4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6

General

Target

4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
Size

79KB
MD5

976db5b098511da58cac625226fd5361
SHA1

5099e477d770b9f06b6f1364599b189c858d9282
SHA256

4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6
SHA512

6051711661ead0a2b0bc94c108f2aad1192958d459aabe963f83e78800df10768750271cb02c15862ce5b877980040810e9b331bac30b2ec95d91abc610a1d26
SSDEEP

1536:RshfSWHHNvoLqNwDDGw02eQmh0HjWOwnqZkW:GhfxHNIreQm+HibnqZkW

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
5048	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	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*"	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\¢«.exe	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
File created	C:\Windows\SysWOW64\¢«.exe	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
File opened for modification	C:\Windows\SysWOW64\notepad¢¬.exe	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
File created	C:\Windows\SysWOW64\notepad¢¬.exe	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system\rundll32.exe	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
File created	C:\Windows\system\rundll32.exe	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe

Modifies registry class 15 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad.exe %1"	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1"	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
Key created	\REGISTRY\MACHINE\Software\Classes\MSipv	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainSetup = "1716543668"	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainUp = "1716543668"	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*"	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.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
Key created	\REGISTRY\MACHINE\Software\Classes\MSipv	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe

Suspicious behavior: EnumeratesProcesses 28 IoCs

pid	Process
3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
5048	rundll32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
5048	rundll32.exe
5048	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3952 wrote to memory of 5048	3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe	85
PID 3952 wrote to memory of 5048	3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe	85
PID 3952 wrote to memory of 5048	3952	4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe	85

C:\Users\Admin\AppData\Local\Temp\4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.exe
"C:\Users\Admin\AppData\Local\Temp\4d423737172e2f8bced9b02baa70a09eaf02da9364c51287b8ded485c490e4b6.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:3952
- 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:5048

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

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Downloads

C:\Windows\SysWOW64\notepad¢¬.exe

Filesize
79KB

MD5
bd0d71bfe4db2aa68994da67df3dc0a8

SHA1
3c7add6537259f714b172e728591b48150c4dee3

SHA256
92ac0924518f51eb9f821c287ab6bec19af35c86bef2e60b94b68f9210a138fd

SHA512
4009d275056f2054b26509f678670bec118776e736d28be125a94847f2374616e5812e917dabfd158722e76cb2071448a0c7af2ebf57a27152d19510904a5e92

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

Filesize
82KB

MD5
7ba817ae9124133a2e0e9e8073b559db

SHA1
3cd4a4ace3b5256079bbc41895aafa4619e627f8

SHA256
3d43a5a10c224d8ac973d21a49a565fc7ef7bd4fdf88645d33b87b5f48f4ec10

SHA512
ae6d2d80ca65694a8c4df0712e270e14787e835ec959cf88084ad9ba28125c4925df2db0faa4164bb7da9a2e94975b277f8c2fca08537e39d76040db52b0600d

Download Submit
memory/3952-0-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download
memory/3952-13-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads