1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400

General

Target

1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe
Size

81KB
MD5

ab24cd0704fae929b2c791b6dfeaa20e
SHA1

fc496346ee63807fa8bde273ab8436615c02b2ad
SHA256

1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400
SHA512

74da09fef5345435dd6bfde5b9bffd64d143c4550fb15918a9007dee608d7fdbbe1ad349d495512ff1da585a374d9ccaadf63ed164d89dd27accb099a7859adf
SSDEEP

1536:RshfSWHHNvoLqNwDDGw02eQmh0HjWOP6GMJr:GhfxHNIreQm+Hik6GMJr

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2904	rundll32.exe

Loads dropped DLL 2 IoCs

pid	Process
1680	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe
1680	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.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	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*"	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.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

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\¢«.exe	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe
File created	C:\Windows\SysWOW64\¢«.exe	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe
File opened for modification	C:\Windows\SysWOW64\notepad¢¬.exe	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe
File created	C:\Windows\SysWOW64\notepad¢¬.exe	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\system\rundll32.exe	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe
File opened for modification	C:\Windows\system\rundll32.exe	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe

Modifies registry class 15 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad.exe %1"	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.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\" %*"	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainVer = "506"	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
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe
Key created	\REGISTRY\MACHINE\Software\Classes\MSipv	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainSetup = "1715746796"	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\MSipv	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1"	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainUp = "1715746796"	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	rundll32.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
1680	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe
1680	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe
1680	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe
1680	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe
1680	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe
1680	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe
1680	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe
1680	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe
1680	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe
1680	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe
1680	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe
1680	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe
1680	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe
1680	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2904	rundll32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1680	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe
2904	rundll32.exe
2904	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1680 wrote to memory of 2904	1680	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe	28
PID 1680 wrote to memory of 2904	1680	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe	28
PID 1680 wrote to memory of 2904	1680	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe	28
PID 1680 wrote to memory of 2904	1680	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe	28
PID 1680 wrote to memory of 2904	1680	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe	28
PID 1680 wrote to memory of 2904	1680	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe	28
PID 1680 wrote to memory of 2904	1680	1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe	28

C:\Users\Admin\AppData\Local\Temp\1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.exe
"C:\Users\Admin\AppData\Local\Temp\1b49b943563df68409df41815e2a3377228eb6ae283e6024a5c05494b13af400.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:1680
- 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:2904

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
75af066563fb403e63cb5658383ae849

SHA1
7e21496e2b940f4ec5011de5a573c61021164edd

SHA256
357fd55b61a9f5eff49108b2e7b45db9719538f7a21a3ecdb6abffc0b06fb943

SHA512
cea4b2d4942bc8915c3f398504f23af383844dd91d2c6eacf1b2947066192b8c267905550e4301923aef2f1cfac935a83e09ac91e79e675439da1a85e15ebb79

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

Filesize
79KB

MD5
8d379944fd2362551d85035961c05be1

SHA1
594845ce05e1fcb03a8eaad76e2e92d433db8371

SHA256
5421f038dabe6fe1c91432140f1873a59b0a4b1f8ed7e6d60ac15b305c2e8230

SHA512
6282054ad073f7464e6c8650349afab5be4ea07a4a37da050e9754848767b18b460deeece24cabed0d6f974d4403e61c0ad9bd2d4b2c5af4db05bd27da8b84de

Download Submit
memory/1680-0-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download
memory/1680-12-0x00000000002F0000-0x0000000000306000-memory.dmp

Filesize
88KB

Download
memory/1680-19-0x00000000002F0000-0x0000000000306000-memory.dmp

Filesize
88KB

Download
memory/1680-22-0x00000000002F0000-0x00000000002F2000-memory.dmp

Filesize
8KB

Download
memory/1680-21-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download
memory/2904-20-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads