wannacry | 7a3ed2b72925bb270b6fc6e7e35953dc12e51ec52942460b5b5a1230dd017934

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
20/05/2024, 04:01

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General

Target
5d14531026b8490cbc359238ba824dfa_JaffaCakes118.dll
Size 5.0MB
Sample240520-elfzesag38
SHA256 7a3ed2b72925bb270b6fc6e7e35953dc12e51ec52942460b5b5a1230dd017934
MD5 5d14531026b8490cbc359238ba824dfa
SHA1 24fdf3e92f949f26cdcc4072874c6270e49ee1e8
SHA512 017b5a8d8b6c369886589bff17705c283b6c37bbd08a7d818ef4ccff7380e8f953b3b9ce1a6251f295501258b64173c6d113ce180a8d833d4b7d988dd48cc5fe
SSDEEP 49152:SnAQqMSPbcBVQej/1INRx+TSqTdX1HkQ43R8yAH1plAH:+DqPoBhz1aRxcSUDkz3R8yAVp2H
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 (3085) 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
2328	mssecsvc.exe
1012	mssecsvc.exe
4416	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\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
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4644 wrote to memory of 4076	4644	rundll32.exe	82
PID 4644 wrote to memory of 4076	4644	rundll32.exe	82
PID 4644 wrote to memory of 4076	4644	rundll32.exe	82
PID 4076 wrote to memory of 2328	4076	rundll32.exe	83
PID 4076 wrote to memory of 2328	4076	rundll32.exe	83
PID 4076 wrote to memory of 2328	4076	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\5d14531026b8490cbc359238ba824dfa_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4644
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\5d14531026b8490cbc359238ba824dfa_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:4076
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:2328
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4416

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:1012

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 7b2a82db208fb9721779b5d73b0910400367a97877ea03dc59fe04c6eb76ecde
MD5 f15f9a2b69b17fad2d08438c1962dc3f
SHA1 530d70ec9ee74f4d5020c48bed7c5af271a7cea2
SHA512 1c2f4d1511bf80d660fb5902e2f5f42fd82b5ccf1214f1ba83b7ec1aec15e1afcfc3ab9e3935f82c3c146cf24cdefa63c308a4f59cbd24bf58b5d42679be38c8
SSDEEP 49152:2nAQqMSPbcBVQej/1INRx+TSqTdX1HkQ43R8yAH1plAHI:yDqPoBhz1aRxcSUDkz3R8yAVp2HI
MD5 SHA1 SHA512 SSDEEP

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 b9d207f4c8502a8dfd1cc4b3114639d24eecb955baba2bf4340af2a506b86310
MD5 23b2a05fb0e2bc41386fe290248ab538
SHA1 0c73894417c4fed3ba1288f24b52fca954d256bf
SHA512 c2be1057ccf59567e1b4fc6d4b207ea396f93c8e9d8d5ced29a1097f18892c6551972f34f984eabad1506c51f9eac08203b7717b1fd77d613e6122e04b0a51e4
SSDEEP 49152:nQqMSPbcBVQej/1INRx+TSqTdX1HkQ43R8yAH1plAHj:QqPoBhz1aRxcSUDkz3R8yAVp2Hj
MD5 SHA1 SHA512 SSDEEP