wannacry | 10dd546c48ddfe24bf50fa7438f8b4a2e66e6f8045a4ee41b7948855c61a846b

Resubmissions

12-08-2024 14:55

240812-sayxrawdkr 10

12-08-2024 06:18

240812-g2nejsyejj 10

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
12-08-2024 06:18

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General

Target

8da3345636b0f9b8c0acc811f5a26c61_JaffaCakes118.dll
Size

5.0MB
MD5

8da3345636b0f9b8c0acc811f5a26c61
SHA1

ba21e0b470f9c7f2730f49e93bbb354fbae09aa8
SHA256

10dd546c48ddfe24bf50fa7438f8b4a2e66e6f8045a4ee41b7948855c61a846b
SHA512

ccbc07235c3776f4261385791e8f7a9e66aacb62ed80bf511c4aee883a24c9e57dfed2dce91f4fa3cfc5fbdbecba1b51b445ec40103d2f676c493134c607f550
SSDEEP

24576:RbLguriBJMSirYbcMNgef0QeQjG/D8kIqRYoAdNLKz6626M+vbOSSqTPVXmi:RnGMSPbcBVQej/1INRx+TSqTdX1

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (2036) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046

Executes dropped EXE 2 IoCs

pid	Process
1948	mssecsvr.exe
2380	mssecsvr.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\WINDOWS\mssecsvr.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvr.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	mssecsvr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	mssecsvr.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4388 wrote to memory of 2724	4388	rundll32.exe	86
PID 4388 wrote to memory of 2724	4388	rundll32.exe	86
PID 4388 wrote to memory of 2724	4388	rundll32.exe	86
PID 2724 wrote to memory of 1948	2724	rundll32.exe	88
PID 2724 wrote to memory of 1948	2724	rundll32.exe	88
PID 2724 wrote to memory of 1948	2724	rundll32.exe	88

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8da3345636b0f9b8c0acc811f5a26c61_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4388
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\8da3345636b0f9b8c0acc811f5a26c61_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2724
- - C:\WINDOWS\mssecsvr.exe
    C:\WINDOWS\mssecsvr.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:1948

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe -m security
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:2380

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
d4c4720c089d536af3e08ebd93d87a6f

SHA1
a73e5085cfc94451f4842e4ddb816fc7dbf1b760

SHA256
f86390b107563635cb3880f372d5a06186c93d7e1fa4297898e5d44cf166e8a1

SHA512
4259b9174c98f31af3c947851d46951e51f4fb48287a7b2a64f38a4641f767a2992fec8bbdd48556ab1dddcc8d516da2b2ce9622fdd355edb023d2b130db096a

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