wannacry | d3d6fe7d340bfb8fdaa8be94c959099d860ea3c745ce3a15ac5c21078accc41e

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
04-05-2024 08:25

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General

Target

11e240d70f2e38cecfba1799d8046678_JaffaCakes118.dll
Size

5.0MB
MD5

11e240d70f2e38cecfba1799d8046678
SHA1

33b54e5eebec3eab8fa7159015984306fd53c8cb
SHA256

d3d6fe7d340bfb8fdaa8be94c959099d860ea3c745ce3a15ac5c21078accc41e
SHA512

7b83a0570ee1ec3b11cd1d0bc4ffe14ccf8657fb3a37871be47307a69214cfdbf4920ba05b2cce1d7819609160e177a3db3662f8b3a7b8a3ac04350bcd3d0a32
SSDEEP

98304:d8qPoBhz1aRxcSUDkydhvxWa9P593R8yAVp2H:d8qPe1CxcxkyUadzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3113) 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

Processes:

mssecsvc.exemssecsvc.exetasksche.exe

pid process

2544 mssecsvc.exe
1748 mssecsvc.exe
3032 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

pid	process
2544	mssecsvc.exe
1748	mssecsvc.exe
3032	tasksche.exe

Drops file in System32 directory 1 IoCs

Processes:

mssecsvc.exe

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

Processes:

rundll32.exemssecsvc.exe

description ioc process

File created C:\WINDOWS\mssecsvc.exe rundll32.exe
File created C:\WINDOWS\tasksche.exe mssecsvc.exe
Modifies data under HKEY_USERS 1 IoCs

Processes:

mssecsvc.exe

description ioc process

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

description	ioc	process
File created	C:\WINDOWS\mssecsvc.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvc.exe

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

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 2188 wrote to memory of 2392	2188	rundll32.exe	rundll32.exe
PID 2188 wrote to memory of 2392	2188	rundll32.exe	rundll32.exe
PID 2188 wrote to memory of 2392	2188	rundll32.exe	rundll32.exe
PID 2188 wrote to memory of 2392	2188	rundll32.exe	rundll32.exe
PID 2188 wrote to memory of 2392	2188	rundll32.exe	rundll32.exe
PID 2188 wrote to memory of 2392	2188	rundll32.exe	rundll32.exe
PID 2188 wrote to memory of 2392	2188	rundll32.exe	rundll32.exe
PID 2392 wrote to memory of 2544	2392	rundll32.exe	mssecsvc.exe
PID 2392 wrote to memory of 2544	2392	rundll32.exe	mssecsvc.exe
PID 2392 wrote to memory of 2544	2392	rundll32.exe	mssecsvc.exe
PID 2392 wrote to memory of 2544	2392	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\11e240d70f2e38cecfba1799d8046678_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2188

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\11e240d70f2e38cecfba1799d8046678_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2392

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2544

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:3032

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:1748

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\mssecsvc.exe
Filesize
3.6MB

MD5
6edc22d530ba8a8c3de87400d1a3c762

SHA1
83975a8e5718eb954ccba19f497a16c75c361cea

SHA256
ed59f9f12b99554ead96ba5351f9413654526e6d67c54594fa051d61bd53cd12

SHA512
ce8eb2fb1d557101a9c16a6b52eedc18ffb30d34cef10f5e2c3cd5d740ac4a9e794f4446efedfff9f22a9cd1a715d0f7457f7284554c8d61d350aaa530d9ef4f

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
407207ed2f91fcc504c3c872020debba

SHA1
7d493a63fe1ab5ac8102a2c54130115b4f3ffa4b

SHA256
ab6d965875faa63059f57ae3772f92935bf360ae681a009cac240f05020d0617

SHA512
18be7d0ca0dc4f4f78bbc2e330802f624eae9ea3e47f23be9d1b6387631ae31d99155659a5256501e5ce68ad7ed5a6baa41115ddc00f77f7a906402779fd1d32

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