buer | 825933063c5be4e41f1931b4c818057cd18a42ab0034225740bfed72a9ed4ef4

General

Target

825933063c5be4e41f1931b4c818057cd18a42ab0034225740bfed72a9ed4ef4.exe
Size

1.7MB
MD5

ef942beae72f6d7b660b572327c83e63
SHA1

8a3dbc49f067767eba14991d34eba775bae7c74c
SHA256

825933063c5be4e41f1931b4c818057cd18a42ab0034225740bfed72a9ed4ef4
SHA512

97714e8a60fd09deb535a22a8c3cba190c2a089cb293a22be89117b5c9403266565627d3b8d9055f58019560d6de1db8e1fd615591b40d8eaa042f52f9f849b4

Score

10^/10

buer evasion loader persistence

Malware Config

Extracted

Family

buer

C2

http://lodddd01.info/

http://lodddd02.info/

cook5**gj____+,)diaj*

cook5**gj____+-)diaj*

Signatures

Buer
Buer is a new modular loader first seen in August 2019.
loader buer

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\ProgramData\\UBlockPlugin\\plugin.exe\""	plugin.exe

Buer Loader 8 IoCs

Detects Buer loader in memory or disk.

loader

resource	yara_rule
behavioral2/memory/3484-130-0x000000003FAA0000-0x000000003FEEE000-memory.dmp	buer
behavioral2/memory/3484-132-0x000000003FAA0000-0x000000003FEEE000-memory.dmp	buer
behavioral2/memory/3484-134-0x000000003FAA0000-0x000000003FEEE000-memory.dmp	buer
behavioral2/memory/3484-135-0x000000003FAA0000-0x000000003FEEE000-memory.dmp	buer
behavioral2/memory/3484-139-0x000000003FAA0000-0x000000003FEEE000-memory.dmp	buer
behavioral2/memory/4684-143-0x000000003F3E0000-0x000000003F82E000-memory.dmp	buer
behavioral2/memory/4684-145-0x000000003F3E0000-0x000000003F82E000-memory.dmp	buer
behavioral2/memory/4684-147-0x000000003F3E0000-0x000000003F82E000-memory.dmp	buer

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 2 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	plugin.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	825933063c5be4e41f1931b4c818057cd18a42ab0034225740bfed72a9ed4ef4.exe

Executes dropped EXE 1 IoCs

pid	Process
4684	plugin.exe

Checks BIOS information in registry 2 TTPs 4 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	825933063c5be4e41f1931b4c818057cd18a42ab0034225740bfed72a9ed4ef4.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	825933063c5be4e41f1931b4c818057cd18a42ab0034225740bfed72a9ed4ef4.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	plugin.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	plugin.exe

Identifies Wine through registry keys 2 TTPs 2 IoCs

Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Wine	825933063c5be4e41f1931b4c818057cd18a42ab0034225740bfed72a9ed4ef4.exe
Key opened	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Wine	plugin.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3484	825933063c5be4e41f1931b4c818057cd18a42ab0034225740bfed72a9ed4ef4.exe
4684	plugin.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
2612	4476	WerFault.exe	80
3700	4684	WerFault.exe	79

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3484	825933063c5be4e41f1931b4c818057cd18a42ab0034225740bfed72a9ed4ef4.exe
3484	825933063c5be4e41f1931b4c818057cd18a42ab0034225740bfed72a9ed4ef4.exe
4684	plugin.exe
4684	plugin.exe
4684	plugin.exe
4684	plugin.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3484 wrote to memory of 4684	3484	825933063c5be4e41f1931b4c818057cd18a42ab0034225740bfed72a9ed4ef4.exe	79
PID 3484 wrote to memory of 4684	3484	825933063c5be4e41f1931b4c818057cd18a42ab0034225740bfed72a9ed4ef4.exe	79
PID 3484 wrote to memory of 4684	3484	825933063c5be4e41f1931b4c818057cd18a42ab0034225740bfed72a9ed4ef4.exe	79
PID 4684 wrote to memory of 4476	4684	plugin.exe	80
PID 4684 wrote to memory of 4476	4684	plugin.exe	80
PID 4684 wrote to memory of 4476	4684	plugin.exe	80
PID 4684 wrote to memory of 4476	4684	plugin.exe	80
PID 4684 wrote to memory of 4476	4684	plugin.exe	80
PID 4684 wrote to memory of 4476	4684	plugin.exe	80
PID 4684 wrote to memory of 4476	4684	plugin.exe	80
PID 4684 wrote to memory of 4476	4684	plugin.exe	80
PID 4684 wrote to memory of 4476	4684	plugin.exe	80
PID 4684 wrote to memory of 4476	4684	plugin.exe	80
PID 4684 wrote to memory of 4476	4684	plugin.exe	80
PID 4684 wrote to memory of 4476	4684	plugin.exe	80

C:\Users\Admin\AppData\Local\Temp\825933063c5be4e41f1931b4c818057cd18a42ab0034225740bfed72a9ed4ef4.exe
"C:\Users\Admin\AppData\Local\Temp\825933063c5be4e41f1931b4c818057cd18a42ab0034225740bfed72a9ed4ef4.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3484
- C:\ProgramData\UBlockPlugin\plugin.exe
  C:\ProgramData\UBlockPlugin\plugin.exe "C:\Users\Admin\AppData\Local\Temp\825933063c5be4e41f1931b4c818057cd18a42ab0034225740bfed72a9ed4ef4.exe" ensgJJ
  2⤵
  - Modifies WinLogon for persistence
  - Identifies VirtualBox via ACPI registry values (likely anti-VM)
  - Executes dropped EXE
  - Checks BIOS information in registry
  - Identifies Wine through registry keys
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4684
- - C:\Windows\SysWOW64\secinit.exe
    C:\ProgramData\UBlockPlugin\plugin.exe
    3⤵
    PID:4476
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4476 -s 220
      4⤵
      Program crash
      PID:2612
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4684 -s 772
    3⤵
    - Program crash
    PID:3700

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4476 -ip 4476
1⤵
PID:824

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 4684 -ip 4684
1⤵
PID:4968

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Virtualization/Sandbox Evasion

2

T1497

Credential Access

Discovery

Query Registry

3

T1012

System Information Discovery

1

T1082

Virtualization/Sandbox Evasion

2

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\UBlockPlugin\plugin.exe

Filesize
1.7MB

MD5
ef942beae72f6d7b660b572327c83e63

SHA1
8a3dbc49f067767eba14991d34eba775bae7c74c

SHA256
825933063c5be4e41f1931b4c818057cd18a42ab0034225740bfed72a9ed4ef4

SHA512
97714e8a60fd09deb535a22a8c3cba190c2a089cb293a22be89117b5c9403266565627d3b8d9055f58019560d6de1db8e1fd615591b40d8eaa042f52f9f849b4

Download Submit
C:\ProgramData\UBlockPlugin\plugin.exe

Filesize
1.7MB

MD5
ef942beae72f6d7b660b572327c83e63

SHA1
8a3dbc49f067767eba14991d34eba775bae7c74c

SHA256
825933063c5be4e41f1931b4c818057cd18a42ab0034225740bfed72a9ed4ef4

SHA512
97714e8a60fd09deb535a22a8c3cba190c2a089cb293a22be89117b5c9403266565627d3b8d9055f58019560d6de1db8e1fd615591b40d8eaa042f52f9f849b4

Download Submit
memory/3484-134-0x000000003FAA0000-0x000000003FEEE000-memory.dmp

Filesize
4.3MB

Download
memory/3484-130-0x000000003FAA0000-0x000000003FEEE000-memory.dmp

Filesize
4.3MB

Download
memory/3484-135-0x000000003FAA0000-0x000000003FEEE000-memory.dmp

Filesize
4.3MB

Download
memory/3484-133-0x00000000776B0000-0x0000000077853000-memory.dmp

Filesize
1.6MB

Download
memory/3484-132-0x000000003FAA0000-0x000000003FEEE000-memory.dmp

Filesize
4.3MB

Download
memory/3484-131-0x00000000776B0000-0x0000000077853000-memory.dmp

Filesize
1.6MB

Download
memory/3484-139-0x000000003FAA0000-0x000000003FEEE000-memory.dmp

Filesize
4.3MB

Download
memory/3484-140-0x00000000776B0000-0x0000000077853000-memory.dmp

Filesize
1.6MB

Download
memory/4684-142-0x00000000776B0000-0x0000000077853000-memory.dmp

Filesize
1.6MB

Download
memory/4684-143-0x000000003F3E0000-0x000000003F82E000-memory.dmp

Filesize
4.3MB

Download
memory/4684-141-0x000000003F3E0000-0x000000003F82E000-memory.dmp

Filesize
4.3MB

Download
memory/4684-145-0x000000003F3E0000-0x000000003F82E000-memory.dmp

Filesize
4.3MB

Download
memory/4684-146-0x00000000776B0000-0x0000000077853000-memory.dmp

Filesize
1.6MB

Download
memory/4684-147-0x000000003F3E0000-0x000000003F82E000-memory.dmp

Filesize
4.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads