flawedammyy | 85841700199bb0762518be8266169250ed6a0b4e48e6dfb4e47b8da5c78d12c8

Analysis

max time kernel
150s
max time network
142s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
07-09-2024 17:49

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General

Target

DATA/tv/aa_v3.exe
Size

726KB
MD5

d22d719495f23e38805bbea5df434abb
SHA1

3cfeeb974e65c0ba671d81459d2c6b694d5d4eaf
SHA256

b5f65158f6713aa2fb7dd0b09d5f6dd39ae3cd1212ad330da207244d522aee20
SHA512

d87670775d222b25b329377c8d26c2a4c88ce6b1aa1d6fc004b95ad93f377fd56fb03e709b4b61b26c4fcf06fe477e42afe9f9715884ea91699548b1e4d4a4c7
SSDEEP

12288:ozJUxbtiiTHRJuEkQO7EwC2ZwFRtAdRXRryd+sq1zsgp:o9oNTHRz/O7rT6FRteRXR2IsqXp

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Control Panel\International\Geo\Nation	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 6 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	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
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin\hr = 537d567366087c6658524c17525337dace7b065eb36b	aa_v3.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin\hr3 = 14bbd271480b88921c3997c883e890fbe473b0911ae5f92336cefeba74e58be2589d9bb1c7f7ee63d80bec0a35c844869b8b8a655f034eed142b436c464e236937c5ee357999e6bdf7a157	aa_v3.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2392	aa_v3.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2392	aa_v3.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2992 wrote to memory of 2392	2992	aa_v3.exe	32
PID 2992 wrote to memory of 2392	2992	aa_v3.exe	32
PID 2992 wrote to memory of 2392	2992	aa_v3.exe	32
PID 2992 wrote to memory of 2392	2992	aa_v3.exe	32

C:\Users\Admin\AppData\Local\Temp\DATA\tv\aa_v3.exe
"C:\Users\Admin\AppData\Local\Temp\DATA\tv\aa_v3.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:2444

C:\Users\Admin\AppData\Local\Temp\DATA\tv\aa_v3.exe
"C:\Users\Admin\AppData\Local\Temp\DATA\tv\aa_v3.exe" -service -lunch
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2992
- C:\Users\Admin\AppData\Local\Temp\DATA\tv\aa_v3.exe
  "C:\Users\Admin\AppData\Local\Temp\DATA\tv\aa_v3.exe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Modifies data under HKEY_USERS
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:2392

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\AMMYY\hr

Filesize
22B

MD5
933e29d75969ac0a77ed300582ee7661

SHA1
d751609311a253127518e815fcb834f7e2fa3ffe

SHA256
b2f9ba3156b4a61c4d4f678507c5625d13012a7babfd745a7fe1729250c8353d

SHA512
b8f2efa7c8868eb389740f6b463c792856815b8bc26055d77e3b0ddd21342b71005374e9aa8a52489c6a4009aaf4279c982ee5bb56c7a793bd15df9c85c5d3c5

Download Submit
C:\ProgramData\AMMYY\hr3

Filesize
75B

MD5
e1923a234173ddc1a93d462cf0fc6e1c

SHA1
6a442d823f5c9a5052e3ec7eb709490358129cbf

SHA256
f9de68a83b2d5666101e2a2ab580430401b382b66a2ccfcbad5926ad240a41b1

SHA512
18b332ebaa556c5fed798cd176f91ba782309823f90a7f0dbb48be71e93a8a61ed903d9d3f9b4dad2cde8ea5f55378f2e2e953de61497a5ca0e2c53afb7bd5fd

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

Filesize
271B

MD5
e4f7224ed356915816bebb715326d18a

SHA1
8b441bb4276212b9e774cba75fdbb723cb68af93

SHA256
74378574282fceda54a869e384dffdf9d7d202d5a1937d781fcc501d6115e93c

SHA512
5a7fc84ea39311ef5277aaf3fa0e207b6e095ec236ea877756da7849d38678b8e73a7bd5ea49ae51ae730adc2a56cd79dd0fc3be63bcbb58ae50f9f030140ba2

Download Submit