nloader | 3ec34f115754827e485cf6eece92db8051fd85c1ebfd104494f5e6c634d07b08

General

Target

詳細情報/詳細情報.xlsb
Size

317KB
MD5

169685039016891f5442292ad95e51c9
SHA1

a2db74f9ab457c403e238cb2410848447f89548e
SHA256

7d1ff39fc6daab153ad6477554415336578256257aa81fd796a48b89c7a8b2e8
SHA512

7c990325b11c661fb3acd7a0f8ed312844b190d3211c2468aa7854271717c9ad96c77dd5e9fcf7042a2e5ce6001d7a6a4edc48265e052d93e128334de4e0e905

Score

10^/10

nloader loader upx

Malware Config

Extracted

Language

xlm4.0

Source

Signatures

Nloader
Simple loader that includes the keyword 'cambo' 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	1456	1640	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\14118.biy	acprotect
\Users\Public\14118.biy	acprotect

Nloader Payload 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/912-70-0x0000000010000000-0x0000000010005000-memory.dmp	nloader

Blocklisted process makes network request 1 IoCs

Processes:

rundll32.exe

flow pid process

5 912 rundll32.exe

flow	pid	process
5	912	rundll32.exe

UPX packed file 2 IoCs

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

upx

Processes:

resource	yara_rule
C:\Users\Public\14118.biy	upx
\Users\Public\14118.biy	upx

Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

912 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
912	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-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\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-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\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-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1640 EXCEL.EXE
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

1640 EXCEL.EXE
1640 EXCEL.EXE
1640 EXCEL.EXE

pid	process
1640	EXCEL.EXE

pid	process
1640	EXCEL.EXE
1640	EXCEL.EXE
1640	EXCEL.EXE

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 1640 wrote to memory of 1456	1640	EXCEL.EXE	cmd.exe
PID 1640 wrote to memory of 1456	1640	EXCEL.EXE	cmd.exe
PID 1640 wrote to memory of 1456	1640	EXCEL.EXE	cmd.exe
PID 1640 wrote to memory of 1456	1640	EXCEL.EXE	cmd.exe
PID 1456 wrote to memory of 460	1456	cmd.exe	certutil.exe
PID 1456 wrote to memory of 460	1456	cmd.exe	certutil.exe
PID 1456 wrote to memory of 460	1456	cmd.exe	certutil.exe
PID 1456 wrote to memory of 460	1456	cmd.exe	certutil.exe
PID 1456 wrote to memory of 912	1456	cmd.exe	rundll32.exe
PID 1456 wrote to memory of 912	1456	cmd.exe	rundll32.exe
PID 1456 wrote to memory of 912	1456	cmd.exe	rundll32.exe
PID 1456 wrote to memory of 912	1456	cmd.exe	rundll32.exe
PID 1456 wrote to memory of 912	1456	cmd.exe	rundll32.exe
PID 1456 wrote to memory of 912	1456	cmd.exe	rundll32.exe
PID 1456 wrote to memory of 912	1456	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\詳細情報\詳細情報.xlsb
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1640

C:\Windows\SysWOW64\cmd.exe
cmd.exe /c certutil -decode %PUBLIC%\14118.doy %PUBLIC%\14118.biy && rundll32 %PUBLIC%\14118.biy,DF1
2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:1456

C:\Windows\SysWOW64\certutil.exe
certutil -decode C:\Users\Public\14118.doy C:\Users\Public\14118.biy
3⤵
PID:460

C:\Windows\SysWOW64\rundll32.exe
rundll32 C:\Users\Public\14118.biy,DF1
3⤵
- Blocklisted process makes network request
- Loads dropped DLL
PID:912

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\14118.biy

MD5
c396b0ff21f2b3cc725d62ced30d7f7e

SHA1
9299535ba312523cd592e0f934b2bf6189036bff

SHA256
cfb1c43b61e75910658b937278c04a52ee6eb24a4c1898fd09895520e0abc35b

SHA512
c0531ab56fd23a14ac38964d8f585cea2055e72e3af13a07208f2acfea0d781d5cc4f5c46660f921f743b283a29c91e203eb2bdd8d6d76c7eb9bdb14fe21043a

Download Submit
C:\Users\Public\14118.doy

MD5
0e3c5eefbc1aed998dea5979725486d7

SHA1
1ad963e49a028715b11c74d3c2b6804ae0e3f428

SHA256
841829535618a03f974b20423df823f787395b7fbf8d7b4b96e4d04c6c1e7f8c

SHA512
367016e628391059ac7b3f782b2d0d4be9f351e0ea8cf5ec00b58b72a0881d8e8a478c06fcc9d4114d83718c2e3584450239368239c4dac1379afa03dc14180e

Download Submit
\Users\Public\14118.biy

MD5
c396b0ff21f2b3cc725d62ced30d7f7e

SHA1
9299535ba312523cd592e0f934b2bf6189036bff

SHA256
cfb1c43b61e75910658b937278c04a52ee6eb24a4c1898fd09895520e0abc35b

SHA512
c0531ab56fd23a14ac38964d8f585cea2055e72e3af13a07208f2acfea0d781d5cc4f5c46660f921f743b283a29c91e203eb2bdd8d6d76c7eb9bdb14fe21043a

Download Submit
memory/460-63-0x0000000000000000-mapping.dmp

Download
memory/460-64-0x00000000761E1000-0x00000000761E3000-memory.dmp

Filesize
8KB

Download
memory/912-66-0x0000000000000000-mapping.dmp

Download
memory/912-70-0x0000000010000000-0x0000000010005000-memory.dmp

Filesize
20KB

Download
memory/1456-62-0x0000000000000000-mapping.dmp

Download
memory/1640-59-0x000000002F2D1000-0x000000002F2D4000-memory.dmp

Filesize
12KB

Download
memory/1640-60-0x0000000071521000-0x0000000071523000-memory.dmp

Filesize
8KB

Download
memory/1640-61-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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