flawedammyy | a27e7ed5147c810b8b8d4a2f1cb106340db602f000a4f5e383b046af8a281f19

Analysis

max time kernel
150s
max time network
126s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
05-01-2024 07:21

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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 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

Processes:

AA_v3.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-452311807-3713411997-1028535425-1000\Control Panel\International\Geo\Nation AA_v3.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-452311807-3713411997-1028535425-1000\Control Panel\International\Geo\Nation	AA_v3.exe

Modifies data under HKEY_USERS 6 IoCs

Processes:

AA_v3.exe

description	ioc	process
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 = 537d56736608796e5f5e4c10595327058a49e160b26b	AA_v3.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin\hr3 = 33ab6c39a8bbb2bbf68a388daf1f17014cce6bc2c88be758cb4f36937d7e45b57922bcf0fb2474e45fbdc1fceb682cf49eaee26eca7038d306ced17f542b97b6e7eef0db	AA_v3.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	AA_v3.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

AA_v3.exe

pid process

2676 AA_v3.exe
Suspicious use of SendNotifyMessage 1 IoCs

Processes:

AA_v3.exe

pid process

2676 AA_v3.exe

pid	process
2676	AA_v3.exe

pid	process
2676	AA_v3.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

AA_v3.exe

description	pid	process	target process
PID 2160 wrote to memory of 2676	2160	AA_v3.exe	AA_v3.exe
PID 2160 wrote to memory of 2676	2160	AA_v3.exe	AA_v3.exe
PID 2160 wrote to memory of 2676	2160	AA_v3.exe	AA_v3.exe
PID 2160 wrote to memory of 2676	2160	AA_v3.exe	AA_v3.exe

C:\Users\Admin\AppData\Local\Temp\AA_v3.exe
"C:\Users\Admin\AppData\Local\Temp\AA_v3.exe"
1⤵
PID:2260

C:\Users\Admin\AppData\Local\Temp\AA_v3.exe
"C:\Users\Admin\AppData\Local\Temp\AA_v3.exe" -service -lunch
1⤵
- Suspicious use of WriteProcessMemory
PID:2160
- C:\Users\Admin\AppData\Local\Temp\AA_v3.exe
  "C:\Users\Admin\AppData\Local\Temp\AA_v3.exe"
  2⤵
  - Checks computer location settings
  - Modifies data under HKEY_USERS
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:2676

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\AMMYY\hr

Filesize
22B

MD5
982db87787aac5ad5071940e26ae5d2f

SHA1
b639fc8142fc12bfbf4087d7a119d9ed5a144af0

SHA256
033f7a5b90b8885f929a0d351dba4978dad07dc40c8f6db3d1d64e8284e45980

SHA512
a07110baf5769f86d740067b3ea1358ea88aa8335a09fb0385b88bfbe3cbca64820a8a40bd1caf3009ec45c5dff4e99a6c0e48783393d566825ab7806005804b

Download Submit
C:\ProgramData\AMMYY\hr3

Filesize
68B

MD5
583f403271c1b6899e9f6a640814ff8b

SHA1
da99cc9ff2a187c1fd44e749ba4ed4b84b4db4c1

SHA256
941da5286f015c4820df78d0b7b6e2cec28685dc0ca35e5577b8968308d064f6

SHA512
682b09b345765775d17cfac2aa60c0d7bd3e5557844b6b59980aed36c93ce205c5d8b9d6ffd83bd84d0d22cee6c1655d95952d5b5bae9ad34d8c73d9a05ca165

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

Filesize
271B

MD5
714f2508d4227f74b6adacfef73815d8

SHA1
a35c8a796e4453c0c09d011284b806d25bdad04c

SHA256
a5579945f23747541c0e80b79e79375d4ca44feafcd425ee9bd9302e35312480

SHA512
1171a6eac6d237053815a40c2bcc2df9f4209902d6157777377228f3b618cad50c88a9519444ed5c447cf744e4655272fb42dabb567df85b4b19b1a2f1d086d8

Download Submit