wannacry | a09267d29f96c96cdae515723511affadecdf4210b4842ad142a25fc445b9946

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
16/05/2024, 02:12

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General

Target
4913bef3153a460ba000e20dfcfc6bd2_JaffaCakes118.dll
Size 5.0MB
Sample240516-cms92afh6x
SHA256 a09267d29f96c96cdae515723511affadecdf4210b4842ad142a25fc445b9946
MD5 4913bef3153a460ba000e20dfcfc6bd2
SHA1 251cd89d8176ae36afa8603bc8b4806d40434d19
SHA512 9b7ec4ad9d5fa35476148f9b8740746d7c91b9a4f76bc9723a9f6b17e32bac798e7dcbe427f8885cc45269cebb6a885f72c6207b33c131068b1fba4ae2630fa0
SSDEEP 24576:SbLgddQhfdmMSirYbcMNgef0QeQjG/D8kIqRYoAdNLKz6626M+vbOSSqTPVXmiHt:SnAQqMSPbcBVQej/1INRx+TSqTdX1H
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 (3346) 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
1052	mssecsvc.exe
1212	mssecsvc.exe
4784	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
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

description	pid	Process	procid_target
PID 4620 wrote to memory of 3752	4620	rundll32.exe	82
PID 4620 wrote to memory of 3752	4620	rundll32.exe	82
PID 4620 wrote to memory of 3752	4620	rundll32.exe	82
PID 3752 wrote to memory of 1052	3752	rundll32.exe	83
PID 3752 wrote to memory of 1052	3752	rundll32.exe	83
PID 3752 wrote to memory of 1052	3752	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\4913bef3153a460ba000e20dfcfc6bd2_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4620
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\4913bef3153a460ba000e20dfcfc6bd2_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:3752
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:1052
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4784

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:1212

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 1f640223292b888a828264e213291bcd0576c93e3bdd743c0a5c03e3e92afcc3
MD5 28f265701ad1af13603171edc0cd26b5
SHA1 069760bbf5e9b4455f488bb176969bddd82842d4
SHA512 e9a1901e5ac50fce15f55de3ef3ad5b1d2943f242c5dc5e22a5e348d77e003933f6191474074bbcbde50fdf42aaba7cd9b2933da75522b058a826cc99b3c25d1
SSDEEP 24576:2bLgddQhfdmMSirYbcMNgef0QeQjG/D8kIqRYoAdNLKz6626M+vbOSSqTPVXmiHt:2nAQqMSPbcBVQej/1INRx+TSqTdX1H
MD5 SHA1 SHA512 SSDEEP

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 b314688acf46f5592ea9f4399a34300c07e0fc26444a6b9a354de89f353a2eed
MD5 088b638192d03a422cd8ca7d0892ef0d
SHA1 ca76cd7074907d77e6809255a3a5255941419344
SHA512 ae6fcf7204e8c964352857fd17769aaa83195e3323d53f37b16a913897a8a122233d32203130da8b3a8d180015637921fe432a7c3e2e89c17178c84537bc126b
SSDEEP 24576:nQhfdmMSirYbcMNgef0QeQjG/D8kIqRYoAdNLKz6626M+vbOSSqTPVXmiHt9:nQqMSPbcBVQej/1INRx+TSqTdX1HH
MD5 SHA1 SHA512 SSDEEP