nloader | 3fbe10e0cd5ce03f9783b908b0706d66253ff1e30dd77f6435ed360a43c69e4d

General

Target

subscription_1615866472.xlsb
Size

279KB
MD5

07571645cfa9005361c68f1d84975550
SHA1

b9020bd1ae5f35489a288f2e5aa7c068e08d540d
SHA256

ee9ba17fb42f85ed79f5a9f15673327579538de8eb268ea134b97bff3f54c44c
SHA512

3345b205c17240f5d11265491de01530e99ae37b4d7f3ae482bd09f23e184bba5c109b027dc56fa3b8ff331eca999b69571cf2fba1adb39ddcee64fd55f30fe7

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 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	472	1116	certutil.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	320	1116	rundll32.exe	EXCEL.EXE

Nloader Payload 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/320-70-0x0000000000110000-0x0000000000119000-memory.dmp	nloader
behavioral1/memory/320-73-0x0000000010000000-0x0000000010007000-memory.dmp	nloader
behavioral1/memory/320-76-0x00000000001F0000-0x00000000001F5000-memory.dmp	nloader
behavioral1/memory/320-78-0x00000000000B0000-0x00000000000B6000-memory.dmp	nloader

Blocklisted process makes network request 1 IoCs

Processes:

rundll32.exe

flow pid process

4 320 rundll32.exe
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

320 rundll32.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1088 320 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

flow	pid	process
4	320	rundll32.exe

pid	process
320	rundll32.exe

pid	pid_target	process	target process
1088	320	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-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	EXCEL.EXE
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 (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
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt	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

1116 EXCEL.EXE
Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

WerFault.exe

pid process

1088 WerFault.exe
1088 WerFault.exe
1088 WerFault.exe
1088 WerFault.exe
1088 WerFault.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

WerFault.exe

pid process

1088 WerFault.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

WerFault.exe

description pid process

Token: SeDebugPrivilege 1088 WerFault.exe
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

1116 EXCEL.EXE
1116 EXCEL.EXE
1116 EXCEL.EXE

pid	process
1116	EXCEL.EXE

pid	process
1088	WerFault.exe
1088	WerFault.exe
1088	WerFault.exe
1088	WerFault.exe
1088	WerFault.exe

pid	process
1088	WerFault.exe

description	pid	process
Token: SeDebugPrivilege	1088	WerFault.exe

pid	process
1116	EXCEL.EXE
1116	EXCEL.EXE
1116	EXCEL.EXE

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

EXCEL.EXErundll32.exe

description	pid	process	target process
PID 1116 wrote to memory of 472	1116	EXCEL.EXE	certutil.exe
PID 1116 wrote to memory of 472	1116	EXCEL.EXE	certutil.exe
PID 1116 wrote to memory of 472	1116	EXCEL.EXE	certutil.exe
PID 1116 wrote to memory of 472	1116	EXCEL.EXE	certutil.exe
PID 1116 wrote to memory of 320	1116	EXCEL.EXE	rundll32.exe
PID 1116 wrote to memory of 320	1116	EXCEL.EXE	rundll32.exe
PID 1116 wrote to memory of 320	1116	EXCEL.EXE	rundll32.exe
PID 1116 wrote to memory of 320	1116	EXCEL.EXE	rundll32.exe
PID 1116 wrote to memory of 320	1116	EXCEL.EXE	rundll32.exe
PID 1116 wrote to memory of 320	1116	EXCEL.EXE	rundll32.exe
PID 1116 wrote to memory of 320	1116	EXCEL.EXE	rundll32.exe
PID 320 wrote to memory of 1088	320	rundll32.exe	WerFault.exe
PID 320 wrote to memory of 1088	320	rundll32.exe	WerFault.exe
PID 320 wrote to memory of 1088	320	rundll32.exe	WerFault.exe
PID 320 wrote to memory of 1088	320	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\subscription_1615866472.xlsb
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1116

C:\Windows\SysWOW64\certutil.exe
"C:\Windows\System32\certutil.exe" -decode C:\Users\Public\jahi1900.png C:\Users\Public\jahi1900.pn
2⤵
- Process spawned unexpected child process
PID:472

C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\System32\rundll32.exe" C:\Users\Public\jahi1900.pn,DF j1
2⤵
- Process spawned unexpected child process
- Blocklisted process makes network request
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:320

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 320 -s 488
3⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
PID:1088

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\jahi1900.pn

MD5
0a8d825d553010e21a0ccaf054b74992

SHA1
b22a0d35636bda3b79e27f9abccef48905a5b025

SHA256
b8212f866c5cdf1a823031e24fe10444aab103d8fb55a25821e1c7c7366e580f

SHA512
910741f5583c2657c1ea496f9c99cf42ceb48c4b477f439396a0dd30707de61f814811a3d628c746bf0219b47a57f2ce44b7f119c729d7dd96f4e2d9d00d121c

Download Submit
C:\Users\Public\jahi1900.png

MD5
89d8d0af6d7d8a53e340d99d2bdeeab9

SHA1
b147882fcae315ca39cb468c5a3f5a024ada6e5d

SHA256
897578ec998760b8cc1eb88e0c2f11a79cee4f88b3d87e67b4147d74e92343e9

SHA512
199269cc7d45314ffa1c6a2275a7f0ff8ab7c5f030a50bc1e74b9d471d88ba2c4fbe7ed14cb95cb23f515fce207575a29dae811ee26765e87524950e5e44b0a9

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\Users\Public\jahi1900.pn

MD5
0a8d825d553010e21a0ccaf054b74992

SHA1
b22a0d35636bda3b79e27f9abccef48905a5b025

SHA256
b8212f866c5cdf1a823031e24fe10444aab103d8fb55a25821e1c7c7366e580f

SHA512
910741f5583c2657c1ea496f9c99cf42ceb48c4b477f439396a0dd30707de61f814811a3d628c746bf0219b47a57f2ce44b7f119c729d7dd96f4e2d9d00d121c

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memory/320-76-0x00000000001F0000-0x00000000001F5000-memory.dmp

Filesize
20KB

Download
memory/320-66-0x0000000000000000-mapping.dmp

Download
memory/320-70-0x0000000000110000-0x0000000000119000-memory.dmp

Filesize
36KB

Download
memory/320-73-0x0000000010000000-0x0000000010007000-memory.dmp

Filesize
28KB

Download
memory/320-75-0x0000000010003000-0x0000000010004000-memory.dmp

Filesize
4KB

Download
memory/320-78-0x00000000000B0000-0x00000000000B6000-memory.dmp

Filesize
24KB

Download
memory/472-64-0x00000000767B1000-0x00000000767B3000-memory.dmp

Filesize
8KB

Download
memory/472-63-0x0000000000000000-mapping.dmp

Download
memory/1088-79-0x0000000000000000-mapping.dmp

Download
memory/1088-80-0x0000000000330000-0x0000000000331000-memory.dmp

Filesize
4KB

Download
memory/1116-62-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1116-61-0x0000000071B01000-0x0000000071B03000-memory.dmp

Filesize
8KB

Download
memory/1116-60-0x000000002F0F1000-0x000000002F0F4000-memory.dmp

Filesize
12KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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