buer | 5fdb1b3df88e49123804cb3cbdfee96b1e29371ca7ac6f27e3c57228a563aa10

General

Target

Invoice267782.xls
Size

254KB
MD5

7e15415b138af90c8388aa309276ef7e
SHA1

23aba1aaf9d35894333fe29c86f76a236f602bdd
SHA256

5fdb1b3df88e49123804cb3cbdfee96b1e29371ca7ac6f27e3c57228a563aa10
SHA512

a275f4292dde13441d9dab4bd48b1acd9e88f7b1fbabd55dd33bced1f085d9b6d1b79121edda8fb99f8ae05d184d3e94940d14a4da6156094ead4620a1e12ea6

Score

10^/10

buer loader

Malware Config

Extracted

Family

buer

C2

webgraitupeople.com

Signatures

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

Buer Loader 1 IoCs

Detects Buer loader in memory or disk.

resource	yara_rule
behavioral2/memory/1632-13-0x0000000040000000-0x000000004000A000-memory.dmp	buer

Executes dropped EXE 2 IoCs

pid	Process
3796	scpload.exe
1632	scpload.exe

Loads dropped DLL 1 IoCs

pid	Process
3796	scpload.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3796 set thread context of 1632	3796	scpload.exe	84

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

NSIS installer 8 IoCs

installer

resource	yara_rule
	nsis_installer_1
	nsis_installer_2
behavioral2/files/0x0002000000015660-8.dat	nsis_installer_1
behavioral2/files/0x0002000000015660-8.dat	nsis_installer_2
behavioral2/files/0x0002000000015660-9.dat	nsis_installer_1
behavioral2/files/0x0002000000015660-9.dat	nsis_installer_2
behavioral2/files/0x0002000000015660-12.dat	nsis_installer_1
behavioral2/files/0x0002000000015660-12.dat	nsis_installer_2

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1212	EXCEL.EXE

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3796	scpload.exe

Suspicious use of SetWindowsHookEx 14 IoCs

pid	Process
1212	EXCEL.EXE
1212	EXCEL.EXE
1212	EXCEL.EXE
1212	EXCEL.EXE
1212	EXCEL.EXE
1212	EXCEL.EXE
1212	EXCEL.EXE
1212	EXCEL.EXE
1212	EXCEL.EXE
1212	EXCEL.EXE
1212	EXCEL.EXE
1212	EXCEL.EXE
1212	EXCEL.EXE
1212	EXCEL.EXE

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1212 wrote to memory of 3796	1212	EXCEL.EXE	83
PID 1212 wrote to memory of 3796	1212	EXCEL.EXE	83
PID 1212 wrote to memory of 3796	1212	EXCEL.EXE	83
PID 3796 wrote to memory of 1632	3796	scpload.exe	84
PID 3796 wrote to memory of 1632	3796	scpload.exe	84
PID 3796 wrote to memory of 1632	3796	scpload.exe	84
PID 3796 wrote to memory of 1632	3796	scpload.exe	84

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\Invoice267782.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1212
- C:\jobtitle\spaceodk\scpload.exe
  "C:\jobtitle\spaceodk\scpload.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:3796
- - C:\jobtitle\spaceodk\scpload.exe
    "C:\jobtitle\spaceodk\scpload.exe"
    3⤵
    - Executes dropped EXE
    PID:1632

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1212-6-0x00007FFC22770000-0x00007FFC22780000-memory.dmp

Filesize
64KB

Download
memory/1212-2-0x00007FFC22770000-0x00007FFC22780000-memory.dmp

Filesize
64KB

Download
memory/1212-5-0x00007FFC48550000-0x00007FFC48B87000-memory.dmp

Filesize
6.2MB

Download
memory/1212-4-0x00007FFC22770000-0x00007FFC22780000-memory.dmp

Filesize
64KB

Download
memory/1212-3-0x00007FFC22770000-0x00007FFC22780000-memory.dmp

Filesize
64KB

Download
memory/1212-14-0x00007FFC22770000-0x00007FFC22780000-memory.dmp

Filesize
64KB

Download
memory/1212-15-0x00007FFC22770000-0x00007FFC22780000-memory.dmp

Filesize
64KB

Download
memory/1212-16-0x00007FFC22770000-0x00007FFC22780000-memory.dmp

Filesize
64KB

Download
memory/1212-17-0x00007FFC22770000-0x00007FFC22780000-memory.dmp

Filesize
64KB

Download
memory/1632-13-0x0000000040000000-0x000000004000A000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads