a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008

General

Target

a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe
Size

77KB
MD5

00e79274ff97c90ed2e29a442cc6afb7
SHA1

de191d93c096eea4177edf5e492cead2f45e899c
SHA256

a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008
SHA512

de920536b9c6adb58f8a6f446bd595b60a3e43a2b36f01b2451d0f04545683bc8ea5dd5d8c1797a56dea91d3095961c73e4cd94ee7582141434813c121f381d1
SSDEEP

1536:RshfSWHHNvoLqNwDDGw02eQmh0HjWOmKK+:GhfxHNIreQm+HiBKK+

Score

7^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

rundll32.exe

pid process

2132 rundll32.exe

pid	process
2132	rundll32.exe

Loads dropped DLL 2 IoCs

Processes:

a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe

pid	process
2968	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe
2968	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe

Modifies system executable filetype association 2 TTPs 5 IoCs

persistence

Modify Registry

T1112

Change Default File Association

T1546.001

Processes:

a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exerundll32.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*"	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.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

Drops file in System32 directory 4 IoCs

Processes:

a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\¢«.exe	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe
File created	C:\Windows\SysWOW64\¢«.exe	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe
File opened for modification	C:\Windows\SysWOW64\notepad¢¬.exe	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe
File created	C:\Windows\SysWOW64\notepad¢¬.exe	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe

Drops file in Windows directory 2 IoCs

Processes:

a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe

description	ioc	process
File opened for modification	C:\Windows\system\rundll32.exe	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe
File created	C:\Windows\system\rundll32.exe	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe

Modifies registry class 15 IoCs

Processes:

a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exerundll32.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad.exe %1"	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1"	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe
Key created	\REGISTRY\MACHINE\Software\Classes\MSipv	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainUp = "1716420048"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1"	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\MSipv	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*"	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.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	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainVer = "506"	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainSetup = "1716420048"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

Processes:

a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe

pid	process
2968	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe
2968	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe
2968	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe
2968	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe
2968	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe
2968	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe
2968	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe
2968	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe
2968	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe
2968	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe
2968	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe
2968	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe
2968	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe
2968	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

rundll32.exe

pid process

2132 rundll32.exe
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exerundll32.exe

pid process

2968 a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe
2132 rundll32.exe
2132 rundll32.exe

pid	process
2132	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe

description	pid	process	target process
PID 2968 wrote to memory of 2132	2968	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe	rundll32.exe
PID 2968 wrote to memory of 2132	2968	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe	rundll32.exe
PID 2968 wrote to memory of 2132	2968	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe	rundll32.exe
PID 2968 wrote to memory of 2132	2968	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe	rundll32.exe
PID 2968 wrote to memory of 2132	2968	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe	rundll32.exe
PID 2968 wrote to memory of 2132	2968	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe	rundll32.exe
PID 2968 wrote to memory of 2132	2968	a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe	rundll32.exe

C:\Users\Admin\AppData\Local\Temp\a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.exe
"C:\Users\Admin\AppData\Local\Temp\a42bc7f4869646a2a9b0549ce5602194d2967e6a29cd58311e73d7e5f5bea008.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:2968
- 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:2132

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
83KB

MD5
bf5a05feee39e0a3d3f85602c635f79d

SHA1
c0afc108dc5cc994a1015d407306cb3d7012a4e5

SHA256
367550be47e7f4c4bd0645f768364005e97f1509f9f8d198b056c0279f8d45bf

SHA512
e6bb434309e55a9f61231e689f31628de61d8d4802072e461240eb4f07f3954d024641cbabf743de224c610d20d6f9d51f0c7018de62cc0e9e89c8da704afb13

Download Submit
\Windows\system\rundll32.exe

Filesize
74KB

MD5
8afc6392b274e77f621dfc7179bd9c9b

SHA1
86d895a9d5fc4eb044060e3d3b6af7f09478f29b

SHA256
b2af124512a882ec4eb69c36dcdf6fb1272dae1b87e0896c24628f81cd54ae67

SHA512
b37eee796688e778fb9de200775b20b545509e477573c5d4bfc5bfcf0c694eb316e25a4cfe608390da4fc87dbdf99e5e578fbb255dc20259b5076b768be6ae59

Download Submit
memory/2132-19-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download
memory/2968-0-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download
memory/2968-12-0x00000000003A0000-0x00000000003B6000-memory.dmp

Filesize
88KB

Download
memory/2968-21-0x00000000003A0000-0x00000000003A2000-memory.dmp

Filesize
8KB

Download
memory/2968-20-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads