39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860

General

Target

39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe
Size

82KB
MD5

a077a15d1c76cceed1e456aa3d489a19
SHA1

31c01fb0872426529723c0923cb105d1eaf756c5
SHA256

39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860
SHA512

16b2124eb85a3898a7e9f106fff172a0aa168779ce26a2c4b9346bcda2b958de9edb64869c743ee5f3300b62f052f59f44a83b234d24f916b61d340ae385dda7
SSDEEP

1536:RshfSWHHNvoLqNwDDGw02eQmh0HjWOXKpHr:GhfxHNIreQm+HiAKpHr

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2696	rundll32.exe

Loads dropped DLL 2 IoCs

pid	Process
1636	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe
1636	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.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	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*"	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\notepad¢¬.exe	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe
File opened for modification	C:\Windows\SysWOW64\¢«.exe	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe
File created	C:\Windows\SysWOW64\¢«.exe	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe
File opened for modification	C:\Windows\SysWOW64\notepad¢¬.exe	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system\rundll32.exe	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe
File created	C:\Windows\system\rundll32.exe	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe

Modifies registry class 15 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1"	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe
Key created	\REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1"	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe
Key created	\REGISTRY\MACHINE\Software\Classes\MSipv	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainUp = "1717270178"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*"	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad.exe %1"	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainVer = "506"	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\MSipv	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainSetup = "1717270178"	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	rundll32.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
1636	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe
1636	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe
1636	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe
1636	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe
1636	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe
1636	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe
1636	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe
1636	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe
1636	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe
1636	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe
1636	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe
1636	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe
1636	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe
1636	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2696	rundll32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1636	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe
2696	rundll32.exe
2696	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1636 wrote to memory of 2696	1636	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe	28
PID 1636 wrote to memory of 2696	1636	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe	28
PID 1636 wrote to memory of 2696	1636	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe	28
PID 1636 wrote to memory of 2696	1636	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe	28
PID 1636 wrote to memory of 2696	1636	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe	28
PID 1636 wrote to memory of 2696	1636	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe	28
PID 1636 wrote to memory of 2696	1636	39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe	28

C:\Users\Admin\AppData\Local\Temp\39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.exe
"C:\Users\Admin\AppData\Local\Temp\39474d3299f50b0f8a7c7370b77237279d572f719259759b34caa18b23105860.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:1636
- 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:2696

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
81KB

MD5
dab0fd4bed3d4af8a0565f565daa47d7

SHA1
dd6fedfd22c992838b0e72ec6bcb0292db08a3db

SHA256
09aa515ef3c920b28a13b6a1ed8ffdbd286bca022a7ab1d6cfda6110f4977c88

SHA512
f05b00540b099e3fa1d57bcd93b08a151ee216a512e12f9d9b0490d1d3a97997a766d3158aa092245959a7bcd89b5bde082ed4729a92ff04afcf3c451851fa0f

Download Submit
\Windows\system\rundll32.exe

Filesize
76KB

MD5
59289e15b542cd1489061d6dafa7c86d

SHA1
df9efacf903f045d15a061459f72bfc506de6e65

SHA256
482ef96ede19f8ed35ae7a2d67b05e134a1654a51fdac17960e5195ae1714d77

SHA512
23d3b4972a8218297269d97fdf67a17ce99f8be16f79ad710c00efaf49aa36744db7df687cad6a3eba78d4ffd7c2584fa6d6996dc1a31f01bc0fd7f4bd2e7fa6

Download Submit
memory/1636-0-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download
memory/1636-12-0x00000000003B0000-0x00000000003C6000-memory.dmp

Filesize
88KB

Download
memory/1636-21-0x00000000003B0000-0x00000000003B2000-memory.dmp

Filesize
8KB

Download
memory/1636-20-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download
memory/2696-18-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads