wannacry | af6d37c5e5fd674c31f423977fa2a13dfaa72e72603a5b1ada995542aae19bcd

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
23-08-2024 23:13

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General

Target

bd89588ed9de2ca545b48ae157f8a649_JaffaCakes118.dll
Size

5.0MB
MD5

bd89588ed9de2ca545b48ae157f8a649
SHA1

e14b445870e941d1affa582e38e394fcbfe90391
SHA256

af6d37c5e5fd674c31f423977fa2a13dfaa72e72603a5b1ada995542aae19bcd
SHA512

e6d308de8b85928c8451abf7647ae00a5a6958158cddb34369b16f58d0e0e036ef1fd08b2e0e7ddc953b543562d5bdac930c599f4a1f44bb0efec2a9ffcdc2a3
SSDEEP

24576:sbLgdeQhfdmMSirYbcMNgef0QeQGP18/ZMOm/3hyw6GzBmg:snjQqMSPbcBVQePPChm/Ryw6GzBd

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3249) 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
1084	mssecsvc.exe
2584	mssecsvc.exe
2736	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 System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\counters.dat	mssecsvc.exe

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 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 3008 wrote to memory of 3048	3008	rundll32.exe	30
PID 3008 wrote to memory of 3048	3008	rundll32.exe	30
PID 3008 wrote to memory of 3048	3008	rundll32.exe	30
PID 3008 wrote to memory of 3048	3008	rundll32.exe	30
PID 3008 wrote to memory of 3048	3008	rundll32.exe	30
PID 3008 wrote to memory of 3048	3008	rundll32.exe	30
PID 3008 wrote to memory of 3048	3008	rundll32.exe	30
PID 3048 wrote to memory of 1084	3048	rundll32.exe	31
PID 3048 wrote to memory of 1084	3048	rundll32.exe	31
PID 3048 wrote to memory of 1084	3048	rundll32.exe	31
PID 3048 wrote to memory of 1084	3048	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\bd89588ed9de2ca545b48ae157f8a649_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3008
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\bd89588ed9de2ca545b48ae157f8a649_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3048
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:1084
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2736

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:2584

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
00f1bb90273f4b21702c5663193f33b4

SHA1
ca215d1b29692109856451916fcd3007503d3e08

SHA256
825dcee1ca1726955c9ed93e02724f600d4be5586ead8bed5f9d252cc01f6358

SHA512
b12918db4bfdd8a6c4422ed9b8e51ddc3ec7cf90041ca892998ea66ed47b2e907e989093a9dc981e2049e9781e9d309c8f8633e13ef72bc0d3e6accdf35c2927

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
0c9fd9303867706cb60abde2bd6f26b3

SHA1
4495d62b196895c4481da1a34674de6ee0bd01bb

SHA256
a92cfa797561c6859f6131b39bc8e250ee34ed28dba019797863950b45d417ff

SHA512
07650c5da656ce252dec1d01ef8dc5e0ff75cbcc02f91231463bee5f61c434975358e9d07a458739378d79cf1926f1a467e6e0baa1bbe7c6779daa757b9b35ed

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