wannacry | 3e4aafbcc287cdeb6ea6ea32c319c1b6bda0631793f988d1ace8e0dfc55d26b3

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
19-09-2024 02:33

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General

Target

ea6cdc1ada92e18c9411d2bfacfe8a00_JaffaCakes118.dll
Size

5.0MB
MD5

ea6cdc1ada92e18c9411d2bfacfe8a00
SHA1

676cb33b89c949c733dac1990f881280aea28fbb
SHA256

3e4aafbcc287cdeb6ea6ea32c319c1b6bda0631793f988d1ace8e0dfc55d26b3
SHA512

21eb54de75f2d39b2556e7862e5f0d8e8f1962a69283ed51ba8a6fcc66cf8552c8ff563344cef188170471a214c7cb9c0cca02dd74ff2aef7b191af5e6fb9aee
SSDEEP

98304:d8qPoBhz1aRxcSUDk36SAEdhvxWa9P593:d8qPe1Cxcxk3ZAEUadz

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3284) 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
2928	mssecsvc.exe
2204	mssecsvc.exe
1524	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 2128 wrote to memory of 2436	2128	rundll32.exe	29
PID 2128 wrote to memory of 2436	2128	rundll32.exe	29
PID 2128 wrote to memory of 2436	2128	rundll32.exe	29
PID 2128 wrote to memory of 2436	2128	rundll32.exe	29
PID 2128 wrote to memory of 2436	2128	rundll32.exe	29
PID 2128 wrote to memory of 2436	2128	rundll32.exe	29
PID 2128 wrote to memory of 2436	2128	rundll32.exe	29
PID 2436 wrote to memory of 2928	2436	rundll32.exe	30
PID 2436 wrote to memory of 2928	2436	rundll32.exe	30
PID 2436 wrote to memory of 2928	2436	rundll32.exe	30
PID 2436 wrote to memory of 2928	2436	rundll32.exe	30

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\ea6cdc1ada92e18c9411d2bfacfe8a00_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2128
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\ea6cdc1ada92e18c9411d2bfacfe8a00_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2436
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2928
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:1524

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:2204

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
879ad7deb8ec3470d8edf510ff1f1060

SHA1
5a1b434507c9b1839946dd42977a7f68684c9838

SHA256
c64316d1e7d1c994435417c4c95c3c3aa872eaac81d9965f8ed6199927da0b71

SHA512
228b13df546bd5a8a8b3c49bac4f6a6ca44ef52fba07007bbf8a793cddc4bafd8705194836241fb2e8536246a74b821edf6cf70c72ff1865c7fdefb589f1f0a5

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
552b26ef2544c9dc3b940f9c9d41ceff

SHA1
bdefaab184e46678ef5b8ba5836e923044f54165

SHA256
6956ca197be27d22a6693cc9a222c7f397a9ba2855d242b7f94bda278d8d00fe

SHA512
78cfcdb708be96d82fd31e04808185b8d59d4dcbd42443bc286ee2710ba62becf0d846385dc1d9cadbcdcd407791bd60b827554cccfe9e41ba02fd6d92082273

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