wannacry | db7b9ab44954778378c42dbbdf8ff84e6627458c40863fc39cbe14958835e2df

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
30-05-2024 21:55

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General

Target

8507fffa888cdcb70e61afcf8f9ce971_JaffaCakes118.dll
Size

5.0MB
MD5

8507fffa888cdcb70e61afcf8f9ce971
SHA1

665c2d7f8585f9140e3569f8386419e3624b3046
SHA256

db7b9ab44954778378c42dbbdf8ff84e6627458c40863fc39cbe14958835e2df
SHA512

8bef5fc47c4dbeaa5813f49ea6db0d76850144a9a015b62bfc179045077f9f2de881e8271cc84626032a2661fba7231673a6856769a87366b1cf64300602e389
SSDEEP

49152:SnAQqMSPbcBVQejdvxJM0H9PAMEcaEau3R8yAH1plAH:+DqPoBhhxWa9P593R8yAVp2H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3177) 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

1284 mssecsvc.exe
2900 mssecsvc.exe
2572 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
1284	mssecsvc.exe
2900	mssecsvc.exe
2572	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\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
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1316 wrote to memory of 1636	1316	rundll32.exe	rundll32.exe
PID 1316 wrote to memory of 1636	1316	rundll32.exe	rundll32.exe
PID 1316 wrote to memory of 1636	1316	rundll32.exe	rundll32.exe
PID 1636 wrote to memory of 1284	1636	rundll32.exe	mssecsvc.exe
PID 1636 wrote to memory of 1284	1636	rundll32.exe	mssecsvc.exe
PID 1636 wrote to memory of 1284	1636	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8507fffa888cdcb70e61afcf8f9ce971_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1316

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8507fffa888cdcb70e61afcf8f9ce971_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1636

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1284

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2572

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:2900

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
32e8eb23c3fe843ac2c05fd099ac7f74

SHA1
9b8ff1cbecb0cdd7eb287773af6f7725d3d21071

SHA256
df40202bbdd1b9410a9384f970701a5dc56fc8cfeaac044dcc36a22a11296131

SHA512
9fe1395c3ceedfde3ff36faf05334b9dd8c6f971082d1fb932749b463dd219b67bd745db730d1aa9807d79ab19d6e60e55d31e107e0deb092924d400751fbef0

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
9b31ee469a893a9a34d84630933b4901

SHA1
d17c205f42eb046db63bc542fd1d8e425c44a488

SHA256
31fe6348ae19871d4a757e214cf6563adb5b90e094b97ff7ea0d747271ea6aa9

SHA512
55cb7a752c4f7785f394bcd5a80aecd86127a1ef8cc9fff5abe20c933ec91ae481e016fb0f5ecebe7ac50dfcb4a27417ddf21e995463a837694bc6f23762a515

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