wannacry | b63a1b3002455f7d90d2215237113d5d277ae176dcc99e55f42fd82f7d3cfd49

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
19-09-2024 12:46

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General

Target

eb5d329f78f7dd2c0c683faae813b83e_JaffaCakes118.dll
Size

5.0MB
MD5

eb5d329f78f7dd2c0c683faae813b83e
SHA1

7eed68d84cc304207158d5e7dbd140abb1bd178d
SHA256

b63a1b3002455f7d90d2215237113d5d277ae176dcc99e55f42fd82f7d3cfd49
SHA512

531918ae23e54ea4a4345d4c26c5f71d6a901bef01435f71ffa7e67eed85eab372bd3062db53318847e46fd8c5879de32bed9727967047edf0910148d765e177
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P593Rl2H:+DqPe1Cxcxk3ZAEUadzRMH

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3209) 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
4520	mssecsvc.exe
4496	mssecsvc.exe
4504	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 3288 wrote to memory of 1048	3288	rundll32.exe	82
PID 3288 wrote to memory of 1048	3288	rundll32.exe	82
PID 3288 wrote to memory of 1048	3288	rundll32.exe	82
PID 1048 wrote to memory of 4520	1048	rundll32.exe	83
PID 1048 wrote to memory of 4520	1048	rundll32.exe	83
PID 1048 wrote to memory of 4520	1048	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\eb5d329f78f7dd2c0c683faae813b83e_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3288
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\eb5d329f78f7dd2c0c683faae813b83e_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1048
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:4520
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4504

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:4496

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
6cdddd289f90818941bc815c8d7c3db6

SHA1
a63a1f55b631d8e39fbda2733bd80905b4f67c6a

SHA256
6fd60932e2af896a93eead2fa6954bc7c194ec3e5586388ec346b799568b0328

SHA512
1933ed065a158caafe5bcb79bf0a5c2dcddeb85dd51711481bec7798b855c02a965c746748d24bc9182546d65510e7221a8a12c361b291d26367e4f190389ba4

Download Submit
C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
650552fb58e0f17ff2feee3376788f1b

SHA1
9fd42bf92ac87327eceea62ac59ebb3dd638aa7c

SHA256
41061abafadc6a2325563130c41455536961c0bfd7a898a8038cf0ed148deeb9

SHA512
050f760cddc28a22d9fdca040066275a36081297110587548c319a8d169af8d3c994e4550d7b119966f7fede590326af825aa98cd866c4a6e021302d1c6b9b82

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