wannacry | 6b554dcb67e00574995e5ba2edd00f3326c269cc37fae2ac9487de0fc64fd2f2

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
05-06-2024 02:40

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General

Target

9706a91b71d6469eee7460c4fe269cd7_JaffaCakes118.dll
Size

5.0MB
MD5

9706a91b71d6469eee7460c4fe269cd7
SHA1

ac9d010f4350f12ddb11ad027086939d13ebd6df
SHA256

6b554dcb67e00574995e5ba2edd00f3326c269cc37fae2ac9487de0fc64fd2f2
SHA512

1b011ebe840269139465db20b15d4a7d6cc2340dcd8b78d2b03def9e8af8a3bc31e55cf6f0bbb6a7e9ce3d3a700831864407bdc0348b5ad24017cce6f54b060f
SSDEEP

24576:SbLgddQhfdmMSirYbcMNgef0EE7A4kqAH1pNZtA0p+9XEk:SnAQqMSPbcBVZ8yAH1plAH

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3076) 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

2744 mssecsvc.exe
4236 mssecsvc.exe
1344 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
2744	mssecsvc.exe
4236	mssecsvc.exe
1344	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 2828 wrote to memory of 4436	2828	rundll32.exe	rundll32.exe
PID 2828 wrote to memory of 4436	2828	rundll32.exe	rundll32.exe
PID 2828 wrote to memory of 4436	2828	rundll32.exe	rundll32.exe
PID 4436 wrote to memory of 2744	4436	rundll32.exe	mssecsvc.exe
PID 4436 wrote to memory of 2744	4436	rundll32.exe	mssecsvc.exe
PID 4436 wrote to memory of 2744	4436	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\9706a91b71d6469eee7460c4fe269cd7_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2828

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\9706a91b71d6469eee7460c4fe269cd7_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4436

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2744

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:1344

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:4236

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=3936 --field-trial-handle=2304,i,6987730730348465820,3913273227385401271,262144 --variations-seed-version /prefetch:8
1⤵
PID:2748

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
2e395ce3d9579e3af489ce3ed72b7f1f

SHA1
e8ae8534e1b938e9615678693cc2526f740c6767

SHA256
6c1af9ec13b3cb0661bce252046f4fc528f3144329aabe82c069c3ff801f7d67

SHA512
550b242dfa26b9eb30bea2c458176dad5efad99ec5e791b6a3d0d1ce4e72a361a2025fd644b7cb069829ab90fce356fb3029c2228ae3f52f13dc887f58d0840c

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
79ddcfa88da7f0d77dacd228f7dfc55c

SHA1
cd411e2460f2028c80625977fae853eb2bd883ed

SHA256
6d1d6a1ec293a0194b1e5bffd8cc742e0af7a958cafbc581995c7cf016bdabbe

SHA512
78c747efa63dc48a5d61bc11d6988c6768c16ddf4f79dd44c827eb6cfea8a5c3ede3ce9302d3e2c6ba036552b2aa224545e80e6899067140a5910fd7036fb5ef

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