wannacry | 79ca12b2c18a8f9ac7508178384e4b6459592d7ea8f4125018f0b9db5b04bac7

Analysis

max time kernel
150s
max time network
154s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
17-09-2024 09:05

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General

Target

e67af97c23d7df391973c3ed453a65dc_JaffaCakes118.dll
Size

5.0MB
MD5

e67af97c23d7df391973c3ed453a65dc
SHA1

ef3c913ce273786e0ec981d06a9cee26dd9f387b
SHA256

79ca12b2c18a8f9ac7508178384e4b6459592d7ea8f4125018f0b9db5b04bac7
SHA512

868191ca9d8667408a17ba5818f925e722624f86dbcc842b9d08df659a6c7e3f54049518e539e17efd5cc718c805f1cc14cbabd88b9c71330d0ac450b0ddf2b7
SSDEEP

98304:T8qPoBhzyaRxcSUDk36SAEdhvxWa9P593R8yAVp2H:T8qPeyCxcxk3ZAEUadzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3059) 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
2992	mssecsvc.exe
1208	mssecsvc.exe
3064	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 1756 wrote to memory of 696	1756	rundll32.exe	29
PID 1756 wrote to memory of 696	1756	rundll32.exe	29
PID 1756 wrote to memory of 696	1756	rundll32.exe	29
PID 1756 wrote to memory of 696	1756	rundll32.exe	29
PID 1756 wrote to memory of 696	1756	rundll32.exe	29
PID 1756 wrote to memory of 696	1756	rundll32.exe	29
PID 1756 wrote to memory of 696	1756	rundll32.exe	29
PID 696 wrote to memory of 2992	696	rundll32.exe	30
PID 696 wrote to memory of 2992	696	rundll32.exe	30
PID 696 wrote to memory of 2992	696	rundll32.exe	30
PID 696 wrote to memory of 2992	696	rundll32.exe	30

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\e67af97c23d7df391973c3ed453a65dc_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1756
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\e67af97c23d7df391973c3ed453a65dc_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:696
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2992
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:3064

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:1208

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
29c9128035380b20a6691573b09f4111

SHA1
a8feb5633d3a5133a1e98209d33864f17102a6a9

SHA256
b450fe2c830e6463d0d28fe3148a4c31cf0fbde2cf45444ee0548766a1a26bf9

SHA512
22f303adcd196ccbae3cf897a79c3bb64b27287d1df3c33a3bc43507313ec33181c8dd97449410bf0b6df06bb91df9bab5a537c5fbe14a46e1ce359bf546b675

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
bcd926f16788cec23d44a8ec1a2a1c58

SHA1
5952fa6e21717718ec8dfaee0be1d873dd130446

SHA256
1c4262a369bb4c7f5cb3ac30d3a3e3835b69732827aacccd86d097d697a38d63

SHA512
8ea88668230adec33be1b4b713b1ecf7cff0a850557efbdc8920a2974d22001a266fd9fefd562025b81754f49060a1673fac7b778193c767d4c206f3806ce70f

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