flawedammyy | e682ea6f18a526c3f0d8e7b6f3673b05e8e211a29fe3274423756d4731289224

Analysis

max time kernel
150s
max time network
120s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
15-06-2023 11:39

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General

Target

AA39_55.exe
Size

776KB
MD5

e3a944626a6932d5625b4e956781d8c5
SHA1

21022d5300a201433e84b18f8e4f1c94fd0904fe
SHA256

e682ea6f18a526c3f0d8e7b6f3673b05e8e211a29fe3274423756d4731289224
SHA512

d9e43d846c74a3db8bf96aa554c6216119f89d296c85ab0396c5000944ed0e6cabcf8a6b437aa22feaac56584ad1fe167f98434b6551377b400dbda0f360659c
SSDEEP

12288:KWeiVSRZI3HAaMhYBSJEKH0OERt4PMsajW0pSEVJjgjX:lHIZI3AaiYBSGKpERtMMRy0pDcjX

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:

AA39_55.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000\Control Panel\International\Geo\Nation	AA39_55.exe

Modifies data under HKEY_USERS 6 IoCs

Processes:

AA39_55.exe

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin	AA39_55.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr3 = 4fe92555c3a89bd846ec5c00966bbe46c3fecdc9fe4a299b6ce4fc0440a4393625f89efd7f8ea7eeec5618550ccd3ec013830903c6d49ca6ee864dfdf469f5c1e9f8a2960e	AA39_55.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	AA39_55.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin	AA39_55.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE	AA39_55.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Ammyy	AA39_55.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

AA39_55.exe

pid	Process
1928	AA39_55.exe

Suspicious use of SendNotifyMessage 1 IoCs

Processes:

AA39_55.exe

pid	Process
1928	AA39_55.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

AA39_55.exe

description	pid	Process	procid_target
PID 1632 wrote to memory of 1928	1632	AA39_55.exe	28
PID 1632 wrote to memory of 1928	1632	AA39_55.exe	28
PID 1632 wrote to memory of 1928	1632	AA39_55.exe	28
PID 1632 wrote to memory of 1928	1632	AA39_55.exe	28

C:\Users\Admin\AppData\Local\Temp\AA39_55.exe
"C:\Users\Admin\AppData\Local\Temp\AA39_55.exe"
1⤵
PID:1976

C:\Users\Admin\AppData\Local\Temp\AA39_55.exe
"C:\Users\Admin\AppData\Local\Temp\AA39_55.exe" -service -lunch
1⤵
- Suspicious use of WriteProcessMemory
PID:1632
- C:\Users\Admin\AppData\Local\Temp\AA39_55.exe
  "C:\Users\Admin\AppData\Local\Temp\AA39_55.exe"
  2⤵
  - Checks computer location settings
  - Modifies data under HKEY_USERS
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:1928

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:\Users\Admin\AppData\Local\Temp\settings3.bin

Filesize
318B

MD5
8411a75a1e371db9594e9943e3c6c850

SHA1
575abe26802724d1436d6083ff17802bc66a793c

SHA256
1a621d89ef9377869faf8c6bf1af7e6a370d12054f21ecdeb9ba266815929d10

SHA512
b83f349899a9c4a99a50120d5d55a6d4ded9373db3dbf26a24abf4e80254a1119483ec00d0fb58b13ade78a868705b5f55cfc829ffc12082a54e7111c34c1fc3

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