flawedammyy | a8aac2ccbe416c9776fbac687a2d210376582c7e58b306d3a0fdb25573119d7d

Analysis

max time kernel
150s
max time network
134s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
23/03/2023, 09:04

Target

Device/HarddiskVolume3/Aammyy Admin/AA_v3.5.exe
Size

746KB
MD5

f8cd52b70a11a1fb3f29c6f89ff971ec
SHA1

6a0c46818a6a10c2c5a98a0cce65fbaf95caa344
SHA256

6f2258383b92bfaf425f49fc7a5901bfa97a334de49ce015cf65396125c13d20
SHA512

987b6b288a454b6198d4e7f94b7bba67cafe37f9654cd3cd72134a85958efd2125596ae48e66a8ee49ee3f4199dac7f136e1831f2bf4015f25d2980f0b866abe
SSDEEP

12288:PUYpJqMH2OwlaUPcWWw5XZV8f64RteVpN5ETMasTjcP6gX:zpJJWOwlaUPcWWwRZb4Rt+N5WMasHoX

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 (data)	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr = 537d56736608796d5b5b4e1552530577ead82602b16b	AA_v3.5.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr3 = a7febea14e5e48a09bc04aabee2d0478ad0625f37cbc48ddaa10c6631b63e21a75ea3825f370f6d9cbb71b0014c35305fd3799820e4093e4e68f5b47800914ab2eaa4755	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\Cookies\CachePrefix = "Cookie:"	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
Key created	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin	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
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin	AA_v3.5.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3744	AA_v3.5.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
3744	AA_v3.5.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2004 wrote to memory of 3744	2004	AA_v3.5.exe	87
PID 2004 wrote to memory of 3744	2004	AA_v3.5.exe	87
PID 2004 wrote to memory of 3744	2004	AA_v3.5.exe	87

C:\Users\Admin\AppData\Local\Temp\Device\HarddiskVolume3\Aammyy Admin\AA_v3.5.exe
"C:\Users\Admin\AppData\Local\Temp\Device\HarddiskVolume3\Aammyy Admin\AA_v3.5.exe"
1⤵
PID:4100

C:\Users\Admin\AppData\Local\Temp\Device\HarddiskVolume3\Aammyy Admin\AA_v3.5.exe
"C:\Users\Admin\AppData\Local\Temp\Device\HarddiskVolume3\Aammyy Admin\AA_v3.5.exe" -service -lunch
1⤵
- Suspicious use of WriteProcessMemory
PID:2004
- C:\Users\Admin\AppData\Local\Temp\Device\HarddiskVolume3\Aammyy Admin\AA_v3.5.exe
  "C:\Users\Admin\AppData\Local\Temp\Device\HarddiskVolume3\Aammyy Admin\AA_v3.5.exe"
  2⤵
  - Drops file in System32 directory
  - Modifies data under HKEY_USERS
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:3744

C:\ProgramData\AMMYY\hr

Filesize
22B

MD5
1a23fe6b5b80ded022adcb85e4278215

SHA1
58ed3c2a3b6018a8f670d1c18500e5a221dd89fa

SHA256
aea776430732b8498ce1bf96ae7685b44f8ac8acbf960ed8fbca8adb1b959f3f

SHA512
739f1d54c338b347b81aa98316b54d175a73f1918cab86f7337348b6f7f321ea1e3e25a746712d95a56dc8d3bcc7274aa162838032d0b67ba33fb4b02cd02f5e

Download Submit
C:\ProgramData\AMMYY\hr3

Filesize
68B

MD5
ca7e60141ce760515633a96be03f1c13

SHA1
79c78143ee8956e046f3177eda898fa6a5c22115

SHA256
0f21cb42a3333d9dc6c523f18786d1414e141caf3fad1ac78c8d27cbefe81ac2

SHA512
919913897f5111db412e00511ca4148e0644b23401afc0071457239b254666cfb19fb296e8c8694f2e8287ece8fc2f8e0af7158975cd12a1a91ca0238e989028

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

Filesize
271B

MD5
714f2508d4227f74b6adacfef73815d8

SHA1
a35c8a796e4453c0c09d011284b806d25bdad04c

SHA256
a5579945f23747541c0e80b79e79375d4ca44feafcd425ee9bd9302e35312480

SHA512
1171a6eac6d237053815a40c2bcc2df9f4209902d6157777377228f3b618cad50c88a9519444ed5c447cf744e4655272fb42dabb567df85b4b19b1a2f1d086d8

Download Submit