wannacry | 462083a9b81e8eec6f13754f3d0029cd219a595b320240d2eb8f30d9e5337ed1

Analysis

max time kernel
142s
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
09-05-2024 01:42

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General

Target

27b1909032fd61c8538946b80e1196d7_JaffaCakes118.dll
Size

5.0MB
MD5

27b1909032fd61c8538946b80e1196d7
SHA1

068db3c25da3037222a410cdbfa4582daaff7187
SHA256

462083a9b81e8eec6f13754f3d0029cd219a595b320240d2eb8f30d9e5337ed1
SHA512

f22324929c57c480d1d854962f49e74fb03ab8d676fb3b4e2ea674cdaa4f97580251ba6d7eace1c814fdf4e9665ef45fe5c8d24c8c6ff937c67decd54e90a700
SSDEEP

49152:SnAQqMSPbcBVlvxJM0H9PAMEcaEau3R8yAH1plAH:+DqPoBDxWa9P593R8yAVp2H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3136) 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

3068 mssecsvc.exe
4640 mssecsvc.exe
2968 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
3068	mssecsvc.exe
4640	mssecsvc.exe
2968	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 1368 wrote to memory of 1520	1368	rundll32.exe	rundll32.exe
PID 1368 wrote to memory of 1520	1368	rundll32.exe	rundll32.exe
PID 1368 wrote to memory of 1520	1368	rundll32.exe	rundll32.exe
PID 1520 wrote to memory of 3068	1520	rundll32.exe	mssecsvc.exe
PID 1520 wrote to memory of 3068	1520	rundll32.exe	mssecsvc.exe
PID 1520 wrote to memory of 3068	1520	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\27b1909032fd61c8538946b80e1196d7_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1368

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\27b1909032fd61c8538946b80e1196d7_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1520

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:3068

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2968

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:4640

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
59e8cc0c47218b4a075e1b2160be005b

SHA1
ad69fdc23c8cb78bb510f2a81249c1d44de3a444

SHA256
d3b8f9a918475a0df82ec293bc6abd316361c974f52b6f41a8fa0bc5beca4f2f

SHA512
9aa2278d118cc621d87cadaa2520b8d1642569b212bb5ec4ebcd931accfbf019a491eefd92154b2a01d14591a2768dd35202edf574107f8ce2fecde7101f411b

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
d7977f48fb94d0bdf4cf2345275b3e8b

SHA1
62bb02a791cd17e3caec26daed70a5bda1564c78

SHA256
886a4559dc242d64ebd97faaadfbd31b8c448d7d84a686fa3e5ff208fa93c0c4

SHA512
af4b9ba90ec4c81e414343b99ca7beaba398d3f9b98f705b30432c0a5ecdf28c8d194a95c4168a7781162ccc142f127d3e0ed7fd5f0f01ed276e81b9d9643472

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