Analysis
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max time kernel
150s -
max time network
140s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system -
submitted
16-01-2025 10:08
Behavioral task
behavioral1
Sample
AA_v3.5.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
AA_v3.5.exe
Resource
win10v2004-20241007-en
General
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Target
AA_v3.5.exe
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Size
746KB
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MD5
f8cd52b70a11a1fb3f29c6f89ff971ec
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SHA1
6a0c46818a6a10c2c5a98a0cce65fbaf95caa344
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SHA256
6f2258383b92bfaf425f49fc7a5901bfa97a334de49ce015cf65396125c13d20
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SHA512
987b6b288a454b6198d4e7f94b7bba67cafe37f9654cd3cd72134a85958efd2125596ae48e66a8ee49ee3f4199dac7f136e1831f2bf4015f25d2980f0b866abe
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SSDEEP
12288:PUYpJqMH2OwlaUPcWWw5XZV8f64RteVpN5ETMasTjcP6gX:zpJJWOwlaUPcWWwRZb4Rt+N5WMasHoX
Malware Config
Signatures
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FlawedAmmyy RAT
Remote-access trojan based on leaked code for the Ammyy remote admin software.
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Flawedammyy family
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-4177215427-74451935-3209572229-1000\Control Panel\International\Geo\Nation AA_v3.5.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.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language AA_v3.5.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language AA_v3.5.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language AA_v3.5.exe -
Modifies data under HKEY_USERS 6 IoCs
description ioc Process Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings AA_v3.5.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin AA_v3.5.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE AA_v3.5.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy AA_v3.5.exe Set value (data) \REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin\hr = 537d567366087c6658524c175253a77c3697b638b36b AA_v3.5.exe Set value (data) \REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin\hr3 = cad04d6c89c5db22345bfce8f2fab2000e572ad5a9abd2cd03968648af901891f85b71767a81a48eb86dfbd3704f4e010f60b7c716c4e76fffc252b12fdbf75132debe8eacf4d2fbda7026 AA_v3.5.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 2976 AA_v3.5.exe -
Suspicious use of SendNotifyMessage 1 IoCs
pid Process 2976 AA_v3.5.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 2972 wrote to memory of 2976 2972 AA_v3.5.exe 31 PID 2972 wrote to memory of 2976 2972 AA_v3.5.exe 31 PID 2972 wrote to memory of 2976 2972 AA_v3.5.exe 31 PID 2972 wrote to memory of 2976 2972 AA_v3.5.exe 31
Processes
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C:\Users\Admin\AppData\Local\Temp\AA_v3.5.exe"C:\Users\Admin\AppData\Local\Temp\AA_v3.5.exe"1⤵
- System Location Discovery: System Language Discovery
PID:2100
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C:\Users\Admin\AppData\Local\Temp\AA_v3.5.exe"C:\Users\Admin\AppData\Local\Temp\AA_v3.5.exe" -service -lunch1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2972 -
C:\Users\Admin\AppData\Local\Temp\AA_v3.5.exe"C:\Users\Admin\AppData\Local\Temp\AA_v3.5.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:2976
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
22B
MD5aae744d5480be5389cc0b5be553288ea
SHA1d401927b84016f0948300e215bdc914ddcc42aa0
SHA256f12a1d119ec59641a749cbe620cb6e03bbaa671051250fce52fc7a5b9ed9aa61
SHA512abf294b4d6a0cd4b3240952c3ea16c05641f4e052a852be3141d32f240ebe39ba7b8525da823df1eccc6818285db12ba5c5a99d0e8e4e8f4234a64fac01785d8
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Filesize
75B
MD56824c62caa4d28dddb9e5fe721dce72e
SHA10069662101d642c96ba08ba378e0277a961c4c4b
SHA256fe57907c02fed78983613738a1f64543b678d250c0f97677b4f69c307d851924
SHA512b73814fc6cf7204a05a6ae91fba9b5a2300ccc00f3dc4b87e87114c8f7b55c94625c8eb088b6ac004ce089f5aa2ec1e343ca80121e58ac0239e6765870d777d2
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Filesize
271B
MD5714f2508d4227f74b6adacfef73815d8
SHA1a35c8a796e4453c0c09d011284b806d25bdad04c
SHA256a5579945f23747541c0e80b79e79375d4ca44feafcd425ee9bd9302e35312480
SHA5121171a6eac6d237053815a40c2bcc2df9f4209902d6157777377228f3b618cad50c88a9519444ed5c447cf744e4655272fb42dabb567df85b4b19b1a2f1d086d8