flawedammyy | ee573647477339784dcef81024de1be1762833a20e5cc2b89a93e47d05b86b6a

Analysis

max time kernel
120s
max time network
128s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
29-02-2024 12:33

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General

Target

tmp.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:

tmp.exe

description ioc process

File opened for modification \??\PhysicalDrive0 tmp.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

tmp.exe

pid process

3020 tmp.exe

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

pid	process
3020	tmp.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

tmp.exe

description	pid	process	target process
PID 2660 wrote to memory of 3020	2660	tmp.exe	tmp.exe
PID 2660 wrote to memory of 3020	2660	tmp.exe	tmp.exe
PID 2660 wrote to memory of 3020	2660	tmp.exe	tmp.exe
PID 2660 wrote to memory of 3020	2660	tmp.exe	tmp.exe

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Writes to the Master Boot Record (MBR)
PID:2956

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe" -service -lunch
1⤵
- Suspicious use of WriteProcessMemory
PID:2660

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
2⤵
- Suspicious behavior: GetForegroundWindowSpam
PID:3020

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\ProgramData\AMMYY\settings3.bin
Filesize
327B

MD5
b96a5366a308ffd7ef39dc5ab5de3158

SHA1
abd83482d6c32a0acdac3b16402d89f4409be40c

SHA256
0817d9102fdd2bd69e0d837d3d905e21e18e893c67489f060780f5a83f5c3bd3

SHA512
8f9f014f8e7a2a4f5efc2c5e8e883ea59f175a6b9aac5474258cd44211bdb1c9ad4f5f63b871f2b1f461c1fdf4e07e0856dd09ea5757524a86a47e193a235bd6

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