flawedammyy | 9b3992193d3661c3605576230693556cb76e202be8d084e5a0548b328ee7afef

Analysis

max time kernel
150s
max time network
133s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
06-10-2024 22:48

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General

Target

dll/UzakYardim.exe
Size

740KB
MD5

10a524d7ac94678ae286b065421647db
SHA1

b538e3f113817c8237419310ef47817d1d961fa9
SHA256

55daa062650d42e0feabc5ae1c3e4a7f68d4f8a3c69be375a0abc7bf3e1efad4
SHA512

928b0e712e604a5ba9580ff6ecadbdf77e2fda6847b11366ce929281ae8e5e3a633073ff07176989ddcb5f8387c6f7c061729af99b61a23a319ddeb7d63ace1b
SSDEEP

12288:pUYpJqMH2OwlaUPcWWw5XZV8f64RteVpN5ETMasTjmgvPi:ZpJJWOwlaUPcWWwRZb4Rt+N5WMasHDy

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

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5	UzakYardim.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE	UzakYardim.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies	UzakYardim.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5	UzakYardim.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	UzakYardim.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	UzakYardim.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	UzakYardim.exe

Modifies data under HKEY_USERS 9 IoCs

description	ioc	Process
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr3 = f0751c6ac30166933b70e2331dca6f88e1054ea714d910ec337b313f6b71607dff246ae4a8e39404e8003bd73a8a30a94b723fd5cdb06373daa787d408577aad0d23247d7ef06d50208747	UzakYardim.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE	UzakYardim.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Ammyy	UzakYardim.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin	UzakYardim.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin	UzakYardim.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr = 537d567366087c6658524c175253669bd3ca0947b36b	UzakYardim.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	UzakYardim.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	UzakYardim.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	UzakYardim.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1780	UzakYardim.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1780	UzakYardim.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1244 wrote to memory of 1780	1244	UzakYardim.exe	82
PID 1244 wrote to memory of 1780	1244	UzakYardim.exe	82
PID 1244 wrote to memory of 1780	1244	UzakYardim.exe	82

C:\Users\Admin\AppData\Local\Temp\dll\UzakYardim.exe
"C:\Users\Admin\AppData\Local\Temp\dll\UzakYardim.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:320

C:\Users\Admin\AppData\Local\Temp\dll\UzakYardim.exe
"C:\Users\Admin\AppData\Local\Temp\dll\UzakYardim.exe" -service -lunch
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1244
- C:\Users\Admin\AppData\Local\Temp\dll\UzakYardim.exe
  "C:\Users\Admin\AppData\Local\Temp\dll\UzakYardim.exe"
  2⤵
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Modifies data under HKEY_USERS
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:1780

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\AMMYY\hr

Filesize
22B

MD5
d76fe59823eae99e31e27c79eb74d79e

SHA1
bd781d6678d3d6eb0f94139838047d4731e4c098

SHA256
4a96c984467c28d44043d789f18a632f0266295fcbd29905d54b8171b70546a5

SHA512
be310cc3ea4f0bdbd50f9d9e0392d6fc4d4a14ac0953a2875ebd8631bbd3c95c2a3a4bdeb74d744ccd85363fabbbe48c0740895c26fea23b619c1a3d547f5d87

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C:\ProgramData\AMMYY\hr3

Filesize
75B

MD5
4462e072b0c54d06b8b70d684906bb93

SHA1
dbb3e929c7f98ae1e857b58add60f80c7db045d9

SHA256
9ce4af88a385fbc7ba9514cf559f24f94c0b87b9f9d0de0da66a8a30c733fbf2

SHA512
78101ae22b6157043ab5d0110db4f2fcd081c678f77f01022cf6e97cd35553e33c80e74167457f54a9e1708ae7e7b1e1267485ef2c1fc889c444ebc49ea8b901

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

Filesize
331B

MD5
c5b80443bc31f2f5c1d2e384c3b82961

SHA1
445a99fa06484d216276b9284eedf25483780216

SHA256
cc8225e7412000f34a92f118af842d585d575498f36fe772dedad9f88c1fe5ad

SHA512
eae9247b9a1abbf8822ce65dbfd2db9b59a57367c7885614b89b8608688753e0c71fc8c955eb1493ef4dd7ba952760ff3476e05d9c177fb40661765a9e408d97

Download Submit