409ed829f19024045d26cc5d3a06e15a097605e13ba938875eca054a7a4a30b1

Resubmissions

26-01-2021 15:48

210126-pmyenxgs76 10

22-01-2021 07:59

210122-fxn8cqm1we 8

Analysis

max time kernel
70s
max time network
14s
platform
windows7_x64
resource
win7v20201028
submitted
22-01-2021 07:59

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General

Target

8776139.docm
Size

70KB
MD5

b4d9b636a96350a5d2b08a85fa67206e
SHA1

487cd577e95eced143030254ccbefb4ab15338c7
SHA256

409ed829f19024045d26cc5d3a06e15a097605e13ba938875eca054a7a4a30b1
SHA512

19cfc08cdbb366a89888b829008c0e4391cb215e5e93076d30a7dfeba9cf64ce4049f2294d77c9170eee2e0722961d4ef9ca60126fc04782f73465600e103fca

Score

5^/10

ransomware

Malware Config

Signatures

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
ransomware

System Information Discovery
T1082
Drops file in Windows directory 1 IoCs

Processes:

WINWORD.EXE

description ioc process

File opened for modification C:\Windows\Debug\WIA\wiatrace.log WINWORD.EXE
Office loads VBA resources, possible macro or embedded object present

description	ioc	process
File opened for modification	C:\Windows\Debug\WIA\wiatrace.log	WINWORD.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

Processes:

WINWORD.EXE

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt	WINWORD.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"	WINWORD.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"	WINWORD.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"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	WINWORD.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"	WINWORD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

WINWORD.EXE

pid process

2028 WINWORD.EXE
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

WINWORD.EXE

pid process

2028 WINWORD.EXE
2028 WINWORD.EXE

pid	process
2028	WINWORD.EXE

pid	process
2028	WINWORD.EXE
2028	WINWORD.EXE

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

WINWORD.EXE

description	pid	process	target process
PID 2028 wrote to memory of 1784	2028	WINWORD.EXE	splwow64.exe
PID 2028 wrote to memory of 1784	2028	WINWORD.EXE	splwow64.exe
PID 2028 wrote to memory of 1784	2028	WINWORD.EXE	splwow64.exe
PID 2028 wrote to memory of 1784	2028	WINWORD.EXE	splwow64.exe

C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\8776139.docm"
1⤵
- Drops file in Windows directory
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2028

C:\Windows\splwow64.exe
C:\Windows\splwow64.exe 12288
2⤵
PID:1784

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/1784-5-0x0000000000000000-mapping.dmp

Download
memory/1784-6-0x000007FEFC511000-0x000007FEFC513000-memory.dmp

Filesize
8KB

Download
memory/2028-2-0x0000000073011000-0x0000000073014000-memory.dmp

Filesize
12KB

Download
memory/2028-3-0x0000000070A91000-0x0000000070A93000-memory.dmp

Filesize
8KB

Download
memory/2028-4-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download