buer | 0807f543bc8322a5c55739c0a46aa8912feb5d3c8785b36188f9eb9e8b5e6af0

General

Target

0807f543bc8322a5c55739c0a46aa8912feb5d3c8785b36188f9eb9e8b5e6af0.exe
Size

1.7MB
MD5

3e397d12e8dc5a6194c6c275977f8bba
SHA1

2aa3297e700208a43cad912c69aa5ff1f9435bce
SHA256

0807f543bc8322a5c55739c0a46aa8912feb5d3c8785b36188f9eb9e8b5e6af0
SHA512

6f0fba2a65073e0e8f526c4bfd0a24ae130a68c3f21b49595afc2bd4fd9c7d9f4661312f356011fae3ee626ffcb2ca364046e7fbc947f90d11719593a2ba9453

Score

10^/10

buer evasion loader

Malware Config

Extracted

Family

buer

C2

https://loddd01.info/

https://loddd02.info/

Signatures

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

Buer Loader 7 IoCs

Detects Buer loader in memory or disk.

loader

resource	yara_rule
behavioral2/memory/4448-132-0x000000003FAA0000-0x000000003FF00000-memory.dmp	buer
behavioral2/memory/4448-133-0x000000003FAA0000-0x000000003FF00000-memory.dmp	buer
behavioral2/memory/4448-134-0x000000003FAA0000-0x000000003FF00000-memory.dmp	buer
behavioral2/memory/4448-138-0x000000003FAA0000-0x000000003FF00000-memory.dmp	buer
behavioral2/memory/4188-142-0x000000003F840000-0x000000003FCA0000-memory.dmp	buer
behavioral2/memory/4188-143-0x000000003F840000-0x000000003FCA0000-memory.dmp	buer
behavioral2/memory/4188-144-0x000000003F840000-0x000000003FCA0000-memory.dmp	buer

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

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Executes dropped EXE 1 IoCs

pid	Process
4188	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	0807f543bc8322a5c55739c0a46aa8912feb5d3c8785b36188f9eb9e8b5e6af0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	0807f543bc8322a5c55739c0a46aa8912feb5d3c8785b36188f9eb9e8b5e6af0.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-1-5-21-1081944012-3634099177-1681222835-1000\Software\Wine	0807f543bc8322a5c55739c0a46aa8912feb5d3c8785b36188f9eb9e8b5e6af0.exe
Key opened	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Software\Wine	plugin.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4448	0807f543bc8322a5c55739c0a46aa8912feb5d3c8785b36188f9eb9e8b5e6af0.exe
4188	plugin.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3032	4820	WerFault.exe	89

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4448	0807f543bc8322a5c55739c0a46aa8912feb5d3c8785b36188f9eb9e8b5e6af0.exe
4448	0807f543bc8322a5c55739c0a46aa8912feb5d3c8785b36188f9eb9e8b5e6af0.exe
4188	plugin.exe
4188	plugin.exe
4188	plugin.exe
4188	plugin.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4448 wrote to memory of 4188	4448	0807f543bc8322a5c55739c0a46aa8912feb5d3c8785b36188f9eb9e8b5e6af0.exe	88
PID 4448 wrote to memory of 4188	4448	0807f543bc8322a5c55739c0a46aa8912feb5d3c8785b36188f9eb9e8b5e6af0.exe	88
PID 4448 wrote to memory of 4188	4448	0807f543bc8322a5c55739c0a46aa8912feb5d3c8785b36188f9eb9e8b5e6af0.exe	88
PID 4188 wrote to memory of 4820	4188	plugin.exe	89
PID 4188 wrote to memory of 4820	4188	plugin.exe	89
PID 4188 wrote to memory of 4820	4188	plugin.exe	89
PID 4188 wrote to memory of 4820	4188	plugin.exe	89
PID 4188 wrote to memory of 4820	4188	plugin.exe	89
PID 4188 wrote to memory of 4820	4188	plugin.exe	89
PID 4188 wrote to memory of 4820	4188	plugin.exe	89
PID 4188 wrote to memory of 4820	4188	plugin.exe	89
PID 4188 wrote to memory of 4820	4188	plugin.exe	89
PID 4188 wrote to memory of 4820	4188	plugin.exe	89
PID 4188 wrote to memory of 4820	4188	plugin.exe	89

C:\Users\Admin\AppData\Local\Temp\0807f543bc8322a5c55739c0a46aa8912feb5d3c8785b36188f9eb9e8b5e6af0.exe
"C:\Users\Admin\AppData\Local\Temp\0807f543bc8322a5c55739c0a46aa8912feb5d3c8785b36188f9eb9e8b5e6af0.exe"
1⤵
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4448
- C:\ProgramData\UBlockPlugin\plugin.exe
  C:\ProgramData\UBlockPlugin\plugin.exe "C:\Users\Admin\AppData\Local\Temp\0807f543bc8322a5c55739c0a46aa8912feb5d3c8785b36188f9eb9e8b5e6af0.exe" ensgJJ
  2⤵
  - 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:4188
- - C:\Windows\SysWOW64\secinit.exe
    C:\ProgramData\UBlockPlugin\plugin.exe
    3⤵
    PID:4820
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4820 -s 220
      4⤵
      Program crash
      PID:3032

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 4820 -ip 4820
1⤵
PID:4496

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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
3e397d12e8dc5a6194c6c275977f8bba

SHA1
2aa3297e700208a43cad912c69aa5ff1f9435bce

SHA256
0807f543bc8322a5c55739c0a46aa8912feb5d3c8785b36188f9eb9e8b5e6af0

SHA512
6f0fba2a65073e0e8f526c4bfd0a24ae130a68c3f21b49595afc2bd4fd9c7d9f4661312f356011fae3ee626ffcb2ca364046e7fbc947f90d11719593a2ba9453

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

Filesize
1.7MB

MD5
3e397d12e8dc5a6194c6c275977f8bba

SHA1
2aa3297e700208a43cad912c69aa5ff1f9435bce

SHA256
0807f543bc8322a5c55739c0a46aa8912feb5d3c8785b36188f9eb9e8b5e6af0

SHA512
6f0fba2a65073e0e8f526c4bfd0a24ae130a68c3f21b49595afc2bd4fd9c7d9f4661312f356011fae3ee626ffcb2ca364046e7fbc947f90d11719593a2ba9453

Download Submit
memory/4188-140-0x000000003F840000-0x000000003FCA0000-memory.dmp

Filesize
4.4MB

Download
memory/4188-144-0x000000003F840000-0x000000003FCA0000-memory.dmp

Filesize
4.4MB

Download
memory/4188-143-0x000000003F840000-0x000000003FCA0000-memory.dmp

Filesize
4.4MB

Download
memory/4188-142-0x000000003F840000-0x000000003FCA0000-memory.dmp

Filesize
4.4MB

Download
memory/4188-141-0x0000000077BD0000-0x0000000077D73000-memory.dmp

Filesize
1.6MB

Download
memory/4448-134-0x000000003FAA0000-0x000000003FF00000-memory.dmp

Filesize
4.4MB

Download
memory/4448-138-0x000000003FAA0000-0x000000003FF00000-memory.dmp

Filesize
4.4MB

Download
memory/4448-139-0x0000000077BD0000-0x0000000077D73000-memory.dmp

Filesize
1.6MB

Download
memory/4448-130-0x000000003FAA0000-0x000000003FF00000-memory.dmp

Filesize
4.4MB

Download
memory/4448-133-0x000000003FAA0000-0x000000003FF00000-memory.dmp

Filesize
4.4MB

Download
memory/4448-132-0x000000003FAA0000-0x000000003FF00000-memory.dmp

Filesize
4.4MB

Download
memory/4448-131-0x0000000077BD0000-0x0000000077D73000-memory.dmp

Filesize
1.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads