nloader | 42aeef1b5f9d53105bd3d9076b7634e1eed53f89c9e3577426f4c51441e4fca4

General

Target

cancel_sub_JPL12345678901234.xlsb
Size

267KB
MD5

21a57dbd1dad6aec8edbbaeddabac81b
SHA1

f20bdcb3970bc9fabfff60628a71cfe318d4efe9
SHA256

42aeef1b5f9d53105bd3d9076b7634e1eed53f89c9e3577426f4c51441e4fca4
SHA512

a2339ff6347d6d3dff885b8317de5a87df589462052ac2c6dc8fb09715aca149379bc7e71e7c1ba2ccae976e7d0d4d1790971db6dc92b57ab35810953bc73563

Score

10^/10

nloader loader

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	796	788	cmd.exe	EXCEL.EXE

Nloader Payload 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/852-72-0x0000000000120000-0x0000000000125000-memory.dmp	nloader

Blocklisted process makes network request 1 IoCs

Processes:

rundll32.exe

flow pid process

4 852 rundll32.exe
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

852 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

flow	pid	process
4	852	rundll32.exe

pid	process
852	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-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
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
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	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\Toolbar\ShowDiscussionButton = "Yes"	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
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\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

788 EXCEL.EXE
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

788 EXCEL.EXE
788 EXCEL.EXE
788 EXCEL.EXE

pid	process
788	EXCEL.EXE

pid	process
788	EXCEL.EXE
788	EXCEL.EXE
788	EXCEL.EXE

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 788 wrote to memory of 1172	788	EXCEL.EXE	splwow64.exe
PID 788 wrote to memory of 1172	788	EXCEL.EXE	splwow64.exe
PID 788 wrote to memory of 1172	788	EXCEL.EXE	splwow64.exe
PID 788 wrote to memory of 1172	788	EXCEL.EXE	splwow64.exe
PID 788 wrote to memory of 796	788	EXCEL.EXE	cmd.exe
PID 788 wrote to memory of 796	788	EXCEL.EXE	cmd.exe
PID 788 wrote to memory of 796	788	EXCEL.EXE	cmd.exe
PID 788 wrote to memory of 796	788	EXCEL.EXE	cmd.exe
PID 796 wrote to memory of 464	796	cmd.exe	certutil.exe
PID 796 wrote to memory of 464	796	cmd.exe	certutil.exe
PID 796 wrote to memory of 464	796	cmd.exe	certutil.exe
PID 796 wrote to memory of 464	796	cmd.exe	certutil.exe
PID 796 wrote to memory of 852	796	cmd.exe	rundll32.exe
PID 796 wrote to memory of 852	796	cmd.exe	rundll32.exe
PID 796 wrote to memory of 852	796	cmd.exe	rundll32.exe
PID 796 wrote to memory of 852	796	cmd.exe	rundll32.exe
PID 796 wrote to memory of 852	796	cmd.exe	rundll32.exe
PID 796 wrote to memory of 852	796	cmd.exe	rundll32.exe
PID 796 wrote to memory of 852	796	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\cancel_sub_JPL12345678901234.xlsb
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:788

C:\Windows\splwow64.exe
C:\Windows\splwow64.exe 12288
2⤵
PID:1172

C:\Windows\SysWOW64\cmd.exe
cmd.exe /c certutil -decode C:\Users\Public\4802545.xs1 C:\Users\Public\4802545.xs2 && rundll32 C:\Users\Public\4802545.xs2,DF1
2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:796

C:\Windows\SysWOW64\certutil.exe
certutil -decode C:\Users\Public\4802545.xs1 C:\Users\Public\4802545.xs2
3⤵
PID:464

C:\Windows\SysWOW64\rundll32.exe
rundll32 C:\Users\Public\4802545.xs2,DF1
3⤵
- Blocklisted process makes network request
- Loads dropped DLL
PID:852

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Public\4802545.xs1

MD5
bcbb70f4818be65832fe12ddac0c7f80

SHA1
74174bb01ac70ddc2fbd1e978e8b676df6e1779f

SHA256
00443251583e39c29345f79bd1233dbcc8f4cb1ba5866d0e6b534124d3c6b80d

SHA512
5405ce84f14268e41b53d0ed964473b10aebb110df8e0a9257bb30aad29f87997e46f9a83e5103ce4c41a4a8c80e7c921cff76ed48c6deeee7a49a9204dffbfa

Download Submit
C:\Users\Public\4802545.xs2

MD5
ad7af24cebc0eb9fc18ea4d92252b664

SHA1
23caf9b06a47d3071d42e9dc11f6e6818614bb9f

SHA256
2bc60e31f8058d1be2517a27888d799229fd2a5c2b260be650d4446102ed55cc

SHA512
46afee95f7149cd304f10b06e7d7da8d922ac43b82ef7b4071fc3bdf618245ae9b33603b742506e0d95a27b1188bc242cd8473b020d8fdbe37526c2556a23361

Download Submit
\Users\Public\4802545.xs2

MD5
ad7af24cebc0eb9fc18ea4d92252b664

SHA1
23caf9b06a47d3071d42e9dc11f6e6818614bb9f

SHA256
2bc60e31f8058d1be2517a27888d799229fd2a5c2b260be650d4446102ed55cc

SHA512
46afee95f7149cd304f10b06e7d7da8d922ac43b82ef7b4071fc3bdf618245ae9b33603b742506e0d95a27b1188bc242cd8473b020d8fdbe37526c2556a23361

Download Submit
memory/464-65-0x0000000000000000-mapping.dmp

Download
memory/464-66-0x0000000075A71000-0x0000000075A73000-memory.dmp

Filesize
8KB

Download
memory/788-59-0x000000002FFA1000-0x000000002FFA4000-memory.dmp

Filesize
12KB

Download
memory/788-60-0x00000000711A1000-0x00000000711A3000-memory.dmp

Filesize
8KB

Download
memory/788-61-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/796-64-0x0000000000000000-mapping.dmp

Download
memory/852-68-0x0000000000000000-mapping.dmp

Download
memory/852-72-0x0000000000120000-0x0000000000125000-memory.dmp

Filesize
20KB

Download
memory/1172-63-0x000007FEFB9A1000-0x000007FEFB9A3000-memory.dmp

Filesize
8KB

Download
memory/1172-62-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads