wannacry | 51f5f8f16812c0d4d057b8a949963ce68cf096d823edfd2586b51d3225383f2f

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
30-04-2024 14:36

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General

Target

09f82731e3d4e5138450cdbb47878e27_JaffaCakes118.dll
Size

5.0MB
MD5

09f82731e3d4e5138450cdbb47878e27
SHA1

a45e7c212aa3ab4223f60a0bfd65dcb4bf0c5fc4
SHA256

51f5f8f16812c0d4d057b8a949963ce68cf096d823edfd2586b51d3225383f2f
SHA512

20c09e78a81a4144eca86deff9d6a753e582adf76fcbc42f8fcb8477ac90c3a926fdc6eade93ee37cb88daae5ff5e1ca04b0889c1bd4262c355491d81a0982cf
SSDEEP

49152:JnjQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvxJM0H9PAMEcaE:d8qPoBhz1aRxcSUDk36SAEdhvxWa9P5

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3155) 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

2628 mssecsvc.exe
3044 mssecsvc.exe
2152 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
2628	mssecsvc.exe
3044	mssecsvc.exe
2152	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 2060 wrote to memory of 2052	2060	rundll32.exe	rundll32.exe
PID 2060 wrote to memory of 2052	2060	rundll32.exe	rundll32.exe
PID 2060 wrote to memory of 2052	2060	rundll32.exe	rundll32.exe
PID 2060 wrote to memory of 2052	2060	rundll32.exe	rundll32.exe
PID 2060 wrote to memory of 2052	2060	rundll32.exe	rundll32.exe
PID 2060 wrote to memory of 2052	2060	rundll32.exe	rundll32.exe
PID 2060 wrote to memory of 2052	2060	rundll32.exe	rundll32.exe
PID 2052 wrote to memory of 2628	2052	rundll32.exe	mssecsvc.exe
PID 2052 wrote to memory of 2628	2052	rundll32.exe	mssecsvc.exe
PID 2052 wrote to memory of 2628	2052	rundll32.exe	mssecsvc.exe
PID 2052 wrote to memory of 2628	2052	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\09f82731e3d4e5138450cdbb47878e27_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2060

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\09f82731e3d4e5138450cdbb47878e27_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2052

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2628

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2152

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:3044

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
6a607c06ec2a386e4d3dcabce0c9daaa

SHA1
5268967b51b881c68d916cb8f739eedd99357a24

SHA256
d683c2ca4751bc38fd4c56f5e9820e2797739cbd331466c025e49d663163c984

SHA512
66a6ef6e8880d08238b3d67950850aa16aa62233e37e88f878237a5abb004af244a97b806e6b45f6e3784d53739e9657fcbba0d8e1ab5f068fbbb8e6f6171516

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
fb4174dd5afc6dcc7db2e3502bb5a9c8

SHA1
240889c13fca97cd4d3c689fae435649dc793b07

SHA256
d9f852bcb5fe00b7e8af5b673f5f24b67a5513a83ee4b6c308f26c28658fb8ac

SHA512
74b5a65d05b1f2e5031d766ba818e40b8610e47ac0001adb20275eeabc836572172c21322b971fa1d34c05b15cd6307e7956cef637f59d80f7c0207f30073148

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