wannacry | 9443b99b4839e7df78a09682c686ff54464d3edd9635bd05cf3c5e6211215c85

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
04/07/2024, 09:45

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General

Target
9443b99b4839e7df78a09682c686ff54464d3edd9635bd05cf3c5e6211215c85.dll
Size 5.0MB
Sample240704-lref4svcpj
SHA256 9443b99b4839e7df78a09682c686ff54464d3edd9635bd05cf3c5e6211215c85
MD5 7823636f9ce01306178c1ee7772ad831
SHA1 8895257915c33299a6bc30b064267d5959aa4440
SHA512 bba25f09d4e6162a9d013343bec1b71fb1737e97bd3816fca3f366a33fdc3eee93bd6c6eb3097e7efed02aa325f55312fd6e1aff039b07d43d9376747b120e54
SSDEEP 12288:yvbLgPlu+QhMbaIMu7L5NVErCA4z2g6rTcbckPU82900Ve7zw+K+DWe:SbLgddQhfdmMSirYbcMNgef0Z
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3349) 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

pid	Process
3400	mssecsvc.exe
4576	mssecsvc.exe
4484	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

description	ioc	Process
File created	C:\WINDOWS\tasksche.exe	mssecsvc.exe
File created	C:\WINDOWS\mssecsvc.exe	rundll32.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
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
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

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4488 wrote to memory of 3268	4488	rundll32.exe	94
PID 4488 wrote to memory of 3268	4488	rundll32.exe	94
PID 4488 wrote to memory of 3268	4488	rundll32.exe	94
PID 3268 wrote to memory of 3400	3268	rundll32.exe	95
PID 3268 wrote to memory of 3400	3268	rundll32.exe	95
PID 3268 wrote to memory of 3400	3268	rundll32.exe	95

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\9443b99b4839e7df78a09682c686ff54464d3edd9635bd05cf3c5e6211215c85.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4488
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\9443b99b4839e7df78a09682c686ff54464d3edd9635bd05cf3c5e6211215c85.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:3268
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:3400
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4484

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:4576

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=4192,i,2029050989380753659,15333598055019363793,262144 --variations-seed-version --mojo-platform-channel-handle=4540 /prefetch:8
1⤵
PID:4876

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

mssecsvc.exe

Path C:\Windows\mssecsvc.exe
Size 3.6MB
SHA256 864ab3e65fcc93d75cea25920a24cd068cbd9a5b6d6f25bf625fc4e4e070848b
MD5 15527dc4d7c60836e7f3458073fa8be9
SHA1 8d06fc2029c35e27069ddb6fd22b167f7fbe4b09
SHA512 90117053131d77eda07bc5279535dcc0de5af787564c993878a2b006d85332675341bbcf4aaaa1c45a77c7fefa63262e9a9bff68aecb2d5ce5ed249cf21b30d2
SSDEEP 12288:GvbLgPlu+QhMbaIMu7L5NVErCA4z2g6rTcbckPU82900Ve7zw+K+DWeU:2bLgddQhfdmMSirYbcMNgef0Zb
MD5 SHA1 SHA512 SSDEEP

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 b474d51deda614d1af02d050e2a1ab65388831baef98cd225273d112e55bb990
MD5 a8ce75464228a717b735cf3105a702a9
SHA1 e13da728e8e1461b05a670bf8af87fb22e83f2bd
SHA512 40996e61585b8386c6a4b8ab5f97213a27e138c2f7fb0a14a0b51415b9888eb869e960840a17077a4c1276b4ce9fa7a9710511f44c5179ea2fad1f7f2bd24baa
SSDEEP 12288:nQhMbaIMu7L5NVErCA4z2g6rTcbckPU82900Ve7zw+K+DWP:nQhfdmMSirYbcMNgef0ZP
MD5 SHA1 SHA512 SSDEEP