flawedammyy | a6f814b525fbedec982f569c29d67cb11fb232ae5951eba4ecb6f62a2eeefb9c

General

Target

a6f814b525fbedec982f569c29d67cb11fb232ae5951eba4ecb6f62a2eeefb9cN.exe
Size

720KB
MD5

6bc5c1e1e9b7647b14ee5ffd0f53abd0
SHA1

3c9d020fab99d225a5b269901e226cb3d3c18bb8
SHA256

a6f814b525fbedec982f569c29d67cb11fb232ae5951eba4ecb6f62a2eeefb9c
SHA512

6cd0464098b45b6444985e9902070b7dfc3f4228a7d6445ac1e3a949f2b4fa3f9b8045a1d165309406605fec55eb93e248797ef9a076959defdad532626e97de
SSDEEP

12288:PYdNctvsfu2LVBfKf057C9lRt3i5olGJsxhzVEg4:wdNikfu2hBfK8ilRty5olGJsxd4

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
Flawedammyy family
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-1-5-21-3551809350-4263495960-1443967649-1000\Control Panel\International\Geo\Nation	a6f814b525fbedec982f569c29d67cb11fb232ae5951eba4ecb6f62a2eeefb9cN.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	a6f814b525fbedec982f569c29d67cb11fb232ae5951eba4ecb6f62a2eeefb9cN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a6f814b525fbedec982f569c29d67cb11fb232ae5951eba4ecb6f62a2eeefb9cN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a6f814b525fbedec982f569c29d67cb11fb232ae5951eba4ecb6f62a2eeefb9cN.exe

Modifies data under HKEY_USERS 6 IoCs

description	ioc	Process
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin\hr3 = 05cc305e26cadd17c83478288d1409f5fff8cd32dae94c5d82d820ff7bf1a2b1c1b5278dacb4adfe5178a858fd8baddfff546159705854104bcad75c003a231f4cc8c732	a6f814b525fbedec982f569c29d67cb11fb232ae5951eba4ecb6f62a2eeefb9cN.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	a6f814b525fbedec982f569c29d67cb11fb232ae5951eba4ecb6f62a2eeefb9cN.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin	a6f814b525fbedec982f569c29d67cb11fb232ae5951eba4ecb6f62a2eeefb9cN.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE	a6f814b525fbedec982f569c29d67cb11fb232ae5951eba4ecb6f62a2eeefb9cN.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy	a6f814b525fbedec982f569c29d67cb11fb232ae5951eba4ecb6f62a2eeefb9cN.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin\hr = 537d567366087c695f594c16545347349b49fe3eb36b	a6f814b525fbedec982f569c29d67cb11fb232ae5951eba4ecb6f62a2eeefb9cN.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2364	a6f814b525fbedec982f569c29d67cb11fb232ae5951eba4ecb6f62a2eeefb9cN.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2364	a6f814b525fbedec982f569c29d67cb11fb232ae5951eba4ecb6f62a2eeefb9cN.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3052 wrote to memory of 2364	3052	a6f814b525fbedec982f569c29d67cb11fb232ae5951eba4ecb6f62a2eeefb9cN.exe	31
PID 3052 wrote to memory of 2364	3052	a6f814b525fbedec982f569c29d67cb11fb232ae5951eba4ecb6f62a2eeefb9cN.exe	31
PID 3052 wrote to memory of 2364	3052	a6f814b525fbedec982f569c29d67cb11fb232ae5951eba4ecb6f62a2eeefb9cN.exe	31
PID 3052 wrote to memory of 2364	3052	a6f814b525fbedec982f569c29d67cb11fb232ae5951eba4ecb6f62a2eeefb9cN.exe	31

C:\Users\Admin\AppData\Local\Temp\a6f814b525fbedec982f569c29d67cb11fb232ae5951eba4ecb6f62a2eeefb9cN.exe
"C:\Users\Admin\AppData\Local\Temp\a6f814b525fbedec982f569c29d67cb11fb232ae5951eba4ecb6f62a2eeefb9cN.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:2992

C:\Users\Admin\AppData\Local\Temp\a6f814b525fbedec982f569c29d67cb11fb232ae5951eba4ecb6f62a2eeefb9cN.exe
"C:\Users\Admin\AppData\Local\Temp\a6f814b525fbedec982f569c29d67cb11fb232ae5951eba4ecb6f62a2eeefb9cN.exe" -service -lunch
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3052
- C:\Users\Admin\AppData\Local\Temp\a6f814b525fbedec982f569c29d67cb11fb232ae5951eba4ecb6f62a2eeefb9cN.exe
  "C:\Users\Admin\AppData\Local\Temp\a6f814b525fbedec982f569c29d67cb11fb232ae5951eba4ecb6f62a2eeefb9cN.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:2364

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\AMMYY\hr

Filesize
22B

MD5
2db1d0256d3ef3b6a1ee38cdf19d0338

SHA1
40d77c3ccaec9f5d70f9b25ab24f8e169257fbc4

SHA256
3af09088817c43764759dc7d9c39fc86680f39c42ed24ee872fcebac320eb074

SHA512
11f7db07810bb9ef98f1f26a8f646a1346ba1acc314dfda671dc09ecc60dcd0e8eed1191ca855bf9acc3b805b5dcf0958940e19ac81d13ab93d29f51a6907799

Download Submit
C:\ProgramData\AMMYY\hr3

Filesize
68B

MD5
ef53767655be05cdc243c5c546e6fa11

SHA1
2245eb4a8feed2b4f2a0970537e2193675b23e8d

SHA256
01a96af0d34630ba73fac22453b65bc2e8bc75b864667ada392aaff35ada075e

SHA512
f3124e08c050a213eda741dd4573accdd0cf2dccd71600f206dac21a8a6ba63d8c3ea9cf17803b9c0f6341fd0e003c53e1fd57c9d1180b7e5e04e77d8d3beb8e

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

Filesize
307B

MD5
6d41ae530d5f0c5531a343fb58a856ba

SHA1
c15b36f055c1cb7b5f743c7123e6a79ebfbb1eb1

SHA256
301fc095cca3f5f1f2449f39871b548cca14f795a556e8c63d319b91df90221f

SHA512
d2b32bdbbe3371db7bcd45d7e0ced6388bab6af5cc065e927de362ed2828c4aa82d1af28c4fedcbdf8b82beedfe0b8666b9bdec970cefe2a7133b0b7797adfda

Download Submit

Analysis

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