buer | 41a4ee153b3c61cc8ed50de571e5b8f884de1c8c07332b7b31f238360832988c

Analysis

max time kernel
9s
max time network
8s
platform
windows7_x64
resource
win7v20201028
submitted
10-02-2021 20:47

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General

Target

SCD10093264.jpg.exe
Size

104KB
MD5

1fa27c5e084887e9e3a2e232d27e10e3
SHA1

a7c98a694753ed745e8618369d16e39c46cca1e7
SHA256

41a4ee153b3c61cc8ed50de571e5b8f884de1c8c07332b7b31f238360832988c
SHA512

81ecb5e4b3ea478f27509d1eafd106ec224fc0ccdfd411cb3b2345fc752d738f6300fd575a2941611e1763dce125364fb765a48835249cd7e7e33e28a01f40b5

Score

10^/10

buer loader

Malware Config

Extracted

Family

buer

dtermalherbhos.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/1624-5-0x0000000040000000-0x000000004000A000-memory.dmp	buer

Loads dropped DLL 1 IoCs

pid	Process
1832	SCD10093264.jpg.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1832 set thread context of 1624	1832	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
1832	SCD10093264.jpg.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1832 wrote to memory of 1624	1832	SCD10093264.jpg.exe	29
PID 1832 wrote to memory of 1624	1832	SCD10093264.jpg.exe	29
PID 1832 wrote to memory of 1624	1832	SCD10093264.jpg.exe	29
PID 1832 wrote to memory of 1624	1832	SCD10093264.jpg.exe	29
PID 1832 wrote to memory of 1624	1832	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:1832
- C:\Users\Admin\AppData\Local\Temp\SCD10093264.jpg.exe
  "C:\Users\Admin\AppData\Local\Temp\SCD10093264.jpg.exe"
  2⤵
  PID:1624

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/1624-5-0x0000000040000000-0x000000004000A000-memory.dmp

Filesize
40KB

Download
memory/1832-2-0x0000000075DE1000-0x0000000075DE3000-memory.dmp

Filesize
8KB

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