flawedammyy | 3e9debda74d9cfcc7f4a610405f77081bfda97a0c433c2813d2e21bd76a4ac86

Analysis

max time kernel
8s
max time network
123s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
31-12-2023 01:24

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General

Target

4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8.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

Processes:

4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8.exe

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies	4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5	4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5	4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE	4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8.exe

Modifies data under HKEY_USERS 9 IoCs

Processes:

4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8.exe

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE	4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin	4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr3 = 6b92a8e83c90d1093c4d2129e93de82bfebcaf29df56561895353885b0687c5bcbb6e3e8939a0927845638547cfd3cb995672833a2685ac1a4face996af66a0c62ae8e3e	4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin	4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Ammyy	4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr = 537d56736608796d5b5b4e1552532f9f5f1bc064b26b	4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8.exe

pid	Process
824	4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8.exe

Suspicious use of SendNotifyMessage 1 IoCs

Processes:

4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8.exe

pid	Process
824	4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8.exe

description	pid	Process	procid_target
PID 3708 wrote to memory of 824	3708	4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8.exe	22
PID 3708 wrote to memory of 824	3708	4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8.exe	22
PID 3708 wrote to memory of 824	3708	4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8.exe	22

C:\Users\Admin\AppData\Local\Temp\4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8.exe
"C:\Users\Admin\AppData\Local\Temp\4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8.exe"
1⤵
PID:2764

C:\Users\Admin\AppData\Local\Temp\4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8.exe
"C:\Users\Admin\AppData\Local\Temp\4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8.exe"
1⤵
- Drops file in System32 directory
- Modifies data under HKEY_USERS
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:824

C:\Users\Admin\AppData\Local\Temp\4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8.exe
"C:\Users\Admin\AppData\Local\Temp\4f648c95b8c832742b8b43f4e70689d0ef0328841744858c75d0a4e98fda5ff8.exe" -service -lunch
1⤵
- Suspicious use of WriteProcessMemory
PID:3708

Network

MITRE ATT&CK Matrix

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Downloads

C:\ProgramData\AMMYY\settings3.bin

MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

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