flawedammyy | 0a7e27421e535b074b4fc4a7abc742ff232149a120a928a011f5428ace1413df

Analysis

max time kernel
150s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20230703-en
resource tags

arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
submitted
07-07-2023 09:46

Target

Device/HarddiskVolume6/Downloads/AA_v3.5.exe
Size

746KB
MD5

2cbf5657ffd8858a9597f296a60270c2
SHA1

b130611c92788337c4f6bb9e9454ff06eb409166
SHA256

9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac
SHA512

06339a299c8c9ce55e9b96582e54e0bf9e04f894ceb47c07486adf8b0140c2a01fd0932207aca8112ee0b16ba8711fee9435e37339aafb94f167b5a736ee7d0b
SSDEEP

12288:6NgEvTkYGzXUMA7PTgM0YOg26y4RtcxcUwhqb3omaY80NP6gL:6XTszE7PTgM0YOgA4RtcbwhsSYFVL

Score

10^/10

FlawedAmmyy RAT
Remote-access trojan based on leaked code for the Ammyy remote admin software.
trojan flawedammyy

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5	AA_v3.5.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE	AA_v3.5.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies	AA_v3.5.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5	AA_v3.5.exe

Modifies data under HKEY_USERS 9 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	AA_v3.5.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Ammyy	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\Admin	AA_v3.5.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr = 537d56736608796d5b5b4e15525300e371d3ffefb16b	AA_v3.5.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr3 = 15c42620fb7601267c1cd24f12855d45c3346778361fe404b4e2a9e5b2a20b36f677d08f26a9339875a46952be852314ee76b6dfaa9ac125a19280933d0b465cda581089	AA_v3.5.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	AA_v3.5.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	AA_v3.5.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2404	AA_v3.5.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2404	AA_v3.5.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 5084 wrote to memory of 2404	5084	AA_v3.5.exe	85
PID 5084 wrote to memory of 2404	5084	AA_v3.5.exe	85
PID 5084 wrote to memory of 2404	5084	AA_v3.5.exe	85

C:\Users\Admin\AppData\Local\Temp\Device\HarddiskVolume6\Downloads\AA_v3.5.exe
"C:\Users\Admin\AppData\Local\Temp\Device\HarddiskVolume6\Downloads\AA_v3.5.exe"
1⤵
PID:3344

C:\Users\Admin\AppData\Local\Temp\Device\HarddiskVolume6\Downloads\AA_v3.5.exe
"C:\Users\Admin\AppData\Local\Temp\Device\HarddiskVolume6\Downloads\AA_v3.5.exe" -service -lunch
1⤵
- Suspicious use of WriteProcessMemory
PID:5084
- C:\Users\Admin\AppData\Local\Temp\Device\HarddiskVolume6\Downloads\AA_v3.5.exe
  "C:\Users\Admin\AppData\Local\Temp\Device\HarddiskVolume6\Downloads\AA_v3.5.exe"
  2⤵
  - Drops file in System32 directory
  - Modifies data under HKEY_USERS
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:2404

C:\ProgramData\AMMYY\hr

Filesize
22B

MD5
96f4014aec86c615ee79a9939f63935c

SHA1
6d5502853255fe96d1009f49802b360134fc780c

SHA256
6e6d86c34d81cb039c9660daf416979f7f4489be2c9b1b35a630ef8cb1bd2c49

SHA512
e4265ac2b1191c4269c9f10e4416ffca79aa3be3da0426e22e615654f995f64a37f75e0b3419637594737e2dd26f339dff17991812af551a52f55420d64a7dd7

Download Submit
C:\ProgramData\AMMYY\hr3

Filesize
68B

MD5
0989260f19012d8d3181f564962ff303

SHA1
22a3b48268604f1c2a3ae93f111313a76aa0af59

SHA256
77ea0d8b571f718d3528cd38d63cdfdc521d7db344a49a782a4ed762cf37ecd1

SHA512
aaaadfa323fddb4fccbf5a349ab60abb5d6be05b91e28bb3cad292d1bc9f5e17c636704b10f728406cf52d310a46802a613b067a45ca0b3edc693e4e7fa89e30

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

Filesize
271B

MD5
714f2508d4227f74b6adacfef73815d8

SHA1
a35c8a796e4453c0c09d011284b806d25bdad04c

SHA256
a5579945f23747541c0e80b79e79375d4ca44feafcd425ee9bd9302e35312480

SHA512
1171a6eac6d237053815a40c2bcc2df9f4209902d6157777377228f3b618cad50c88a9519444ed5c447cf744e4655272fb42dabb567df85b4b19b1a2f1d086d8

Download Submit