flawedammyy | 0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7

Analysis

max time kernel
150s
max time network
126s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
17/10/2024, 01:03

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe
Size 792KB
Sample241017-becrmsxarj
SHA256 0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7
MD5 69a8ed0b8edc940968f8535c20b4bbe4
SHA1 3557d87e895d994b7099c428b20f9088475194b5
SHA512 2e9f95743410ed2b98a022bd40f3a3bc126312a298cac7ef3dca5ce26126d4cc70c706798cabf11f1389da2605d584755872a0ad6f1ed6f210ed178b846c65da
SSDEEP 24576:uGFJJ/K/F/kpt3X8je6GrHtzRtO7GvmDgezU:uGTJ/o/u8jefyl3A
MD5 SHA1 SHA512 SSDEEP

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe

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

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Ammyy	0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin	0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr3 = fd90f3814687ef5883091165283af24ade59e4e02f065718953538996df5f63390a107a5741a3a297c224e27be2c29ad89cfe28d0c40f73b4e77d8e1090b106ccc5c1d548105a9b126ffa91d	0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin	0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE	0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4688	0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4688	0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 396 wrote to memory of 4688	396	0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe	85
PID 396 wrote to memory of 4688	396	0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe	85
PID 396 wrote to memory of 4688	396	0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe	85

C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe
"C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe"
1⤵
- Writes to the Master Boot Record (MBR)
- System Location Discovery: System Language Discovery
PID:408

C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe
"C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe" -service -lunch
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:396
- C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe
  "C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Modifies data under HKEY_USERS
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:4688

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

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

settings3.bin

Path C:\Users\Admin\AppData\Local\Temp\settings3.bin
Size 502B
SHA256 baef406883de50a5286a7ef57eb54bb5848bd0e62dd2728b1c37a2dbc60d2716
MD5 7d86496fc889b2eb67c224022bfc52a5
SHA1 888808990779509cf7d2d02a7b7029c78591f517
SHA512 976ca39fcfa189429a925b812f220b56a64e34eb5d47e124272c624cc89994e04523bfba4ed5e5605d6d473d38a67ba2b7325d162bd0fb409bf1e850b58745aa
MD5 SHA1 SHA512

Submit Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads