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
73s
max time network
74s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
21/01/2023, 00:40

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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\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
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5	sys09.exe

Modifies data under HKEY_USERS 9 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin	sys09.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Ammyy	sys09.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr = 537d56736608796d5b5b4e155253df162f697172b16b	sys09.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr3 = 96e8b74021a1a1441a2ad981401ed39195860f881786046db5fef8843a53af3c5c01c1646ba458d49e4edbf8b4ca599268e6e5cec3004e8492eef69fbcb9a6c17ef1b89e	sys09.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	sys09.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	sys09.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE	sys09.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin	sys09.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	sys09.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4208	sys09.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4208	sys09.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3312 wrote to memory of 4208	3312	sys09.exe	82
PID 3312 wrote to memory of 4208	3312	sys09.exe	82
PID 3312 wrote to memory of 4208	3312	sys09.exe	82

C:\Users\Admin\AppData\Local\Temp\sys09.exe
"C:\Users\Admin\AppData\Local\Temp\sys09.exe"
1⤵
PID:3092

C:\Users\Admin\AppData\Local\Temp\sys09.exe
"C:\Users\Admin\AppData\Local\Temp\sys09.exe" -service -lunch
1⤵
- Suspicious use of WriteProcessMemory
PID:3312
- 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:4208

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

C:\ProgramData\AMMYY\hr

Filesize
22B

MD5
4b5cbc9525bf3eeb29f8dc2a37b3fbea

SHA1
36171b62d4dbe59d64c2794f01a6c36af48ffe85

SHA256
6ec2e80d4db938dd6b3ed1bf672ee84c22d0d53a6f6f490775034356e5a4b4b4

SHA512
8cec0e2bcfd3575b7e37fefedd17398ff887d93f036fa9bad45f0e54ec143792e62709718544d1c742da09ad3cc12e308cebe90d4f989cca2f1e8e32f9724c87

Download Submit
C:\ProgramData\AMMYY\hr3

Filesize
68B

MD5
94dd7b2b649f44cadc9613c20d91c97b

SHA1
98d3bff5359485b3041579a9a9c6108d298d8898

SHA256
ce74e3da9590a20e7e86aca01d402015d3c119d08a78345bfafa1355579e2b02

SHA512
2145cc51b2c8be5bb877bdae650071df3b252076bc9262e51d3e1141319821169ddb7ff5df0b766755061bda8950bb2b5d67033360cc181232af82fcc709d927

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

Filesize
271B

MD5
714f2508d4227f74b6adacfef73815d8

SHA1
a35c8a796e4453c0c09d011284b806d25bdad04c

SHA256
a5579945f23747541c0e80b79e79375d4ca44feafcd425ee9bd9302e35312480

SHA512
1171a6eac6d237053815a40c2bcc2df9f4209902d6157777377228f3b618cad50c88a9519444ed5c447cf744e4655272fb42dabb567df85b4b19b1a2f1d086d8

Download Submit