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

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General

Target

0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe
Size

792KB
MD5

69a8ed0b8edc940968f8535c20b4bbe4
SHA1

3557d87e895d994b7099c428b20f9088475194b5
SHA256

0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7
SHA512

2e9f95743410ed2b98a022bd40f3a3bc126312a298cac7ef3dca5ce26126d4cc70c706798cabf11f1389da2605d584755872a0ad6f1ed6f210ed178b846c65da
SSDEEP

24576:uGFJJ/K/F/kpt3X8je6GrHtzRtO7GvmDgezU:uGTJ/o/u8jefyl3A

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\settings3.bin

Filesize
502B

MD5
7d86496fc889b2eb67c224022bfc52a5

SHA1
888808990779509cf7d2d02a7b7029c78591f517

SHA256
baef406883de50a5286a7ef57eb54bb5848bd0e62dd2728b1c37a2dbc60d2716

SHA512
976ca39fcfa189429a925b812f220b56a64e34eb5d47e124272c624cc89994e04523bfba4ed5e5605d6d473d38a67ba2b7325d162bd0fb409bf1e850b58745aa

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads