wannacry | 1ef876ab0e4b0885f1585753423999b8fce935c87b77f9274aa1debff01efe7c

Analysis

max time kernel
150s
max time network
154s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
14-09-2024 07:04

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General

Target

dfb508f82ab7809d3f0266d852009a99_JaffaCakes118.dll
Size

5.0MB
MD5

dfb508f82ab7809d3f0266d852009a99
SHA1

b3987ad6c7e7cc751a63c89a307b335b86e1d78b
SHA256

1ef876ab0e4b0885f1585753423999b8fce935c87b77f9274aa1debff01efe7c
SHA512

a67cc2fa77864a3b35345cd63760865bb0dc2a579e3dbd543a9904a0563f46815115116848e7ade48d6df094ed77787d2de182414937f396e3953e1b44b55dbe
SSDEEP

98304:d8qPoBhz1aRxcSUDk36SAEdhvxWa9P593R8yAVp2owc:d8qPe1Cxcxk3ZAEUadzR8yc4

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3240) 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
1468	mssecsvc.exe
764	mssecsvc.exe
2752	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 11 IoCs

description	pid	Process	procid_target
PID 2264 wrote to memory of 1292	2264	rundll32.exe	30
PID 2264 wrote to memory of 1292	2264	rundll32.exe	30
PID 2264 wrote to memory of 1292	2264	rundll32.exe	30
PID 2264 wrote to memory of 1292	2264	rundll32.exe	30
PID 2264 wrote to memory of 1292	2264	rundll32.exe	30
PID 2264 wrote to memory of 1292	2264	rundll32.exe	30
PID 2264 wrote to memory of 1292	2264	rundll32.exe	30
PID 1292 wrote to memory of 1468	1292	rundll32.exe	31
PID 1292 wrote to memory of 1468	1292	rundll32.exe	31
PID 1292 wrote to memory of 1468	1292	rundll32.exe	31
PID 1292 wrote to memory of 1468	1292	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\dfb508f82ab7809d3f0266d852009a99_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2264
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\dfb508f82ab7809d3f0266d852009a99_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1292
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:1468
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2752

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:764

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
679d91ad1673915f28d1ca5eb78b8486

SHA1
0cd89062a1ce2a61d65ab11e6b72de5115eacf48

SHA256
d9fc0a4089f5ca33d4d9b01a3bf26eae796b8647f6c95b0ed65db344096ccc9f

SHA512
4531d0c0a5d039c7092216f144f352ea0ca4ae0e4761f0c233bfcf537723296a41a4766ad2aa78096f717c2d7f70c6d9712477b999219d2cee219c3f29176c2a

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
34e1278bb4509b217a58a294a596f1bb

SHA1
7aaf59e4b55c4f7f2095f98a16f1f196f7ce489f

SHA256
548d1c00a50abc1fed1747c4008defea1e85486def98ba1d22849c09309c77da

SHA512
47d24811a166abbc627ebef64e5cb8a88aa58f9a192f6f8020163702d566fd78947753cb47229f2a1bb591bcd3d012269277318e04db33575c76c1f1d5d2682d

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