wannacry | 7bdbbd2abd90aaf93b613b67f261b8903bfb2f090a429d825fd688ea2f577bc0

Analysis

max time kernel
151s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
06-05-2024 07:54

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General

Target

1b812b0051e0cef2acc712d50f7e4a51_JaffaCakes118.dll
Size

5.0MB
MD5

1b812b0051e0cef2acc712d50f7e4a51
SHA1

aeac55264a3d590fda9a049d1967d3ae3a24c4af
SHA256

7bdbbd2abd90aaf93b613b67f261b8903bfb2f090a429d825fd688ea2f577bc0
SHA512

d2bcc1f66f0648bdf4b33168292bf8571d2a0de28fa6ccb8192a8397ab5816b919e884f7324224e0e95f7f836096d528922326f00df13069d4e9646f0ac3093f
SSDEEP

49152:SnAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAA:+DqPoBhz1aRxcSUDk36SA

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (2997) 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

2364 mssecsvc.exe
2740 mssecsvc.exe
3260 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
2364	mssecsvc.exe
2740	mssecsvc.exe
3260	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 3968 wrote to memory of 2296	3968	rundll32.exe	rundll32.exe
PID 3968 wrote to memory of 2296	3968	rundll32.exe	rundll32.exe
PID 3968 wrote to memory of 2296	3968	rundll32.exe	rundll32.exe
PID 2296 wrote to memory of 2364	2296	rundll32.exe	mssecsvc.exe
PID 2296 wrote to memory of 2364	2296	rundll32.exe	mssecsvc.exe
PID 2296 wrote to memory of 2364	2296	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\1b812b0051e0cef2acc712d50f7e4a51_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3968

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\1b812b0051e0cef2acc712d50f7e4a51_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2296

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2364

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:3260

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:2740

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 --mojo-platform-channel-handle=2268 --field-trial-handle=2244,i,11878111470816612087,2265290141962607370,262144 --variations-seed-version /prefetch:8
1⤵
PID:948

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
ca64dda04213e36c0a863746289ec212

SHA1
e252e7f48fea152780bd7256b560e48ad87ba4a9

SHA256
e16c3a88ae9175bacccc4bc7c9e8f6e38e1226e37d1430d4205b2af50b02e655

SHA512
0ed99968f426d2b5348364f041d56fd6652aaf48e097996f966a09b7940a0eadb7e81720bb97f5ea6c8ff25b140712f3da734a4125b90080112c9ca67bab103f

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
822cfb2f15998786df89a33e716cbdef

SHA1
c9d007274bfd628c164074a1fc2b35ae84293691

SHA256
44311ce86114f8b11bea2fda93707000e951fdd54df1d575b69c0acff0192b52

SHA512
17408de0c6692557c3d280625f9aed3401adb10a4735c91900df163be4b33d6c3c6c2527905fb090a3bed15424b1fc564790c1e311966c56cd321be03c4b4d29

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