Analysis
-
max time kernel
13s -
max time network
9s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system -
submitted
13-09-2024 14:44
Behavioral task
behavioral1
Sample
AA_v3.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
AA_v3.exe
Resource
win10v2004-20240802-en
General
-
Target
AA_v3.exe
-
Size
798KB
-
MD5
90aadf2247149996ae443e2c82af3730
-
SHA1
050b7eba825412b24e3f02d76d7da5ae97e10502
-
SHA256
ee573647477339784dcef81024de1be1762833a20e5cc2b89a93e47d05b86b6a
-
SHA512
eec32bb82b230dd309c29712e72d4469250e651449e127479d178eddbafd5a46ec8048a753bc2c1a0fdf1dc3ed72a9453ca66fb49cbf0f95a12704e5427182be
-
SSDEEP
24576:Uj0JJ4p/A4npt3XojeQG5EtzRtO7GvmDguXd:UjoJ4u4zojegylDN
Malware Config
Signatures
-
FlawedAmmyy RAT
Remote-access trojan based on leaked code for the Ammyy remote admin software.
-
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
AA_v3.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Control Panel\International\Geo\Nation AA_v3.exe -
Loads dropped DLL 4 IoCs
Processes:
rundll32.exepid process 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe -
Writes to the Master Boot Record (MBR) 1 TTPs 2 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
Processes:
AA_v3.exeAA_v3.exedescription ioc process File opened for modification \??\PhysicalDrive0 AA_v3.exe File opened for modification \??\PhysicalDrive0 AA_v3.exe -
Drops file in System32 directory 5 IoCs
Processes:
AA_v3.exedescription ioc process File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\103621DE9CD5414CC2538780B4B75751 AA_v3.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\A82946818BB0433A7DC1AFD2189B16AF AA_v3.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\A82946818BB0433A7DC1AFD2189B16AF AA_v3.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\counters.dat AA_v3.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\103621DE9CD5414CC2538780B4B75751 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.
Processes:
AA_v3.exeAA_v3.exeAA_v3.exedescription 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 64 IoCs
Processes:
AA_v3.exedescription ioc process Set value (int) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "0" AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLs AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{DAC19DB6-26F7-4B6F-AFA3-F62EBEE73BC8}\ca-f9-26-7f-9d-2f AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy AA_v3.exe Set value (data) \REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin\hr3 = 07048d4c5aa6c743033abd473880ab32c1347572250285fa86bc646eeeb589946a0a53550aed4456baebf248dedf1bf370a73e69da7d46449ef9670c8db9e1dade90c2bea5f57a17efc285 AA_v3.exe Set value (int) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1" AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\Root\CRLs AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\Root\CTLs AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\trust\CTLs AA_v3.exe Set value (data) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\CA\CRLs AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\trust\Certificates AA_v3.exe Set value (data) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f0169000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{DAC19DB6-26F7-4B6F-AFA3-F62EBEE73BC8} AA_v3.exe Set value (int) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{DAC19DB6-26F7-4B6F-AFA3-F62EBEE73BC8}\WpadDecisionReason = "1" AA_v3.exe Set value (int) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\ca-f9-26-7f-9d-2f\WpadDecision = "0" AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\CA\Certificates AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\trust\Certificates AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\trust\CRLs AA_v3.exe Set value (int) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\ca-f9-26-7f-9d-2f\WpadDecisionReason = "1" AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\My AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\Disallowed\CRLs AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\TrustedPeople\CRLs AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\trust\CTLs AA_v3.exe Set value (data) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{DAC19DB6-26F7-4B6F-AFA3-F62EBEE73BC8}\WpadDecisionTime = 603cc773eb05db01 AA_v3.exe Set value (int) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{DAC19DB6-26F7-4B6F-AFA3-F62EBEE73BC8}\WpadDecision = "0" AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\Disallowed\CTLs AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs AA_v3.exe Set value (data) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\ca-f9-26-7f-9d-2f\WpadDecisionTime = 603cc773eb05db01 AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\CA\CRLs AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\CA\CTLs AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\CA\CTLs AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\Disallowed\CRLs AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\Disallowed\CTLs AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\SmartCardRoot\Certificates AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\trust\CRLs AA_v3.exe Set value (data) \REGISTRY\USER\.DEFAULT\SOFTWARE\Classes\Local Settings\MuiCache\2D\52C64B7E\LanguageList = 65006e002d0055005300000065006e0000000000 AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\Disallowed\Certificates AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\TrustedPeople\CTLs AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust AA_v3.exe Set value (str) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{DAC19DB6-26F7-4B6F-AFA3-F62EBEE73BC8}\WpadNetworkName = "Network 3" AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\SmartCardRoot\CRLs AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\TrustedPeople\Certificates AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin AA_v3.exe Set value (data) \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\Root\Certificates AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\TrustedPeople\Certificates AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\ca-f9-26-7f-9d-2f AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\Disallowed\Certificates AA_v3.exe -
Processes:
AA_v3.exedescription ioc process Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8\Blob = 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 AA_v3.exe Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8 AA_v3.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
Processes:
AA_v3.exepid process 3068 AA_v3.exe -
Suspicious use of SendNotifyMessage 1 IoCs
Processes:
AA_v3.exepid process 3068 AA_v3.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
AA_v3.exeAA_v3.exedescription pid process target process PID 1108 wrote to memory of 3068 1108 AA_v3.exe AA_v3.exe PID 1108 wrote to memory of 3068 1108 AA_v3.exe AA_v3.exe PID 1108 wrote to memory of 3068 1108 AA_v3.exe AA_v3.exe PID 1108 wrote to memory of 3068 1108 AA_v3.exe AA_v3.exe PID 3068 wrote to memory of 2784 3068 AA_v3.exe rundll32.exe PID 3068 wrote to memory of 2784 3068 AA_v3.exe rundll32.exe PID 3068 wrote to memory of 2784 3068 AA_v3.exe rundll32.exe PID 3068 wrote to memory of 2784 3068 AA_v3.exe rundll32.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\AA_v3.exe"C:\Users\Admin\AppData\Local\Temp\AA_v3.exe"1⤵
- Writes to the Master Boot Record (MBR)
- System Location Discovery: System Language Discovery
PID:2160
-
C:\Users\Admin\AppData\Local\Temp\AA_v3.exe"C:\Users\Admin\AppData\Local\Temp\AA_v3.exe" -service -lunch1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1108 -
C:\Users\Admin\AppData\Local\Temp\AA_v3.exe"C:\Users\Admin\AppData\Local\Temp\AA_v3.exe"2⤵
- Checks computer location settings
- Writes to the Master Boot Record (MBR)
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
- Modifies system certificate store
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:3068 -
C:\Windows\system32\rundll32.exerundll32.exe "C:\ProgramData\AMMYY\aa_nts.dll",run3⤵
- Loads dropped DLL
PID:2784
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
-
Filesize
902KB
MD5480a66902e6e7cdafaa6711e8697ff8c
SHA16ac730962e7c1dba9e2ecc5733a506544f3c8d11
SHA2567eaaaa6010bbcd6bb8c9ad08d4b0966c7aedc9b2ac24758f170012ac36e508b5
SHA5127d010cd47b7d1adf66f9c97afc6c3805997aa5c7cc6ff13eddee81f24cf2b95a3fe375ec5b3d6185c0bc8840b4ad91ae143c73a39af26391cc182ab6a1793ba5
-
Filesize
46B
MD576038623e270f399769df67a3ed15c16
SHA1ebf7d7537f45738be48e6f64d59c846b13fb4334
SHA2564dbdf4f709d50f9521e92ce5f7d4f305e2384bcda387fb2b325ff17d205bb687
SHA512a5316694d844e5b10c589f58fdf65645568b3909b2914f85c99195f9625e4124f787bc0980cff98f1e8289ff84824620a03f32cdab18e5bbcb2e59b33f397aec
-
Filesize
334B
MD5307b8fa94d4e05bcefb9eaf530052d86
SHA11b35b3598b1f8ed7148893d2eb6a3ba416b113dc
SHA256685190b35d6bf2b364732ed77191b0ac0a8d440ee7d9afdda20c48d6423cacb1
SHA512d19c516d745634b72132264d4924473292b0ea75c67dd77d0079e1eb7a41ff2bf567c5c69787cc5b3d55e2059319748edf56393b989105aba24dbaa9c2ecb81d