71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54

General

Target

71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
Size

80KB
MD5

5735a6a5458c40d9f4d665fb56fa8b62
SHA1

8aba31307d45546cb009a8b0cfc79c4e0f832f29
SHA256

71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54
SHA512

0fef7772641e98003733ad933b854fc9006f25aea1a291d4efa763d0ac86173cb0baa6c1bfa9f9b38d6a562bf34597da851aa78bc208c81ca0e5ed8b6bf49a6c
SSDEEP

768:agO5xRYi+SfSWHHNvvG5bnl/NqNwsKVDstHxYD0p1aXKynF0vQmYZS0HdJnfWOMD:RshfSWHHNvoLqNwDDGw02eQmh0HjWOy

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2976	rundll32.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\" %*"	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.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	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*"	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\¢«.exe	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
File created	C:\Windows\SysWOW64\¢«.exe	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
File opened for modification	C:\Windows\SysWOW64\notepad¢¬.exe	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
File created	C:\Windows\SysWOW64\notepad¢¬.exe	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\system\rundll32.exe	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
File opened for modification	C:\Windows\system\rundll32.exe	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe

Modifies registry class 15 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad.exe %1"	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainVer = "506"	rundll32.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
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
Key created	\REGISTRY\MACHINE\Software\Classes\MSipv	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainUp = "1695271262"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1"	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1"	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\MSipv	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*"	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainSetup = "1695271262"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 28 IoCs

pid	Process
4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2976	rundll32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
2976	rundll32.exe
2976	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4420 wrote to memory of 2976	4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe	85
PID 4420 wrote to memory of 2976	4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe	85
PID 4420 wrote to memory of 2976	4420	71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe	85

C:\Users\Admin\AppData\Local\Temp\71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.exe
"C:\Users\Admin\AppData\Local\Temp\71cf6e21855662ae341fbc57a0a966216d9505a84fa3a06be4f2304d65446b54.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:4420
- 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:2976

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
77KB

MD5
2f5f968821303e715c994ae20e253526

SHA1
04d0645b6bd202663d67032be39e92a2569be5bf

SHA256
442f9e74ed98260a3e8623819bfa882d213b859c49e96e7d734ffbdaa37badd3

SHA512
5cc495eefca69c94694b1d592dc1d73c428f0fd1cf6e02abeb45319af9e3d483e666fcc4148d8632602dfe4bb952f43583a57bbc12af25d127949cfbbd9c45cf

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

Filesize
76KB

MD5
9e8f7065af37dcf970b89de4e954c13f

SHA1
907202ca1bd43ab85afec2a20332f0c02b0b8b93

SHA256
cb73c67dd3b6ac3939b2c81250ae05d3ee31a3c3f0cf6e2608b86d2a02e08f36

SHA512
b53cb7689a6faa8a399063fb46edc8a9b9b2879a519e318e0fce8306cca1476a5c112883109d99f00ba512b0e36ccd089fd536a2acb720d84c775bc2efd8948e

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

Filesize
76KB

MD5
9e8f7065af37dcf970b89de4e954c13f

SHA1
907202ca1bd43ab85afec2a20332f0c02b0b8b93

SHA256
cb73c67dd3b6ac3939b2c81250ae05d3ee31a3c3f0cf6e2608b86d2a02e08f36

SHA512
b53cb7689a6faa8a399063fb46edc8a9b9b2879a519e318e0fce8306cca1476a5c112883109d99f00ba512b0e36ccd089fd536a2acb720d84c775bc2efd8948e

Download Submit
memory/2976-14-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download
memory/4420-0-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download
memory/4420-13-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads