wannacry | ac21c16db4a441304d1cfbfe0938fe936be0fa020e2b50b1583f3fb74e4210ff

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
26-05-2024 20:32

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General

Target

76bf799125bf9e674fe7a835051a8854_JaffaCakes118.dll
Size

5.0MB
MD5

76bf799125bf9e674fe7a835051a8854
SHA1

6d8b621d6c44ef6275067e68a7b20bfd06f73c74
SHA256

ac21c16db4a441304d1cfbfe0938fe936be0fa020e2b50b1583f3fb74e4210ff
SHA512

5f8207f12554a583980de757a36b4275b6dd7313a7152976e75badee5a4e320288effd81165d403a89e30b7814685fc8a6c05858deeb3ed4256236f119a5edb9
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhvxWa9Pyd:+DqPe1Cxcxk3ZAEUady

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3178) 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

3648 mssecsvc.exe
4044 mssecsvc.exe
2832 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
3648	mssecsvc.exe
4044	mssecsvc.exe
2832	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 216 wrote to memory of 4368	216	rundll32.exe	rundll32.exe
PID 216 wrote to memory of 4368	216	rundll32.exe	rundll32.exe
PID 216 wrote to memory of 4368	216	rundll32.exe	rundll32.exe
PID 4368 wrote to memory of 3648	4368	rundll32.exe	mssecsvc.exe
PID 4368 wrote to memory of 3648	4368	rundll32.exe	mssecsvc.exe
PID 4368 wrote to memory of 3648	4368	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\76bf799125bf9e674fe7a835051a8854_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:216

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\76bf799125bf9e674fe7a835051a8854_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4368

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:3648

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2832

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:4044

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\WINDOWS\mssecsvc.exe
Filesize
3.6MB

MD5
0b3f724a10ff9a534caab70ca0fea58f

SHA1
24baf1a554184043e4618ac3078df85886188b99

SHA256
009c3445235c4996b323047480d4a760b9f2f8512bc53f6c78be5a182ff5d13f

SHA512
5c82e5dfd2d80730d390f11382d5d50c4ce665e798710d790fbe757f8571a3ef1cc7d02e8a662784a38c2fec640ffabbbeb5801dacf0cb7a93005fcbfac05714

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
408e5a75158bfb6c261a52448b5be191

SHA1
e6981e6160d0b1597f5d340d07ec37b680231faf

SHA256
9541a1871a0621e1d1708e8ea24f1040e5f221bcae37b65e0863fc51c27176e5

SHA512
7b284eecd0ceec3c58b85dc5c70e0787a3979041a4734ddf575fa63d27dcadb95ccd2121bb2993fbc58e2319e05be5e4ecc9e1f1d7bbaa2f4d9dd4859f75348c

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