buer | ca334df8e40d7a2977d979ce91cf79c225612b3bd5bada4920d3777cb08bd5db

General

Target

ca334df8e40d7a2977d979ce91cf79c225612b3bd5bada4920d3777cb08bd5db.exe
Size

2.0MB
MD5

2f7f60ef423947bac5628fa46a7762ac
SHA1

dd4d6463e1b4fad95790682604cde103d457d7c3
SHA256

ca334df8e40d7a2977d979ce91cf79c225612b3bd5bada4920d3777cb08bd5db
SHA512

8f867da39f77b30a6d405556389ec897aff4213dbf7ee16faff098c5956cdf810b6c83e59c94a25359b6e49ad4f6552724cf8a2b39383d2cd5fabf1abc032653

Score

10^/10

buer evasion loader persistence

Malware Config

Extracted

Family

buer

C2

http://loood1.top/

http://loood2.top/

Signatures

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

Buer Loader 3 IoCs

Detects Buer loader in memory or disk.

loader

resource	yara_rule
behavioral2/memory/4524-135-0x000000003F1F0000-0x000000003F6D6000-memory.dmp	buer
behavioral2/memory/820-138-0x000000003F6D0000-0x000000003FBB6000-memory.dmp	buer
behavioral2/memory/820-141-0x000000003F6D0000-0x000000003FBB6000-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__	manager.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	ca334df8e40d7a2977d979ce91cf79c225612b3bd5bada4920d3777cb08bd5db.exe

Executes dropped EXE 1 IoCs

pid	Process
820	manager.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	ca334df8e40d7a2977d979ce91cf79c225612b3bd5bada4920d3777cb08bd5db.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	ca334df8e40d7a2977d979ce91cf79c225612b3bd5bada4920d3777cb08bd5db.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	manager.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	manager.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-1-5-21-2372564722-193526734-2636556182-1000\Software\Wine	ca334df8e40d7a2977d979ce91cf79c225612b3bd5bada4920d3777cb08bd5db.exe
Key opened	\REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\Software\Wine	manager.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-1-5-21-2372564722-193526734-2636556182-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	manager.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\ActiveX Component = "C:\\Users\\Admin\\AppData\\Roaming\\ActiveX\\manager.exe"	manager.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4524	ca334df8e40d7a2977d979ce91cf79c225612b3bd5bada4920d3777cb08bd5db.exe
820	manager.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
2516	3464	WerFault.exe	83
3172	3464	WerFault.exe	83

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4524	ca334df8e40d7a2977d979ce91cf79c225612b3bd5bada4920d3777cb08bd5db.exe
4524	ca334df8e40d7a2977d979ce91cf79c225612b3bd5bada4920d3777cb08bd5db.exe
820	manager.exe
820	manager.exe
820	manager.exe
820	manager.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4524 wrote to memory of 820	4524	ca334df8e40d7a2977d979ce91cf79c225612b3bd5bada4920d3777cb08bd5db.exe	82
PID 4524 wrote to memory of 820	4524	ca334df8e40d7a2977d979ce91cf79c225612b3bd5bada4920d3777cb08bd5db.exe	82
PID 4524 wrote to memory of 820	4524	ca334df8e40d7a2977d979ce91cf79c225612b3bd5bada4920d3777cb08bd5db.exe	82
PID 820 wrote to memory of 3464	820	manager.exe	83
PID 820 wrote to memory of 3464	820	manager.exe	83
PID 820 wrote to memory of 3464	820	manager.exe	83
PID 820 wrote to memory of 3464	820	manager.exe	83
PID 820 wrote to memory of 3464	820	manager.exe	83
PID 820 wrote to memory of 3464	820	manager.exe	83
PID 820 wrote to memory of 3464	820	manager.exe	83
PID 820 wrote to memory of 3464	820	manager.exe	83
PID 820 wrote to memory of 3464	820	manager.exe	83
PID 820 wrote to memory of 3464	820	manager.exe	83
PID 820 wrote to memory of 3464	820	manager.exe	83
PID 820 wrote to memory of 3464	820	manager.exe	83

C:\Users\Admin\AppData\Local\Temp\ca334df8e40d7a2977d979ce91cf79c225612b3bd5bada4920d3777cb08bd5db.exe
"C:\Users\Admin\AppData\Local\Temp\ca334df8e40d7a2977d979ce91cf79c225612b3bd5bada4920d3777cb08bd5db.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:4524
- C:\Users\Admin\AppData\Roaming\ActiveX\manager.exe
  C:\Users\Admin\AppData\Roaming\ActiveX\manager.exe "C:\Users\Admin\AppData\Local\Temp\ca334df8e40d7a2977d979ce91cf79c225612b3bd5bada4920d3777cb08bd5db.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
  - Adds Run key to start application
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:820
- - C:\Windows\SysWOW64\secinit.exe
    C:\Users\Admin\AppData\Roaming\ActiveX\manager.exe
    3⤵
    PID:3464
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3464 -s 284
      4⤵
      Program crash
      PID:2516
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3464 -s 292
      4⤵
      Program crash
      PID:3172

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 3464 -ip 3464
1⤵
PID:4824

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 372 -p 3464 -ip 3464
1⤵
PID:432

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\ActiveX\manager.exe

Filesize
2.0MB

MD5
2f7f60ef423947bac5628fa46a7762ac

SHA1
dd4d6463e1b4fad95790682604cde103d457d7c3

SHA256
ca334df8e40d7a2977d979ce91cf79c225612b3bd5bada4920d3777cb08bd5db

SHA512
8f867da39f77b30a6d405556389ec897aff4213dbf7ee16faff098c5956cdf810b6c83e59c94a25359b6e49ad4f6552724cf8a2b39383d2cd5fabf1abc032653

Download Submit
C:\Users\Admin\AppData\Roaming\ActiveX\manager.exe

Filesize
2.0MB

MD5
2f7f60ef423947bac5628fa46a7762ac

SHA1
dd4d6463e1b4fad95790682604cde103d457d7c3

SHA256
ca334df8e40d7a2977d979ce91cf79c225612b3bd5bada4920d3777cb08bd5db

SHA512
8f867da39f77b30a6d405556389ec897aff4213dbf7ee16faff098c5956cdf810b6c83e59c94a25359b6e49ad4f6552724cf8a2b39383d2cd5fabf1abc032653

Download Submit
memory/820-137-0x0000000077980000-0x0000000077B23000-memory.dmp

Filesize
1.6MB

Download
memory/820-138-0x000000003F6D0000-0x000000003FBB6000-memory.dmp

Filesize
4.9MB

Download
memory/820-140-0x0000000077980000-0x0000000077B23000-memory.dmp

Filesize
1.6MB

Download
memory/820-141-0x000000003F6D0000-0x000000003FBB6000-memory.dmp

Filesize
4.9MB

Download
memory/3464-139-0x0000000001200000-0x00000000016E6000-memory.dmp

Filesize
4.9MB

Download
memory/4524-130-0x000000003F1F0000-0x000000003F6D6000-memory.dmp

Filesize
4.9MB

Download
memory/4524-134-0x0000000077980000-0x0000000077B23000-memory.dmp

Filesize
1.6MB

Download
memory/4524-135-0x000000003F1F0000-0x000000003F6D6000-memory.dmp

Filesize
4.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads