flawedammyy | 9eb5ff781349981303805f00b97afb2a4ef551ba2906a1544332642d71713cae

Analysis

max time kernel
150s
max time network
146s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
29-09-2024 02:13

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General

Target

AA_v3.exe
Size

755KB
MD5

11bc606269a161555431bacf37f7c1e4
SHA1

63c52b0ac68ab7464e2cd777442a5807db9b5383
SHA256

1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed
SHA512

0be867fce920d493d2a37f996627bceea87621ba4071ae4383dd4a24748eedf7dc5ca6db089217b82ec38870248c6840f785683bf359d1014c7109e7d46dd90f
SSDEEP

12288:XVFUEuNmwvGrw9i0aTGRGicBckyyFRtWY1i3FTsvOVV0gz:3UEUUw9RaTNicBrPFRtJ1iVTsC5z

Score

10^/10

flawedammyy discovery 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-1-5-21-457978338-2990298471-2379561640-1000\Control Panel\International\Geo\Nation	AA_v3.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	AA_v3.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AA_v3.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AA_v3.exe

Modifies data under HKEY_USERS 6 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	AA_v3.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin	AA_v3.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE	AA_v3.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy	AA_v3.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin\hr = 537d567366087c6658524c175253b71463715d4db36b	AA_v3.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin\hr3 = c6ba57b6abf8c602055f052bf63cf1d7d453ff512ea4de487df76c564cd22cb40d94a1591a0d8c86fbdb0a521110a8ecabd1c346a056b7b0942f031f8b7a153da1245be9f7aea3ff80fe33	AA_v3.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2716	AA_v3.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2716	AA_v3.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2812 wrote to memory of 2716	2812	AA_v3.exe	31
PID 2812 wrote to memory of 2716	2812	AA_v3.exe	31
PID 2812 wrote to memory of 2716	2812	AA_v3.exe	31
PID 2812 wrote to memory of 2716	2812	AA_v3.exe	31

C:\Users\Admin\AppData\Local\Temp\AA_v3.exe
"C:\Users\Admin\AppData\Local\Temp\AA_v3.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:2708

C:\Users\Admin\AppData\Local\Temp\AA_v3.exe
"C:\Users\Admin\AppData\Local\Temp\AA_v3.exe" -service -lunch
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2812
- C:\Users\Admin\AppData\Local\Temp\AA_v3.exe
  "C:\Users\Admin\AppData\Local\Temp\AA_v3.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:2716

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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:\ProgramData\AMMYY\hr

Filesize
22B

MD5
f87a823e0b89ee47ba7c55311181c528

SHA1
f41e8fd1ae3c7aa693d65682993617d91662d664

SHA256
1c19ef43a0f60d50c4ee5d7feeb1e81a58e55a5a9575c566c33886e648e74967

SHA512
f974851206adb40ffe13710c6c4ac4360dad21f97a7ad0f17fbfab683ddb3779cbb17b288ff460e567510cfb3ff47e6463bbefa99e7995e7f08ba7143165f116

Download Submit
C:\ProgramData\AMMYY\hr3

Filesize
75B

MD5
5f5e6f655d164781a48714c117244c26

SHA1
690f07212bafb7ed11b3c65a61014094014b1b29

SHA256
b397503d4df31f3f6392213f84b54a2c0eaf5d9b1fcc471e4e6539636c3fba3d

SHA512
fda21c391bfd5351bc7f3ec66b6811c19fe2709b6c6f6cecfe32c2c73f978a205651f1f15a6f87f2505d122a0df5f2d64da482b267467bf68f46eefd8386be39

Download Submit
C:\ProgramData\AMMYY\settings3.bin

Filesize
271B

MD5
714f2508d4227f74b6adacfef73815d8

SHA1
a35c8a796e4453c0c09d011284b806d25bdad04c

SHA256
a5579945f23747541c0e80b79e79375d4ca44feafcd425ee9bd9302e35312480

SHA512
1171a6eac6d237053815a40c2bcc2df9f4209902d6157777377228f3b618cad50c88a9519444ed5c447cf744e4655272fb42dabb567df85b4b19b1a2f1d086d8

Download Submit