wannacry | 379cf4fce883e5853294990f94c082eb971db7b0e3a817f7abd4facffc4fe23f

Analysis

max time kernel
150s
max time network
155s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
26-08-2024 09:15

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General

Target

c2b3f51728001fbaaa5a73fcaf3e1a68_JaffaCakes118.dll
Size

5.0MB
MD5

c2b3f51728001fbaaa5a73fcaf3e1a68
SHA1

38b9d3880194558f17b9fa03b22d43b66691b82a
SHA256

379cf4fce883e5853294990f94c082eb971db7b0e3a817f7abd4facffc4fe23f
SHA512

7b1e75e2b86fe6aabd5713cb717ee85b1b0800a297a873ac70fcc179b683809bf5673ca6985f7771c234cb49a4f7c0d85031c834d5f9df9ccf27f460117c3638
SSDEEP

98304:d8qPoBhz1aRxcSUDk36SAEdhvxWa9P593R8yAVb:d8qPe1Cxcxk3ZAEUadzR8ycb

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3233) 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
3020	mssecsvc.exe
2760	mssecsvc.exe
3056	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	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.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 560 wrote to memory of 2716	560	rundll32.exe	29
PID 560 wrote to memory of 2716	560	rundll32.exe	29
PID 560 wrote to memory of 2716	560	rundll32.exe	29
PID 560 wrote to memory of 2716	560	rundll32.exe	29
PID 560 wrote to memory of 2716	560	rundll32.exe	29
PID 560 wrote to memory of 2716	560	rundll32.exe	29
PID 560 wrote to memory of 2716	560	rundll32.exe	29
PID 2716 wrote to memory of 3020	2716	rundll32.exe	30
PID 2716 wrote to memory of 3020	2716	rundll32.exe	30
PID 2716 wrote to memory of 3020	2716	rundll32.exe	30
PID 2716 wrote to memory of 3020	2716	rundll32.exe	30

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c2b3f51728001fbaaa5a73fcaf3e1a68_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:560
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c2b3f51728001fbaaa5a73fcaf3e1a68_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2716
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:3020
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:3056

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:2760

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
03baffc5d9239b588a88d52978448db6

SHA1
c9b9062f1fa1681481f0a787fbe1fe8b6b6d6486

SHA256
09d086a2f16d620a4c4fd823651fa652f22eb27bb563b682d9372afa69f7662c

SHA512
ae8eabb41df5a4d2cdf04929269e822e8d8911c5e891244d257e85b6013b6a8028938e3287132b2e1ec2edc8e2113f51f52ff2d4d77e54b83f9a730582abccf3

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
bc098c445c7a7bafbebb45d800754fba

SHA1
1d43eb2eda999ce9171b222b9a4934d660eb97c8

SHA256
7cb8c18228d47d6765dda8cf34b3b6acbdb91808fdf714b49d2eed8148354594

SHA512
7309b5d2daea8671a8670a73350bc4e35e6cf4cc1364210082428676615f509c4abb904baa60b4e2fdaf97998a14979232f6b439f2373505bc2f43d91f29c101

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