nloader | 6c229ae1e0497a93bdc1655fed580e13fc94b300133de8f423984efbe0bc1138

General

Target

Fattura.xlsb
Size

249KB
MD5

cfb756f36616e64f4da99dce90b25661
SHA1

00f48058178e506ad535f7f5c00b632c41ba4b8f
SHA256

051770ec73c6bb36b839af3fcdc2e28e14f8e8c24f77f89bdc034c19f05516ed
SHA512

fce764ec2d370a3709af0a2a8e1eca125e175e3c14849362a9d301b13f631a44d3dbb2289d1cb224f1357aeaa0da42b0d6c54c544d7c226ca6b9d6f5d6a0a9e6

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	1188	1632	cmd.exe	EXCEL.EXE

Nloader Payload 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/800-71-0x00000000001D0000-0x00000000001D5000-memory.dmp	nloader

Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

800 rundll32.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

632 800 WerFault.exe 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

pid	process
800	rundll32.exe

pid	pid_target	process	target process
632	800	WerFault.exe	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\Toolbar\ShowDiscussionButton = "Yes"	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
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar	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 (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
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
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 (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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1632 EXCEL.EXE
Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

WerFault.exe

pid process

632 WerFault.exe
632 WerFault.exe
632 WerFault.exe
632 WerFault.exe
632 WerFault.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

WerFault.exe

description pid process

Token: SeDebugPrivilege 632 WerFault.exe
Suspicious use of SetWindowsHookEx 5 IoCs

Processes:

EXCEL.EXE

pid process

1632 EXCEL.EXE
1632 EXCEL.EXE
1632 EXCEL.EXE
1632 EXCEL.EXE
1632 EXCEL.EXE

pid	process
1632	EXCEL.EXE

pid	process
632	WerFault.exe
632	WerFault.exe
632	WerFault.exe
632	WerFault.exe
632	WerFault.exe

description	pid	process
Token: SeDebugPrivilege	632	WerFault.exe

pid	process
1632	EXCEL.EXE
1632	EXCEL.EXE
1632	EXCEL.EXE
1632	EXCEL.EXE
1632	EXCEL.EXE

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

EXCEL.EXEcmd.exerundll32.exe

description	pid	process	target process
PID 1632 wrote to memory of 1188	1632	EXCEL.EXE	cmd.exe
PID 1632 wrote to memory of 1188	1632	EXCEL.EXE	cmd.exe
PID 1632 wrote to memory of 1188	1632	EXCEL.EXE	cmd.exe
PID 1632 wrote to memory of 1188	1632	EXCEL.EXE	cmd.exe
PID 1188 wrote to memory of 572	1188	cmd.exe	certutil.exe
PID 1188 wrote to memory of 572	1188	cmd.exe	certutil.exe
PID 1188 wrote to memory of 572	1188	cmd.exe	certutil.exe
PID 1188 wrote to memory of 572	1188	cmd.exe	certutil.exe
PID 1188 wrote to memory of 800	1188	cmd.exe	rundll32.exe
PID 1188 wrote to memory of 800	1188	cmd.exe	rundll32.exe
PID 1188 wrote to memory of 800	1188	cmd.exe	rundll32.exe
PID 1188 wrote to memory of 800	1188	cmd.exe	rundll32.exe
PID 1188 wrote to memory of 800	1188	cmd.exe	rundll32.exe
PID 1188 wrote to memory of 800	1188	cmd.exe	rundll32.exe
PID 1188 wrote to memory of 800	1188	cmd.exe	rundll32.exe
PID 800 wrote to memory of 632	800	rundll32.exe	WerFault.exe
PID 800 wrote to memory of 632	800	rundll32.exe	WerFault.exe
PID 800 wrote to memory of 632	800	rundll32.exe	WerFault.exe
PID 800 wrote to memory of 632	800	rundll32.exe	WerFault.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\Fattura.xlsb
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1632

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:1188

C:\Windows\SysWOW64\certutil.exe
certutil -decode C:\Users\Public\130486.dot C:\Users\Public\130486.pgj
3⤵
PID:572

C:\Windows\SysWOW64\rundll32.exe
rundll32 C:\Users\Public\130486.pgj,DF1
3⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:800

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 800 -s 432
4⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:632

Network

MITRE ATT&CK Matrix ATT&CK 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

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Public\130486.dot
MD5
6419bb0e1d573eb7f069459a6140b305

SHA1
304b3025cc04eec5bd5dbab2aea2d315425c7012

SHA256
ca7cad96c718e1fb8d38fcf1cb81a311cbcaa45991499aa6ddebb91ef862acc0

SHA512
6948043ae458463778896aff887ee405cfa1f243bae0d2d6a2f9f2c33f9c19f3aafa056a79088307f8023f220511fa2453860707b03166a0d0f1df88553e1397

Download Submit
C:\Users\Public\130486.pgj
MD5
8d7a888b48d11e2847363286357b1352

SHA1
d4fded711883ba0e7b801ceec2cf58920d294c32

SHA256
9759f0a782cc79fcf71a4af40bb321ab6cdd33fb043a406bbd502ccdede45902

SHA512
6eee5b900a2f492d55ef784433342b2ca18880e293cd6d5c0cad4773710d5a6dfc2eca5a61c3303b77ec9bd6563d8051da8f00bf1ce1f4b24f0fd4a43a84b9aa

Download Submit
\Users\Public\130486.pgj
MD5
8d7a888b48d11e2847363286357b1352

SHA1
d4fded711883ba0e7b801ceec2cf58920d294c32

SHA256
9759f0a782cc79fcf71a4af40bb321ab6cdd33fb043a406bbd502ccdede45902

SHA512
6eee5b900a2f492d55ef784433342b2ca18880e293cd6d5c0cad4773710d5a6dfc2eca5a61c3303b77ec9bd6563d8051da8f00bf1ce1f4b24f0fd4a43a84b9aa

Download Submit
memory/572-64-0x0000000000000000-mapping.dmp

Download
memory/572-65-0x0000000075551000-0x0000000075553000-memory.dmp

Filesize
8KB

Download
memory/632-72-0x0000000000000000-mapping.dmp

Download
memory/632-73-0x0000000000350000-0x0000000000351000-memory.dmp

Filesize
4KB

Download
memory/800-67-0x0000000000000000-mapping.dmp

Download
memory/800-71-0x00000000001D0000-0x00000000001D5000-memory.dmp

Filesize
20KB

Download
memory/1188-63-0x0000000000000000-mapping.dmp

Download
memory/1632-62-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1632-61-0x0000000071831000-0x0000000071833000-memory.dmp

Filesize
8KB

Download
memory/1632-60-0x000000002FF61000-0x000000002FF64000-memory.dmp

Filesize
12KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads