wannacry | a5832d6d06e0db070701957dfed2a564ea5e9f3744099c46001a9539649bf818

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
17-09-2024 10:33

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General

Target

e6a03e920acc645c14f7a4bb173c89d4_JaffaCakes118.dll
Size

5.0MB
MD5

e6a03e920acc645c14f7a4bb173c89d4
SHA1

bdb6d7ff74bd06d17476ba67714473bdd5fdfe50
SHA256

a5832d6d06e0db070701957dfed2a564ea5e9f3744099c46001a9539649bf818
SHA512

e056cbac3dc497fa4ec1be486cd29d8a926a36df87a3bcec422d74a528f4e0706569db91fead0dfd0383d88120a798a978f1768a9c2678482e663de23640fce6
SSDEEP

49152:znjQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnv:T8qPoBhz1aRxcSUDk36SAEdhv

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3243) 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
2332	mssecsvc.exe
3060	mssecsvc.exe
2516	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 1668 wrote to memory of 2296	1668	rundll32.exe	31
PID 1668 wrote to memory of 2296	1668	rundll32.exe	31
PID 1668 wrote to memory of 2296	1668	rundll32.exe	31
PID 1668 wrote to memory of 2296	1668	rundll32.exe	31
PID 1668 wrote to memory of 2296	1668	rundll32.exe	31
PID 1668 wrote to memory of 2296	1668	rundll32.exe	31
PID 1668 wrote to memory of 2296	1668	rundll32.exe	31
PID 2296 wrote to memory of 2332	2296	rundll32.exe	32
PID 2296 wrote to memory of 2332	2296	rundll32.exe	32
PID 2296 wrote to memory of 2332	2296	rundll32.exe	32
PID 2296 wrote to memory of 2332	2296	rundll32.exe	32

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\e6a03e920acc645c14f7a4bb173c89d4_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1668
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\e6a03e920acc645c14f7a4bb173c89d4_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2296
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2332
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2516

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:3060

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
ca9e084bc47a42f3c5f15fb4142bc467

SHA1
a8a43bbd4ef43b4faff94cff5a17ac42e2c2a95c

SHA256
90d39c41e81b12de191406fb75263d208f5e7841b47bcf77d7fdd4156f8bc1af

SHA512
49bab5ea4328897e57d4d22240049e5174fc9520c08f16ae2071e77acc10119c24a45c10393cef052370250356dd5c7b50a23456b8b33cfe2cdbdbbdf6841a42

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
ba8922fceaeed80297c3c391c8844b70

SHA1
2ef2a451fbcd42a938ae3d7bfad93dbc8ebe144f

SHA256
e3825cad783a302902576ca4cfae9fdfc8640a012876402c89e7dd22475cda91

SHA512
faee2d00623ab8a0db455a4b26074faed6da189220630f5260c331ed3d7f633f4cb253efaae25101c64ca836bea92b2de9e8c18614da483d4614b2e176d159bb

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