flawedammyy | ee573647477339784dcef81024de1be1762833a20e5cc2b89a93e47d05b86b6a

Analysis

max time kernel
119s
max time network
119s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
26-02-2024 13:27

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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

2404 AA_v3.exe

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

pid	process
2404	AA_v3.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

AA_v3.exe

description	pid	process	target process
PID 2352 wrote to memory of 2404	2352	AA_v3.exe	AA_v3.exe
PID 2352 wrote to memory of 2404	2352	AA_v3.exe	AA_v3.exe
PID 2352 wrote to memory of 2404	2352	AA_v3.exe	AA_v3.exe
PID 2352 wrote to memory of 2404	2352	AA_v3.exe	AA_v3.exe

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:2088

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:2352

C:\Users\Admin\AppData\Local\Temp\AA_v3.exe
"C:\Users\Admin\AppData\Local\Temp\AA_v3.exe"
2⤵
- Suspicious behavior: GetForegroundWindowSpam
PID:2404

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
27616b65d0e8556da1d30338eebaba41

SHA1
495f46cf09bc8a1c41f7cf35634fb5bfae5cbff9

SHA256
55430e415c1357ea25b900ef4b3b40ece09c031ef09fc71dddcc592c49e9c72b

SHA512
175d1b1a1b7975a64c7c6c850188d9a445b7e20fa2b8d44e4f82ab77d4a5e19b36ab413126137839b21ea6a688abf0ab6a39e28511291434268ff00a30e7424e

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