buer | 41a4ee153b3c61cc8ed50de571e5b8f884de1c8c07332b7b31f238360832988c

Resubmissions

12-02-2021 16:10

210212-y931k5cqtn 10

10-02-2021 20:48

210210-yxgp15f1tx 10

Analysis

max time kernel
91s
max time network
92s
platform
windows7_x64
resource
win7v20201028
submitted
10-02-2021 20:48

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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.

Processes:

resource	yara_rule
behavioral1/memory/1724-5-0x0000000040000000-0x000000004000A000-memory.dmp	buer

Loads dropped DLL 1 IoCs

Processes:

SCD10093264.jpg.exe

pid process

2008 SCD10093264.jpg.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

SCD10093264.jpg.exe

description pid process target process

PID 2008 set thread context of 1724 2008 SCD10093264.jpg.exe SCD10093264.jpg.exe
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

Processes:

SCD10093264.jpg.exe

pid process

2008 SCD10093264.jpg.exe

pid	process
2008	SCD10093264.jpg.exe

description	pid	process	target process
PID 2008 set thread context of 1724	2008	SCD10093264.jpg.exe	SCD10093264.jpg.exe

pid	process
2008	SCD10093264.jpg.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

SCD10093264.jpg.exe

description	pid	process	target process
PID 2008 wrote to memory of 1724	2008	SCD10093264.jpg.exe	SCD10093264.jpg.exe
PID 2008 wrote to memory of 1724	2008	SCD10093264.jpg.exe	SCD10093264.jpg.exe
PID 2008 wrote to memory of 1724	2008	SCD10093264.jpg.exe	SCD10093264.jpg.exe
PID 2008 wrote to memory of 1724	2008	SCD10093264.jpg.exe	SCD10093264.jpg.exe
PID 2008 wrote to memory of 1724	2008	SCD10093264.jpg.exe	SCD10093264.jpg.exe

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:2008
- C:\Users\Admin\AppData\Local\Temp\SCD10093264.jpg.exe
  "C:\Users\Admin\AppData\Local\Temp\SCD10093264.jpg.exe"
  2⤵
  PID:1724

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

\Users\Admin\AppData\Local\Temp\nsx3100.tmp\System.dll

MD5
fccff8cb7a1067e23fd2e2b63971a8e1

SHA1
30e2a9e137c1223a78a0f7b0bf96a1c361976d91

SHA256
6fcea34c8666b06368379c6c402b5321202c11b00889401c743fb96c516c679e

SHA512
f4335e84e6f8d70e462a22f1c93d2998673a7616c868177cac3e8784a3be1d7d0bb96f2583fa0ed82f4f2b6b8f5d9b33521c279a42e055d80a94b4f3f1791e0c

Download Submit
memory/1724-4-0x000000004000626A-mapping.dmp

Download
memory/1724-5-0x0000000040000000-0x000000004000A000-memory.dmp

Filesize
40KB

Download
memory/2008-2-0x0000000075EA1000-0x0000000075EA3000-memory.dmp

Filesize
8KB

Download