nloader | 426edb65615875c5f8fd31118142f0b3d2e29b360a7995d69d58803e61c1f81e

General

Target

_____.xls
Size

153KB
MD5

cb5a37aac155775daed9abcfd680f39c
SHA1

75cfc87fe3f6f517e684729a558358fd5d492599
SHA256

426edb65615875c5f8fd31118142f0b3d2e29b360a7995d69d58803e61c1f81e
SHA512

cd12773f8a606b0e04e7e02f4b8f1abab1c8efb13008ee6134771954c857f32df6dfd7f74b5a43d206eae40ceac4219e09910c22918a02f2a57e95f747d9b39f

Score

10^/10

nloader loader

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 2 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

certutil.exerundll32.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	268	2032	certutil.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	924	2032	rundll32.exe	EXCEL.EXE

Nloader Payload 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/924-69-0x0000000000180000-0x0000000000189000-memory.dmp	nloader
behavioral1/memory/924-72-0x0000000010000000-0x0000000010007000-memory.dmp	nloader
behavioral1/memory/924-76-0x0000000000160000-0x0000000000167000-memory.dmp	nloader

Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

924 rundll32.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1480 924 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
924	rundll32.exe

pid	pid_target	process	target process
1480	924	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-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	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
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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

2032 EXCEL.EXE
Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

WerFault.exe

pid process

1480 WerFault.exe
1480 WerFault.exe
1480 WerFault.exe
1480 WerFault.exe
1480 WerFault.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

WerFault.exe

description pid process

Token: SeDebugPrivilege 1480 WerFault.exe
Suspicious use of SetWindowsHookEx 6 IoCs

Processes:

EXCEL.EXE

pid process

2032 EXCEL.EXE
2032 EXCEL.EXE
2032 EXCEL.EXE
2032 EXCEL.EXE
2032 EXCEL.EXE
2032 EXCEL.EXE

pid	process
2032	EXCEL.EXE

pid	process
1480	WerFault.exe
1480	WerFault.exe
1480	WerFault.exe
1480	WerFault.exe
1480	WerFault.exe

description	pid	process
Token: SeDebugPrivilege	1480	WerFault.exe

pid	process
2032	EXCEL.EXE
2032	EXCEL.EXE
2032	EXCEL.EXE
2032	EXCEL.EXE
2032	EXCEL.EXE
2032	EXCEL.EXE

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

EXCEL.EXErundll32.exe

description	pid	process	target process
PID 2032 wrote to memory of 268	2032	EXCEL.EXE	certutil.exe
PID 2032 wrote to memory of 268	2032	EXCEL.EXE	certutil.exe
PID 2032 wrote to memory of 268	2032	EXCEL.EXE	certutil.exe
PID 2032 wrote to memory of 268	2032	EXCEL.EXE	certutil.exe
PID 2032 wrote to memory of 924	2032	EXCEL.EXE	rundll32.exe
PID 2032 wrote to memory of 924	2032	EXCEL.EXE	rundll32.exe
PID 2032 wrote to memory of 924	2032	EXCEL.EXE	rundll32.exe
PID 2032 wrote to memory of 924	2032	EXCEL.EXE	rundll32.exe
PID 2032 wrote to memory of 924	2032	EXCEL.EXE	rundll32.exe
PID 2032 wrote to memory of 924	2032	EXCEL.EXE	rundll32.exe
PID 2032 wrote to memory of 924	2032	EXCEL.EXE	rundll32.exe
PID 924 wrote to memory of 1480	924	rundll32.exe	WerFault.exe
PID 924 wrote to memory of 1480	924	rundll32.exe	WerFault.exe
PID 924 wrote to memory of 1480	924	rundll32.exe	WerFault.exe
PID 924 wrote to memory of 1480	924	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\_____.xls
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2032

C:\Windows\SysWOW64\certutil.exe
"C:\Windows\System32\certutil.exe" -decode C:\Users\Public\jahi1399.png C:\Users\Public\jahi1399.pn
2⤵
- Process spawned unexpected child process
PID:268

C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\System32\rundll32.exe" C:\Users\Public\jahi1399.pn,DF j1
2⤵
- Process spawned unexpected child process
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:924

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 924 -s 332
3⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1480

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\jahi1399.pn

MD5
8a9a8739404210e7e454dc2466872f23

SHA1
a3dbb6cb1eed87147f734c933e087bd66954ca18

SHA256
8229a6d0339c001fd0ce51db1b10748d37c838baee130afea2488f2ad0e05ac4

SHA512
2479c99ffc4002c909a1e6acf66ed2b6dc32efeea0b6182eb2ca8bb5cbe65bd85e507a0bab5f1e38232918cf59f29b592dc1f83b4d9684106ebf5707e057726e

Download Submit
C:\Users\Public\jahi1399.png

MD5
a72d21e3af2cefc6ce364953a8e2d8b5

SHA1
34ed7ede30fee07b0bf64b56404bd5d43dad0be9

SHA256
0bd28eb6cbff3d7344f3e5718729ada8317edcf16e231f925dafd964cc44dcad

SHA512
606b0694680d5c4b350bc2c48b3e15399fcd94ced1977f5d423a58af2c789d72dc19e9371f1db0b7d0c953b211785851e19666dcd347d8a6a03b325eddbc4ec1

Download Submit
\Users\Public\jahi1399.pn

MD5
8a9a8739404210e7e454dc2466872f23

SHA1
a3dbb6cb1eed87147f734c933e087bd66954ca18

SHA256
8229a6d0339c001fd0ce51db1b10748d37c838baee130afea2488f2ad0e05ac4

SHA512
2479c99ffc4002c909a1e6acf66ed2b6dc32efeea0b6182eb2ca8bb5cbe65bd85e507a0bab5f1e38232918cf59f29b592dc1f83b4d9684106ebf5707e057726e

Download Submit
memory/268-62-0x0000000000000000-mapping.dmp

Download
memory/268-63-0x0000000075C31000-0x0000000075C33000-memory.dmp

Filesize
8KB

Download
memory/924-65-0x0000000000000000-mapping.dmp

Download
memory/924-69-0x0000000000180000-0x0000000000189000-memory.dmp

Filesize
36KB

Download
memory/924-72-0x0000000010000000-0x0000000010007000-memory.dmp

Filesize
28KB

Download
memory/924-74-0x0000000010003000-0x0000000010004000-memory.dmp

Filesize
4KB

Download
memory/924-76-0x0000000000160000-0x0000000000167000-memory.dmp

Filesize
28KB

Download
memory/1480-75-0x0000000000000000-mapping.dmp

Download
memory/1480-77-0x0000000000280000-0x0000000000281000-memory.dmp

Filesize
4KB

Download
memory/2032-59-0x000000002F511000-0x000000002F514000-memory.dmp

Filesize
12KB

Download
memory/2032-61-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/2032-60-0x0000000071D11000-0x0000000071D13000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads