buer | 87d4ae3570608110b899d582e238ddfff0c411be980adb48b1ba7177be2b14ae

General

Target

87d4ae3570608110b899d582e238ddfff0c411be980adb48b1ba7177be2b14ae.exe
Size

35KB
MD5

69c7b8274b687875a08b20311147a9dd
SHA1

9ab047d53100e007c1ef89a0769a949d83d39367
SHA256

87d4ae3570608110b899d582e238ddfff0c411be980adb48b1ba7177be2b14ae
SHA512

fb13c89282524ec99e339d6d94d4fdb8f9e29d39fc72881937229737b7b90b1e3f27652f1e2c16975b08cdd70213dbc8fd092dc37e274dad0a2723dfbcbadd33

Score

10^/10

Family

buer

C2

https://free-soft.cc/

https://free-pc-soft.cc/

Modifies WinLogon for persistence 2 TTPs 2 IoCs

Winlogon Helper DLL

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\ProgramData\\ErrorResponder\\responder.exe\""	responder.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\ProgramData\\ErrorResponder\\responder.exe\""	secinit.exe

Buer Loader 3 IoCs

Detects Buer loader in memory or disk.

resource	yara_rule
behavioral2/files/0x000300000001a0e3-1.dat	buer
behavioral2/files/0x000300000001a0e3-2.dat	buer
behavioral2/memory/2388-4-0x0000000000000000-mapping.dmp	buer

Executes dropped EXE 1 IoCs

pid	Process
3712	responder.exe

Enumerates connected drives 3 TTPs 24 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

Peripheral Device Discovery

System Information Discovery

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2388	secinit.exe
2388	secinit.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 428 wrote to memory of 3712	428	87d4ae3570608110b899d582e238ddfff0c411be980adb48b1ba7177be2b14ae.exe	79
PID 428 wrote to memory of 3712	428	87d4ae3570608110b899d582e238ddfff0c411be980adb48b1ba7177be2b14ae.exe	79
PID 428 wrote to memory of 3712	428	87d4ae3570608110b899d582e238ddfff0c411be980adb48b1ba7177be2b14ae.exe	79
PID 3712 wrote to memory of 2388	3712	responder.exe	80
PID 3712 wrote to memory of 2388	3712	responder.exe	80
PID 3712 wrote to memory of 2388	3712	responder.exe	80
PID 3712 wrote to memory of 2388	3712	responder.exe	80
PID 3712 wrote to memory of 2388	3712	responder.exe	80
PID 3712 wrote to memory of 2388	3712	responder.exe	80
PID 3712 wrote to memory of 2388	3712	responder.exe	80
PID 3712 wrote to memory of 2388	3712	responder.exe	80
PID 3712 wrote to memory of 2388	3712	responder.exe	80
PID 3712 wrote to memory of 2388	3712	responder.exe	80

C:\Users\Admin\AppData\Local\Temp\87d4ae3570608110b899d582e238ddfff0c411be980adb48b1ba7177be2b14ae.exe
"C:\Users\Admin\AppData\Local\Temp\87d4ae3570608110b899d582e238ddfff0c411be980adb48b1ba7177be2b14ae.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:428
- C:\ProgramData\ErrorResponder\responder.exe
  C:\ProgramData\ErrorResponder\responder.exe "C:\Users\Admin\AppData\Local\Temp\87d4ae3570608110b899d582e238ddfff0c411be980adb48b1ba7177be2b14ae.exe" ensgJJ
  2⤵
  - Modifies WinLogon for persistence
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:3712
- - C:\Windows\SysWOW64\secinit.exe
    C:\ProgramData\ErrorResponder\responder.exe
    3⤵
    - Modifies WinLogon for persistence
    - Enumerates connected drives
    - Suspicious behavior: EnumeratesProcesses
    PID:2388