89cf672b4d9758ac461960c7b50cc7dd1748eb41a80c9486a64caccc6cdb23fa

General

Target

4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
Size

31KB
MD5

4c3efbaf08e29e7a9e557d11c69eb9d0
SHA1

c653d804ca130ce626821005c552a8e16827687e
SHA256

89cf672b4d9758ac461960c7b50cc7dd1748eb41a80c9486a64caccc6cdb23fa
SHA512

decddac20c0ae05dc5b8d9b19adb2ecd43aac3b804556439ee88daae119211b8f9376a054fd5f072be8e39e7d3a9711aceb23abcf84b9812299e4285d689016c
SSDEEP

768:PVEHJqjHyGvwFylDpulVSQJrE/2QmlCYZUl8zJHzjHCG:PH2nylslwHCCLc

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1548	rundll32.exe

Modifies system executable filetype association 2 TTPs 5 IoCs

persistence

Modify Registry

T1112

Change Default File Association

T1546.001

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*"	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\¢«.exe	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
File created	C:\Windows\SysWOW64\¢«.exe	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
File opened for modification	C:\Windows\SysWOW64\notepad¢¬.exe	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
File created	C:\Windows\SysWOW64\notepad¢¬.exe	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system\rundll32.exe	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
File created	C:\Windows\system\rundll32.exe	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe

Modifies registry class 15 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad.exe %1"	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainVer = "506"	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
Key created	\REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\MSipv	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1"	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
Key created	\REGISTRY\MACHINE\Software\Classes\MSipv	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*"	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainSetup = "1721361010"	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainUp = "1721361010"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 28 IoCs

pid	Process
4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1548	rundll32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
1548	rundll32.exe
1548	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4696 wrote to memory of 1548	4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe	87
PID 4696 wrote to memory of 1548	4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe	87
PID 4696 wrote to memory of 1548	4696	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe	87

C:\Users\Admin\AppData\Local\Temp\4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
"C:\Users\Admin\AppData\Local\Temp\4c3efbaf08e29e7a9e557d11c69eb9d0N.exe"
1⤵
- Modifies system executable filetype association
- Drops file in System32 directory
- Drops file in Windows directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4696
- C:\Windows\system\rundll32.exe
  C:\Windows\system\rundll32.exe
  2⤵
  - Executes dropped EXE
  - Modifies system executable filetype association
  - Modifies registry class
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  PID:1548

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

1

T1546

Change Default File Association

1

T1546.001

Privilege Escalation

Event Triggered Execution

1

T1546

Change Default File Association

1

T1546.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\notepad¢¬.exe

Filesize
27KB

MD5
76d7bb290b1c4a3998c8a3d7223f575f

SHA1
28a7d09ff5f0b47af4d04e1c4101dcdd6b199a7b

SHA256
472c75de7c3c65236835c57b1f30eedf9f0a3bb47b7cffbd824f42ddd41fc7bd

SHA512
efeb3e4873d52e47cbcc106ee5225e1b34ae548a194267662cf330f99d456dbf4ead28481f33d55abe27e7a79b98ebbb843a597e727ae9a352be3c30ea116651

Download Submit
C:\Windows\System\rundll32.exe

Filesize
28KB

MD5
649f25dbc0cc0413d948519dd88cd6ae

SHA1
0251125ace10e47e7c96f39f6fb058e1f5790623

SHA256
a509494d5d643cca40ad8e448c5cf5d0a75fc0eade2859718d6d5ab4c33a804d

SHA512
2d7916f1409f02986b7261f32552877f6158619a4aba010c2f82bffd0448f662a86540607ea9a177fabbad8290f2182d51fa84ae50a88b6e9931c5178b8709bc

Download Submit
memory/1548-19-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1548-14-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1548-15-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1548-16-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1548-17-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1548-18-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1548-20-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1548-21-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1548-22-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1548-23-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1548-24-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4696-13-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/4696-0-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads