wannacry | 54b556f1e1d527b3da3276da03a23aa24ce4903465c20a8abe3682f1f1a4b554

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
01-06-2024 00:05

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General

Target

88cf794645baeff4a6d27baa67d81fd5_JaffaCakes118.dll
Size

5.0MB
MD5

88cf794645baeff4a6d27baa67d81fd5
SHA1

18f72c2a321dba6f5a81c67322f60b5db5715b27
SHA256

54b556f1e1d527b3da3276da03a23aa24ce4903465c20a8abe3682f1f1a4b554
SHA512

c91fa19254fa91ba22ee9ea289cba4c8323681cc660956032d8e86ffdca6c2f9a7b8c7c4a5edc5adb81c8890b7d9eb41fefced16af8f02e8bb952e64be4c92eb
SSDEEP

49152:znAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SADcwfpuv5p1otTyB:TDqPoBhz1aRxcSUDk36SAW5p1

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3326) 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

4888 mssecsvc.exe
4476 mssecsvc.exe
3940 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
4888	mssecsvc.exe
4476	mssecsvc.exe
3940	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\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
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

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 4856 wrote to memory of 4552	4856	rundll32.exe	rundll32.exe
PID 4856 wrote to memory of 4552	4856	rundll32.exe	rundll32.exe
PID 4856 wrote to memory of 4552	4856	rundll32.exe	rundll32.exe
PID 4552 wrote to memory of 4888	4552	rundll32.exe	mssecsvc.exe
PID 4552 wrote to memory of 4888	4552	rundll32.exe	mssecsvc.exe
PID 4552 wrote to memory of 4888	4552	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\88cf794645baeff4a6d27baa67d81fd5_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4856

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\88cf794645baeff4a6d27baa67d81fd5_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4552

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:4888

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:3940

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:4476

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 --no-appcompat-clear --field-trial-handle=4000,i,1999448010053300448,1112699187621658374,262144 --variations-seed-version --mojo-platform-channel-handle=3976 /prefetch:8
1⤵
PID:4516

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
dde0f8b0127eb76d4f3a27ff5b732c66

SHA1
246352a9436ad96da300469a3ab3bf661b918328

SHA256
4592d44c0104456e6d8a1ae3d1e64feff4c0948f032ad397551e1332922188aa

SHA512
e37d5a323e35a2305357812deda9418fdfeda3becb1b689272bcd36ec977554275e2d03058c68e6922af749646d289d089b074450d5db89a08f0c7ef15c3c7a7

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
11e8ffc1d71eebdc634471b7442f35a5

SHA1
b41aaa0841f68e50953d519217e0b9a273148b73

SHA256
a6b4981c0b286f70d4d1bb51e99c24e5eb2c153ddc85abe2546020d062259d31

SHA512
687d7e7d4ecdc2cdbab27abde2a6a590629edf6142c8f93ec65e6fccd5b5081ca8ae1204420589d9397487d105cba7ab5640b2c65dc4f4c9cfa9a6d588dde0a7

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