buer | 6728db086194c2fa6a8e17e7b13bac1f5329b501e6f93b3587416895d387d343

Analysis

max time kernel
150s
max time network
154s
platform
windows10_x64
resource
win10v20201028
submitted
09-11-2020 19:38

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

buer.exe
Size

111KB
MD5

f884618092b55e3edc48096757aab143
SHA1

0c0ad1301fc561699dba22cc779decc0df5570a1
SHA256

6728db086194c2fa6a8e17e7b13bac1f5329b501e6f93b3587416895d387d343
SHA512

195f4995907e34867d72778fb7e5857ea16e802376cf7ef17e2af3afa64e929bacfed4ed1b60d71a1ad8ea29e47c795c97ee7e41b6a02db59c9cc68fbb32e6ad

Score

10^/10

buer loader

Malware Config

Extracted

Family

buer

https://oopscll5.top/

https://1raidertr.top/

Signatures

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

Buer Loader 4 IoCs

Detects Buer loader in memory or disk.

resource	yara_rule
behavioral2/memory/1232-1-0x0000000040000000-0x000000004000B000-memory.dmp	buer
behavioral2/memory/1232-2-0x00000000400030B5-mapping.dmp	buer
behavioral2/memory/1232-3-0x0000000040000000-0x000000004000B000-memory.dmp	buer
behavioral2/memory/732-4-0x00000000027E0000-0x00000000027EB000-memory.dmp	buer

Loads dropped DLL 1 IoCs

pid	Process
732	buer.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 732 set thread context of 1232	732	buer.exe	78

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

System Information Discovery
T1082

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
732	buer.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 732 wrote to memory of 1232	732	buer.exe	78
PID 732 wrote to memory of 1232	732	buer.exe	78
PID 732 wrote to memory of 1232	732	buer.exe	78
PID 732 wrote to memory of 1232	732	buer.exe	78

C:\Users\Admin\AppData\Local\Temp\buer.exe
"C:\Users\Admin\AppData\Local\Temp\buer.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:732
- C:\Users\Admin\AppData\Local\Temp\buer.exe
  "C:\Users\Admin\AppData\Local\Temp\buer.exe"
  2⤵
  PID:1232

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/732-4-0x00000000027E0000-0x00000000027EB000-memory.dmp

Filesize
44KB

Download
memory/1232-1-0x0000000040000000-0x000000004000B000-memory.dmp

Filesize
44KB

Download
memory/1232-3-0x0000000040000000-0x000000004000B000-memory.dmp

Filesize
44KB

Download