buer | 1b1f3cf5a07eda43fab214b026b2431baec1cf9632d3c0017e8555e87cd0f676

General

Target

1b1f3cf5a07eda43fab214b026b2431baec1cf9632d3c0017e8555e87cd0f676.exe
Size

1.6MB
MD5

1518649e83f4c956ce199824aab84edd
SHA1

22e1c529f39cef4ea6e266323fb4a0d620be9cd1
SHA256

1b1f3cf5a07eda43fab214b026b2431baec1cf9632d3c0017e8555e87cd0f676
SHA512

595f4ebb9a78672e29b42429b8cf31055f3af2393640aa41ae2766947406005a82267eba33c99ad8f7b5c71bc4a3cf10d890981c27cbffb2f9893e2c08147ed2

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 2 IoCs

Detects Buer loader in memory or disk.

loader

resource	yara_rule
behavioral2/memory/1940-131-0x000000003F200000-0x000000003F616000-memory.dmp	buer
behavioral2/memory/2428-136-0x000000003F750000-0x000000003FB66000-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
2428	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	1b1f3cf5a07eda43fab214b026b2431baec1cf9632d3c0017e8555e87cd0f676.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	1b1f3cf5a07eda43fab214b026b2431baec1cf9632d3c0017e8555e87cd0f676.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-1-5-21-1809750270-3141839489-3074374771-1000\Software\Wine	1b1f3cf5a07eda43fab214b026b2431baec1cf9632d3c0017e8555e87cd0f676.exe
Key opened	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Software\Wine	plugin.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1940	1b1f3cf5a07eda43fab214b026b2431baec1cf9632d3c0017e8555e87cd0f676.exe
2428	plugin.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4892	2304	WerFault.exe	90

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1940	1b1f3cf5a07eda43fab214b026b2431baec1cf9632d3c0017e8555e87cd0f676.exe
1940	1b1f3cf5a07eda43fab214b026b2431baec1cf9632d3c0017e8555e87cd0f676.exe
2428	plugin.exe
2428	plugin.exe
2428	plugin.exe
2428	plugin.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1940 wrote to memory of 2428	1940	1b1f3cf5a07eda43fab214b026b2431baec1cf9632d3c0017e8555e87cd0f676.exe	89
PID 1940 wrote to memory of 2428	1940	1b1f3cf5a07eda43fab214b026b2431baec1cf9632d3c0017e8555e87cd0f676.exe	89
PID 1940 wrote to memory of 2428	1940	1b1f3cf5a07eda43fab214b026b2431baec1cf9632d3c0017e8555e87cd0f676.exe	89
PID 2428 wrote to memory of 2304	2428	plugin.exe	90
PID 2428 wrote to memory of 2304	2428	plugin.exe	90
PID 2428 wrote to memory of 2304	2428	plugin.exe	90
PID 2428 wrote to memory of 2304	2428	plugin.exe	90
PID 2428 wrote to memory of 2304	2428	plugin.exe	90
PID 2428 wrote to memory of 2304	2428	plugin.exe	90
PID 2428 wrote to memory of 2304	2428	plugin.exe	90
PID 2428 wrote to memory of 2304	2428	plugin.exe	90
PID 2428 wrote to memory of 2304	2428	plugin.exe	90
PID 2428 wrote to memory of 2304	2428	plugin.exe	90
PID 2428 wrote to memory of 2304	2428	plugin.exe	90

C:\Users\Admin\AppData\Local\Temp\1b1f3cf5a07eda43fab214b026b2431baec1cf9632d3c0017e8555e87cd0f676.exe
"C:\Users\Admin\AppData\Local\Temp\1b1f3cf5a07eda43fab214b026b2431baec1cf9632d3c0017e8555e87cd0f676.exe"
1⤵
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1940
- C:\ProgramData\UBlockPlugin\plugin.exe
  C:\ProgramData\UBlockPlugin\plugin.exe "C:\Users\Admin\AppData\Local\Temp\1b1f3cf5a07eda43fab214b026b2431baec1cf9632d3c0017e8555e87cd0f676.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:2428
- - C:\Windows\SysWOW64\secinit.exe
    C:\ProgramData\UBlockPlugin\plugin.exe
    3⤵
    PID:2304
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2304 -s 232
      4⤵
      Program crash
      PID:4892

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2304 -ip 2304
1⤵
PID:4152

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
1.6MB

MD5
1518649e83f4c956ce199824aab84edd

SHA1
22e1c529f39cef4ea6e266323fb4a0d620be9cd1

SHA256
1b1f3cf5a07eda43fab214b026b2431baec1cf9632d3c0017e8555e87cd0f676

SHA512
595f4ebb9a78672e29b42429b8cf31055f3af2393640aa41ae2766947406005a82267eba33c99ad8f7b5c71bc4a3cf10d890981c27cbffb2f9893e2c08147ed2

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

Filesize
1.6MB

MD5
1518649e83f4c956ce199824aab84edd

SHA1
22e1c529f39cef4ea6e266323fb4a0d620be9cd1

SHA256
1b1f3cf5a07eda43fab214b026b2431baec1cf9632d3c0017e8555e87cd0f676

SHA512
595f4ebb9a78672e29b42429b8cf31055f3af2393640aa41ae2766947406005a82267eba33c99ad8f7b5c71bc4a3cf10d890981c27cbffb2f9893e2c08147ed2

Download Submit
memory/1940-130-0x0000000077580000-0x0000000077723000-memory.dmp

Filesize
1.6MB

Download
memory/1940-131-0x000000003F200000-0x000000003F616000-memory.dmp

Filesize
4.1MB

Download
memory/2428-135-0x0000000077580000-0x0000000077723000-memory.dmp

Filesize
1.6MB

Download
memory/2428-136-0x000000003F750000-0x000000003FB66000-memory.dmp

Filesize
4.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads