buer | fc3c68e9d36d703376fb466cc0126e5bedddda08170a2b41d297ff6dd5cfc23b

General

Target

fc3c68e9d36d703376fb466cc0126e5bedddda08170a2b41d297ff6dd5cfc23b.exe
Size

1.6MB
MD5

3c9c8fd4ce120ff1b2e7bf1b5d6a2dd3
SHA1

73fdcf58ecee325c35e9904ddd88508cd539251a
SHA256

fc3c68e9d36d703376fb466cc0126e5bedddda08170a2b41d297ff6dd5cfc23b
SHA512

00a2cf1592f6e8f7135187691506ff03d61e3d36f34db800b7baeac566b960d798f03d567fd7b71787e7770a6b98c3bee718aa5bab0a7d63df1ad68d1e6b9ded

Score

10^/10

buer evasion loader persistence

Malware Config

Extracted

Family

buer

C2

http://loaadik01.pro/

http://loaadik02.pro/

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/4832-134-0x000000003FCB0000-0x00000000400ED000-memory.dmp	buer
behavioral2/memory/4832-135-0x000000003FCB0000-0x00000000400ED000-memory.dmp	buer
behavioral2/memory/4832-136-0x000000003FCB0000-0x00000000400ED000-memory.dmp	buer
behavioral2/memory/3632-142-0x000000003F6B0000-0x000000003FAED000-memory.dmp	buer
behavioral2/memory/4832-143-0x000000003FCB0000-0x00000000400ED000-memory.dmp	buer
behavioral2/memory/3632-145-0x000000003F6B0000-0x000000003FAED000-memory.dmp	buer
behavioral2/memory/3632-146-0x000000003F6B0000-0x000000003FAED000-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__	fc3c68e9d36d703376fb466cc0126e5bedddda08170a2b41d297ff6dd5cfc23b.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	plugin.exe

Executes dropped EXE 1 IoCs

pid	Process
3632	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	fc3c68e9d36d703376fb466cc0126e5bedddda08170a2b41d297ff6dd5cfc23b.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	fc3c68e9d36d703376fb466cc0126e5bedddda08170a2b41d297ff6dd5cfc23b.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	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	fc3c68e9d36d703376fb466cc0126e5bedddda08170a2b41d297ff6dd5cfc23b.exe
Key opened	\REGISTRY\USER\S-1-5-21-3463845317-933582289-45817732-1000\Software\Wine	plugin.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3463845317-933582289-45817732-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	fc3c68e9d36d703376fb466cc0126e5bedddda08170a2b41d297ff6dd5cfc23b.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3463845317-933582289-45817732-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\UBlock = "C:\\Users\\Admin\\AppData\\Roaming\\UBlockPlugin\\plugin.exe"	fc3c68e9d36d703376fb466cc0126e5bedddda08170a2b41d297ff6dd5cfc23b.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4832	fc3c68e9d36d703376fb466cc0126e5bedddda08170a2b41d297ff6dd5cfc23b.exe
3632	plugin.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4832	fc3c68e9d36d703376fb466cc0126e5bedddda08170a2b41d297ff6dd5cfc23b.exe
4832	fc3c68e9d36d703376fb466cc0126e5bedddda08170a2b41d297ff6dd5cfc23b.exe
3632	plugin.exe
3632	plugin.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4832 wrote to memory of 3632	4832	fc3c68e9d36d703376fb466cc0126e5bedddda08170a2b41d297ff6dd5cfc23b.exe	94
PID 4832 wrote to memory of 3632	4832	fc3c68e9d36d703376fb466cc0126e5bedddda08170a2b41d297ff6dd5cfc23b.exe	94
PID 4832 wrote to memory of 3632	4832	fc3c68e9d36d703376fb466cc0126e5bedddda08170a2b41d297ff6dd5cfc23b.exe	94

C:\Users\Admin\AppData\Local\Temp\fc3c68e9d36d703376fb466cc0126e5bedddda08170a2b41d297ff6dd5cfc23b.exe
"C:\Users\Admin\AppData\Local\Temp\fc3c68e9d36d703376fb466cc0126e5bedddda08170a2b41d297ff6dd5cfc23b.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Adds Run key to start application
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4832
- C:\Users\Admin\AppData\Roaming\UBlockPlugin\plugin.exe
  C:\Users\Admin\AppData\Roaming\UBlockPlugin\plugin.exe "C:\Users\Admin\AppData\Local\Temp\fc3c68e9d36d703376fb466cc0126e5bedddda08170a2b41d297ff6dd5cfc23b.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
  PID:3632

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

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:\Users\Admin\AppData\Roaming\UBlockPlugin\plugin.exe

Filesize
1.6MB

MD5
3c9c8fd4ce120ff1b2e7bf1b5d6a2dd3

SHA1
73fdcf58ecee325c35e9904ddd88508cd539251a

SHA256
fc3c68e9d36d703376fb466cc0126e5bedddda08170a2b41d297ff6dd5cfc23b

SHA512
00a2cf1592f6e8f7135187691506ff03d61e3d36f34db800b7baeac566b960d798f03d567fd7b71787e7770a6b98c3bee718aa5bab0a7d63df1ad68d1e6b9ded

Download Submit
C:\Users\Admin\AppData\Roaming\UBlockPlugin\plugin.exe

Filesize
1.6MB

MD5
3c9c8fd4ce120ff1b2e7bf1b5d6a2dd3

SHA1
73fdcf58ecee325c35e9904ddd88508cd539251a

SHA256
fc3c68e9d36d703376fb466cc0126e5bedddda08170a2b41d297ff6dd5cfc23b

SHA512
00a2cf1592f6e8f7135187691506ff03d61e3d36f34db800b7baeac566b960d798f03d567fd7b71787e7770a6b98c3bee718aa5bab0a7d63df1ad68d1e6b9ded

Download Submit
memory/3632-141-0x00000000770F0000-0x0000000077293000-memory.dmp

Filesize
1.6MB

Download
memory/3632-140-0x000000003F6B0000-0x000000003FAED000-memory.dmp

Filesize
4.2MB

Download
memory/3632-142-0x000000003F6B0000-0x000000003FAED000-memory.dmp

Filesize
4.2MB

Download
memory/3632-145-0x000000003F6B0000-0x000000003FAED000-memory.dmp

Filesize
4.2MB

Download
memory/3632-146-0x000000003F6B0000-0x000000003FAED000-memory.dmp

Filesize
4.2MB

Download
memory/4832-135-0x000000003FCB0000-0x00000000400ED000-memory.dmp

Filesize
4.2MB

Download
memory/4832-136-0x000000003FCB0000-0x00000000400ED000-memory.dmp

Filesize
4.2MB

Download
memory/4832-134-0x000000003FCB0000-0x00000000400ED000-memory.dmp

Filesize
4.2MB

Download
memory/4832-133-0x00000000770F0000-0x0000000077293000-memory.dmp

Filesize
1.6MB

Download
memory/4832-132-0x000000003FCB0000-0x00000000400ED000-memory.dmp

Filesize
4.2MB

Download
memory/4832-143-0x000000003FCB0000-0x00000000400ED000-memory.dmp

Filesize
4.2MB

Download
memory/4832-144-0x00000000770F0000-0x0000000077293000-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