flawedammyy | ee573647477339784dcef81024de1be1762833a20e5cc2b89a93e47d05b86b6a

Analysis

max time kernel
92s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
06-08-2024 08:12

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General

Target

rh111.exe
Size

798KB
MD5

90aadf2247149996ae443e2c82af3730
SHA1

050b7eba825412b24e3f02d76d7da5ae97e10502
SHA256

ee573647477339784dcef81024de1be1762833a20e5cc2b89a93e47d05b86b6a
SHA512

eec32bb82b230dd309c29712e72d4469250e651449e127479d178eddbafd5a46ec8048a753bc2c1a0fdf1dc3ed72a9453ca66fb49cbf0f95a12704e5427182be
SSDEEP

24576:Uj0JJ4p/A4npt3XojeQG5EtzRtO7GvmDguXd:UjoJ4u4zojegylDN

Score

10^/10

flawedammyy bootkit discovery 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:

rh111.exe

description ioc process

File opened for modification \??\PhysicalDrive0 rh111.exe

description	ioc	process
File opened for modification	\??\PhysicalDrive0	rh111.exe

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

rh111.exerh111.exerh111.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rh111.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rh111.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rh111.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

rh111.exe

description	pid	process	target process
PID 1504 wrote to memory of 2936	1504	rh111.exe	rh111.exe
PID 1504 wrote to memory of 2936	1504	rh111.exe	rh111.exe
PID 1504 wrote to memory of 2936	1504	rh111.exe	rh111.exe

C:\Users\Admin\AppData\Local\Temp\rh111.exe
"C:\Users\Admin\AppData\Local\Temp\rh111.exe"
1⤵
- Writes to the Master Boot Record (MBR)
- System Location Discovery: System Language Discovery
PID:4544

C:\Users\Admin\AppData\Local\Temp\rh111.exe
"C:\Users\Admin\AppData\Local\Temp\rh111.exe" -service -lunch
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1504
- C:\Users\Admin\AppData\Local\Temp\rh111.exe
  "C:\Users\Admin\AppData\Local\Temp\rh111.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2936

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\AMMYY\settings3.bin

Filesize
334B

MD5
cd729f2fe267badbc9b8ed79b03da8be

SHA1
9ddc27d2660535d1f801c8281542d5ac398b2f6b

SHA256
f123881e6f80c32a0742ec4aca63a3cfcf2e22e30bf59ef24bf0b0315b3ccec4

SHA512
9d50b5713aa3ea852926891576b624a74535b18af5d90f1aad627916b14e72d7c798db7bea13b72a6cd1babca56a5220d9f7b27aa116994602d3c25a579ded90

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