b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e

General

Target

b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
Size

73KB
MD5

bbdd6da61bc7b21b9c70667747aec648
SHA1

9d5140a2921c5c66bc1d07c151fffbd5f4c03321
SHA256

b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e
SHA512

de3422044824c222112f17d1d310d1b7272fa5d06030fe19411b60bf5b324fc657256bc532c32fda92c93cedf5c96326b27183025714643cc46a7878fec680a9
SSDEEP

768:agO5xRYi+SfSWHHNvvG5bnl/NqNwsKVDstHxYD0p1aXKynF0vQmYZS0HdJnfWO:RshfSWHHNvoLqNwDDGw02eQmh0HjWO

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1564	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\" %*"	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*"	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	rundll32.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\¢«.exe	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
File created	C:\Windows\SysWOW64\¢«.exe	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
File opened for modification	C:\Windows\SysWOW64\notepad¢¬.exe	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
File created	C:\Windows\SysWOW64\notepad¢¬.exe	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system\rundll32.exe	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
File created	C:\Windows\system\rundll32.exe	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Modifies registry class 15 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1"	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainUp = "1728115357"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	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	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*"	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
Key created	\REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad.exe %1"	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
Key created	\REGISTRY\MACHINE\Software\Classes\MSipv	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainSetup = "1728115357"	rundll32.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

Suspicious behavior: EnumeratesProcesses 28 IoCs

pid	Process
2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1564	rundll32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
1564	rundll32.exe
1564	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2740 wrote to memory of 1564	2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe	84
PID 2740 wrote to memory of 1564	2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe	84
PID 2740 wrote to memory of 1564	2740	b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe	84

C:\Users\Admin\AppData\Local\Temp\b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe
"C:\Users\Admin\AppData\Local\Temp\b1251e425a94b6e66af3d28d870a3d2fc04100a771d7be85c2c2e17fdf73164e.exe"
1⤵
- Modifies system executable filetype association
- Drops file in System32 directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2740
- C:\Windows\system\rundll32.exe
  C:\Windows\system\rundll32.exe
  2⤵
  - Executes dropped EXE
  - Modifies system executable filetype association
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  PID:1564

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\notepad¢¬.exe

Filesize
75KB

MD5
8c983ee0e4b13c20681ba78a80cb944e

SHA1
95360a86873f568236c19037323bcfac3452eb85

SHA256
05a75b04d6a89eb81ad54213a1b5cd27db79c351cd4a89f66f0de0dd98fd43f0

SHA512
059387eeaac2b9a3846007cc1ba073f69152f59051e8d9f0a36af9967c7340dc301d437717c22d7e6c919f77e1146e0869e94ba0f9bc97199ae6e0d1cd82d68f

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

Filesize
78KB

MD5
cdd42f20b2cc9fae5937ee02c26d5887

SHA1
fb7262cc37a2db832ccdefcc5207f147f43c48c4

SHA256
be353c5b071e68c92bdd193c7ae243ff0be8f9327613742a7e967c6b5c797c75

SHA512
3c39f5482a72cb81ce53e5fa06cadb1e219fedbd45029dd7bbdf706dd10b0a928587c454ce9c361471190add90712c70dd8d96eb3672cfa9c40668a9061e49d2

Download Submit
memory/1564-14-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download
memory/2740-0-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download
memory/2740-13-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads