wannacry | 125f6ac932a8434ddb790b25772bb73e07979a4273d9533fd21ac08ca0e93bc4

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
18/05/2024, 12:30

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General

Target
54b944ac2d5aa01418d4bd2edf3d8f2c_JaffaCakes118.dll
Size 5.0MB
Sample240518-pps39sbf2t
SHA256 125f6ac932a8434ddb790b25772bb73e07979a4273d9533fd21ac08ca0e93bc4
MD5 54b944ac2d5aa01418d4bd2edf3d8f2c
SHA1 0176822d14a9af9835133c4a0843de632baaa7f4
SHA512 90129729686f50e78a38f731f0aabde6aeac18c448ab6ec3efa7298b0c207b3f014336c7bc51dbcf4095cc09540133df818a9e5751fb8e1b5a25e3ed9c79dcad
SSDEEP 24576:SbLgddQhfdmMSirYbcMNgef0pE7A4kqAH1pNZtA0p+9XE:SnAQqMSPbcBVa8yAH1plA
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 (3295) 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
2300	mssecsvc.exe
820	mssecsvc.exe
3080	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 2284 wrote to memory of 3992	2284	rundll32.exe	82
PID 2284 wrote to memory of 3992	2284	rundll32.exe	82
PID 2284 wrote to memory of 3992	2284	rundll32.exe	82
PID 3992 wrote to memory of 2300	3992	rundll32.exe	83
PID 3992 wrote to memory of 2300	3992	rundll32.exe	83
PID 3992 wrote to memory of 2300	3992	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\54b944ac2d5aa01418d4bd2edf3d8f2c_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2284
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\54b944ac2d5aa01418d4bd2edf3d8f2c_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:3992
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:2300
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:3080

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:820

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 9533bfdc70889f27002f37547ef7b2ab135c436b47013a7a3e346b95eda07e38
MD5 55d39603be1a94d3a8e4a09ed518f3cf
SHA1 3672cd598c6ec464cb3894db55b13fa8af90ae23
SHA512 cd8213a61b61522e7c6497e7462b55d8e3ebe979d0e9a121898f5f22177b691d5ef241a47a3cd1cd28d5b1077189d66ad925ed5996bd93e0e99888d32138e2db
SSDEEP 24576:2bLgddQhfdmMSirYbcMNgef0pE7A4kqAH1pNZtA0p+9XE:2nAQqMSPbcBVa8yAH1plA
MD5 SHA1 SHA512 SSDEEP

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 0bb994afc567ca1cac648b29c559069eafe14ec6a2979697428e2446e3750313
MD5 d31cd792c7838ba2f502678d4a50337b
SHA1 77e59dfa8f916343b65de03566cad285335f443b
SHA512 2656de11f96d5e5a11cf52bef79160fce1fed908c0553948e5cdb5869ce7c6f1a73173b8f06433c05e5f89c6c2c35f7c155aaa608145e56f490878d89d9559fd
SSDEEP 24576:nQhfdmMSirYbcMNgef0pE7A4kqAH1pNZtA0p+9XE:nQqMSPbcBVa8yAH1plA
MD5 SHA1 SHA512 SSDEEP