wannacry | 8b04901e2af43dc45cf1a8912849c51f340c308159644fbc31cb58c8478e3faa

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
26-05-2024 07:25

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General

Target

74bc261ad11bc9f1d57641998dc1fe69_JaffaCakes118.dll
Size

5.0MB
MD5

74bc261ad11bc9f1d57641998dc1fe69
SHA1

4ad5ed670cc99370808f3c211ef15b7672e6b4c9
SHA256

8b04901e2af43dc45cf1a8912849c51f340c308159644fbc31cb58c8478e3faa
SHA512

1ecb9b5883643eeabfe07c6f6d82324c14addb27ee625542340e7a34c7eebc7fe45eefe70319352992bff0455bf373ffad6d78592618651f3b7a78a8ea437127
SSDEEP

49152:SnAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvxJM0H9PAMEc:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P5

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

2552 mssecsvc.exe
4876 mssecsvc.exe
3024 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 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

pid	process
2552	mssecsvc.exe
4876	mssecsvc.exe
3024	tasksche.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 5 IoCs

Processes:

mssecsvc.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 2780 wrote to memory of 1132	2780	rundll32.exe	rundll32.exe
PID 2780 wrote to memory of 1132	2780	rundll32.exe	rundll32.exe
PID 2780 wrote to memory of 1132	2780	rundll32.exe	rundll32.exe
PID 1132 wrote to memory of 2552	1132	rundll32.exe	mssecsvc.exe
PID 1132 wrote to memory of 2552	1132	rundll32.exe	mssecsvc.exe
PID 1132 wrote to memory of 2552	1132	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\74bc261ad11bc9f1d57641998dc1fe69_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2780

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\74bc261ad11bc9f1d57641998dc1fe69_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1132

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2552

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:3024

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:4876

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
22a591ee2e6e2b72caf6f0bcee2dde20

SHA1
eb82d2f4555ba73f57216b6ee7bb754ec00a3c73

SHA256
de8953d2e3e0c7fe91e7cf3a83f60641600bb900703c6155ded2b8169b639068

SHA512
2ed29e25ce8a3614808d09bd19a3f6a3109f3c983d288430eb0ca60e3df2424872e647d90d4bcde44f36be8864c72d53ca57cfe91833ab1fecd7b76b30d5d87b

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
a089e2e733a58751cab58ba261acc543

SHA1
5dfeb7e02d81bf5eb545c8993e49d48853ab30a9

SHA256
06a24b8386dfff1fa844846aafd8d9c5fda5c5687a84a3b53ffaf62d995498e3

SHA512
c5d924b45790f4687fddaf5bbb44200fd10d4016cc482cc9abff00f3ef725d6155f95a7934c81178bb5dde82ce8af93a2540cedfda0d7b3d7d90dce242268cb7

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