buer | fb07db551c31c17ef048f04628cb49f400cf3b5d671b90c3334326755e709afa

General

Target

fb07db551c31c17ef048f04628cb49f400cf3b5d671b90c3334326755e709afa.exe
Size

1.4MB
MD5

652ab99bb0d38c2b096919ad9827cca6
SHA1

9604c9fb9c777f70c4911f575180da9db090ca0e
SHA256

fb07db551c31c17ef048f04628cb49f400cf3b5d671b90c3334326755e709afa
SHA512

b8f7ab53ce6360665158d4a8944483bfdcf2c7baf7e03bbd5cc53944e8b3cafdf8eacf105e5851f1cf3a200fadfe52ee24230d08ffacbd9ac74be0e76d005c9d

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 6 IoCs

Detects Buer loader in memory or disk.

loader

resource	yara_rule
behavioral2/memory/4952-135-0x000000003F4F0000-0x000000003F8C6000-memory.dmp	buer
behavioral2/memory/4952-136-0x000000003F4F0000-0x000000003F8C6000-memory.dmp	buer
behavioral2/memory/4952-140-0x000000003F4F0000-0x000000003F8C6000-memory.dmp	buer
behavioral2/memory/2404-144-0x000000003FCF0000-0x00000000400C6000-memory.dmp	buer
behavioral2/memory/2404-145-0x000000003FCF0000-0x00000000400C6000-memory.dmp	buer
behavioral2/memory/2404-146-0x000000003FCF0000-0x00000000400C6000-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__	fb07db551c31c17ef048f04628cb49f400cf3b5d671b90c3334326755e709afa.exe

Executes dropped EXE 1 IoCs

pid	Process
2404	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	fb07db551c31c17ef048f04628cb49f400cf3b5d671b90c3334326755e709afa.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	fb07db551c31c17ef048f04628cb49f400cf3b5d671b90c3334326755e709afa.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-1-5-21-3463845317-933582289-45817732-1000\Software\Wine	fb07db551c31c17ef048f04628cb49f400cf3b5d671b90c3334326755e709afa.exe
Key opened	\REGISTRY\USER\S-1-5-21-3463845317-933582289-45817732-1000\Software\Wine	plugin.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4952	fb07db551c31c17ef048f04628cb49f400cf3b5d671b90c3334326755e709afa.exe
2404	plugin.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4588	5056	WerFault.exe	83

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4952	fb07db551c31c17ef048f04628cb49f400cf3b5d671b90c3334326755e709afa.exe
4952	fb07db551c31c17ef048f04628cb49f400cf3b5d671b90c3334326755e709afa.exe
2404	plugin.exe
2404	plugin.exe
2404	plugin.exe
2404	plugin.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4952 wrote to memory of 2404	4952	fb07db551c31c17ef048f04628cb49f400cf3b5d671b90c3334326755e709afa.exe	82
PID 4952 wrote to memory of 2404	4952	fb07db551c31c17ef048f04628cb49f400cf3b5d671b90c3334326755e709afa.exe	82
PID 4952 wrote to memory of 2404	4952	fb07db551c31c17ef048f04628cb49f400cf3b5d671b90c3334326755e709afa.exe	82
PID 2404 wrote to memory of 5056	2404	plugin.exe	83
PID 2404 wrote to memory of 5056	2404	plugin.exe	83
PID 2404 wrote to memory of 5056	2404	plugin.exe	83
PID 2404 wrote to memory of 5056	2404	plugin.exe	83
PID 2404 wrote to memory of 5056	2404	plugin.exe	83
PID 2404 wrote to memory of 5056	2404	plugin.exe	83
PID 2404 wrote to memory of 5056	2404	plugin.exe	83
PID 2404 wrote to memory of 5056	2404	plugin.exe	83
PID 2404 wrote to memory of 5056	2404	plugin.exe	83
PID 2404 wrote to memory of 5056	2404	plugin.exe	83
PID 2404 wrote to memory of 5056	2404	plugin.exe	83

C:\Users\Admin\AppData\Local\Temp\fb07db551c31c17ef048f04628cb49f400cf3b5d671b90c3334326755e709afa.exe
"C:\Users\Admin\AppData\Local\Temp\fb07db551c31c17ef048f04628cb49f400cf3b5d671b90c3334326755e709afa.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:4952
- C:\ProgramData\UBlockPlugin\plugin.exe
  C:\ProgramData\UBlockPlugin\plugin.exe "C:\Users\Admin\AppData\Local\Temp\fb07db551c31c17ef048f04628cb49f400cf3b5d671b90c3334326755e709afa.exe" ensgJJ
  2⤵
  - 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:2404
- - C:\Windows\SysWOW64\secinit.exe
    C:\ProgramData\UBlockPlugin\plugin.exe
    3⤵
    PID:5056
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 5056 -s 220
      4⤵
      Program crash
      PID:4588

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 5056 -ip 5056
1⤵
PID:2660

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
1.4MB

MD5
652ab99bb0d38c2b096919ad9827cca6

SHA1
9604c9fb9c777f70c4911f575180da9db090ca0e

SHA256
fb07db551c31c17ef048f04628cb49f400cf3b5d671b90c3334326755e709afa

SHA512
b8f7ab53ce6360665158d4a8944483bfdcf2c7baf7e03bbd5cc53944e8b3cafdf8eacf105e5851f1cf3a200fadfe52ee24230d08ffacbd9ac74be0e76d005c9d

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

Filesize
1.4MB

MD5
652ab99bb0d38c2b096919ad9827cca6

SHA1
9604c9fb9c777f70c4911f575180da9db090ca0e

SHA256
fb07db551c31c17ef048f04628cb49f400cf3b5d671b90c3334326755e709afa

SHA512
b8f7ab53ce6360665158d4a8944483bfdcf2c7baf7e03bbd5cc53944e8b3cafdf8eacf105e5851f1cf3a200fadfe52ee24230d08ffacbd9ac74be0e76d005c9d

Download Submit
memory/2404-146-0x000000003FCF0000-0x00000000400C6000-memory.dmp

Filesize
3.8MB

Download
memory/2404-145-0x000000003FCF0000-0x00000000400C6000-memory.dmp

Filesize
3.8MB

Download
memory/2404-144-0x000000003FCF0000-0x00000000400C6000-memory.dmp

Filesize
3.8MB

Download
memory/2404-143-0x0000000077170000-0x0000000077313000-memory.dmp

Filesize
1.6MB

Download
memory/2404-142-0x000000003FCF0000-0x00000000400C6000-memory.dmp

Filesize
3.8MB

Download
memory/4952-136-0x000000003F4F0000-0x000000003F8C6000-memory.dmp

Filesize
3.8MB

Download
memory/4952-141-0x0000000077170000-0x0000000077313000-memory.dmp

Filesize
1.6MB

Download
memory/4952-140-0x000000003F4F0000-0x000000003F8C6000-memory.dmp

Filesize
3.8MB

Download
memory/4952-132-0x000000003F4F0000-0x000000003F8C6000-memory.dmp

Filesize
3.8MB

Download
memory/4952-135-0x000000003F4F0000-0x000000003F8C6000-memory.dmp

Filesize
3.8MB

Download
memory/4952-134-0x0000000077170000-0x0000000077313000-memory.dmp

Filesize
1.6MB

Download
memory/4952-133-0x000000003F4F0000-0x000000003F8C6000-memory.dmp

Filesize
3.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads