buer | 5ba2402e13843c844a0f2204aa72736f146cf1a8c9d1d569fa2379d21f86ef0f

Analysis

max time kernel
152s
max time network
172s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
01/07/2022, 04:00

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
5ba2402e13843c844a0f2204aa72736f146cf1a8c9d1d569fa2379d21f86ef0f.exe
Size 1.7MB
Sample220701-ek4dbsdaa8
SHA256 5ba2402e13843c844a0f2204aa72736f146cf1a8c9d1d569fa2379d21f86ef0f
MD5 cd8e0ff55fdfb32912795718b6b1542f
SHA1 ce9875fef041ebc5248eb41dfd3201ea4e5da76b
SHA512 4d36912e5ed28e037a5b63ffc95a50118c83ad244909a8e4e2c0d281bd1396903d2df6b0e48b4fd4f44d0a24f8b0e01f1d9b892c0ca591e98e7219351df10450
MD5 SHA1 SHA512

Score

10^/10

buer evasion loader persistence

Malware Config

Extracted

Family

buer

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 5 IoCs

Detects Buer loader in memory or disk.

loader

resource	yara_rule
behavioral2/memory/4348-134-0x000000003FC30000-0x0000000040095000-memory.dmp	buer
behavioral2/memory/3564-138-0x000000003FE70000-0x00000000402D5000-memory.dmp	buer
behavioral2/memory/3564-139-0x000000003FE70000-0x00000000402D5000-memory.dmp	buer
behavioral2/memory/3564-141-0x000000003FE70000-0x00000000402D5000-memory.dmp	buer
behavioral2/memory/3564-143-0x000000003FE70000-0x00000000402D5000-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__	5ba2402e13843c844a0f2204aa72736f146cf1a8c9d1d569fa2379d21f86ef0f.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	plugin.exe

Executes dropped EXE 1 IoCs

pid	Process
3564	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	5ba2402e13843c844a0f2204aa72736f146cf1a8c9d1d569fa2379d21f86ef0f.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	5ba2402e13843c844a0f2204aa72736f146cf1a8c9d1d569fa2379d21f86ef0f.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	5ba2402e13843c844a0f2204aa72736f146cf1a8c9d1d569fa2379d21f86ef0f.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
4348	5ba2402e13843c844a0f2204aa72736f146cf1a8c9d1d569fa2379d21f86ef0f.exe
3564	plugin.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
1656	1480	WerFault.exe	80
4456	3564	WerFault.exe	79

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4348	5ba2402e13843c844a0f2204aa72736f146cf1a8c9d1d569fa2379d21f86ef0f.exe
4348	5ba2402e13843c844a0f2204aa72736f146cf1a8c9d1d569fa2379d21f86ef0f.exe
3564	plugin.exe
3564	plugin.exe
3564	plugin.exe
3564	plugin.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4348 wrote to memory of 3564	4348	5ba2402e13843c844a0f2204aa72736f146cf1a8c9d1d569fa2379d21f86ef0f.exe	79
PID 4348 wrote to memory of 3564	4348	5ba2402e13843c844a0f2204aa72736f146cf1a8c9d1d569fa2379d21f86ef0f.exe	79
PID 4348 wrote to memory of 3564	4348	5ba2402e13843c844a0f2204aa72736f146cf1a8c9d1d569fa2379d21f86ef0f.exe	79
PID 3564 wrote to memory of 1480	3564	plugin.exe	80
PID 3564 wrote to memory of 1480	3564	plugin.exe	80
PID 3564 wrote to memory of 1480	3564	plugin.exe	80
PID 3564 wrote to memory of 1480	3564	plugin.exe	80
PID 3564 wrote to memory of 1480	3564	plugin.exe	80
PID 3564 wrote to memory of 1480	3564	plugin.exe	80
PID 3564 wrote to memory of 1480	3564	plugin.exe	80
PID 3564 wrote to memory of 1480	3564	plugin.exe	80
PID 3564 wrote to memory of 1480	3564	plugin.exe	80
PID 3564 wrote to memory of 1480	3564	plugin.exe	80
PID 3564 wrote to memory of 1480	3564	plugin.exe	80
PID 3564 wrote to memory of 1480	3564	plugin.exe	80

C:\Users\Admin\AppData\Local\Temp\5ba2402e13843c844a0f2204aa72736f146cf1a8c9d1d569fa2379d21f86ef0f.exe
"C:\Users\Admin\AppData\Local\Temp\5ba2402e13843c844a0f2204aa72736f146cf1a8c9d1d569fa2379d21f86ef0f.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:4348
- C:\ProgramData\UBlockPlugin\plugin.exe
  C:\ProgramData\UBlockPlugin\plugin.exe "C:\Users\Admin\AppData\Local\Temp\5ba2402e13843c844a0f2204aa72736f146cf1a8c9d1d569fa2379d21f86ef0f.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:3564
- - C:\Windows\SysWOW64\secinit.exe
    C:\ProgramData\UBlockPlugin\plugin.exe
    3⤵
    PID:1480
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1480 -s 220
      4⤵
      Program crash
      PID:1656
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3564 -s 1156
    3⤵
    - Program crash
    PID:4456

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 1480 -ip 1480
1⤵
PID:4168

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 3564 -ip 3564
1⤵
PID:2592

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

plugin.exe

Path C:\ProgramData\UBlockPlugin\plugin.exe
Size 1.7MB
SHA256 5ba2402e13843c844a0f2204aa72736f146cf1a8c9d1d569fa2379d21f86ef0f
MD5 cd8e0ff55fdfb32912795718b6b1542f
SHA1 ce9875fef041ebc5248eb41dfd3201ea4e5da76b
SHA512 4d36912e5ed28e037a5b63ffc95a50118c83ad244909a8e4e2c0d281bd1396903d2df6b0e48b4fd4f44d0a24f8b0e01f1d9b892c0ca591e98e7219351df10450
SSDEEP 49152:VuSW5w/Hu/biFKeRoy9joJXe8FbxcJNjtsvkA82:cSWN/bgxYF1qjtsvV82
MD5 SHA1 SHA512 SSDEEP

Submit Download

plugin.exe

Path C:\ProgramData\UBlockPlugin\plugin.exe
Size 1.7MB
SHA256 5ba2402e13843c844a0f2204aa72736f146cf1a8c9d1d569fa2379d21f86ef0f
MD5 cd8e0ff55fdfb32912795718b6b1542f
SHA1 ce9875fef041ebc5248eb41dfd3201ea4e5da76b
SHA512 4d36912e5ed28e037a5b63ffc95a50118c83ad244909a8e4e2c0d281bd1396903d2df6b0e48b4fd4f44d0a24f8b0e01f1d9b892c0ca591e98e7219351df10450
SSDEEP 49152:VuSW5w/Hu/biFKeRoy9joJXe8FbxcJNjtsvkA82:cSWN/bgxYF1qjtsvV82
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/3564-136-0x000000003FE70000-0x00000000402D5000-memory.dmp

Download

memory/3564-137-0x0000000077440000-0x00000000775E3000-memory.dmp

Download

memory/3564-138-0x000000003FE70000-0x00000000402D5000-memory.dmp

Download

memory/3564-139-0x000000003FE70000-0x00000000402D5000-memory.dmp

Download

memory/3564-140-0x0000000077440000-0x00000000775E3000-memory.dmp

Download

memory/3564-141-0x000000003FE70000-0x00000000402D5000-memory.dmp

Download

memory/3564-143-0x000000003FE70000-0x00000000402D5000-memory.dmp

Download

memory/3564-144-0x0000000077440000-0x00000000775E3000-memory.dmp

Download

memory/4348-134-0x000000003FC30000-0x0000000040095000-memory.dmp

Download

memory/4348-135-0x0000000077440000-0x00000000775E3000-memory.dmp

Download

memory/4348-130-0x000000003FC30000-0x0000000040095000-memory.dmp

Download