wannacry | 242743baf453444c89c5c31203de59b2d6af0a4fa9bd7e7de9b7b52c6414376e

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
25-09-2024 23:18

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General

Target

f70dc6617585a6cdb57999cfc7e35983_JaffaCakes118.dll
Size

5.0MB
MD5

f70dc6617585a6cdb57999cfc7e35983
SHA1

fc392f28ffbf4adee56869067d25d8a7d33f3d1d
SHA256

242743baf453444c89c5c31203de59b2d6af0a4fa9bd7e7de9b7b52c6414376e
SHA512

1b904c5fd57e9a8e9de4034f4b9f9200addf9222bb258802f8eb915dca4312d78a490446d27ff0b78dd12f95379b9b15d9138f2fbb124312410e8e9bcbba30df
SSDEEP

49152:JnjQqMSPbcBVQej/1INRx+TSqTdX1HkQo6S:d8qPoBhz1aRxcSUDk36S

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3003) 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
2824	mssecsvc.exe
2788	mssecsvc.exe
2304	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	rundll32.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 2240 wrote to memory of 1800	2240	rundll32.exe	29
PID 2240 wrote to memory of 1800	2240	rundll32.exe	29
PID 2240 wrote to memory of 1800	2240	rundll32.exe	29
PID 2240 wrote to memory of 1800	2240	rundll32.exe	29
PID 2240 wrote to memory of 1800	2240	rundll32.exe	29
PID 2240 wrote to memory of 1800	2240	rundll32.exe	29
PID 2240 wrote to memory of 1800	2240	rundll32.exe	29
PID 1800 wrote to memory of 2824	1800	rundll32.exe	30
PID 1800 wrote to memory of 2824	1800	rundll32.exe	30
PID 1800 wrote to memory of 2824	1800	rundll32.exe	30
PID 1800 wrote to memory of 2824	1800	rundll32.exe	30

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\f70dc6617585a6cdb57999cfc7e35983_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2240
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\f70dc6617585a6cdb57999cfc7e35983_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1800
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2824
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2304

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:2788

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
902499be1f74facf8df615deea83bd63

SHA1
5ee5d0c7bdbf779838b3228267228de3c45bec4d

SHA256
3c75131419934c7b16f9721abdef7a5cd57cd20cea4757be3724b36c84380cf2

SHA512
fef964c845505b1695aab6b7e983a962206e1e95d5ae30556cdf67fdffd8f5c01696672429859aff5612299a7f69803b531591427f507bec819e8442d134332f

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
db73e31441cfcb4e3df4f90abf93be58

SHA1
cec5b1d186ac29e9de354232e7ced75cfaa7dbcc

SHA256
ec7921ced5b4b6e1a2466938f5bbbcb37bdbe3e18231bfe474829619427a46a2

SHA512
9469b87f95b82afc2b17843cc120585dd4e915bb560fa69e40a54cb752392a339181bfa6923783c63e418ffcef6ed661ff7fc7689828a13732a540c788642861

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