633934af9eb6f8f81dda4e8407375c548360f34129517

Download Submit
C:\Users\Public\496258.doh

MD5
95855134f3999425d0614e14e11ac0f8

SHA1
bff84288beaf968b658b176c15695f6ec1386113

SHA256
37d298ab9d815c7ec02ac0a304e114ddf1b27593f522dd881de094ab753ef33a

SHA512
9f5a438a12218ec21037345fab813d1b9aa43174db13ebba419ed884a4534ac296e2ea6179b87b032feb696281167004bc003bd2c9e8c56784f4cd7ef02dd929

Download Submit
\Users\Public\496258.doh

MD5
95855134f3999425d0614e14e11ac0f8

SHA1
bff84288beaf968b658b176c15695f6ec1386113

SHA256
37d298ab9d815c7ec02ac0a304e114ddf1b27593f522dd881de094ab753ef33a

SHA512
9f5a438a12218ec21037345fab813d1b9aa43174db13ebba419ed884a4534ac296e2ea6179b87b032feb696281167004bc003bd2c9e8c56784f4cd7ef02dd929

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

Download
memory/768-60-0x000000002FB11000-0x000000002FB14000-memory.dmp

Filesize
12KB

Download
memory/768-61-0x0000000071981000-0x0000000071983000-memory.dmp

Filesize
8KB

Download
memory/768-62-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/824-67-0x0000000000000000-mapping.dmp

Download
memory/824-71-0x0000000000140000-0x0000000000145000-memory.dmp

Filesize
20KB

Download
memory/1612-64-0x0000000000000000-mapping.dmp

Download
memory/1612-65-0x0000000075EF1000-0x0000000075EF3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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