b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613

General

Target

b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe
Size

75KB
MD5

cfafe4588b13c3d269b4c4bf150b2246
SHA1

036297550fea10f03907b7cbfc1477400c5e47eb
SHA256

b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613
SHA512

60e50b8c35a631e871efc56fe2e5c5dbd02d5f4dd092e082287ba6eba8167caf2f1553f8563b79c89f575e3f7fea40153e24a730cda6ffecc395f06b9e114523
SSDEEP

768:agO5xRYi+SfSWHHNvvG5bnl/NqNwsKVDstHxYD0p1aXKynF0vQmYZS0HdJnfWOv:RshfSWHHNvoLqNwDDGw02eQmh0HjWOv

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1440	rundll32.exe

Loads dropped DLL 2 IoCs

pid	Process
1504	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe
1504	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.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\" %*"	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.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	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*"	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\¢«.exe	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe
File created	C:\Windows\SysWOW64\¢«.exe	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe
File opened for modification	C:\Windows\SysWOW64\notepad¢¬.exe	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe
File created	C:\Windows\SysWOW64\notepad¢¬.exe	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system\rundll32.exe	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe
File created	C:\Windows\system\rundll32.exe	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.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	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Modifies registry class 15 IoCs

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\txtfile\shell\open\command	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*"	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe
Key created	\REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainUp = "1727683810"	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainVer = "506"	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad.exe %1"	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe
Key created	\REGISTRY\MACHINE\Software\Classes\MSipv	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1"	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\MSipv	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1"	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainSetup = "1727683810"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
1504	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe
1504	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe
1504	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe
1504	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe
1504	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe
1504	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe
1504	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe
1504	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe
1504	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe
1504	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe
1504	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe
1504	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe
1504	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe
1504	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1440	rundll32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1504	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe
1440	rundll32.exe
1440	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1504 wrote to memory of 1440	1504	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe	31
PID 1504 wrote to memory of 1440	1504	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe	31
PID 1504 wrote to memory of 1440	1504	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe	31
PID 1504 wrote to memory of 1440	1504	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe	31
PID 1504 wrote to memory of 1440	1504	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe	31
PID 1504 wrote to memory of 1440	1504	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe	31
PID 1504 wrote to memory of 1440	1504	b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe	31

C:\Users\Admin\AppData\Local\Temp\b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe
"C:\Users\Admin\AppData\Local\Temp\b1fd86330d7d2f4124405a4c0c76f9fd4527a96b77210fef919211eeba00a613.exe"
1⤵
- Loads dropped DLL
- 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:1504
- 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:1440

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
73KB

MD5
d2c0dd76e05e3ed2106089468b2d65a2

SHA1
642967312de7e370e19515651b6cb460bec6e87e

SHA256
13cd0eb0d1b9065937173ff5e79f8b5088e0690d65e60d3782a491366697d2e3

SHA512
8e9c96fe25347aa869797e0ceba8adf0d74ad34a76a24e4fb9eb23dfdfe521b130802e3b2c8ee303f365b2bce51e70ff7bd211645c0c20b79a7ceba5d0dfc69a

Download Submit
\Windows\system\rundll32.exe

Filesize
77KB

MD5
a8f43c03e38f775632cf797b6dbaff92

SHA1
6f8750b5ca470785f8e595ac40ff385b71191140

SHA256
e3ac942d8543a3a077c38e36c5b02e966684105a5d3eb9b4449ad01209a6be40

SHA512
4cbdc9e0258ee97227061307a44bea44a65b2a80481f367c740bba7a19113fcef5679aa1ae4b0ce9d08d3027dc85de71f71c02a2a97f828fe361a5e102a23765

Download Submit
memory/1440-20-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download
memory/1504-0-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download
memory/1504-12-0x00000000002C0000-0x00000000002D6000-memory.dmp

Filesize
88KB

Download
memory/1504-19-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads