buer | 593cf2c6d3140a5bf6bb6378aeadbc15abfa17691250e6ef1804d40534fd8a2e

Analysis

max time kernel
12s
max time network
113s
platform
windows10_x64
resource
win10v20201028
submitted
23/12/2020, 20:39

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General

Target
MSettingIE.exe
Size 80KB
Sample201223-7llarej3qe
SHA256 593cf2c6d3140a5bf6bb6378aeadbc15abfa17691250e6ef1804d40534fd8a2e
MD5 a20399351b23e0bf909677d85c1025cb
SHA1 30e4e30528bf931f096093ea81822fb89f4d71dc
SHA512 8087b12dad90c54d18e46987aa6ed25cb098097a605c907621bbcf6fa97569b25531b93f5a30f1aca530b8e214d9d5f90b223c1b2bfea3e5637d762c763c15bd
MD5 SHA1 SHA512

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
behavioral2/memory/4172-3-0x0000000040000000-0x0000000040009000-memory.dmp	buer
behavioral2/memory/4172-4-0x0000000040005DA8-mapping.dmp	buer
behavioral2/memory/4172-5-0x0000000040000000-0x0000000040009000-memory.dmp	buer

Loads dropped DLL 1 IoCs

pid	Process
4768	MSettingIE.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4768 set thread context of 4172	4768	MSettingIE.exe	77

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
4768	MSettingIE.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4768 wrote to memory of 4172	4768	MSettingIE.exe	77
PID 4768 wrote to memory of 4172	4768	MSettingIE.exe	77
PID 4768 wrote to memory of 4172	4768	MSettingIE.exe	77
PID 4768 wrote to memory of 4172	4768	MSettingIE.exe	77

C:\Users\Admin\AppData\Local\Temp\MSettingIE.exe
"C:\Users\Admin\AppData\Local\Temp\MSettingIE.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4768
- C:\Users\Admin\AppData\Local\Temp\MSettingIE.exe
  "C:\Users\Admin\AppData\Local\Temp\MSettingIE.exe"
  2⤵
  PID:4172

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/4172-3-0x0000000040000000-0x0000000040009000-memory.dmp

Download

memory/4172-5-0x0000000040000000-0x0000000040009000-memory.dmp