wannacry | f17efd607395c546c7cd870a05f5cebf607609e051047df8ef4d8dc831b50760

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
11-05-2024 09:15

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General

Target

33d9881cf386853f2ffad76685b9340d_JaffaCakes118.dll
Size

5.0MB
MD5

33d9881cf386853f2ffad76685b9340d
SHA1

b46a85f2adfe51c43342d536f2fde4328ac6a2d6
SHA256

f17efd607395c546c7cd870a05f5cebf607609e051047df8ef4d8dc831b50760
SHA512

130904e9035884573b55cbe3c4bd2f9040ae9a20aa4d6274148153c39564c764bc3410c7e9fafd980fec2390abd960460e92ed020b1ce387869a525eb43ada8a
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P593R8yAVp2:+DqPe1Cxcxk3ZAEUadzR8yc4

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3103) 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

4848 mssecsvc.exe
2876 mssecsvc.exe
3952 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
4848	mssecsvc.exe
2876	mssecsvc.exe
3952	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 1800 wrote to memory of 2348	1800	rundll32.exe	rundll32.exe
PID 1800 wrote to memory of 2348	1800	rundll32.exe	rundll32.exe
PID 1800 wrote to memory of 2348	1800	rundll32.exe	rundll32.exe
PID 2348 wrote to memory of 4848	2348	rundll32.exe	mssecsvc.exe
PID 2348 wrote to memory of 4848	2348	rundll32.exe	mssecsvc.exe
PID 2348 wrote to memory of 4848	2348	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\33d9881cf386853f2ffad76685b9340d_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1800

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\33d9881cf386853f2ffad76685b9340d_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2348

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:4848

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:3952

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:2876

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=1420 --field-trial-handle=1928,i,13242902252791919845,10377620236057253993,262144 --variations-seed-version /prefetch:8
1⤵
PID:4200

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
effdba0b065ac5063a35e8778e6707a6

SHA1
1d2da67f250705d86d969da4311d0a977fdf9239

SHA256
89d714fa7f3b6398e36ae8f690e70fadc14a339136bf0bf9226bca9cae79f639

SHA512
7afda939ae0fed2f4b3f19ed170811ba76e3800607eea9238d07119176df39a923a50a9315e1498d9f8bd7c4e06fd4324dd91e4a552b34e3db1c09b40fc7bea8

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
b19c3d16e15df9ca9773be40f2f5f3e2

SHA1
2d6e8d30ccfb42813d1dca14bdff463d115052ad

SHA256
54e859d3814ff99b3152885ec84a1e743e8b1884a41c01a53ef480fde0b07fd7

SHA512
9623e9115848a79577a6e76968321d7e348f88a7dca31760170f3276e868d606d38da2024cdb67e0d8b0c4ddacc8e916ae61c0aab931a206604f195020d6f2ec

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