buer | 650750b450fd881501aa5a879696e9d61e8fcbbad479ce37b0a2bb081d73c209

Resubmissions

12-02-2021 14:19

210212-d2eq66jkpe 10

12-02-2021 13:05

210212-43tc7en5xn 10

11-02-2021 21:45

210211-9zwb32kx8e 10

Analysis

max time kernel
6s
max time network
10s
platform
windows7_x64
resource
win7v20201028
submitted
11-02-2021 21:45

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Report Analysis Logs

General

Target

SCD10093264.jpg.exe
Size

116KB
MD5

69819de123d7b83d5881932d706841f5
SHA1

27fe7625cb44c9870fdaf810ec42cb02a0191c86
SHA256

650750b450fd881501aa5a879696e9d61e8fcbbad479ce37b0a2bb081d73c209
SHA512

fdd8578698fbcd278ee0c6820d57b834fd20a9172d8652ddbfd02b12b8f8f63845af01401838ef9b8c342fab919c74da53e4062271c157eb5bfa67a22ec9b907

Score

10^/10

buer loader

Malware Config

Extracted

Family

buer

antipublicwestbank.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
behavioral1/memory/1348-5-0x0000000040000000-0x000000004000A000-memory.dmp	buer

Loads dropped DLL 1 IoCs

pid	Process
844	SCD10093264.jpg.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 844 set thread context of 1348	844	SCD10093264.jpg.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
844	SCD10093264.jpg.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 844 wrote to memory of 1348	844	SCD10093264.jpg.exe	29
PID 844 wrote to memory of 1348	844	SCD10093264.jpg.exe	29
PID 844 wrote to memory of 1348	844	SCD10093264.jpg.exe	29
PID 844 wrote to memory of 1348	844	SCD10093264.jpg.exe	29
PID 844 wrote to memory of 1348	844	SCD10093264.jpg.exe	29

C:\Users\Admin\AppData\Local\Temp\SCD10093264.jpg.exe
"C:\Users\Admin\AppData\Local\Temp\SCD10093264.jpg.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:844
- C:\Users\Admin\AppData\Local\Temp\SCD10093264.jpg.exe
  "C:\Users\Admin\AppData\Local\Temp\SCD10093264.jpg.exe"
  2⤵
  PID:1348

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/844-2-0x0000000076881000-0x0000000076883000-memory.dmp

Filesize
8KB

Download
memory/1348-5-0x0000000040000000-0x000000004000A000-memory.dmp

Filesize
40KB

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