3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436

General

Target

3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe
Size

75KB
MD5

e63a95ee4a83e87d61f0d11de56ff8bf
SHA1

c9665889a20609001f1524a33563b48a733387fe
SHA256

3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436
SHA512

8272c60cedaad53e4ce1733c8f41f33df7dfe1c741dee7ed10068c2853291fa63b190fed79e3cb160332837ad69aee7966b51e35cd1f646b5389a5cbda471f14
SSDEEP

768:agO5xRYi+SfSWHHNvvG5bnl/NqNwsKVDstHxYD0p1aXKynF0vQmYZS0HdJnfWOwJ:RshfSWHHNvoLqNwDDGw02eQmh0HjWOwJ

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2944	rundll32.exe

Loads dropped DLL 2 IoCs

pid	Process
2028	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe
2028	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.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	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*"	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.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	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe
File created	C:\Windows\SysWOW64\¢«.exe	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe
File opened for modification	C:\Windows\SysWOW64\notepad¢¬.exe	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe
File created	C:\Windows\SysWOW64\notepad¢¬.exe	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system\rundll32.exe	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe
File created	C:\Windows\system\rundll32.exe	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe

Modifies registry class 15 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainUp = "1716200653"	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainVer = "506"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*"	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe
Key created	\REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad.exe %1"	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe
Key created	\REGISTRY\MACHINE\Software\Classes\MSipv	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainSetup = "1716200653"	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"	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.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\MSipv	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
2028	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe
2028	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe
2028	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe
2028	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe
2028	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe
2028	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe
2028	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe
2028	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe
2028	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe
2028	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe
2028	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe
2028	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe
2028	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe
2028	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2944	rundll32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2028	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe
2944	rundll32.exe
2944	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2028 wrote to memory of 2944	2028	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe	28
PID 2028 wrote to memory of 2944	2028	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe	28
PID 2028 wrote to memory of 2944	2028	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe	28
PID 2028 wrote to memory of 2944	2028	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe	28
PID 2028 wrote to memory of 2944	2028	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe	28
PID 2028 wrote to memory of 2944	2028	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe	28
PID 2028 wrote to memory of 2944	2028	3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe	28

C:\Users\Admin\AppData\Local\Temp\3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.exe
"C:\Users\Admin\AppData\Local\Temp\3b7acc3e01fd54b4224c85d866891b1a6922f86e85b5d7b5d57b27103b436436.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:2028
- 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:2944

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
75KB

MD5
d19b11bcc7bb5f9faefb6fff6b631c01

SHA1
7e2f95e1566b252e38b4cc7c7febe337d8a5c0a0

SHA256
afae9d78f31f164a6d69b6ca07a3e88ffa0ab9e63cf998c86e945acad68006cd

SHA512
ad5ea210bb247487e8dd2ed3044b91b59c495c3d036ac3228d412ffa3bce25902e7d0bdf99a6b4110cafde3966e5bf69ac711cb61e2ddee2b71b9a16812ca267

Download Submit
\Windows\system\rundll32.exe

Filesize
84KB

MD5
f53b488bb5e94eab2271f534ad14cf5a

SHA1
23870bacd6ce1a1acd39df73bbac669f68342374

SHA256
667a9ec5ab9845a11132a3c2247a23d52627e6dfacea4768f27fe0e54186ded6

SHA512
adbbee80c0ddb241a53c3ac1882407f5ac8fa3eb596315cd596f7b5cd63bb4418525ce173bf6427030c5edf5529265064c9de8b3bf5d66e12eed6393cd7d61a3

Download Submit
memory/2028-0-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download
memory/2028-11-0x00000000002A0000-0x00000000002B6000-memory.dmp

Filesize
88KB

Download
memory/2028-18-0x00000000002A0000-0x00000000002B6000-memory.dmp

Filesize
88KB

Download
memory/2028-21-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download
memory/2028-22-0x00000000002A0000-0x00000000002A2000-memory.dmp

Filesize
8KB

Download
memory/2944-19-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads