be58a027ae8df7933a92acd5190c1e2775c3e4137e126fd1456b01c0b4a6f069

General

Target

b042426e8a30b6ecf6e44f2b21138560N.exe
Size

82KB
MD5

b042426e8a30b6ecf6e44f2b21138560
SHA1

99f9e5a21b4719cb9b4627897d398fe083e8cade
SHA256

be58a027ae8df7933a92acd5190c1e2775c3e4137e126fd1456b01c0b4a6f069
SHA512

dc86c047cd17d27832cdbf2ded7f65fa93047622d9b87ace822fd9d5dc2586aed086f1b67f23708d4336b955df9d87b42eb52dfe4682432d3b8730a98cfca4e5
SSDEEP

1536:RshfSWHHNvoLqNwDDGw02eQmh0HjWOzr9/q9:GhfxHNIreQm+Hi8r9/q9

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2744	rundll32.exe

Loads dropped DLL 2 IoCs

pid	Process
2932	b042426e8a30b6ecf6e44f2b21138560N.exe
2932	b042426e8a30b6ecf6e44f2b21138560N.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	b042426e8a30b6ecf6e44f2b21138560N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*"	b042426e8a30b6ecf6e44f2b21138560N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	b042426e8a30b6ecf6e44f2b21138560N.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 created	C:\Windows\SysWOW64\notepad¢¬.exe	b042426e8a30b6ecf6e44f2b21138560N.exe
File opened for modification	C:\Windows\SysWOW64\¢«.exe	b042426e8a30b6ecf6e44f2b21138560N.exe
File created	C:\Windows\SysWOW64\¢«.exe	b042426e8a30b6ecf6e44f2b21138560N.exe
File opened for modification	C:\Windows\SysWOW64\notepad¢¬.exe	b042426e8a30b6ecf6e44f2b21138560N.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system\rundll32.exe	b042426e8a30b6ecf6e44f2b21138560N.exe
File created	C:\Windows\system\rundll32.exe	b042426e8a30b6ecf6e44f2b21138560N.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	b042426e8a30b6ecf6e44f2b21138560N.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\MSipv	b042426e8a30b6ecf6e44f2b21138560N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*"	b042426e8a30b6ecf6e44f2b21138560N.exe
Key created	\REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command	b042426e8a30b6ecf6e44f2b21138560N.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainVer = "506"	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\exefile\shell\open\command	b042426e8a30b6ecf6e44f2b21138560N.exe
Key created	\REGISTRY\MACHINE\Software\Classes\MSipv	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainSetup = "1726336803"	rundll32.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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad.exe %1"	b042426e8a30b6ecf6e44f2b21138560N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	b042426e8a30b6ecf6e44f2b21138560N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1"	b042426e8a30b6ecf6e44f2b21138560N.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainUp = "1726336803"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
2932	b042426e8a30b6ecf6e44f2b21138560N.exe
2932	b042426e8a30b6ecf6e44f2b21138560N.exe
2932	b042426e8a30b6ecf6e44f2b21138560N.exe
2932	b042426e8a30b6ecf6e44f2b21138560N.exe
2932	b042426e8a30b6ecf6e44f2b21138560N.exe
2932	b042426e8a30b6ecf6e44f2b21138560N.exe
2932	b042426e8a30b6ecf6e44f2b21138560N.exe
2932	b042426e8a30b6ecf6e44f2b21138560N.exe
2932	b042426e8a30b6ecf6e44f2b21138560N.exe
2932	b042426e8a30b6ecf6e44f2b21138560N.exe
2932	b042426e8a30b6ecf6e44f2b21138560N.exe
2932	b042426e8a30b6ecf6e44f2b21138560N.exe
2932	b042426e8a30b6ecf6e44f2b21138560N.exe
2932	b042426e8a30b6ecf6e44f2b21138560N.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2744	rundll32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2932	b042426e8a30b6ecf6e44f2b21138560N.exe
2744	rundll32.exe
2744	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2932 wrote to memory of 2744	2932	b042426e8a30b6ecf6e44f2b21138560N.exe	30
PID 2932 wrote to memory of 2744	2932	b042426e8a30b6ecf6e44f2b21138560N.exe	30
PID 2932 wrote to memory of 2744	2932	b042426e8a30b6ecf6e44f2b21138560N.exe	30
PID 2932 wrote to memory of 2744	2932	b042426e8a30b6ecf6e44f2b21138560N.exe	30
PID 2932 wrote to memory of 2744	2932	b042426e8a30b6ecf6e44f2b21138560N.exe	30
PID 2932 wrote to memory of 2744	2932	b042426e8a30b6ecf6e44f2b21138560N.exe	30
PID 2932 wrote to memory of 2744	2932	b042426e8a30b6ecf6e44f2b21138560N.exe	30

C:\Users\Admin\AppData\Local\Temp\b042426e8a30b6ecf6e44f2b21138560N.exe
"C:\Users\Admin\AppData\Local\Temp\b042426e8a30b6ecf6e44f2b21138560N.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:2932
- 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:2744

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
78KB

MD5
c5a219f118245bed951796588f5c3810

SHA1
08a7449696f37d7328761752d9ba44cde898efba

SHA256
9f83c9fb07ec7503eb9dc1409ae20176a4dca9334fe220c3134dc79071321759

SHA512
976f810fea22d7261bb9bddedcfff8b163e143fb6b0b6288db73bea0f931f2dd4245a2b22ff724d6ca85048414c691c9264c7bb9e70319276421c07e5392ffe0

Download Submit
\Windows\system\rundll32.exe

Filesize
80KB

MD5
1e2092d5f3f3d884fe671de81e376468

SHA1
b41aa683a6c2c342253a2f5fe49b89520958be3e

SHA256
ba9b9daeb1976999c96a3de51e2f3aaa75eb37d1094020f9c7ae527913899f8f

SHA512
484c55db804e769f1968d835d4d44d9a77d0614ccd44cd2309dcd025685b9b5794820914179636f09c4869eb55b2e38f7fb8683761a03793aa847922d3f7f552

Download Submit
memory/2744-18-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download
memory/2744-22-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download
memory/2932-0-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download
memory/2932-11-0x0000000000260000-0x0000000000276000-memory.dmp

Filesize
88KB

Download
memory/2932-20-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download
memory/2932-21-0x0000000000260000-0x0000000000262000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads