wannacry | e36a302df4ef5b070d30fc642a27fd699cd64e7fda2c00988c63ec86a62b2689

Analysis

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

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
20-09-2024 07:36

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General

Target

ed1e264339b2c94a1f7c84465d3bd8aa_JaffaCakes118.dll
Size

5.0MB
MD5

ed1e264339b2c94a1f7c84465d3bd8aa
SHA1

b6a4aeecf403ee4e05a89efdcd6bed7594f0c8d0
SHA256

e36a302df4ef5b070d30fc642a27fd699cd64e7fda2c00988c63ec86a62b2689
SHA512

64bb505c58a50434b4e66d2f262ca384bdbb2cb756e0222b9ae85c0c2fd5865cdae9fc0ebe269e5fcf5ebc72a0c7a5ea266983b110394e5106a3bb3678d14ada
SSDEEP

98304:TDqPoBhz1aRxcSUDk36SAEdhvxWa9kNuEyR8yAVp2H:TDqPe1Cxcxk3ZAEUaNR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3355) 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 3 IoCs

pid	Process
1236	mssecsvc.exe
4408	mssecsvc.exe
1984	tasksche.exe

Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\WINDOWS\mssecsvc.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvc.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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.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"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4848 wrote to memory of 3136	4848	rundll32.exe	82
PID 4848 wrote to memory of 3136	4848	rundll32.exe	82
PID 4848 wrote to memory of 3136	4848	rundll32.exe	82
PID 3136 wrote to memory of 1236	3136	rundll32.exe	83
PID 3136 wrote to memory of 1236	3136	rundll32.exe	83
PID 3136 wrote to memory of 1236	3136	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\ed1e264339b2c94a1f7c84465d3bd8aa_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4848
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\ed1e264339b2c94a1f7c84465d3bd8aa_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3136
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:1236
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:1984

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:4408

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

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Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
65a0867868c3d34ff0d48c4194bb1f8d

SHA1
43b1acb61dd74c922a01f79d3d47e2bd8e1dfff1

SHA256
1ee610e1684615094b2f8370f45f6de0965bb729c85c1bbce5ab07c6739d0163

SHA512
053419213fdd5b45724fbba41697a4d616df406b9c0fc925dcde341dae1add20c7680833d0eae6da0dfaff1e2a2ec71a8826bcbc335508cdbd180154d09f1a55

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
35e4514d02b240d9df6f113c0acecdbd

SHA1
e073fed6edb3cc001474e9f73cfacd3323c2454e

SHA256
6ca982265e9d3f7628662e1c3ae98d3e0acc55b42d1204f31a32f1994aef6bd8

SHA512
fe8c58435c72feb141ebde87f695ddb0dc540dc05c4d06e152d4b07c105c1f3d2443f0b84200e76e7ad48b5519f11622eb41c642f4f0f7c810b6fb09fb01cd6f

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