buer | 0dd7e132fb5e9dd241ae103110d085bc4d1ef7396ca6c84a3b91dc44f3aff50f

General

Target

0dd7e132fb5e9dd241ae103110d085bc4d1ef7396ca6c84a3b91dc44f3aff50f.exe
Size

1.9MB
MD5

73461127ecd53340878c5c8dd558cacb
SHA1

4efb8f4f888fed27a1866118739fb4b3e7dcbd0e
SHA256

0dd7e132fb5e9dd241ae103110d085bc4d1ef7396ca6c84a3b91dc44f3aff50f
SHA512

2a7eb7a92bda07637631356faf6d9357cf3393c119cf663f3c9d31ec8c64c53e67801bd0c26004a973346e98a47a4f75e711899cf1c1b142a50df00306b9d390

Score

10^/10

buer evasion loader persistence

Malware Config

Extracted

Family

buer

C2

frrn8--jmmmb/,rmn-

frrn8--jmmmb0,rmn-

cook5**gjjj_,)ojk*

cook5**gjjj_-)ojk*

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/4984-135-0x000000003F940000-0x000000003FDFB000-memory.dmp	buer
behavioral2/memory/1012-138-0x000000003FF40000-0x00000000403FB000-memory.dmp	buer
behavioral2/memory/1012-142-0x000000003FF40000-0x00000000403FB000-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
1012	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	0dd7e132fb5e9dd241ae103110d085bc4d1ef7396ca6c84a3b91dc44f3aff50f.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	0dd7e132fb5e9dd241ae103110d085bc4d1ef7396ca6c84a3b91dc44f3aff50f.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-1-5-21-3751123196-3323558407-1869646069-1000\Software\Wine	0dd7e132fb5e9dd241ae103110d085bc4d1ef7396ca6c84a3b91dc44f3aff50f.exe
Key opened	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\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
Set value (str)	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\ActiveX Component = "C:\\Users\\Admin\\AppData\\Roaming\\ActiveX\\manager.exe"	manager.exe
Key created	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	manager.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4984	0dd7e132fb5e9dd241ae103110d085bc4d1ef7396ca6c84a3b91dc44f3aff50f.exe
1012	manager.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4508	2204	WerFault.exe	80
1452	2204	WerFault.exe	80

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4984	0dd7e132fb5e9dd241ae103110d085bc4d1ef7396ca6c84a3b91dc44f3aff50f.exe
4984	0dd7e132fb5e9dd241ae103110d085bc4d1ef7396ca6c84a3b91dc44f3aff50f.exe
1012	manager.exe
1012	manager.exe
1012	manager.exe
1012	manager.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4984 wrote to memory of 1012	4984	0dd7e132fb5e9dd241ae103110d085bc4d1ef7396ca6c84a3b91dc44f3aff50f.exe	79
PID 4984 wrote to memory of 1012	4984	0dd7e132fb5e9dd241ae103110d085bc4d1ef7396ca6c84a3b91dc44f3aff50f.exe	79
PID 4984 wrote to memory of 1012	4984	0dd7e132fb5e9dd241ae103110d085bc4d1ef7396ca6c84a3b91dc44f3aff50f.exe	79
PID 1012 wrote to memory of 2204	1012	manager.exe	80
PID 1012 wrote to memory of 2204	1012	manager.exe	80
PID 1012 wrote to memory of 2204	1012	manager.exe	80
PID 1012 wrote to memory of 2204	1012	manager.exe	80
PID 1012 wrote to memory of 2204	1012	manager.exe	80
PID 1012 wrote to memory of 2204	1012	manager.exe	80
PID 1012 wrote to memory of 2204	1012	manager.exe	80
PID 1012 wrote to memory of 2204	1012	manager.exe	80
PID 1012 wrote to memory of 2204	1012	manager.exe	80
PID 1012 wrote to memory of 2204	1012	manager.exe	80
PID 1012 wrote to memory of 2204	1012	manager.exe	80
PID 1012 wrote to memory of 2204	1012	manager.exe	80

C:\Users\Admin\AppData\Local\Temp\0dd7e132fb5e9dd241ae103110d085bc4d1ef7396ca6c84a3b91dc44f3aff50f.exe
"C:\Users\Admin\AppData\Local\Temp\0dd7e132fb5e9dd241ae103110d085bc4d1ef7396ca6c84a3b91dc44f3aff50f.exe"
1⤵
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4984
- C:\Users\Admin\AppData\Roaming\ActiveX\manager.exe
  C:\Users\Admin\AppData\Roaming\ActiveX\manager.exe "C:\Users\Admin\AppData\Local\Temp\0dd7e132fb5e9dd241ae103110d085bc4d1ef7396ca6c84a3b91dc44f3aff50f.exe" ensgJJ
  2⤵
  - 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:1012
- - C:\Windows\SysWOW64\secinit.exe
    C:\Users\Admin\AppData\Roaming\ActiveX\manager.exe
    3⤵
    PID:2204
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2204 -s 272
      4⤵
      Program crash
      PID:4508
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2204 -s 280
      4⤵
      Program crash
      PID:1452

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2204 -ip 2204
1⤵
PID:3516

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 2204 -ip 2204
1⤵
PID:4572

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
1.9MB

MD5
73461127ecd53340878c5c8dd558cacb

SHA1
4efb8f4f888fed27a1866118739fb4b3e7dcbd0e

SHA256
0dd7e132fb5e9dd241ae103110d085bc4d1ef7396ca6c84a3b91dc44f3aff50f

SHA512
2a7eb7a92bda07637631356faf6d9357cf3393c119cf663f3c9d31ec8c64c53e67801bd0c26004a973346e98a47a4f75e711899cf1c1b142a50df00306b9d390

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

Filesize
1.9MB

MD5
73461127ecd53340878c5c8dd558cacb

SHA1
4efb8f4f888fed27a1866118739fb4b3e7dcbd0e

SHA256
0dd7e132fb5e9dd241ae103110d085bc4d1ef7396ca6c84a3b91dc44f3aff50f

SHA512
2a7eb7a92bda07637631356faf6d9357cf3393c119cf663f3c9d31ec8c64c53e67801bd0c26004a973346e98a47a4f75e711899cf1c1b142a50df00306b9d390

Download Submit
memory/1012-137-0x0000000077B80000-0x0000000077D23000-memory.dmp

Filesize
1.6MB

Download
memory/1012-142-0x000000003FF40000-0x00000000403FB000-memory.dmp

Filesize
4.7MB

Download
memory/1012-141-0x0000000077B80000-0x0000000077D23000-memory.dmp

Filesize
1.6MB

Download
memory/1012-138-0x000000003FF40000-0x00000000403FB000-memory.dmp

Filesize
4.7MB

Download
memory/2204-140-0x0000000001010000-0x00000000014CB000-memory.dmp

Filesize
4.7MB

Download
memory/4984-136-0x0000000077B80000-0x0000000077D23000-memory.dmp

Filesize
1.6MB

Download
memory/4984-130-0x000000003F940000-0x000000003FDFB000-memory.dmp

Filesize
4.7MB

Download
memory/4984-135-0x000000003F940000-0x000000003FDFB000-memory.dmp

Filesize
4.7MB

Download
memory/4984-134-0x0000000077B80000-0x0000000077D23000-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