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
2448	rundll32.exe

Loads dropped DLL 2 IoCs

pid	Process
3060	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
3060	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe

Modifies system executable filetype association 2 TTPs 5 IoCs

persistence

Modify Registry

T1112

Change Default File Association

T1546.001

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

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\notepad¢¬.exe	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
File created	C:\Windows\SysWOW64\notepad¢¬.exe	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
File opened for modification	C:\Windows\SysWOW64\¢«.exe	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
File created	C:\Windows\SysWOW64\¢«.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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*"	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad.exe %1"	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
Key created	\REGISTRY\MACHINE\Software\Classes\MSipv	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainSetup = "1721361009"	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	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\txtfile\shell\open\command\ = "notepad¢¬ %1"	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
Key created	\REGISTRY\MACHINE\Software\Classes\MSipv	4c3efbaf08e29e7a9e557d11c69eb9d0N.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\" %*"	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainUp = "1721361009"	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainVer = "506"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
3060	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
3060	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
3060	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
3060	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
3060	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
3060	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
3060	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
3060	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
3060	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
3060	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
3060	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
3060	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
3060	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
3060	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2448	rundll32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
3060	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
2448	rundll32.exe
2448	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 3060 wrote to memory of 2448	3060	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe	30
PID 3060 wrote to memory of 2448	3060	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe	30
PID 3060 wrote to memory of 2448	3060	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe	30
PID 3060 wrote to memory of 2448	3060	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe	30
PID 3060 wrote to memory of 2448	3060	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe	30
PID 3060 wrote to memory of 2448	3060	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe	30
PID 3060 wrote to memory of 2448	3060	4c3efbaf08e29e7a9e557d11c69eb9d0N.exe	30

C:\Users\Admin\AppData\Local\Temp\4c3efbaf08e29e7a9e557d11c69eb9d0N.exe
"C:\Users\Admin\AppData\Local\Temp\4c3efbaf08e29e7a9e557d11c69eb9d0N.exe"
1⤵
- Loads dropped DLL
- 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:3060
- 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:2448

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
2413ee08ae8370e666690ecec48ee8dc

SHA1
95682fc85d8a2df8d005132446e35aa771e24d75

SHA256
4f019fe276761b4cf8fe950be19b5335eb24a9e36349fcf00146fd63a9a9c1ba

SHA512
40577bf2618a5c2e65610f5aaa876d559fea1052caff6ba8bba6febadfa84218b1fd7aa57c45c367e2905021ce0ae2776841d9de7299115912a96ce790a0723d

Download Submit
memory/2448-28-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2448-27-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2448-20-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2448-32-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2448-31-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2448-22-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2448-30-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2448-26-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2448-25-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2448-24-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2448-23-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/2448-29-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3060-0-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3060-12-0x0000000000380000-0x0000000000395000-memory.dmp

Filesize
84KB

Download
memory/3060-21-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/3060-19-0x0000000000380000-0x0000000000395000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads