nloader | 006c3eedb21ea1f0499fb3b9624b3f104bd0223f9bd1f84b4017e8e60f9da3c0

General

Target

_____.xls

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	1056	1684	certutil.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	568	1684	rundll32.exe	EXCEL.EXE

Nloader Payload 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/568-13-0x0000000000180000-0x0000000000189000-memory.dmp	nloader
behavioral1/memory/568-14-0x0000000010000000-0x0000000010007000-memory.dmp	nloader
behavioral1/memory/568-17-0x00000000000C0000-0x00000000000C7000-memory.dmp	nloader

Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

568 rundll32.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1084 568 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
568	rundll32.exe

pid	pid_target	process	target process
1084	568	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
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt	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
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 (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\Se&nd to OneNote	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
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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1684 EXCEL.EXE
Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

WerFault.exe

pid process

1084 WerFault.exe
1084 WerFault.exe
1084 WerFault.exe
1084 WerFault.exe
1084 WerFault.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

EXCEL.EXE

pid process

1684 EXCEL.EXE
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

WerFault.exe

description pid process

Token: SeDebugPrivilege 1084 WerFault.exe
Suspicious use of SetWindowsHookEx 6 IoCs

Processes:

EXCEL.EXE

pid process

1684 EXCEL.EXE
1684 EXCEL.EXE
1684 EXCEL.EXE
1684 EXCEL.EXE
1684 EXCEL.EXE
1684 EXCEL.EXE

pid	process
1684	EXCEL.EXE

pid	process
1084	WerFault.exe
1084	WerFault.exe
1084	WerFault.exe
1084	WerFault.exe
1084	WerFault.exe

pid	process
1684	EXCEL.EXE

description	pid	process
Token: SeDebugPrivilege	1084	WerFault.exe

pid	process
1684	EXCEL.EXE
1684	EXCEL.EXE
1684	EXCEL.EXE
1684	EXCEL.EXE
1684	EXCEL.EXE
1684	EXCEL.EXE

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

EXCEL.EXErundll32.exe

description	pid	process	target process
PID 1684 wrote to memory of 1056	1684	EXCEL.EXE	certutil.exe
PID 1684 wrote to memory of 1056	1684	EXCEL.EXE	certutil.exe
PID 1684 wrote to memory of 1056	1684	EXCEL.EXE	certutil.exe
PID 1684 wrote to memory of 1056	1684	EXCEL.EXE	certutil.exe
PID 1684 wrote to memory of 568	1684	EXCEL.EXE	rundll32.exe
PID 1684 wrote to memory of 568	1684	EXCEL.EXE	rundll32.exe
PID 1684 wrote to memory of 568	1684	EXCEL.EXE	rundll32.exe
PID 1684 wrote to memory of 568	1684	EXCEL.EXE	rundll32.exe
PID 1684 wrote to memory of 568	1684	EXCEL.EXE	rundll32.exe
PID 1684 wrote to memory of 568	1684	EXCEL.EXE	rundll32.exe
PID 1684 wrote to memory of 568	1684	EXCEL.EXE	rundll32.exe
PID 568 wrote to memory of 1084	568	rundll32.exe	WerFault.exe
PID 568 wrote to memory of 1084	568	rundll32.exe	WerFault.exe
PID 568 wrote to memory of 1084	568	rundll32.exe	WerFault.exe
PID 568 wrote to memory of 1084	568	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 behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1684
- C:\Windows\SysWOW64\certutil.exe
  "C:\Windows\System32\certutil.exe" -decode C:\Users\Public\jahi1088.png C:\Users\Public\jahi1088.pn
  2⤵
  - Process spawned unexpected child process
  PID:1056
- C:\Windows\SysWOW64\rundll32.exe
  "C:\Windows\System32\rundll32.exe" C:\Users\Public\jahi1088.pn,DF j1
  2⤵
  - Process spawned unexpected child process
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:568
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 568 -s 332
    3⤵
    - Program crash
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1084

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\jahi1088.pn

MD5
8a9a8739404210e7e454dc2466872f23

SHA1
a3dbb6cb1eed87147f734c933e087bd66954ca18

SHA256
8229a6d0339c001fd0ce51db1b10748d37c838baee130afea2488f2ad0e05ac4

SHA512
2479c99ffc4002c909a1e6acf66ed2b6dc32efeea0b6182eb2ca8bb5cbe65bd85e507a0bab5f1e38232918cf59f29b592dc1f83b4d9684106ebf5707e057726e

Download Submit
C:\Users\Public\jahi1088.png

MD5
a72d21e3af2cefc6ce364953a8e2d8b5

SHA1
34ed7ede30fee07b0bf64b56404bd5d43dad0be9

SHA256
0bd28eb6cbff3d7344f3e5718729ada8317edcf16e231f925dafd964cc44dcad

SHA512
606b0694680d5c4b350bc2c48b3e15399fcd94ced1977f5d423a58af2c789d72dc19e9371f1db0b7d0c953b211785851e19666dcd347d8a6a03b325eddbc4ec1

Download Submit
\Users\Public\jahi1088.pn

MD5
8a9a8739404210e7e454dc2466872f23

SHA1
a3dbb6cb1eed87147f734c933e087bd66954ca18

SHA256
8229a6d0339c001fd0ce51db1b10748d37c838baee130afea2488f2ad0e05ac4

SHA512
2479c99ffc4002c909a1e6acf66ed2b6dc32efeea0b6182eb2ca8bb5cbe65bd85e507a0bab5f1e38232918cf59f29b592dc1f83b4d9684106ebf5707e057726e

Download Submit
memory/568-17-0x00000000000C0000-0x00000000000C7000-memory.dmp

Filesize
28KB

Download
memory/568-14-0x0000000010000000-0x0000000010007000-memory.dmp

Filesize
28KB

Download
memory/568-13-0x0000000000180000-0x0000000000189000-memory.dmp

Filesize
36KB

Download
memory/568-9-0x0000000000000000-mapping.dmp

Download
memory/908-5-0x000007FEF68D0000-0x000007FEF6B4A000-memory.dmp

Filesize
2.5MB

Download
memory/1056-6-0x0000000000000000-mapping.dmp

Download
memory/1056-7-0x00000000756A1000-0x00000000756A3000-memory.dmp

Filesize
8KB

Download
memory/1084-15-0x0000000000000000-mapping.dmp

Download
memory/1084-16-0x0000000001DE0000-0x0000000001DF1000-memory.dmp

Filesize
68KB

Download
memory/1084-18-0x0000000000360000-0x0000000000361000-memory.dmp

Filesize
4KB

Download
memory/1684-2-0x000000002FED1000-0x000000002FED4000-memory.dmp

Filesize
12KB

Download
memory/1684-4-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1684-3-0x0000000071AC1000-0x0000000071AC3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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