nloader | 67c35a01ebe2933d5772677793719c2702ef18274e84fc188f5eb6eee4f32752

General

Target

_____.xlsb
Size

225KB
MD5

0abe41c27fa3f1e62b74ff4903887d86
SHA1

3707fed2be2ec70152bdc5cd691137a7d6b62013
SHA256

67c35a01ebe2933d5772677793719c2702ef18274e84fc188f5eb6eee4f32752
SHA512

0b6bc4a8f420c9cb463fa10ec1cfe64cf90ee132ee2f46ec739c381e0d2a21d848896cf1d89b88de9fb6d7b88c2ebc1c497ee8cba08205802c372da5e707f7a9

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 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	764	1904	cmd.exe	EXCEL.EXE

Nloader Payload 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/832-71-0x00000000002C0000-0x00000000002C6000-memory.dmp	nloader
behavioral1/memory/832-70-0x0000000000410000-0x0000000000419000-memory.dmp	nloader
behavioral1/memory/832-77-0x0000000000440000-0x0000000000445000-memory.dmp	nloader
behavioral1/memory/832-74-0x0000000000420000-0x0000000000427000-memory.dmp	nloader

Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

832 rundll32.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1344 832 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
832	rundll32.exe

pid	pid_target	process	target process
1344	832	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
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar	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 (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
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
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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1904 EXCEL.EXE
Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

WerFault.exe

pid process

1344 WerFault.exe
1344 WerFault.exe
1344 WerFault.exe
1344 WerFault.exe
1344 WerFault.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

WerFault.exe

description pid process

Token: SeDebugPrivilege 1344 WerFault.exe
Suspicious use of SetWindowsHookEx 5 IoCs

Processes:

EXCEL.EXE

pid process

1904 EXCEL.EXE
1904 EXCEL.EXE
1904 EXCEL.EXE
1904 EXCEL.EXE
1904 EXCEL.EXE

pid	process
1904	EXCEL.EXE

pid	process
1344	WerFault.exe
1344	WerFault.exe
1344	WerFault.exe
1344	WerFault.exe
1344	WerFault.exe

description	pid	process
Token: SeDebugPrivilege	1344	WerFault.exe

pid	process
1904	EXCEL.EXE
1904	EXCEL.EXE
1904	EXCEL.EXE
1904	EXCEL.EXE
1904	EXCEL.EXE

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

EXCEL.EXEcmd.exerundll32.exe

description	pid	process	target process
PID 1904 wrote to memory of 764	1904	EXCEL.EXE	cmd.exe
PID 1904 wrote to memory of 764	1904	EXCEL.EXE	cmd.exe
PID 1904 wrote to memory of 764	1904	EXCEL.EXE	cmd.exe
PID 1904 wrote to memory of 764	1904	EXCEL.EXE	cmd.exe
PID 764 wrote to memory of 740	764	cmd.exe	certutil.exe
PID 764 wrote to memory of 740	764	cmd.exe	certutil.exe
PID 764 wrote to memory of 740	764	cmd.exe	certutil.exe
PID 764 wrote to memory of 740	764	cmd.exe	certutil.exe
PID 764 wrote to memory of 832	764	cmd.exe	rundll32.exe
PID 764 wrote to memory of 832	764	cmd.exe	rundll32.exe
PID 764 wrote to memory of 832	764	cmd.exe	rundll32.exe
PID 764 wrote to memory of 832	764	cmd.exe	rundll32.exe
PID 764 wrote to memory of 832	764	cmd.exe	rundll32.exe
PID 764 wrote to memory of 832	764	cmd.exe	rundll32.exe
PID 764 wrote to memory of 832	764	cmd.exe	rundll32.exe
PID 832 wrote to memory of 1344	832	rundll32.exe	WerFault.exe
PID 832 wrote to memory of 1344	832	rundll32.exe	WerFault.exe
PID 832 wrote to memory of 1344	832	rundll32.exe	WerFault.exe
PID 832 wrote to memory of 1344	832	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\_____.xlsb
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1904

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:764

C:\Windows\SysWOW64\certutil.exe
certutil -decode C:\Users\Public\14118.doy C:\Users\Public\14118.biy
3⤵
PID:740

C:\Windows\SysWOW64\rundll32.exe
rundll32 C:\Users\Public\14118.biy,DF1
3⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:832

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 832 -s 468
4⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1344

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\14118.biy
MD5
d54955f8150d1ae905a9fbcaac97a71b

SHA1
b4027b0c59c4a7f2d0b2c5bd8409976b9bade4ed

SHA256
627f67c18ccda5a5e3e3b90738545c0553abee1cee81e03b447ba33d46674a58

SHA512
095609a5d0f08c9b5dc48e0f1501e69ec512806592da3add7d07a5b4d7abd745efa9e41f62ec3e43b4add34a01ccaf60722a8f5ecd945417fc47afcbc7294bcd

Download Submit
C:\Users\Public\14118.doy
MD5
d18a8f1eef6962d92e2eb47c2ef0e0d4

SHA1
18fc95b23c3a44e9e0d86516fc68c3a02e3a0a36

SHA256
559d08c26df410ad35dc227b4e55e6aeffbe549a5b8ff71d050e93dbfcce1495

SHA512
5716ffffe6d74373436a6f7d8a6b6ee80a85bda5b9ee813577955902f9bb3d31913c7d62005ea81f7a2ebdb6a8fdb1232bc83ffb709574688ac7ecd1505e2c78

Download Submit
\Users\Public\14118.biy
MD5
d54955f8150d1ae905a9fbcaac97a71b

SHA1
b4027b0c59c4a7f2d0b2c5bd8409976b9bade4ed

SHA256
627f67c18ccda5a5e3e3b90738545c0553abee1cee81e03b447ba33d46674a58

SHA512
095609a5d0f08c9b5dc48e0f1501e69ec512806592da3add7d07a5b4d7abd745efa9e41f62ec3e43b4add34a01ccaf60722a8f5ecd945417fc47afcbc7294bcd

Download Submit
memory/740-63-0x0000000000000000-mapping.dmp

Download
memory/740-64-0x0000000075781000-0x0000000075783000-memory.dmp

Filesize
8KB

Download
memory/764-62-0x0000000000000000-mapping.dmp

Download
memory/832-71-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/832-66-0x0000000000000000-mapping.dmp

Download
memory/832-70-0x0000000000410000-0x0000000000419000-memory.dmp

Filesize
36KB

Download
memory/832-77-0x0000000000440000-0x0000000000445000-memory.dmp

Filesize
20KB

Download
memory/832-76-0x0000000000423000-0x0000000000424000-memory.dmp

Filesize
4KB

Download
memory/832-74-0x0000000000420000-0x0000000000427000-memory.dmp

Filesize
28KB

Download
memory/1344-79-0x0000000000000000-mapping.dmp

Download
memory/1344-80-0x00000000004C0000-0x00000000004C1000-memory.dmp

Filesize
4KB

Download
memory/1904-61-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1904-60-0x0000000071271000-0x0000000071273000-memory.dmp

Filesize
8KB

Download
memory/1904-59-0x000000002F7C1000-0x000000002F7C4000-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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