wannacry | d0535ad814de0ff7c164c849978445568d67ecc93e9d56b92a972d2103925050

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
20-09-2024 11:30

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General

Target

ed7cd9ddd0c1e1cf38f59e9e664d080f_JaffaCakes118.dll
Size

5.0MB
MD5

ed7cd9ddd0c1e1cf38f59e9e664d080f
SHA1

6b09a1cb5f9f43bd961176c90ace84a3030aff04
SHA256

d0535ad814de0ff7c164c849978445568d67ecc93e9d56b92a972d2103925050
SHA512

5e86173fe6354ba764b2e2281074d3afd679fdc451de22a10b47a130945cfb22df3dece5c195016eb4f62240b093ba104b118bf40f52535fd5e84ec21ca67099
SSDEEP

49152:SnjQxMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARxEau3R8yAH1p:+8xPoBhz1aRxcSUDk36SAE43R8yAVp

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3280) 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
796	mssecsvc.exe
2968	mssecsvc.exe
1552	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 System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\counters.dat	mssecsvc.exe

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 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 828 wrote to memory of 2280	828	rundll32.exe	31
PID 828 wrote to memory of 2280	828	rundll32.exe	31
PID 828 wrote to memory of 2280	828	rundll32.exe	31
PID 828 wrote to memory of 2280	828	rundll32.exe	31
PID 828 wrote to memory of 2280	828	rundll32.exe	31
PID 828 wrote to memory of 2280	828	rundll32.exe	31
PID 828 wrote to memory of 2280	828	rundll32.exe	31
PID 2280 wrote to memory of 796	2280	rundll32.exe	32
PID 2280 wrote to memory of 796	2280	rundll32.exe	32
PID 2280 wrote to memory of 796	2280	rundll32.exe	32
PID 2280 wrote to memory of 796	2280	rundll32.exe	32
PID 796 wrote to memory of 1552	796	mssecsvc.exe	34
PID 796 wrote to memory of 1552	796	mssecsvc.exe	34
PID 796 wrote to memory of 1552	796	mssecsvc.exe	34
PID 796 wrote to memory of 1552	796	mssecsvc.exe	34

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\ed7cd9ddd0c1e1cf38f59e9e664d080f_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:828
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\ed7cd9ddd0c1e1cf38f59e9e664d080f_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2280
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:796
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:1552

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:2968

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
5dbf1c7a182f3a1467d7a64bbfe3f72d

SHA1
ce587e332b205c39936c60671c32490270a7a829

SHA256
786ac51de4a52f74c69e239b2a65caf8036da31e6e785cf4c11519de1d978894

SHA512
e3ac0a9d0a667d5571358e2014c6a9b3db5c0c276d5cf8e7fcb849b146416b019487541147c0d33b9c4a6b495163e06347fbf920e0c0ee2c094235e873b145fa

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
c18443dcca8165ec96d671495ae9675e

SHA1
dfbf4ee502933dc96aef9d29dc3c2e35f053921f

SHA256
9e89a638ce8d9c47eed2df8aa7540a7a20e176302be41735a3985306758f0653

SHA512
240a8bbc3da3d4324a8d9cebe58bd2a76809470bb49e8297a704bef406d3f441c59df2b39eacb6a4a1401679ae1460dbe6c8313758524753ad4d51c41e587833

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