wannacry | 10e443bbe21b9c634c8ae93ade1d96a2e958294959053abc416d017ab4c01894

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
13-06-2024 04:43

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General

Target

a3db5991f48652f653541f9143623263_JaffaCakes118.dll
Size

5.0MB
MD5

a3db5991f48652f653541f9143623263
SHA1

b91e3210b47e362d217eb89d20e6e80b7300e876
SHA256

10e443bbe21b9c634c8ae93ade1d96a2e958294959053abc416d017ab4c01894
SHA512

fbe9ceb268f7e52679742d112f62e99523b8c7ca79598eac7e25f20bf4e3024c9e878426c3ed02b497b0a5b3119ec3b32a730c8adbd662b3f1bfdcbfc37bb6e9
SSDEEP

49152:SnAQqMSPbcBF1hnFpozmNXkMFnnxGieSPrF4VNpnA3ZmUl:+DqPoBF8zmNUMpEi5PhKNpnA3Zm2

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3045) 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

3740 mssecsvc.exe
2608 mssecsvc.exe
812 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
3740	mssecsvc.exe
2608	mssecsvc.exe
812	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 3440 wrote to memory of 4796	3440	rundll32.exe	rundll32.exe
PID 3440 wrote to memory of 4796	3440	rundll32.exe	rundll32.exe
PID 3440 wrote to memory of 4796	3440	rundll32.exe	rundll32.exe
PID 4796 wrote to memory of 3740	4796	rundll32.exe	mssecsvc.exe
PID 4796 wrote to memory of 3740	4796	rundll32.exe	mssecsvc.exe
PID 4796 wrote to memory of 3740	4796	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a3db5991f48652f653541f9143623263_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3440

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a3db5991f48652f653541f9143623263_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4796

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:3740

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:812

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:2608

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 --field-trial-handle=3704,i,4778049104057176787,6631751660692402210,262144 --variations-seed-version --mojo-platform-channel-handle=4416 /prefetch:8
1⤵
PID:1544

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

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Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
870c9c6735342c61c336e2602e25bb72

SHA1
86fab6feeee6de49188530bffe8367e18d8fa80e

SHA256
41ab8d92d0ba45a81fefbf86a6ef1411658afd45647a937a844e36376238b301

SHA512
11eda36c4b6831b22ce6a1ac2a0dc8f564d7085f3e892b53b8cf57af979e7b56a479a8fa92ad14796f1df64dd10e8ccdfe835fbf9ffaf99aee2f4c301a021c60

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
2954e43e9a430ca0318d36b7674fb5fd

SHA1
21fd14ce48158950e8e7e87c03d414548fb6f92f

SHA256
88ac2a68beae3866340aaf750e5d71e7f65c8860b6d72ecc16004a981dbd8a59

SHA512
b1b03b9536b32838d89d4de7233ee492757c95e9e68746300266294d2c45ca5dfad635cd757aad35962fde1caad46a40126d23e8e89a8c746c963db37c80f03a

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