buer | 796e1936b00307eb5d0b6af571ca8dfda475be4a4dfaacac4aa72bc1c5741aa6

General

Target

796e1936b00307eb5d0b6af571ca8dfda475be4a4dfaacac4aa72bc1c5741aa6.exe
Size

1.7MB
MD5

d88f42698d2195f61bedb72ce885a758
SHA1

a7854723c51857ab0e958108be18331aa3ff8fe6
SHA256

796e1936b00307eb5d0b6af571ca8dfda475be4a4dfaacac4aa72bc1c5741aa6
SHA512

6be3825bed91188e6729f70fec9ac182ca9ecbdcfef970643665a1ebba9c160cfb68ae3685ce38f455b729c63c8cd2da56bf32881fe0181a4729bfbedc22d752

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-1-5-21-790309383-526510583-3802439154-1000\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/240-60-0x000000003FAB0000-0x000000003FEFE000-memory.dmp	buer
behavioral1/memory/1160-65-0x000000003F4B0000-0x000000003F8FE000-memory.dmp	buer
behavioral1/memory/1160-79-0x000000003F4B0000-0x000000003F8FE000-memory.dmp	buer
behavioral1/memory/1160-80-0x000000003F4B0000-0x000000003F8FE000-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__	796e1936b00307eb5d0b6af571ca8dfda475be4a4dfaacac4aa72bc1c5741aa6.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	plugin.exe

Executes dropped EXE 1 IoCs

pid	Process
1160	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\VideoBiosVersion	plugin.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	796e1936b00307eb5d0b6af571ca8dfda475be4a4dfaacac4aa72bc1c5741aa6.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	796e1936b00307eb5d0b6af571ca8dfda475be4a4dfaacac4aa72bc1c5741aa6.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	plugin.exe

Deletes itself 1 IoCs

pid	Process
1160	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-1-5-21-790309383-526510583-3802439154-1000\Software\Wine	796e1936b00307eb5d0b6af571ca8dfda475be4a4dfaacac4aa72bc1c5741aa6.exe
Key opened	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Wine	plugin.exe

Loads dropped DLL 2 IoCs

pid	Process
240	796e1936b00307eb5d0b6af571ca8dfda475be4a4dfaacac4aa72bc1c5741aa6.exe
240	796e1936b00307eb5d0b6af571ca8dfda475be4a4dfaacac4aa72bc1c5741aa6.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
240	796e1936b00307eb5d0b6af571ca8dfda475be4a4dfaacac4aa72bc1c5741aa6.exe
1160	plugin.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
328	608	WerFault.exe	28
1932	1160	WerFault.exe	27

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
240	796e1936b00307eb5d0b6af571ca8dfda475be4a4dfaacac4aa72bc1c5741aa6.exe
1160	plugin.exe
1160	plugin.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 240 wrote to memory of 1160	240	796e1936b00307eb5d0b6af571ca8dfda475be4a4dfaacac4aa72bc1c5741aa6.exe	27
PID 240 wrote to memory of 1160	240	796e1936b00307eb5d0b6af571ca8dfda475be4a4dfaacac4aa72bc1c5741aa6.exe	27
PID 240 wrote to memory of 1160	240	796e1936b00307eb5d0b6af571ca8dfda475be4a4dfaacac4aa72bc1c5741aa6.exe	27
PID 240 wrote to memory of 1160	240	796e1936b00307eb5d0b6af571ca8dfda475be4a4dfaacac4aa72bc1c5741aa6.exe	27
PID 1160 wrote to memory of 608	1160	plugin.exe	28
PID 1160 wrote to memory of 608	1160	plugin.exe	28
PID 1160 wrote to memory of 608	1160	plugin.exe	28
PID 1160 wrote to memory of 608	1160	plugin.exe	28
PID 1160 wrote to memory of 608	1160	plugin.exe	28
PID 1160 wrote to memory of 608	1160	plugin.exe	28
PID 1160 wrote to memory of 608	1160	plugin.exe	28
PID 1160 wrote to memory of 608	1160	plugin.exe	28
PID 1160 wrote to memory of 608	1160	plugin.exe	28
PID 1160 wrote to memory of 608	1160	plugin.exe	28
PID 1160 wrote to memory of 608	1160	plugin.exe	28
PID 1160 wrote to memory of 608	1160	plugin.exe	28
PID 1160 wrote to memory of 608	1160	plugin.exe	28
PID 608 wrote to memory of 328	608	secinit.exe	29
PID 608 wrote to memory of 328	608	secinit.exe	29
PID 608 wrote to memory of 328	608	secinit.exe	29
PID 608 wrote to memory of 328	608	secinit.exe	29
PID 1160 wrote to memory of 1932	1160	plugin.exe	30
PID 1160 wrote to memory of 1932	1160	plugin.exe	30
PID 1160 wrote to memory of 1932	1160	plugin.exe	30
PID 1160 wrote to memory of 1932	1160	plugin.exe	30

C:\Users\Admin\AppData\Local\Temp\796e1936b00307eb5d0b6af571ca8dfda475be4a4dfaacac4aa72bc1c5741aa6.exe
"C:\Users\Admin\AppData\Local\Temp\796e1936b00307eb5d0b6af571ca8dfda475be4a4dfaacac4aa72bc1c5741aa6.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:240
- C:\ProgramData\UBlockPlugin\plugin.exe
  C:\ProgramData\UBlockPlugin\plugin.exe "C:\Users\Admin\AppData\Local\Temp\796e1936b00307eb5d0b6af571ca8dfda475be4a4dfaacac4aa72bc1c5741aa6.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:1160
- - C:\Windows\SysWOW64\secinit.exe
    C:\ProgramData\UBlockPlugin\plugin.exe
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:608
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 608 -s 136
      4⤵
      Program crash
      PID:328
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1160 -s 564
    3⤵
    - Program crash
    PID:1932

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
d88f42698d2195f61bedb72ce885a758

SHA1
a7854723c51857ab0e958108be18331aa3ff8fe6

SHA256
796e1936b00307eb5d0b6af571ca8dfda475be4a4dfaacac4aa72bc1c5741aa6

SHA512
6be3825bed91188e6729f70fec9ac182ca9ecbdcfef970643665a1ebba9c160cfb68ae3685ce38f455b729c63c8cd2da56bf32881fe0181a4729bfbedc22d752

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

Filesize
1.7MB

MD5
d88f42698d2195f61bedb72ce885a758

SHA1
a7854723c51857ab0e958108be18331aa3ff8fe6

SHA256
796e1936b00307eb5d0b6af571ca8dfda475be4a4dfaacac4aa72bc1c5741aa6

SHA512
6be3825bed91188e6729f70fec9ac182ca9ecbdcfef970643665a1ebba9c160cfb68ae3685ce38f455b729c63c8cd2da56bf32881fe0181a4729bfbedc22d752

Download Submit
\ProgramData\UBlockPlugin\plugin.exe

Filesize
1.7MB

MD5
d88f42698d2195f61bedb72ce885a758

SHA1
a7854723c51857ab0e958108be18331aa3ff8fe6

SHA256
796e1936b00307eb5d0b6af571ca8dfda475be4a4dfaacac4aa72bc1c5741aa6

SHA512
6be3825bed91188e6729f70fec9ac182ca9ecbdcfef970643665a1ebba9c160cfb68ae3685ce38f455b729c63c8cd2da56bf32881fe0181a4729bfbedc22d752

Download Submit
\ProgramData\UBlockPlugin\plugin.exe

Filesize
1.7MB

MD5
d88f42698d2195f61bedb72ce885a758

SHA1
a7854723c51857ab0e958108be18331aa3ff8fe6

SHA256
796e1936b00307eb5d0b6af571ca8dfda475be4a4dfaacac4aa72bc1c5741aa6

SHA512
6be3825bed91188e6729f70fec9ac182ca9ecbdcfef970643665a1ebba9c160cfb68ae3685ce38f455b729c63c8cd2da56bf32881fe0181a4729bfbedc22d752

Download Submit
memory/240-55-0x00000000757C1000-0x00000000757C3000-memory.dmp

Filesize
8KB

Download
memory/240-60-0x000000003FAB0000-0x000000003FEFE000-memory.dmp

Filesize
4.3MB

Download
memory/240-61-0x0000000077940000-0x0000000077AC0000-memory.dmp

Filesize
1.5MB

Download
memory/240-54-0x000000003FAB0000-0x000000003FEFE000-memory.dmp

Filesize
4.3MB

Download
memory/608-67-0x0000000000200000-0x000000000064E000-memory.dmp

Filesize
4.3MB

Download
memory/608-72-0x0000000000200000-0x000000000064E000-memory.dmp

Filesize
4.3MB

Download
memory/608-66-0x0000000000200000-0x000000000064E000-memory.dmp

Filesize
4.3MB

Download
memory/608-69-0x0000000000200000-0x000000000064E000-memory.dmp

Filesize
4.3MB

Download
memory/608-71-0x0000000000200000-0x000000000064E000-memory.dmp

Filesize
4.3MB

Download
memory/608-70-0x0000000000200000-0x000000000064E000-memory.dmp

Filesize
4.3MB

Download
memory/608-75-0x0000000000080000-0x0000000000081000-memory.dmp

Filesize
4KB

Download
memory/608-74-0x0000000000200000-0x000000000064E000-memory.dmp

Filesize
4.3MB

Download
memory/1160-65-0x000000003F4B0000-0x000000003F8FE000-memory.dmp

Filesize
4.3MB

Download
memory/1160-62-0x000000003F4B0000-0x000000003F8FE000-memory.dmp

Filesize
4.3MB

Download
memory/1160-79-0x000000003F4B0000-0x000000003F8FE000-memory.dmp

Filesize
4.3MB

Download
memory/1160-80-0x000000003F4B0000-0x000000003F8FE000-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