buer | 593cf2c6d3140a5bf6bb6378aeadbc15abfa17691250e6ef1804d40534fd8a2e

Analysis

max time kernel
150s
max time network
151s
platform
windows7_x64
resource
win7v20201028
submitted
24-12-2020 01:51

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General

Target

593cf2c6d3140a5bf6bb6378aeadbc15abfa17691250e6ef1804d40534fd8a2e.exe
Size

80KB
MD5

a20399351b23e0bf909677d85c1025cb
SHA1

30e4e30528bf931f096093ea81822fb89f4d71dc
SHA256

593cf2c6d3140a5bf6bb6378aeadbc15abfa17691250e6ef1804d40534fd8a2e
SHA512

8087b12dad90c54d18e46987aa6ed25cb098097a605c907621bbcf6fa97569b25531b93f5a30f1aca530b8e214d9d5f90b223c1b2bfea3e5637d762c763c15bd

Score

10^/10

buer loader

Malware Config

Extracted

Family

buer

selectorbasebanks.com

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.

resource	yara_rule
behavioral1/memory/1240-3-0x0000000040000000-0x0000000040009000-memory.dmp	buer
behavioral1/memory/1240-4-0x0000000040005DA8-mapping.dmp	buer
behavioral1/memory/1240-5-0x0000000040000000-0x0000000040009000-memory.dmp	buer

Loads dropped DLL 1 IoCs

pid	Process
836	593cf2c6d3140a5bf6bb6378aeadbc15abfa17691250e6ef1804d40534fd8a2e.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 836 set thread context of 1240	836	593cf2c6d3140a5bf6bb6378aeadbc15abfa17691250e6ef1804d40534fd8a2e.exe	29

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
836	593cf2c6d3140a5bf6bb6378aeadbc15abfa17691250e6ef1804d40534fd8a2e.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 836 wrote to memory of 1240	836	593cf2c6d3140a5bf6bb6378aeadbc15abfa17691250e6ef1804d40534fd8a2e.exe	29
PID 836 wrote to memory of 1240	836	593cf2c6d3140a5bf6bb6378aeadbc15abfa17691250e6ef1804d40534fd8a2e.exe	29
PID 836 wrote to memory of 1240	836	593cf2c6d3140a5bf6bb6378aeadbc15abfa17691250e6ef1804d40534fd8a2e.exe	29
PID 836 wrote to memory of 1240	836	593cf2c6d3140a5bf6bb6378aeadbc15abfa17691250e6ef1804d40534fd8a2e.exe	29
PID 836 wrote to memory of 1240	836	593cf2c6d3140a5bf6bb6378aeadbc15abfa17691250e6ef1804d40534fd8a2e.exe	29

C:\Users\Admin\AppData\Local\Temp\593cf2c6d3140a5bf6bb6378aeadbc15abfa17691250e6ef1804d40534fd8a2e.exe
"C:\Users\Admin\AppData\Local\Temp\593cf2c6d3140a5bf6bb6378aeadbc15abfa17691250e6ef1804d40534fd8a2e.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:836
- C:\Users\Admin\AppData\Local\Temp\593cf2c6d3140a5bf6bb6378aeadbc15abfa17691250e6ef1804d40534fd8a2e.exe
  "C:\Users\Admin\AppData\Local\Temp\593cf2c6d3140a5bf6bb6378aeadbc15abfa17691250e6ef1804d40534fd8a2e.exe"
  2⤵
  PID:1240

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

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Downloads

memory/1240-3-0x0000000040000000-0x0000000040009000-memory.dmp

Filesize
36KB

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memory/1240-5-0x0000000040000000-0x0000000040009000-memory.dmp

Filesize
36KB

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