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-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\ProgramData\\ErrorResponder\\responder.exe\""	responder.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\ProgramData\\ErrorResponder\\responder.exe\""	secinit.exe

Buer Loader 5 IoCs

Detects Buer loader in memory or disk.

resource	yara_rule
behavioral1/files/0x000d00000000560a-0.dat	buer
behavioral1/files/0x000d00000000560a-1.dat	buer
behavioral1/files/0x000d00000000560a-3.dat	buer
behavioral1/files/0x000d00000000560a-4.dat	buer
behavioral1/memory/1620-6-0x0000000000000000-mapping.dmp	buer

Executes dropped EXE 1 IoCs

pid	Process
1792	responder.exe

Loads dropped DLL 2 IoCs

pid	Process
1876	87d4ae3570608110b899d582e238ddfff0c411be980adb48b1ba7177be2b14ae.exe
1876	87d4ae3570608110b899d582e238ddfff0c411be980adb48b1ba7177be2b14ae.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 1 IoCs

pid	Process
1620	secinit.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1876 wrote to memory of 1792	1876	87d4ae3570608110b899d582e238ddfff0c411be980adb48b1ba7177be2b14ae.exe	29
PID 1876 wrote to memory of 1792	1876	87d4ae3570608110b899d582e238ddfff0c411be980adb48b1ba7177be2b14ae.exe	29
PID 1876 wrote to memory of 1792	1876	87d4ae3570608110b899d582e238ddfff0c411be980adb48b1ba7177be2b14ae.exe	29
PID 1876 wrote to memory of 1792	1876	87d4ae3570608110b899d582e238ddfff0c411be980adb48b1ba7177be2b14ae.exe	29
PID 1792 wrote to memory of 1620	1792	responder.exe	30
PID 1792 wrote to memory of 1620	1792	responder.exe	30
PID 1792 wrote to memory of 1620	1792	responder.exe	30
PID 1792 wrote to memory of 1620	1792	responder.exe	30
PID 1792 wrote to memory of 1620	1792	responder.exe	30
PID 1792 wrote to memory of 1620	1792	responder.exe	30
PID 1792 wrote to memory of 1620	1792	responder.exe	30
PID 1792 wrote to memory of 1620	1792	responder.exe	30
PID 1792 wrote to memory of 1620	1792	responder.exe	30
PID 1792 wrote to memory of 1620	1792	responder.exe	30
PID 1792 wrote to memory of 1620	1792	responder.exe	30