wannacry | 05eb6f2b91bc1c30f75d869bf7ebd14331d68216d14d278d663a1587d8ee9c49

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
29-09-2024 05:35

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General

Target

fde4cd87fefc2f7c7c9bb3de815d34aa_JaffaCakes118.dll
Size

5.0MB
MD5

fde4cd87fefc2f7c7c9bb3de815d34aa
SHA1

794c19b000e8fef33bcfa1558aa6807d6e544b56
SHA256

05eb6f2b91bc1c30f75d869bf7ebd14331d68216d14d278d663a1587d8ee9c49
SHA512

74901cc8ac44730caa4364d93266205e960641b4298e6d258ee61082e31ebc5f32e7b91377f6e928aa030cf9b03ff0ab3c80dbe449bef1df72531b1b24c7fe46
SSDEEP

49152:SnAQqMSPbcBVQej/1INRAqxJM0H9PAMEcaEau3R8yAH1plAH:+DqPoBhz1aRAqxWa9P593R8yAVp2H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3303) 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
2340	mssecsvc.exe
4512	mssecsvc.exe
1580	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\tasksche.exe	mssecsvc.exe
File created	C:\WINDOWS\mssecsvc.exe	rundll32.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	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
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
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

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4432 wrote to memory of 2212	4432	rundll32.exe	82
PID 4432 wrote to memory of 2212	4432	rundll32.exe	82
PID 4432 wrote to memory of 2212	4432	rundll32.exe	82
PID 2212 wrote to memory of 2340	2212	rundll32.exe	83
PID 2212 wrote to memory of 2340	2212	rundll32.exe	83
PID 2212 wrote to memory of 2340	2212	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\fde4cd87fefc2f7c7c9bb3de815d34aa_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4432
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\fde4cd87fefc2f7c7c9bb3de815d34aa_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2212
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2340
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:1580

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:4512

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
556803ff2c89eb4954ddba4f62d93baf

SHA1
458044060d035b25c51bea4a9abfde21b77da4e2

SHA256
fcb9fc855e483f404c2386bcebe5c1a48e705fe5a85a750b716c95aea682ed85

SHA512
db1e74b4ce14a98c80919673a96505fdc2e90f36f974251c3e1675438a14994c7ae057fc92af3ee0638d5fade91334d20aaa6ab5742fe4319a3f98a9cdd45494

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
7258b2886f930f6010ef7aa3e67a671b

SHA1
e21a6b4767ca5d55dc638724c88ba68c51522a17

SHA256
432b7984e7607980a4054d1f9d29a21cdfa855fc2ac346625f309f2f2a592518

SHA512
f0b8bfd1416d3153a42fc74002a025874e0c2623da70361dd53b0466ba8986572bb53210cbfe435bd599d9ac2fd606871dd8d29bd8416716d509765715f8c5d6

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