buer | 6d4500bced3441879c63efbdc73e4742e111f011627343b8f3f607101668ac5c

General

Target

6d4500bced3441879c63efbdc73e4742e111f011627343b8f3f607101668ac5c.exe
Size

1.7MB
MD5

32855c905d8fc616ee5feb354820ba97
SHA1

92178e3e2294a39588571e165393b18e1867ab5b
SHA256

6d4500bced3441879c63efbdc73e4742e111f011627343b8f3f607101668ac5c
SHA512

eee2b54bf408286784f4b9c8be49035227238cc7a804a4c60edd42b480a6527b0a217fa354cbe588e059c8c3a1dde9f2afd5d3b0f6fbbea107d08d1a6e1c3ca9

Score

10^/10

buer evasion loader persistence

Malware Config

Extracted

Family

buer

C2

http://lodddd01.info/

http://lodddd02.info/

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-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\ProgramData\\UBlockPlugin\\plugin.exe\""	plugin.exe

Buer Loader 4 IoCs

Detects Buer loader in memory or disk.

loader

resource	yara_rule
behavioral1/memory/1992-60-0x000000003F8C0000-0x000000003FD09000-memory.dmp	buer
behavioral1/memory/1792-64-0x000000003FA80000-0x000000003FEC9000-memory.dmp	buer
behavioral1/memory/1792-66-0x000000003FA80000-0x000000003FEC9000-memory.dmp	buer
behavioral1/memory/1792-68-0x000000003FA80000-0x000000003FEC9000-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__	6d4500bced3441879c63efbdc73e4742e111f011627343b8f3f607101668ac5c.exe

Executes dropped EXE 1 IoCs

pid	Process
1792	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	6d4500bced3441879c63efbdc73e4742e111f011627343b8f3f607101668ac5c.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	6d4500bced3441879c63efbdc73e4742e111f011627343b8f3f607101668ac5c.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	plugin.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	plugin.exe

Deletes itself 1 IoCs

pid	Process
1792	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-1-5-21-1083475884-596052423-1669053738-1000\Software\Wine	6d4500bced3441879c63efbdc73e4742e111f011627343b8f3f607101668ac5c.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Wine	plugin.exe

Loads dropped DLL 2 IoCs

pid	Process
1992	6d4500bced3441879c63efbdc73e4742e111f011627343b8f3f607101668ac5c.exe
1992	6d4500bced3441879c63efbdc73e4742e111f011627343b8f3f607101668ac5c.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1992	6d4500bced3441879c63efbdc73e4742e111f011627343b8f3f607101668ac5c.exe
1792	plugin.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
976	1792	WerFault.exe	27

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1992	6d4500bced3441879c63efbdc73e4742e111f011627343b8f3f607101668ac5c.exe
1792	plugin.exe
1792	plugin.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1992 wrote to memory of 1792	1992	6d4500bced3441879c63efbdc73e4742e111f011627343b8f3f607101668ac5c.exe	27
PID 1992 wrote to memory of 1792	1992	6d4500bced3441879c63efbdc73e4742e111f011627343b8f3f607101668ac5c.exe	27
PID 1992 wrote to memory of 1792	1992	6d4500bced3441879c63efbdc73e4742e111f011627343b8f3f607101668ac5c.exe	27
PID 1992 wrote to memory of 1792	1992	6d4500bced3441879c63efbdc73e4742e111f011627343b8f3f607101668ac5c.exe	27
PID 1792 wrote to memory of 752	1792	plugin.exe	28
PID 1792 wrote to memory of 752	1792	plugin.exe	28
PID 1792 wrote to memory of 752	1792	plugin.exe	28
PID 1792 wrote to memory of 752	1792	plugin.exe	28
PID 1792 wrote to memory of 976	1792	plugin.exe	29
PID 1792 wrote to memory of 976	1792	plugin.exe	29
PID 1792 wrote to memory of 976	1792	plugin.exe	29
PID 1792 wrote to memory of 976	1792	plugin.exe	29

C:\Users\Admin\AppData\Local\Temp\6d4500bced3441879c63efbdc73e4742e111f011627343b8f3f607101668ac5c.exe
"C:\Users\Admin\AppData\Local\Temp\6d4500bced3441879c63efbdc73e4742e111f011627343b8f3f607101668ac5c.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1992
- C:\ProgramData\UBlockPlugin\plugin.exe
  C:\ProgramData\UBlockPlugin\plugin.exe "C:\Users\Admin\AppData\Local\Temp\6d4500bced3441879c63efbdc73e4742e111f011627343b8f3f607101668ac5c.exe" ensgJJ
  2⤵
  - Modifies WinLogon for persistence
  - Identifies VirtualBox via ACPI registry values (likely anti-VM)
  - Executes dropped EXE
  - Checks BIOS information in registry
  - Deletes itself
  - Identifies Wine through registry keys
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1792
- - C:\Windows\SysWOW64\secinit.exe
    C:\ProgramData\UBlockPlugin\plugin.exe
    3⤵
    PID:752
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1792 -s 556
    3⤵
    - Program crash
    PID:976

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
32855c905d8fc616ee5feb354820ba97

SHA1
92178e3e2294a39588571e165393b18e1867ab5b

SHA256
6d4500bced3441879c63efbdc73e4742e111f011627343b8f3f607101668ac5c

SHA512
eee2b54bf408286784f4b9c8be49035227238cc7a804a4c60edd42b480a6527b0a217fa354cbe588e059c8c3a1dde9f2afd5d3b0f6fbbea107d08d1a6e1c3ca9

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

Filesize
1.7MB

MD5
32855c905d8fc616ee5feb354820ba97

SHA1
92178e3e2294a39588571e165393b18e1867ab5b

SHA256
6d4500bced3441879c63efbdc73e4742e111f011627343b8f3f607101668ac5c

SHA512
eee2b54bf408286784f4b9c8be49035227238cc7a804a4c60edd42b480a6527b0a217fa354cbe588e059c8c3a1dde9f2afd5d3b0f6fbbea107d08d1a6e1c3ca9

Download Submit
\ProgramData\UBlockPlugin\plugin.exe

Filesize
1.7MB

MD5
32855c905d8fc616ee5feb354820ba97

SHA1
92178e3e2294a39588571e165393b18e1867ab5b

SHA256
6d4500bced3441879c63efbdc73e4742e111f011627343b8f3f607101668ac5c

SHA512
eee2b54bf408286784f4b9c8be49035227238cc7a804a4c60edd42b480a6527b0a217fa354cbe588e059c8c3a1dde9f2afd5d3b0f6fbbea107d08d1a6e1c3ca9

Download Submit
\ProgramData\UBlockPlugin\plugin.exe

Filesize
1.7MB

MD5
32855c905d8fc616ee5feb354820ba97

SHA1
92178e3e2294a39588571e165393b18e1867ab5b

SHA256
6d4500bced3441879c63efbdc73e4742e111f011627343b8f3f607101668ac5c

SHA512
eee2b54bf408286784f4b9c8be49035227238cc7a804a4c60edd42b480a6527b0a217fa354cbe588e059c8c3a1dde9f2afd5d3b0f6fbbea107d08d1a6e1c3ca9

Download Submit
memory/1792-64-0x000000003FA80000-0x000000003FEC9000-memory.dmp

Filesize
4.3MB

Download
memory/1792-62-0x000000003FA80000-0x000000003FEC9000-memory.dmp

Filesize
4.3MB

Download
memory/1792-66-0x000000003FA80000-0x000000003FEC9000-memory.dmp

Filesize
4.3MB

Download
memory/1792-67-0x0000000077900000-0x0000000077A80000-memory.dmp

Filesize
1.5MB

Download
memory/1792-68-0x000000003FA80000-0x000000003FEC9000-memory.dmp

Filesize
4.3MB

Download
memory/1992-61-0x0000000077900000-0x0000000077A80000-memory.dmp

Filesize
1.5MB

Download
memory/1992-60-0x000000003F8C0000-0x000000003FD09000-memory.dmp

Filesize
4.3MB

Download
memory/1992-54-0x000000003F8C0000-0x000000003FD09000-memory.dmp

Filesize
4.3MB

Download
memory/1992-55-0x0000000075381000-0x0000000075383000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads