Analysis
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max time kernel
10s -
max time network
84s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
05-01-2024 07:21
Behavioral task
behavioral1
Sample
AA_v3.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
AA_v3.exe
Resource
win10v2004-20231215-en
General
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Target
AA_v3.exe
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Size
755KB
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MD5
11bc606269a161555431bacf37f7c1e4
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SHA1
63c52b0ac68ab7464e2cd777442a5807db9b5383
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SHA256
1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed
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SHA512
0be867fce920d493d2a37f996627bceea87621ba4071ae4383dd4a24748eedf7dc5ca6db089217b82ec38870248c6840f785683bf359d1014c7109e7d46dd90f
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SSDEEP
12288:XVFUEuNmwvGrw9i0aTGRGicBckyyFRtWY1i3FTsvOVV0gz:3UEUUw9RaTNicBrPFRtJ1iVTsC5z
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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Drops file in System32 directory 4 IoCs
Processes:
AA_v3.exedescription ioc process File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5 AA_v3.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE AA_v3.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies AA_v3.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5 AA_v3.exe -
Modifies data under HKEY_USERS 9 IoCs
Processes:
AA_v3.exedescription ioc process Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix AA_v3.exe Key created \REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin AA_v3.exe Set value (data) \REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr = 537d56736608796d5b5b4e155253a6332c6de160b26b AA_v3.exe Set value (data) \REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr3 = b59d2b42074ad24f8fe71eae591d8eb598e51a2d28c594f8f1e6b1e79867edc50a84e9f15414123b3efcf4103308dfeb5d1727b9b3c7e7267b4d8a0be3bbddc33a11e0a5 AA_v3.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:" AA_v3.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:" 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 -
Suspicious use of FindShellTrayWindow 1 IoCs
Processes:
AA_v3.exepid process 4696 AA_v3.exe -
Suspicious use of SendNotifyMessage 1 IoCs
Processes:
AA_v3.exepid process 4696 AA_v3.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
AA_v3.exedescription pid process target process PID 3660 wrote to memory of 4696 3660 AA_v3.exe AA_v3.exe PID 3660 wrote to memory of 4696 3660 AA_v3.exe AA_v3.exe PID 3660 wrote to memory of 4696 3660 AA_v3.exe AA_v3.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\AA_v3.exe"C:\Users\Admin\AppData\Local\Temp\AA_v3.exe"1⤵PID:4812
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C:\Users\Admin\AppData\Local\Temp\AA_v3.exe"C:\Users\Admin\AppData\Local\Temp\AA_v3.exe" -service -lunch1⤵
- Suspicious use of WriteProcessMemory
PID:3660 -
C:\Users\Admin\AppData\Local\Temp\AA_v3.exe"C:\Users\Admin\AppData\Local\Temp\AA_v3.exe"2⤵
- Drops file in System32 directory
- Modifies data under HKEY_USERS
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:4696
Network
MITRE ATT&CK Matrix
Replay Monitor
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Downloads
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Filesize
22B
MD58c138817d56f2158a930b4d1317a5e2b
SHA1d24f12079ae2e41a56b707024d9d5de70093fdd8
SHA256710b3369c0737cc720da2815b5197b8d1b2d810281c98a45db1c8cd044488442
SHA512e79573195010d030f96f5cb1bfbd027351bb4c2bbc77643ff82d5cdf836ff5901065262a829ae15276513b2f4789ed4b0fc7f5fa55097841a612382e46303f6b
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Filesize
68B
MD5bd3e7f25b0cf0884014638a6dc456eb6
SHA1a0b5278d742d548c6944ecd361eacacc73c9e0c9
SHA256408543ef43c8634df8940b3df23e8c12a6542d6b4482c80be5e4174d94842d00
SHA5120a73c49461b0a447686c8759ba1b5493e3ccbc5f794820fd6a05e68db26855d936ae70d3b5438299cc5c87f36f6ad27dde200f4a387d5ad1aff57b6e53d8a567
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Filesize
271B
MD5714f2508d4227f74b6adacfef73815d8
SHA1a35c8a796e4453c0c09d011284b806d25bdad04c
SHA256a5579945f23747541c0e80b79e79375d4ca44feafcd425ee9bd9302e35312480
SHA5121171a6eac6d237053815a40c2bcc2df9f4209902d6157777377228f3b618cad50c88a9519444ed5c447cf744e4655272fb42dabb567df85b4b19b1a2f1d086d8