wannacry | 337df37a59537558856e34d1ab68511664eb7d65d8bd077f713ce84e39142686

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
02-06-2024 08:16

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General

Target

8d6e6ea71ac6dd82566ea60042ee86ab_JaffaCakes118.dll
Size

5.0MB
MD5

8d6e6ea71ac6dd82566ea60042ee86ab
SHA1

836557cb89300f02bf9395022b16418ba9d7fe96
SHA256

337df37a59537558856e34d1ab68511664eb7d65d8bd077f713ce84e39142686
SHA512

d095460fe5083d17239715a69823e852f087dfbb221ca42ec9d7a664a6f3bf0d8a1ea3945b3982c236fce04075950ea22e81b5dac2f01982403f24d4b795ef8a
SSDEEP

49152:JnjQqMSPbcBVQej/1INRx+TSqTdX1HhrH5AMEcaEau3R8:d8qPoBhz1aRxcSUDT593R8

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3232) 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

1852 mssecsvc.exe
3056 mssecsvc.exe
2552 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
1852	mssecsvc.exe
3056	mssecsvc.exe
2552	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 1844 wrote to memory of 2156	1844	rundll32.exe	rundll32.exe
PID 1844 wrote to memory of 2156	1844	rundll32.exe	rundll32.exe
PID 1844 wrote to memory of 2156	1844	rundll32.exe	rundll32.exe
PID 1844 wrote to memory of 2156	1844	rundll32.exe	rundll32.exe
PID 1844 wrote to memory of 2156	1844	rundll32.exe	rundll32.exe
PID 1844 wrote to memory of 2156	1844	rundll32.exe	rundll32.exe
PID 1844 wrote to memory of 2156	1844	rundll32.exe	rundll32.exe
PID 2156 wrote to memory of 1852	2156	rundll32.exe	mssecsvc.exe
PID 2156 wrote to memory of 1852	2156	rundll32.exe	mssecsvc.exe
PID 2156 wrote to memory of 1852	2156	rundll32.exe	mssecsvc.exe
PID 2156 wrote to memory of 1852	2156	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8d6e6ea71ac6dd82566ea60042ee86ab_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1844

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8d6e6ea71ac6dd82566ea60042ee86ab_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2156

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1852

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2552

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:3056

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
5faa48ed0a9307142ef6483fdc19bb5b

SHA1
cfa17fe1c6e8a36b1768e8495eb4191ee20c4a3c

SHA256
a5ca9ce03acdb745f1339bb6ddd2d90af70eda7073b5d3e1281c2f17f3d10a69

SHA512
179c5a357dd1ff20d3fa204499c5bf5d6e608aed84d0497836a5e4fb2f21519e22bf4c8fceb9a738938671b0b8c4b5123ea0c6cd5a3157e06c9248313142a387

Download Submit
C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
1ae22c8a18204e7ef1a2c6b873d1eb2c

SHA1
bf5114fd81d315210b0e6bd36ad0710e2e2c8564

SHA256
bc692b3f6c04d7e67a67793bcf07400ab797af7b77c1c2cc53c5eb46be703a9e

SHA512
7fd5011be3f7c2ac1d7e347600d6eecc262f44f0e121bcabbee5c0b279b1cdbab7b509cb3592a8448d6de01187bf96f8df7c881bb31439e7ca4afd4758ab99f9

Download Submit