wannacry | 72f7e4e984d7b866d04d110d62ace0743f7229cd34889f5189cff9bb83084b9e

Analysis

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

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
23-08-2024 13:45

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General

Target

bbf9df803879eb3ca21ac1b623185b5d_JaffaCakes118.dll
Size

5.0MB
MD5

bbf9df803879eb3ca21ac1b623185b5d
SHA1

f8798ff9b0d4f0205ce2b2c5d8a310689e131736
SHA256

72f7e4e984d7b866d04d110d62ace0743f7229cd34889f5189cff9bb83084b9e
SHA512

fc3e5ffd426a277e7f5c48514cccbb36266811751c54ae10600095355cb27f32e70700b33f3b107509349cdb6c29a4e5279f1f9398dc9edda54599270fc2a522
SSDEEP

24576:zbLgddQhfdmMSirYbcMNgef0QeQjG/D8kIqRYoAdNLKz6626Wo/Gs:znAQqMSPbcBVQej/1INRAW+Gs

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (2938) 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
4696	mssecsvc.exe
2900	mssecsvc.exe
3096	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
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 3876 wrote to memory of 3984	3876	rundll32.exe	85
PID 3876 wrote to memory of 3984	3876	rundll32.exe	85
PID 3876 wrote to memory of 3984	3876	rundll32.exe	85
PID 3984 wrote to memory of 4696	3984	rundll32.exe	86
PID 3984 wrote to memory of 4696	3984	rundll32.exe	86
PID 3984 wrote to memory of 4696	3984	rundll32.exe	86

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\bbf9df803879eb3ca21ac1b623185b5d_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3876
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\bbf9df803879eb3ca21ac1b623185b5d_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3984
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:4696
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:3096

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:2900

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
404ed449b2e6c758ae005323470d3d6b

SHA1
5acc4178a2dba745555d71e3e8b17a48eef61e69

SHA256
3551641e8dcb505145d98214daf8a70858088da67ad15f862fcc37d099abc72b

SHA512
96340935fa7912fdcaca3d072557c1d8cd60662ed08fd906f4818d698a24ee8b3c59bdc722e3849ce51037e1e67267de1a9db915ad9307c630e232d88bf2169c

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
fab4b9c83e6cec59aacc65a149ee6528

SHA1
9854923a1d121037ada38031337b0f6576a7b2b0

SHA256
6bb133db6ad270a180724bb1a726d1004cff6cf19fb2c33cb0cb6dc727bd18e1

SHA512
a14f605f1c01a4fac911b2cea74c7faaef7061bb4c34313153a569257b01f667828546bbbbcc4f7ad079375140caac418d58314102d802441bec8f6d87cd14c2

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