wannacry | f5e0b725d2fb35c1b4a9a2ac6efb3d4a3e7aa9fb9422022bc19082ef8190128e

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
22/05/2024, 20:31

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General

Target
6887821d151dc76e97740655d040af67_JaffaCakes118.dll
Size 5.0MB
Sample240522-zankcaff33
SHA256 f5e0b725d2fb35c1b4a9a2ac6efb3d4a3e7aa9fb9422022bc19082ef8190128e
MD5 6887821d151dc76e97740655d040af67
SHA1 0d7915053db68cf89ac984975fe5eebcf4c0dbc7
SHA512 bc1b6362d6f018cc43cf2f52a178ee20251d1099169c498e37216c82961291d3be91dc667866067a7cd809f6e9cbb39a1a9b0773b09c726136f6743597137218
SSDEEP 24576:SbLgddQhfdmMSirYbcMNgef0qMEcpcL7nEaut/8uME7A4kqAH1pNZtA0p+9XEk:SnAQqMSPbcBVqMEcaEau3R8yAH1plAH
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 (3324) 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
2580	mssecsvc.exe
3552	mssecsvc.exe
4948	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 5104 wrote to memory of 4032	5104	rundll32.exe	82
PID 5104 wrote to memory of 4032	5104	rundll32.exe	82
PID 5104 wrote to memory of 4032	5104	rundll32.exe	82
PID 4032 wrote to memory of 2580	4032	rundll32.exe	83
PID 4032 wrote to memory of 2580	4032	rundll32.exe	83
PID 4032 wrote to memory of 2580	4032	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\6887821d151dc76e97740655d040af67_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:5104
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\6887821d151dc76e97740655d040af67_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:4032
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:2580
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4948

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:3552

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 e130372fc98f52cc794788940b75c8fb11017bbb64d1df9849752c23060ccd41
MD5 9d33bfa57dea52c3d1d21c2a0bb2bfc3
SHA1 1711cd3bbb91d1f82a5d9a465171343046f1f6bf
SHA512 38e431417bb941ccb21c29ad02068d5b6c6ec5bee451b4193cfdc6753b3332fe4bc8f9ea54a46b503fa8220e1d02d28d13b380b81ce3e4ee4d1436bf23ee4c7a
SSDEEP 24576:2bLgddQhfdmMSirYbcMNgef0qMEcpcL7nEaut/8uME7A4kqAH1pNZtA0p+9XEkI:2nAQqMSPbcBVqMEcaEau3R8yAH1plAHI
MD5 SHA1 SHA512 SSDEEP

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 66d93625cd977147c28dc0bd091586fe6d5149ac9b8da6c89eba0b849f19bb62
MD5 19cbe6b8c799727886ca99a69a320004
SHA1 da6f79f66ee82ca61c36d2b29ff09f6d474eabc6
SHA512 e70312e1cf2de6f5267aeb5e0a1572c2bc3fd436c1770d9d8c046cd08521e903baac9d3d650d255d968741de6b52ac33f99cedd069ab560f1ec5cf5feca2620e
SSDEEP 24576:nQhfdmMSirYbcMNgef0qMEcpcL7nEaut/8uME7A4kqAH1pNZtA0p+9XEkj:nQqMSPbcBVqMEcaEau3R8yAH1plAHj
MD5 SHA1 SHA512 SSDEEP