flawedammyy | ee573647477339784dcef81024de1be1762833a20e5cc2b89a93e47d05b86b6a

Analysis

max time kernel
120s
max time network
124s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
21-02-2024 18:18

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General

Target

AA_v3.exe
Size

798KB
MD5

90aadf2247149996ae443e2c82af3730
SHA1

050b7eba825412b24e3f02d76d7da5ae97e10502
SHA256

ee573647477339784dcef81024de1be1762833a20e5cc2b89a93e47d05b86b6a
SHA512

eec32bb82b230dd309c29712e72d4469250e651449e127479d178eddbafd5a46ec8048a753bc2c1a0fdf1dc3ed72a9453ca66fb49cbf0f95a12704e5427182be
SSDEEP

24576:Uj0JJ4p/A4npt3XojeQG5EtzRtO7GvmDguXd:UjoJ4u4zojegylDN

Score

10^/10

flawedammyy bootkit persistence trojan

Malware Config

Signatures

FlawedAmmyy RAT
Remote-access trojan based on leaked code for the Ammyy remote admin software.
trojan flawedammyy

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

Processes:

AA_v3.exe

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	AA_v3.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

AA_v3.exe

pid	Process
3040	AA_v3.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

AA_v3.exe

description	pid	Process	procid_target
PID 2264 wrote to memory of 3040	2264	AA_v3.exe	29
PID 2264 wrote to memory of 3040	2264	AA_v3.exe	29
PID 2264 wrote to memory of 3040	2264	AA_v3.exe	29
PID 2264 wrote to memory of 3040	2264	AA_v3.exe	29

C:\Users\Admin\AppData\Local\Temp\AA_v3.exe
"C:\Users\Admin\AppData\Local\Temp\AA_v3.exe"
1⤵
- Writes to the Master Boot Record (MBR)
PID:1300

C:\Users\Admin\AppData\Local\Temp\AA_v3.exe
"C:\Users\Admin\AppData\Local\Temp\AA_v3.exe" -service -lunch
1⤵
- Suspicious use of WriteProcessMemory
PID:2264
- C:\Users\Admin\AppData\Local\Temp\AA_v3.exe
  "C:\Users\Admin\AppData\Local\Temp\AA_v3.exe"
  2⤵
  - Suspicious behavior: GetForegroundWindowSpam
  PID:3040

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Defense Evasion

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\AMMYY\settings3.bin

Filesize
327B

MD5
a12a71e16bf88e0fd7f9a2d3743be38e

SHA1
fc05715f3ede9667feeca43760d3dbf024ea83ea

SHA256
9d0859a8ab7de3648484ed0cf7af9c8bebe1eafac4a3f184d69e32307aa5b1a3

SHA512
5fa89e9a37fbdcbd44539d9bd9f219eb0537c9e8ca08cb9948abb3627ce354620e936f5ab675778c915e640d385b15ffce35509da78cc69ca2d411104f48ee8a

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