wannacry | 8bbab918a16a0d1f71a56893042b37d9bccba90e5b04c074ed8bd4fd755cc02f

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
28-04-2024 22:31

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General

Target

0636efc4ba52127196acae91afa113e2_JaffaCakes118.dll
Size

5.0MB
MD5

0636efc4ba52127196acae91afa113e2
SHA1

be34539aa752513108b5a4f5fbbacb91835e74f8
SHA256

8bbab918a16a0d1f71a56893042b37d9bccba90e5b04c074ed8bd4fd755cc02f
SHA512

da78c335edcc29715f8527f503f57cffd46b3417fa69eb55d16ccec369e0c8a8cff342c89afba06f96f4a542b2600070bad03211f728d3840c8eb84b4bd18f9a
SSDEEP

49152:snjQqMSPbcBV1+TSqTdX1HkQo6SAARdhnvxJM0H9PAMEcaEau3R8SSS:M8qPoBfcSUDk36SAEdhvxWa9P593R8w

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3200) 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

2092 mssecsvc.exe
1992 mssecsvc.exe
1124 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
2092	mssecsvc.exe
1992	mssecsvc.exe
1124	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:

mssecsvc.exerundll32.exe

description ioc process

File created C:\WINDOWS\tasksche.exe mssecsvc.exe
File created C:\WINDOWS\mssecsvc.exe rundll32.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\tasksche.exe	mssecsvc.exe
File created	C:\WINDOWS\mssecsvc.exe	rundll32.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 1072 wrote to memory of 1104	1072	rundll32.exe	rundll32.exe
PID 1072 wrote to memory of 1104	1072	rundll32.exe	rundll32.exe
PID 1072 wrote to memory of 1104	1072	rundll32.exe	rundll32.exe
PID 1072 wrote to memory of 1104	1072	rundll32.exe	rundll32.exe
PID 1072 wrote to memory of 1104	1072	rundll32.exe	rundll32.exe
PID 1072 wrote to memory of 1104	1072	rundll32.exe	rundll32.exe
PID 1072 wrote to memory of 1104	1072	rundll32.exe	rundll32.exe
PID 1104 wrote to memory of 2092	1104	rundll32.exe	mssecsvc.exe
PID 1104 wrote to memory of 2092	1104	rundll32.exe	mssecsvc.exe
PID 1104 wrote to memory of 2092	1104	rundll32.exe	mssecsvc.exe
PID 1104 wrote to memory of 2092	1104	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\0636efc4ba52127196acae91afa113e2_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1072

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\0636efc4ba52127196acae91afa113e2_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1104

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2092

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:1124

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:1992

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
286c1218a09064d7b7870e9922de0992

SHA1
c0a7f67b68f32f4490af76a709ebe5fb1d9b5da6

SHA256
14fd8c53e6ab15332f71b1612e9da102830e4ae38236ff41c12784dad899920b

SHA512
38f401791cd69f73aa9c919b711b47710c4ca24571669cbd9ba9cde9f4b488ce9d1d687a42f5985a4ec9292a588361f722a158961b1c60fe41bc8962eade78c2

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
d7db35f72ca7c45a1f8489e7e90489e0

SHA1
4353161d5043d8939dc4c76e85c0269809e03f98

SHA256
55ef2ac2ce8c6c00d91ab3ca78a1931338c13f86ab5c4a07a980002e59da2d5b

SHA512
cce907df648b9b88621b2945a769e3e36216157d4a015d9126b6bdb69e53faded6f41d774ff8a28e0b6cb3a6678446df83e79cdc1dbeeda360f76f980a23be56

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