wannacry | 9433714c0f9c4ee4345f8c9c239bc0070ccc62aacc87760a1e8379726f258979

Analysis

max time kernel
151s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
24/05/2024, 08:46

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General

Target
9433714c0f9c4ee4345f8c9c239bc0070ccc62aacc87760a1e8379726f258979.dll
Size 5.0MB
Sample240524-kpbrrsbf75
SHA256 9433714c0f9c4ee4345f8c9c239bc0070ccc62aacc87760a1e8379726f258979
MD5 6d72a26ac1f70167935613dfc6ed93bf
SHA1 e95d1b452a8188f313ffb1336d7407a70a826dd5
SHA512 811dbe47c9a8127c261f4994e9ff56f43c8b2cefbfa4cece38c5d83077cec282a26a24602d63c342e56b8cc0b746d6211db560e3fc5473d015bcd42005ffc926
SSDEEP 98304:TDqPoBhz1aRxcSUDk36SAEdhvxWa9X8yAVp2H:TDqPe1Cxcxk3ZAEUaR8yc4H
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 (2918) 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
5008	mssecsvc.exe
2724	mssecsvc.exe
3388	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\mssecsvc.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvc.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 2332 wrote to memory of 5016	2332	rundll32.exe	92
PID 2332 wrote to memory of 5016	2332	rundll32.exe	92
PID 2332 wrote to memory of 5016	2332	rundll32.exe	92
PID 5016 wrote to memory of 5008	5016	rundll32.exe	93
PID 5016 wrote to memory of 5008	5016	rundll32.exe	93
PID 5016 wrote to memory of 5008	5016	rundll32.exe	93

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\9433714c0f9c4ee4345f8c9c239bc0070ccc62aacc87760a1e8379726f258979.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2332
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\9433714c0f9c4ee4345f8c9c239bc0070ccc62aacc87760a1e8379726f258979.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:5016
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:5008
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:3388

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:2724

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=3744 --field-trial-handle=3192,i,2785050981002401924,4037047756083432660,262144 --variations-seed-version /prefetch:8
1⤵
PID:2068

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 936d74fd89ddf4736979d9da96a37a22a0cb513480d9449999f730f1c006046f
MD5 3f3393a94965480637f611a523caf0de
SHA1 03805196d601f25c613dc882d6d6ab833296e967
SHA512 43316970e2b5315cd3856d9d1f6ed25ec4a0c26e927b6b87f376a84bfe227faad93d77b76f045ae04eede1d3ea1176e436ff47c066ad75e231e2e792f7fc8f39
SSDEEP 98304:XDqPoBhz1aRxcSUDk36SAEdhvxWa9X8yAVp2HI:XDqPe1Cxcxk3ZAEUaR8yc4HI
MD5 SHA1 SHA512 SSDEEP

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 c89b3dbc3001836dc13103e56b4731c3d7e589090753517c88fbe35a76d66eec
MD5 34fc62dc858e3c87fa5040e9bc9bf08c
SHA1 6c6c0e3bc6882ba6dc58f3275b9a326b705b39b0
SHA512 3232c7b01636222092e2a98151174585dba1c98fe77bf4cf5b867079477e706b4381501d85cb7ff9808f572ee7417e03d1150760769ae616f5b261917795fa35
SSDEEP 98304:QqPoBhz1aRxcSUDk36SAEdhvxWa9X8yAVp2Hj:QqPe1Cxcxk3ZAEUaR8yc4Hj
MD5 SHA1 SHA512 SSDEEP