wannacry | 0003fa57b49fbc514bc48a2ce0c17e93307ab37123a65b3f5e1016b0d4f2f4fa

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
26/05/2024, 12:01

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General

Target
75695be8e3ddf0ef933283b55a36d22f_JaffaCakes118.dll
Size 5.0MB
Sample240526-n68plsbc74
SHA256 0003fa57b49fbc514bc48a2ce0c17e93307ab37123a65b3f5e1016b0d4f2f4fa
MD5 75695be8e3ddf0ef933283b55a36d22f
SHA1 26fbd0b2145fe8fee24524f245808c645c468556
SHA512 dd8b63b87d1b5048bbb258958b50b2478ae3a731418db087f6f5dbcb7e10ad41471a274fff5c8639076ff0b9bb0e601f5e584cbd71df1db26cc14c2d4b7513ce
SSDEEP 49152:znAQqMSPbcBVQej/1INRx+TSqTdX1HkQDH9PAMEcaEau3RthnAEYc8c6Ri5WN6n7:TDqPoBhz1aRxcSUDkK9P593R
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 (3237) 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
3992	mssecsvc.exe
1280	mssecsvc.exe
4860	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
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 1240 wrote to memory of 4772	1240	rundll32.exe	83
PID 1240 wrote to memory of 4772	1240	rundll32.exe	83
PID 1240 wrote to memory of 4772	1240	rundll32.exe	83
PID 4772 wrote to memory of 3992	4772	rundll32.exe	84
PID 4772 wrote to memory of 3992	4772	rundll32.exe	84
PID 4772 wrote to memory of 3992	4772	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\75695be8e3ddf0ef933283b55a36d22f_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1240
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\75695be8e3ddf0ef933283b55a36d22f_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:4772
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:3992
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4860

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:1280

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 8ca4a629ce9b83744eb540ade3d8a7b9f29c5b93c3347e1fb28f04a0a36857ce
MD5 616b8e8754c4484ff1ba66c06d105786
SHA1 f0d966cf5c5217f45a468a9e9a55c4834d33e0e0
SHA512 400a87545b3bba5fd566fd45f952c5bae33afda4414a25bfbe7c6273462a14aaba7e5a761d633a64ebdf997a5d749f1c0221f00c974c9b7fe81bd40eb6665b39
SSDEEP 49152:XnAQqMSPbcBVQej/1INRx+TSqTdX1HkQDH9PAMEcaEau3RthnAEYc8c6Ri5WN6n0:XDqPoBhz1aRxcSUDkK9P593Rw
MD5 SHA1 SHA512 SSDEEP

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 2ca947548bbf52ef67ccf1225522050b52ba5c064abb824ae02e3c9738f07745
MD5 dc83958a624ee07ad2a8b159ec622cd0
SHA1 7baf5ec72bc499dae335fae923dd4684617d133e
SHA512 4fb6fa4673158a5c8b9341cc07c48466117ca2c77b024e5fce1673649bd6ecba68e153839f8c400ca27cd76876f7f658ea1b089ff24fea433ce321295ea8680d
SSDEEP 49152:nQqMSPbcBVQej/1INRx+TSqTdX1HkQDH9PAMEcaEau3RthnAEYc8c6Ri5WN6njFT:QqPoBhz1aRxcSUDkK9P593RN
MD5 SHA1 SHA512 SSDEEP