wannacry | 1f04efbf85a2b196e5f696cb324936a0435effc516af128d32f1c101fe2640a8

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
10-09-2024 14:35

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General

Target

d864a726081c0efb148b597a3bd94233_JaffaCakes118.dll
Size

5.0MB
MD5

d864a726081c0efb148b597a3bd94233
SHA1

9b662a6671fea44ae301f7970f375818e96d1052
SHA256

1f04efbf85a2b196e5f696cb324936a0435effc516af128d32f1c101fe2640a8
SHA512

015bf40553c861381434b43fa796cd5621b08ce10328b14f1719171de4bc81d00702fe444685f4903ec3abd7ffa75dd8f4f96e198cca2dc7b54b8477eb0ccff5
SSDEEP

98304:TDqPoBhz1aRxcSUDk36SAEdhvxWa9P593d:TDqPe1Cxcxk3ZAEUadzd

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3337) 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
4716	mssecsvc.exe
2204	mssecsvc.exe
5116	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	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
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
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3056 wrote to memory of 4172	3056	rundll32.exe	83
PID 3056 wrote to memory of 4172	3056	rundll32.exe	83
PID 3056 wrote to memory of 4172	3056	rundll32.exe	83
PID 4172 wrote to memory of 4716	4172	rundll32.exe	85
PID 4172 wrote to memory of 4716	4172	rundll32.exe	85
PID 4172 wrote to memory of 4716	4172	rundll32.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\d864a726081c0efb148b597a3bd94233_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3056
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\d864a726081c0efb148b597a3bd94233_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4172
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:4716
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:5116

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:2204

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
7d7b73a045d0e9cf63a6ad979dfd533c

SHA1
74c3da5742b78a20a68d7104c9b4bc9a1a8f1a95

SHA256
124244c66879bd5b1693d1e68f6cafddc1e22af88587044bf684e47c6d2b7373

SHA512
20390b60bc3bda51fdebe569acb959d7993352be88562f06b4af66656614b15ac410379c8c9471627a356426544b2145b9a589097ebfb416002f6ca9307b60da

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
19d2d8ca2d14814ab80afb1eee596ff4

SHA1
bdf13af32fba908ef8915c551ab862fbf8c74102

SHA256
3013d22904bb73c0fb1de97c1a2430a60ba32cd666747c70b43c6701084ea69a

SHA512
7af26324f164a9ee7bc892c5be4f34c12871c85cfcfd447c74f589739334c20985d8871abeed7a2c58fa325ae7ae02afe16b96570eea45c487d90e13cd8b322e

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