flawedammyy | 0a7e27421e535b074b4fc4a7abc742ff232149a120a928a011f5428ace1413df

Analysis

max time kernel
150s
max time network
148s
platform
windows7_x64
resource
win7-20230705-en
resource tags

arch:x64arch:x86image:win7-20230705-enlocale:en-usos:windows7-x64system
submitted
07-07-2023 09:46

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General

Target

Device/HarddiskVolume6/Downloads/AA_v3.5.exe
Size

746KB
MD5

2cbf5657ffd8858a9597f296a60270c2
SHA1

b130611c92788337c4f6bb9e9454ff06eb409166
SHA256

9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac
SHA512

06339a299c8c9ce55e9b96582e54e0bf9e04f894ceb47c07486adf8b0140c2a01fd0932207aca8112ee0b16ba8711fee9435e37339aafb94f167b5a736ee7d0b
SSDEEP

12288:6NgEvTkYGzXUMA7PTgM0YOg26y4RtcxcUwhqb3omaY80NP6gL:6XTszE7PTgM0YOgA4RtcbwhsSYFVL

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-511725148-388773979-2853099937-1000\Control Panel\International\Geo\Nation	AA_v3.5.exe

Modifies data under HKEY_USERS 7 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE	AA_v3.5.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Ammyy	AA_v3.5.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin	AA_v3.5.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr = 537d56736608796e5f5e4c105953876c36d0ffefb16b	AA_v3.5.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr3 = 6151aa9a1af9513a205a73b70fe44e0ffa6a5ad3fcd747db1fe14c2ce585cf78e47da779d954d7484372b77e35305d354916670c6f7ed4a52042c8524d2cda3010f556df	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

pid	Process
2352	AA_v3.5.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2352	AA_v3.5.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2180 wrote to memory of 2352	2180	AA_v3.5.exe	28
PID 2180 wrote to memory of 2352	2180	AA_v3.5.exe	28
PID 2180 wrote to memory of 2352	2180	AA_v3.5.exe	28
PID 2180 wrote to memory of 2352	2180	AA_v3.5.exe	28

C:\Users\Admin\AppData\Local\Temp\Device\HarddiskVolume6\Downloads\AA_v3.5.exe
"C:\Users\Admin\AppData\Local\Temp\Device\HarddiskVolume6\Downloads\AA_v3.5.exe"
1⤵
PID:2192

C:\Users\Admin\AppData\Local\Temp\Device\HarddiskVolume6\Downloads\AA_v3.5.exe
"C:\Users\Admin\AppData\Local\Temp\Device\HarddiskVolume6\Downloads\AA_v3.5.exe" -service -lunch
1⤵
- Suspicious use of WriteProcessMemory
PID:2180
- C:\Users\Admin\AppData\Local\Temp\Device\HarddiskVolume6\Downloads\AA_v3.5.exe
  "C:\Users\Admin\AppData\Local\Temp\Device\HarddiskVolume6\Downloads\AA_v3.5.exe"
  2⤵
  - Checks computer location settings
  - Modifies data under HKEY_USERS
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:2352

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
5e1e85b04f2cc014c239742f86926337

SHA1
91cc1af3e43c9b9b95f00bb88b9bfa7ecafa6e81

SHA256
31a3faf6d8baf2af33193003e467728d9136f5eb64250e2ef334ebcceae4342e

SHA512
a06dc431c222fe6a6b65cfa9ed326fab22fbcb81212103cd153ae11a5cbf5816f62fcc7c8ad4fdfd1ba5afcf6d595221807b7cb4c44e0b30c338c10142202d6d

Download Submit
C:\ProgramData\AMMYY\hr3

Filesize
68B

MD5
2acad251d8c802321c5f285a9604b2f9

SHA1
20b89173f7583c834f78247070b4122985a8efed

SHA256
c3f402ac6df9896861978cb5dca3a21e140a1dbd30d5444e10ab21def1952d83

SHA512
a8f8e7e4597312bd9f6b56468b5c2e438eed870344d0e7bfc0226849fe4c6d90f9820a6b5db51e61136ed2b2018ce52abe44bdadf4fe042edffa5b37a004877f

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

Filesize
271B

MD5
714f2508d4227f74b6adacfef73815d8

SHA1
a35c8a796e4453c0c09d011284b806d25bdad04c

SHA256
a5579945f23747541c0e80b79e79375d4ca44feafcd425ee9bd9302e35312480

SHA512
1171a6eac6d237053815a40c2bcc2df9f4209902d6157777377228f3b618cad50c88a9519444ed5c447cf744e4655272fb42dabb567df85b4b19b1a2f1d086d8

Download Submit