wannacry | fe1e65b62cd7d316362f47bf5edb24f97c791ebc391011e221df8b8ebef7016a

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
16-06-2024 10:57

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General

Target

b325f5b31f894f5c5292d7dafc95e563_JaffaCakes118.dll
Size

5.0MB
MD5

b325f5b31f894f5c5292d7dafc95e563
SHA1

817d98c51fb829f295b5524beddef41ae7bcbcbd
SHA256

fe1e65b62cd7d316362f47bf5edb24f97c791ebc391011e221df8b8ebef7016a
SHA512

4642b86eff510a8effba55fac1b4cefbb4d03afc2334169ab2c5563ccbb44444315d2429cc33608afe7523968456447278502b42dc731dad0347c432adfeb8b9
SSDEEP

49152:SnAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAAfSIfb:+DqPoBhz1aRxcSUDk36SAyB

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3323) 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

3048 mssecsvc.exe
1564 mssecsvc.exe
896 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
3048	mssecsvc.exe
1564	mssecsvc.exe
896	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
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
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

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 3192 wrote to memory of 3024	3192	rundll32.exe	rundll32.exe
PID 3192 wrote to memory of 3024	3192	rundll32.exe	rundll32.exe
PID 3192 wrote to memory of 3024	3192	rundll32.exe	rundll32.exe
PID 3024 wrote to memory of 3048	3024	rundll32.exe	mssecsvc.exe
PID 3024 wrote to memory of 3048	3024	rundll32.exe	mssecsvc.exe
PID 3024 wrote to memory of 3048	3024	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\b325f5b31f894f5c5292d7dafc95e563_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3192

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\b325f5b31f894f5c5292d7dafc95e563_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:3024

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:3048

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:896

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:1564

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=3808,i,11751898164297348119,13021661521765644467,262144 --variations-seed-version --mojo-platform-channel-handle=4180 /prefetch:8
1⤵
PID:4996

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

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Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
3f435c1a39383f0b66f2e8110f1dc3ff

SHA1
1aeb08f40456637ec3fbcd9cee4a277e863a5413

SHA256
b5b68c15e7a6d200bd921156aceecc1684c3fff9120a7d713b143702bba4cc8e

SHA512
4fbf2d6725628fb7f7e84cc7acb5d2a6310b65564e4754e3b949ceeab47eb8191b90d5cc8c1225ec024058b3d03c0dfdb0da2c043d3d99706e5af45fa2184018

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
bcc815a31a7e1b4f34ec7ab230c2745d

SHA1
65d27c18a0cdd28259837c9f43ba05e36f8fece3

SHA256
39eb70821089751e0923c8898fbaf075da44ca8a0af167ea4edc10442d3bf087

SHA512
d0cfa32214afce4b1c9a416f39ec426c4e62e541e27e1890adce5c99f9b8fb7d41eef363189b54f971140edf1ce4f70d60eac80f6a867c21f224ac5b65655f31

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