wannacry | 23d125a5154e77a2aa89407f14d6fce217bbf224144b7f8fcffff19bfac15668

Analysis

max time kernel
150s
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
04-06-2024 02:48

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General

Target

936e496b96305a8133e70ef2aead7046_JaffaCakes118.dll
Size

5.0MB
MD5

936e496b96305a8133e70ef2aead7046
SHA1

70697b299613aaeb917954e0143459dc6c6c007f
SHA256

23d125a5154e77a2aa89407f14d6fce217bbf224144b7f8fcffff19bfac15668
SHA512

e868e7126213dd8da13f7fdc71b0849c5df0c5b328a8af63f66e45d2860f1ada5d2e7f9e357a1db2ae0207e2bf9627fdc04ab28034309c813a5a73641e6bdd7e
SSDEEP

49152:znAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvxJM0H9PAMEc:TDqPoBhz1aRxcSUDk36SAEdhvxWa9P5

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3278) 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

3856 mssecsvc.exe
4456 mssecsvc.exe
2384 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
3856	mssecsvc.exe
4456	mssecsvc.exe
2384	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 4144 wrote to memory of 5004	4144	rundll32.exe	rundll32.exe
PID 4144 wrote to memory of 5004	4144	rundll32.exe	rundll32.exe
PID 4144 wrote to memory of 5004	4144	rundll32.exe	rundll32.exe
PID 5004 wrote to memory of 3856	5004	rundll32.exe	mssecsvc.exe
PID 5004 wrote to memory of 3856	5004	rundll32.exe	mssecsvc.exe
PID 5004 wrote to memory of 3856	5004	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\936e496b96305a8133e70ef2aead7046_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4144

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\936e496b96305a8133e70ef2aead7046_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:5004

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:3856

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2384

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:4456

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
da628998882e9c3de52f7dc9e932bfcc

SHA1
11fbea70fa2ceb2787a8fd5d0909cddd5ad32061

SHA256
81805a928e0b2b79b8d436fd234e1322a164dc6bec4edd9092f74958dc82d780

SHA512
d22b7eddee2c5b1cbb47efd3566db4a22fe66a894f2b2b74f9ab372cf38b41694ff238a6ef0495380c31b99e65ffa0c2813b241ee643d24ee3b5d807d189b219

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
0ca614fe3ca4604907cfba73c3b40815

SHA1
104e039f30626d60f160d1eaf32733c856cb26cd

SHA256
9ca0d86ed9f2c9a85d6dd1316d3f5b25d9fe2b2560340d9295900655e05d6a69

SHA512
c7c8d541080c667f671d5d5688e71468379bcc5989b075e4c9670f7c6a34f388e755bc7c360486b36a54614fa933cd23615b30d0fe341499437e215630f2ddd2

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