flawedammyy | 0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7

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-1-5-21-1506706701-1246725540-2219210854-1000\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 6 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin	0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE	0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe
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 = 3355db6e802f69b65e6d4532ce53409496f264b98e5756122c9af2337c23b9e29c19204166159e059c5524ffd1d694126934935536edd05e87af8976b878236495c59ed6f0	0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2260	0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2260	0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1280 wrote to memory of 2260	1280	0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe	30
PID 1280 wrote to memory of 2260	1280	0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe	30
PID 1280 wrote to memory of 2260	1280	0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe	30
PID 1280 wrote to memory of 2260	1280	0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe	30

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:2528

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:1280
- 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:2260

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Privilege Escalation

Defense Evasion

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
495B

MD5
8c901e3119bfb7ad19ad424047908d2b

SHA1
023052d735ab1621eb5fad203210f99990f10407

SHA256
6e6e2cd29f5b4dbf7fff2436d8f00e6dca7fc842fbba33f141650a59ca08fcf5

SHA512
390e76d79ee111c72660ff72fad92015aada933e32f4e7094d6adc065d56ec84aee839edf8db8110f1cd360454366527a9378738b750453ed22d1b10d8ca4bb1

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads