flawedammyy | 9eb5ff781349981303805f00b97afb2a4ef551ba2906a1544332642d71713cae

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
29-09-2024 02:13

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General

Target

AA_v3.exe
Size

755KB
MD5

11bc606269a161555431bacf37f7c1e4
SHA1

63c52b0ac68ab7464e2cd777442a5807db9b5383
SHA256

1831806fc27d496f0f9dcfd8402724189deaeb5f8bcf0118f3d6484d0bdee9ed
SHA512

0be867fce920d493d2a37f996627bceea87621ba4071ae4383dd4a24748eedf7dc5ca6db089217b82ec38870248c6840f785683bf359d1014c7109e7d46dd90f
SSDEEP

12288:XVFUEuNmwvGrw9i0aTGRGicBckyyFRtWY1i3FTsvOVV0gz:3UEUUw9RaTNicBrPFRtJ1iVTsC5z

Score

10^/10

flawedammyy discovery 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	AA_v3.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE	AA_v3.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies	AA_v3.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5	AA_v3.exe

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AA_v3.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AA_v3.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AA_v3.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.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	AA_v3.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin	AA_v3.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE	AA_v3.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Ammyy	AA_v3.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin	AA_v3.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	AA_v3.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr = 537d567366087c6658524c1752538909970c5d4db36b	AA_v3.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr3 = 559b791e332ed51fbc4fa3f0f5c4eb2b69b4c87d99a606eb0865d6fca1c742f79da2d70ac85f3b8754f57170f1827ad0b8276ec08f1c1e9d3c4efd1dc73492753f033770f431d840b72f4d	AA_v3.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2148	AA_v3.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2148	AA_v3.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4584 wrote to memory of 2148	4584	AA_v3.exe	83
PID 4584 wrote to memory of 2148	4584	AA_v3.exe	83
PID 4584 wrote to memory of 2148	4584	AA_v3.exe	83

C:\Users\Admin\AppData\Local\Temp\AA_v3.exe
"C:\Users\Admin\AppData\Local\Temp\AA_v3.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:232

C:\Users\Admin\AppData\Local\Temp\AA_v3.exe
"C:\Users\Admin\AppData\Local\Temp\AA_v3.exe" -service -lunch
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4584
- C:\Users\Admin\AppData\Local\Temp\AA_v3.exe
  "C:\Users\Admin\AppData\Local\Temp\AA_v3.exe"
  2⤵
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Modifies data under HKEY_USERS
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:2148

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\AMMYY\hr

Filesize
22B

MD5
172a19a29b92d08d82593a2c31cedf35

SHA1
2c02568bffb9c15d4050b783533099c56ab7403f

SHA256
877160dd2f787a48bfe5b888806160bcc9331cc18ac1fa821191d28ae4f2e529

SHA512
9f47d8308878cb33192aafa5b8af044760668b48ce26745ee95346b6ce128770d580ce4530bb5436b81489db524661fecbd7d41f876daaf26f55b6584b40676f

Download Submit
C:\ProgramData\AMMYY\hr3

Filesize
75B

MD5
cd9ecb47170bd426f2e11493b0fd870f

SHA1
966d75638e3ec7d6342b5e80da410cd06f7e8a45

SHA256
9edf6e3690717e2dca9a52a4115ed6f992a29c9c404e6a351515a4dce22691f6

SHA512
70e2cb86c6458f6bb0ec4936b89f7715ba50ac4cb4b9807fd6e4604d044727e7374a1a82bcbd780d7f98af92c0bcd36c522c27305b35813f19903f62746adde7

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

Filesize
271B

MD5
714f2508d4227f74b6adacfef73815d8

SHA1
a35c8a796e4453c0c09d011284b806d25bdad04c

SHA256
a5579945f23747541c0e80b79e79375d4ca44feafcd425ee9bd9302e35312480

SHA512
1171a6eac6d237053815a40c2bcc2df9f4209902d6157777377228f3b618cad50c88a9519444ed5c447cf744e4655272fb42dabb567df85b4b19b1a2f1d086d8

Download Submit