flawedammyy | 32818a2dc7457ccc4f37444ccefc1cf1435657480c152b0ebb1c50833ed56eee

Resubmissions

24/03/2023, 20:48

230324-zlhhgabd8x 10

24/03/2023, 20:47

230324-zkt5wahc59 10

23/01/2023, 22:26

230123-2crqwsfg87 10

21/01/2023, 00:40

230121-a1a99sca71 10

Analysis

max time kernel
316s
max time network
280s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
24/03/2023, 20:47

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General

Target

sys09.exe
Size

751KB
MD5

4d853025b8cd8c725bf78e3df6cce967
SHA1

c6bff7857fdf33cbd8f052ef5d669675e5cf06f8
SHA256

4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8
SHA512

977e43eaa763cc66114e00a615818c66a84a5a47bac1cdf21eff9f8f1dcebf138d8ede823265a2f30807d648c57bf036818254964358691d3f9a013f930705cf
SSDEEP

12288:Tc0dZib4t9uOroAgUHvCUt4RtlTc+YNKpQsNvVd1gF:Tc/UtwOrZgUHv54Rt6+YNkQsNmF

Score

10^/10

flawedammyy trojan

Malware Config

Signatures

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\History\History.IE5	sys09.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5	sys09.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE	sys09.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies	sys09.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\History\CachePrefix = "Visited:"	sys09.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin	sys09.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE	sys09.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Ammyy	sys09.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin	sys09.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr = 537d56736608796d5b5b4e1552532a5a3504d201b16b	sys09.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	sys09.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	sys09.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr3 = 58fba6b9d0f3893cc194c916e1d8318e421d568348f36aca1aacde0e22945b371ec1dfa7a1d6afba9a9040d6623eaba642c38e5d3a69db68f7640c6b5feb6f17a72e0795	sys09.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2024	sys09.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2024	sys09.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3144 wrote to memory of 2024	3144	sys09.exe	87
PID 3144 wrote to memory of 2024	3144	sys09.exe	87
PID 3144 wrote to memory of 2024	3144	sys09.exe	87

C:\Users\Admin\AppData\Local\Temp\sys09.exe
"C:\Users\Admin\AppData\Local\Temp\sys09.exe"
1⤵
PID:1804

C:\Users\Admin\AppData\Local\Temp\sys09.exe
"C:\Users\Admin\AppData\Local\Temp\sys09.exe" -service -lunch
1⤵
- Suspicious use of WriteProcessMemory
PID:3144
- C:\Users\Admin\AppData\Local\Temp\sys09.exe
  "C:\Users\Admin\AppData\Local\Temp\sys09.exe"
  2⤵
  - Drops file in System32 directory
  - Modifies data under HKEY_USERS
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:2024

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

C:\ProgramData\AMMYY\hr

Filesize
22B

MD5
1a7c081ef17232e2269640a468141760

SHA1
664bb467531f74c0940a8b93466a5d6a2eacb449

SHA256
08d187cc33477679dceeee02167008bc1398005733888b0b392e16e1e10c06ee

SHA512
39032a19ff304568be42743762929ab1cc909c385f77f45efb22cfadd11aa28a3a406bcf77f2e703e67999ba0f3cc4b73c20feedbf7a6bf53436dee950d45e8e

Download Submit
C:\ProgramData\AMMYY\hr3

Filesize
68B

MD5
928beae9a4c45437a73b2b193f927891

SHA1
2a20797da6c62779217d85cdd585003ddeb936d7

SHA256
eeca232bdc46da273f68c923bfbf75cc828757901e59ce254cb186b0520d2348

SHA512
ef26cc91fd852ad4428db9da1217636be22cc4a1c3bac5007098457be7623f8871d0e9632e99adcdb14ed52fe6688badf5b442e293b82a9049ef6e78e55a446a

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

Filesize
271B

MD5
714f2508d4227f74b6adacfef73815d8

SHA1
a35c8a796e4453c0c09d011284b806d25bdad04c

SHA256
a5579945f23747541c0e80b79e79375d4ca44feafcd425ee9bd9302e35312480

SHA512
1171a6eac6d237053815a40c2bcc2df9f4209902d6157777377228f3b618cad50c88a9519444ed5c447cf744e4655272fb42dabb567df85b4b19b1a2f1d086d8

Download Submit