flawedammyy | 43bba98a64dd96cf0571f3d6dceafdc549cc3767a1beab6fe4a6e1fd3ddd3153

Analysis

max time kernel
150s
max time network
143s
platform
windows7_x64
resource
win7-20230712-en
resource tags

arch:x64arch:x86image:win7-20230712-enlocale:en-usos:windows7-x64system
submitted
19-07-2023 11:34

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General

Target

AA_v3.5.exe
Size

751KB
MD5

5686a7032e37087f0fd082a04f727aad
SHA1

341fee5256dcc259a3a566ca8f0260eb1e60d730
SHA256

43bba98a64dd96cf0571f3d6dceafdc549cc3767a1beab6fe4a6e1fd3ddd3153
SHA512

0ebd95b20ef54d047fdaec37cfb10e2c39ea9d63fa28d6a6848ec11b34a4c4ec5f7a8a430d81670461203b9e675ac4a32cac3da4a1c471f16e8d003c6dea3345
SSDEEP

12288:oPO1fNZApVuCN7e/yalnM4RtjLDXcbOAS3snvVgbgJ:om1fN6pkCNa/yaq4RtjXcu3sSEJ

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_v3.5.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1024678951-1535676557-2778719785-1000\Control Panel\International\Geo\Nation	AA_v3.5.exe

Modifies data under HKEY_USERS 6 IoCs

Processes:

AA_v3.5.exe

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE	AA_v3.5.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy	AA_v3.5.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin\hr = 537d56736608796e5f5e4c105953e7da8c0b71e5b16b	AA_v3.5.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin\hr3 = 905e93ea1e886f7486e6f6f1e7af5759228c8426b7774a6174579ad02b7cbbaf34636489d6ff3ea2360e4b6dbc39cc4a08924063747a24032c2b01bd4795760ed82daf21	AA_v3.5.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	AA_v3.5.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin	AA_v3.5.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

AA_v3.5.exe

pid	Process
2420	AA_v3.5.exe

Suspicious use of SendNotifyMessage 1 IoCs

Processes:

AA_v3.5.exe

pid	Process
2420	AA_v3.5.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

AA_v3.5.exe

description	pid	Process	procid_target
PID 3068 wrote to memory of 2420	3068	AA_v3.5.exe	29
PID 3068 wrote to memory of 2420	3068	AA_v3.5.exe	29
PID 3068 wrote to memory of 2420	3068	AA_v3.5.exe	29
PID 3068 wrote to memory of 2420	3068	AA_v3.5.exe	29

C:\Users\Admin\AppData\Local\Temp\AA_v3.5.exe
"C:\Users\Admin\AppData\Local\Temp\AA_v3.5.exe"
1⤵
PID:2508

C:\Users\Admin\AppData\Local\Temp\AA_v3.5.exe
"C:\Users\Admin\AppData\Local\Temp\AA_v3.5.exe" -service -lunch
1⤵
- Suspicious use of WriteProcessMemory
PID:3068
- C:\Users\Admin\AppData\Local\Temp\AA_v3.5.exe
  "C:\Users\Admin\AppData\Local\Temp\AA_v3.5.exe"
  2⤵
  - Checks computer location settings
  - Modifies data under HKEY_USERS
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:2420

Network

MITRE ATT&CK Enterprise v6

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
e2d69555ad24ec3a110ff9ea70b319a2

SHA1
7e810d573e730578d7db8d57d9ab6f1cd364bd09

SHA256
fadf4ee2c25fca9f527b8e70714dc98537c8b4961578703698526b00cf6d0442

SHA512
fe562794cc527d49eaec7ffbb47b42d5592e14e7ae01c0d066ee252dc8636619663bd9e3ca926009a8b7eefc00f4db176b5f3d2a048a455a4b0ee2e5b2bc7610

Download Submit
C:\ProgramData\AMMYY\hr3

Filesize
68B

MD5
4cc111537f5f7e2d89df00a82485e529

SHA1
0559c26ccf609e5100dfa0f6c0417adb61e457ee

SHA256
ad52151f270551c8fe20c2cea4cd216a85b428693651dd1213c8e053d676b252

SHA512
c179d43e9ae8150276b5f1cd9d2b2e07bd53096be87d98a57be728f85bf39afe1131bd4297c79d5b376985a9667ac64af5431263da05aa9d34c7da001dae9945

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

Filesize
271B

MD5
714f2508d4227f74b6adacfef73815d8

SHA1
a35c8a796e4453c0c09d011284b806d25bdad04c

SHA256
a5579945f23747541c0e80b79e79375d4ca44feafcd425ee9bd9302e35312480

SHA512
1171a6eac6d237053815a40c2bcc2df9f4209902d6157777377228f3b618cad50c88a9519444ed5c447cf744e4655272fb42dabb567df85b4b19b1a2f1d086d8

Download Submit