buer | 044c16cdbc6ec18f58bfecaacf4d4e21150a19d8d10c694c4a4c3085697499a2

Analysis

max time kernel
16s
max time network
13s
platform
windows7_x64
resource
win7v20201028
submitted
04-01-2021 02:13

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General

Target

146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe

Score

10^/10

buer loader

Malware Config

Extracted

Family

buer

softwareconsbank.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/1660-3-0x0000000040000000-0x0000000040009000-memory.dmp	buer
behavioral1/memory/1660-4-0x0000000040005DA8-mapping.dmp	buer
behavioral1/memory/1660-5-0x0000000040000000-0x0000000040009000-memory.dmp	buer

Loads dropped DLL 1 IoCs

pid	Process
1336	146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1336 set thread context of 1660	1336	146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.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
1336	146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1336 wrote to memory of 1660	1336	146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe	29
PID 1336 wrote to memory of 1660	1336	146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe	29
PID 1336 wrote to memory of 1660	1336	146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe	29
PID 1336 wrote to memory of 1660	1336	146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe	29
PID 1336 wrote to memory of 1660	1336	146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe	29

C:\Users\Admin\AppData\Local\Temp\146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe
"C:\Users\Admin\AppData\Local\Temp\146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1336
- C:\Users\Admin\AppData\Local\Temp\146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe
  "C:\Users\Admin\AppData\Local\Temp\146bcd0d720f43d289c66d3a3cdc77e5e5a3d924174ee1993ac6db2cb0ca8026.exe"
  2⤵
  PID:1660

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/1660-3-0x0000000040000000-0x0000000040009000-memory.dmp

Filesize
36KB

Download
memory/1660-5-0x0000000040000000-0x0000000040009000-memory.dmp

Filesize
36KB

Download