wannacry | f54fbfcb038af9a12d446f0150b97fef7a71ca02eec07c517f0ed00fdbea8185

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
06-09-2024 10:15

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General

Target

cf4f46336abeec03630297f846d17482_JaffaCakes118.dll
Size

5.0MB
MD5

cf4f46336abeec03630297f846d17482
SHA1

9bd7e03423cda2792e9f9dfc74fbf517fcbbc585
SHA256

f54fbfcb038af9a12d446f0150b97fef7a71ca02eec07c517f0ed00fdbea8185
SHA512

b4c5f054991a2a6c1298d92756a4ec423bdedcc6d853882e2a4c65275765b08258f2c46c5d48681dc60d26887f994d8baa48b3e60bc0df3054f28b570ef8f307
SSDEEP

98304:TDqPoBhz1aRxcSUDk36SAEdhvxWa9P593:TDqPe1Cxcxk3ZAEUadz

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3322) 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
756	mssecsvc.exe
2140	mssecsvc.exe
4432	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

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	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\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 4484 wrote to memory of 3672	4484	rundll32.exe	83
PID 4484 wrote to memory of 3672	4484	rundll32.exe	83
PID 4484 wrote to memory of 3672	4484	rundll32.exe	83
PID 3672 wrote to memory of 756	3672	rundll32.exe	84
PID 3672 wrote to memory of 756	3672	rundll32.exe	84
PID 3672 wrote to memory of 756	3672	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\cf4f46336abeec03630297f846d17482_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4484
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\cf4f46336abeec03630297f846d17482_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3672
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:756
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4432

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:2140

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
c18efac56280dfe18ebd1f361029d3f7

SHA1
b079ad82c2341e9178ced0b6a62a484a12075b56

SHA256
d013be1440f64e234c7631f2a3bb1b4d7c12bcb97d3804dc0e66753cde13ebc8

SHA512
8d1b77db6ad14e282cbcd3424318ee1457430e55d94fc7e27c528060082ec968d7ddee605784cc08ce216bcbed7486991dd36168bc01e3a56268c2d33b828191

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
fc0195c3fbc9d1ba19811d3c36b2bea4

SHA1
d618abf74712f8730fbad1d0988d1c30e1ec036b

SHA256
0c2837a2d107e6f9b508e63a48da7ef89e902907df6102a9de2fd2509316f739

SHA512
01423a0dd12ce2b337ef97087073945c9282cc0c51d8be12c43425e3357292b92f29ed43af52e7d6ff34adbb1cc10f8b34d2362995b3a9248bad71337b92d965

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