f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2

General

Target

f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
Size

82KB
MD5

becf7cd3f261df82f7b378dd2a0ec127
SHA1

0b0367244cf4e668911198fa53c2d819eb8fbc4f
SHA256

f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2
SHA512

576991dd429fa243f3430621b1e7a601a4fd36b6b3e3d64540d6a6135c1e9210f8ea5fc629d74183c74a012f112b1d05fd2a3834eb6da93e15bbcd50d22986ef
SSDEEP

768:agO5xRYi+SfSWHHNvvG5bnl/NqNwsKVDstHxYD0p1aXKynF0vQmYZS0HdJnfWOcm:RshfSWHHNvoLqNwDDGw02eQmh0HjWOd

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4472	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	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*"	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\¢«.exe	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
File created	C:\Windows\SysWOW64\¢«.exe	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
File opened for modification	C:\Windows\SysWOW64\notepad¢¬.exe	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
File created	C:\Windows\SysWOW64\notepad¢¬.exe	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system\rundll32.exe	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
File created	C:\Windows\system\rundll32.exe	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe

Modifies registry class 15 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.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\txtfile\shell\open\command\ = "notepad¢¬ %1"	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\MSipv	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
Key created	\REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1"	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainSetup = "1697223383"	rundll32.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\" %*"	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad.exe %1"	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
Key created	\REGISTRY\MACHINE\Software\Classes\MSipv	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainUp = "1697223383"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 28 IoCs

pid	Process
1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
4472	rundll32.exe
4472	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1876 wrote to memory of 4472	1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe	90
PID 1876 wrote to memory of 4472	1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe	90
PID 1876 wrote to memory of 4472	1876	f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe	90

C:\Users\Admin\AppData\Local\Temp\f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.exe
"C:\Users\Admin\AppData\Local\Temp\f9c038922b545416d36e75a7c61dea7c25aab891c7881fee1b3e46219e93d8c2.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:1876
- C:\Windows\system\rundll32.exe
  C:\Windows\system\rundll32.exe
  2⤵
  - Executes dropped EXE
  - Modifies system executable filetype association
  - Modifies registry class
  - Suspicious use of SetWindowsHookEx
  PID:4472

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
83KB

MD5
da2b943090fdd31f3de2f45e45c6d1c2

SHA1
49a3bac6cd5fe10f300687643e34c06c48623f6f

SHA256
3e8b66142d42eef6aea8a3e289ab644f4517c4f65bac662b23c206925a2a56fb

SHA512
5151d884677b79d630ca1898bf414ae6fa1fcfc90fed568e9bc893fe2924c306ac8e86fff44fec8a3221eea0bd948680d50bed44cea4c18bbb89c787e5235338

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

Filesize
78KB

MD5
9761484c73b830dab492b7dcb3376873

SHA1
6b1d9d660273ab297d83834a7e4a68fc95118871

SHA256
6a1b49f4495504fb13e43e38c77f5dc725ad2dd403d9d9abdb5ec1b1de5ffe72

SHA512
30e3728f8e1f2f31da18f54e941b5e829f87e26fa16deb611b5a91c5a05fac26677ccfdb6a5358fabccb5e0806250c08ba91a0945922f97a907a43caf8e79ef9

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

Filesize
78KB

MD5
9761484c73b830dab492b7dcb3376873

SHA1
6b1d9d660273ab297d83834a7e4a68fc95118871

SHA256
6a1b49f4495504fb13e43e38c77f5dc725ad2dd403d9d9abdb5ec1b1de5ffe72

SHA512
30e3728f8e1f2f31da18f54e941b5e829f87e26fa16deb611b5a91c5a05fac26677ccfdb6a5358fabccb5e0806250c08ba91a0945922f97a907a43caf8e79ef9

Download Submit
memory/1876-0-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download
memory/1876-13-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download
memory/4472-14-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads