b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00

General

Target

b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
Size

74KB
MD5

74d7170d8b910ae2e2453337fdee45b5
SHA1

42bd70ccffd224630d2b04b82a7df33053a8613a
SHA256

b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00
SHA512

9c9494a2f08954909a89c58be0c96d57c35b3dc4e2831d8ae6028da526c015000aff3363e102eae4122faa55fa84ce5aab7a726f64678f9123ff63af142bbefc
SSDEEP

768:agO5xRYi+SfSWHHNvvG5bnl/NqNwsKVDstHxYD0p1aXKynF0vQmYZS0HdJnfWO:RshfSWHHNvoLqNwDDGw02eQmh0HjWO

Score

7^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

rundll32.exe

pid process

1104 rundll32.exe

pid	process
1104	rundll32.exe

Modifies system executable filetype association 2 TTPs 5 IoCs

persistence

Modify Registry

T1112

Change Default File Association

T1546.001

Processes:

rundll32.exeb1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*"	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	rundll32.exe

Drops file in System32 directory 4 IoCs

Processes:

b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\¢«.exe	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
File created	C:\Windows\SysWOW64\¢«.exe	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
File opened for modification	C:\Windows\SysWOW64\notepad¢¬.exe	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
File created	C:\Windows\SysWOW64\notepad¢¬.exe	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe

Drops file in Windows directory 2 IoCs

Processes:

b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe

description	ioc	process
File opened for modification	C:\Windows\system\rundll32.exe	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
File created	C:\Windows\system\rundll32.exe	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe

Modifies registry class 15 IoCs

Processes:

b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exerundll32.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*"	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.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
Key created	\REGISTRY\MACHINE\Software\Classes\MSipv	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainSetup = "1716519961"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1"	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainUp = "1716519961"	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad.exe %1"	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
Key created	\REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
Key created	\REGISTRY\MACHINE\Software\Classes\MSipv	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe

Suspicious behavior: EnumeratesProcesses 28 IoCs

Processes:

b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe

pid	process
3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

rundll32.exe

pid process

1104 rundll32.exe
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exerundll32.exe

pid process

3252 b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
1104 rundll32.exe
1104 rundll32.exe

pid	process
1104	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe

description	pid	process	target process
PID 3252 wrote to memory of 1104	3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe	rundll32.exe
PID 3252 wrote to memory of 1104	3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe	rundll32.exe
PID 3252 wrote to memory of 1104	3252	b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe	rundll32.exe

C:\Users\Admin\AppData\Local\Temp\b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.exe
"C:\Users\Admin\AppData\Local\Temp\b1f2fcaff038e4ad2b718d3b4c07f7744c103490fb6b2f849f40b7024db38c00.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:3252

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:1104

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
85KB

MD5
8d93ba10321bfa42a04f47498347e9a5

SHA1
f50e838ccb71687f6a57f8f0e5d4682de4c61413

SHA256
50582e5dc19a6bc564e6d91f6519642c112a4759af72bde509d708ef9876ba17

SHA512
5ae814ba67297417b090d9d43df0a088e45037291fd268b6a33efd97f89582f79875be963fee1fcadcf21059aa1102fe8c6c0035f27e78220953a9891f53827c

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

Filesize
75KB

MD5
9b3499b7dc62cb656439e3933c3f2043

SHA1
1c96035c9e6ddd3f10988bc3dc4e441cca51e901

SHA256
e7a227ac38cb2c9a4cbed328d7dea625f701b51ce81abf805e2bcbbfb21c5cbe

SHA512
2a324e2b1156d6345ea7b0febc552a059e170798e6e6bf95905a297d052478d4901f72e29dad401da34c1a1cfa0deaf156e0a759e42f8c781d0e128ace702e96

Download Submit
memory/3252-0-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download
memory/3252-13-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads