nloader | 720ac949e6743c94b40a02c010489f57696122431ccd4d9ab7a3eee00b8f7a77

General

Target

B06CO4I2G0u642m5Gi6R.xlsb
Size

327KB
MD5

11ae52bd9c6a338582892d1a0e565269
SHA1

3b29f297c2abe8208da5071724db6361348d0d17
SHA256

720ac949e6743c94b40a02c010489f57696122431ccd4d9ab7a3eee00b8f7a77
SHA512

af8b710f2ef8b0edc2b97930cbc703bb08497c961b34357fb0b6895108de16e53d3fe936357cea2fc907c444256868ec71b5959c6bd933d60bb07053a094b4d7

Score

10^/10

nloader loader upx

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	1848	1100	cmd.exe	EXCEL.EXE

ACProtect 1.3x - 1.4x DLL software 2 IoCs

Detects file using ACProtect software.

Processes:

resource	yara_rule
C:\Users\Public\42237.h5	acprotect
\Users\Public\42237.h5	acprotect

Nloader Payload 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/652-71-0x0000000010000000-0x0000000010005000-memory.dmp	nloader

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
C:\Users\Public\42237.h5	upx
\Users\Public\42237.h5	upx

Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

652 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
652	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 (int)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	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 (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
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\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1100 EXCEL.EXE
Suspicious use of SetWindowsHookEx 8 IoCs

Processes:

EXCEL.EXE

pid process

1100 EXCEL.EXE
1100 EXCEL.EXE
1100 EXCEL.EXE
1100 EXCEL.EXE
1100 EXCEL.EXE
1100 EXCEL.EXE
1100 EXCEL.EXE
1100 EXCEL.EXE

pid	process
1100	EXCEL.EXE

pid	process
1100	EXCEL.EXE
1100	EXCEL.EXE
1100	EXCEL.EXE
1100	EXCEL.EXE
1100	EXCEL.EXE
1100	EXCEL.EXE
1100	EXCEL.EXE
1100	EXCEL.EXE

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 1100 wrote to memory of 1848	1100	EXCEL.EXE	cmd.exe
PID 1100 wrote to memory of 1848	1100	EXCEL.EXE	cmd.exe
PID 1100 wrote to memory of 1848	1100	EXCEL.EXE	cmd.exe
PID 1100 wrote to memory of 1848	1100	EXCEL.EXE	cmd.exe
PID 1848 wrote to memory of 1404	1848	cmd.exe	certutil.exe
PID 1848 wrote to memory of 1404	1848	cmd.exe	certutil.exe
PID 1848 wrote to memory of 1404	1848	cmd.exe	certutil.exe
PID 1848 wrote to memory of 1404	1848	cmd.exe	certutil.exe
PID 1848 wrote to memory of 652	1848	cmd.exe	rundll32.exe
PID 1848 wrote to memory of 652	1848	cmd.exe	rundll32.exe
PID 1848 wrote to memory of 652	1848	cmd.exe	rundll32.exe
PID 1848 wrote to memory of 652	1848	cmd.exe	rundll32.exe
PID 1848 wrote to memory of 652	1848	cmd.exe	rundll32.exe
PID 1848 wrote to memory of 652	1848	cmd.exe	rundll32.exe
PID 1848 wrote to memory of 652	1848	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\B06CO4I2G0u642m5Gi6R.xlsb
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1100

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c certutil -f -decode C:\Users\Public\42237.j56 C:\Users\Public\42237.h5 && rundll32 C:\Users\Public\42237.h5,DF
2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:1848

C:\Windows\SysWOW64\certutil.exe
certutil -f -decode C:\Users\Public\42237.j56 C:\Users\Public\42237.h5
3⤵
PID:1404

C:\Windows\SysWOW64\rundll32.exe
rundll32 C:\Users\Public\42237.h5,DF
3⤵
- Loads dropped DLL
PID:652

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\42237.h5

MD5
b1db6f12dae0139b05a71ca223c63429

SHA1
7d7d27472d97ee575b04b51eb18395962ae97364

SHA256
80b174138e23b10108ec867bc7e8b3103f4de991f46120d9045d81cc66c9b9f6

SHA512
27cfd414e78d09836922c421b7f2d190e43210b4b95cf49c2ebac092b089ab0ec97be1a9424c4237091726a2653c6063e84300d456ce08fd6de5bcd6ded6b890

Download Submit
C:\Users\Public\42237.j56

MD5
f4aa389ce27da606fce35c19a3f59b93

SHA1
4424a1c07bde275caafed45ba0452ddc3cbc39c4

SHA256
2eeb1b3360a8749d9093214ec36219d74dbb678459094af580a192c5e52162aa

SHA512
e45fa17d6d957add2eb543b8bb5f17f50c6f118a8a5c19dabbb29a0069c70c1c5ab6f27ab0fa8e41feb4482f486d885ac15e981e8db596217bb79d580de51bdc

Download Submit
\Users\Public\42237.h5

MD5
b1db6f12dae0139b05a71ca223c63429

SHA1
7d7d27472d97ee575b04b51eb18395962ae97364

SHA256
80b174138e23b10108ec867bc7e8b3103f4de991f46120d9045d81cc66c9b9f6

SHA512
27cfd414e78d09836922c421b7f2d190e43210b4b95cf49c2ebac092b089ab0ec97be1a9424c4237091726a2653c6063e84300d456ce08fd6de5bcd6ded6b890

Download Submit
memory/652-67-0x0000000000000000-mapping.dmp

Download
memory/652-71-0x0000000010000000-0x0000000010005000-memory.dmp

Filesize
20KB

Download
memory/1100-60-0x000000002FD11000-0x000000002FD14000-memory.dmp

Filesize
12KB

Download
memory/1100-61-0x00000000715A1000-0x00000000715A3000-memory.dmp

Filesize
8KB

Download
memory/1100-62-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1404-64-0x0000000000000000-mapping.dmp

Download
memory/1404-65-0x00000000757D1000-0x00000000757D3000-memory.dmp

Filesize
8KB

Download
memory/1848-63-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads