buer | e81d26edffa4b4570584bd1cb36211587108dfbbfc24f303a2c3e261cc3c59c1

Analysis

max time kernel
120s
max time network
120s
platform
windows7_x64
resource
win7v20201028
submitted
02-02-2021 15:29

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General

Target

windowsphoto.exe
Size

83KB
MD5

f7fc343cbf86f08c7b529ab451677752
SHA1

1ef5d87b03502389362fa7a2aa3931b5e3e34353
SHA256

e81d26edffa4b4570584bd1cb36211587108dfbbfc24f303a2c3e261cc3c59c1
SHA512

c77f3ac253edd3f2bdd23593c098d5de2e4fdeae7f8dadb04a1da49a8d984b4a790a9a0e538eafad7e22075b9f6527cc387dc8c4920f15fcaa09c4048a1e0a37

Score

10^/10

buer loader

Malware Config

Extracted

Family

buer

tokacpebanking.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/1480-5-0x0000000040000000-0x000000004000A000-memory.dmp	buer

Loads dropped DLL 1 IoCs

pid	Process
528	windowsphoto.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 528 set thread context of 1480	528	windowsphoto.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
528	windowsphoto.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 528 wrote to memory of 1480	528	windowsphoto.exe	29
PID 528 wrote to memory of 1480	528	windowsphoto.exe	29
PID 528 wrote to memory of 1480	528	windowsphoto.exe	29
PID 528 wrote to memory of 1480	528	windowsphoto.exe	29
PID 528 wrote to memory of 1480	528	windowsphoto.exe	29

C:\Users\Admin\AppData\Local\Temp\windowsphoto.exe
"C:\Users\Admin\AppData\Local\Temp\windowsphoto.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:528
- C:\Users\Admin\AppData\Local\Temp\windowsphoto.exe
  "C:\Users\Admin\AppData\Local\Temp\windowsphoto.exe"
  2⤵
  PID:1480

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/528-2-0x0000000075D01000-0x0000000075D03000-memory.dmp

Filesize
8KB

Download
memory/1480-5-0x0000000040000000-0x000000004000A000-memory.dmp

Filesize
40KB

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