wannacry | b6bf5f773318037e9b2b0a7483f43355896cccbf1aabe6ffd53cb18cdbfb6168

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
14/09/2024, 10:31

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General

Target
e0020ea03cbb99306ed0dc33b4906829_JaffaCakes118.dll
Size 5.0MB
Sample240914-mkptyayhml
SHA256 b6bf5f773318037e9b2b0a7483f43355896cccbf1aabe6ffd53cb18cdbfb6168
MD5 e0020ea03cbb99306ed0dc33b4906829
SHA1 7530d9f8292c9d5fa4ed1afb231a774124492aaf
SHA512 69ad1881a2e98746ddbecef74af210a1c786eac63c51091dddee15207f5cecb8596cbc92d016c9056b9ef2b93b5544050fe00e937945d5d014cd5a24300cc549
SSDEEP 98304:gzqPoBhz1aRxcSUdYdhvxWa9P593R8yAVp2H:gzqPe1CxccUadzR8yc4H
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3248) 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
3180	mssecsvc.exe
3612	mssecsvc.exe
4248	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 3952 wrote to memory of 3012	3952	rundll32.exe	83
PID 3952 wrote to memory of 3012	3952	rundll32.exe	83
PID 3952 wrote to memory of 3012	3952	rundll32.exe	83
PID 3012 wrote to memory of 3180	3012	rundll32.exe	84
PID 3012 wrote to memory of 3180	3012	rundll32.exe	84
PID 3012 wrote to memory of 3180	3012	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\e0020ea03cbb99306ed0dc33b4906829_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3952
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\e0020ea03cbb99306ed0dc33b4906829_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3012
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:3180
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4248

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:3612

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

mssecsvc.exe

Path C:\Windows\mssecsvc.exe
Size 3.6MB
SHA256 de4f6432fcadb8b0dad7967a4fffa2c44de162d6991033e5a5bd5e623a54750c
MD5 5a15274fabb6bbbf505e66370dd84599
SHA1 0301510da02da1ac9b4eb70d458a09e59dd84299
SHA512 8bf46bed5299d8e14e0c27162b01dc8013342b829f8478c9649d0b2ce77fcf4ff97b9f19526c7d542714bc0aca4015c9173aa32d90659dc57841ad33f929bd52
SSDEEP 98304:czqPoBhz1aRxcSUdYdhvxWa9P593R8yAVp2HI:czqPe1CxccUadzR8yc4HI
MD5 SHA1 SHA512 SSDEEP

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 4baf1c1fbdd3bc8ec6a867e407d309a704ca61bc472d8d39678a3c425968070f
MD5 cd4442236ad799dde0c32f8af6a27175
SHA1 df97b6a4fd84181c94f22fa76da0b3e707931420
SHA512 a84820a927541f8318c432b728b3b10e631e0b31049e2d1deded9137b51e0f32559dfaab1abd2714677a69d9f9ec8b594dc789f9df4f89ea0bc601dafbb66261
SSDEEP 98304:QqPoBhz1aRxcSUdYdhvxWa9P593R8yAVp2Hj:QqPe1CxccUadzR8yc4Hj
MD5 SHA1 SHA512 SSDEEP