wannacry | 2443b040f9a4e5d90e3c48519be19b372ab4f43251e376fad9949a0609af0dbb

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
09-09-2024 05:19

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General

Target

d5b65a28be46c08495f31ea491075100_JaffaCakes118.dll
Size

5.0MB
MD5

d5b65a28be46c08495f31ea491075100
SHA1

e5fb8cda831e9841492f22f2bea925ecc431ba94
SHA256

2443b040f9a4e5d90e3c48519be19b372ab4f43251e376fad9949a0609af0dbb
SHA512

1e576acc101be8bb2209e605468b84f4d8fdc8bb247dc9fab86a0aadf7a65f92f5059a8819d1abc0819663500e31122d947e7aebf0fd03b20f331c5d718845c2
SSDEEP

98304:dDqPoBhz1aRxcSUDk36SAEdhvxWa9P593R8yAVp2H:dDqPe1Cxcxk3ZAEUadzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3300) 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
400	mssecsvc.exe
4908	mssecsvc.exe
4196	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 4244 wrote to memory of 5060	4244	rundll32.exe	83
PID 4244 wrote to memory of 5060	4244	rundll32.exe	83
PID 4244 wrote to memory of 5060	4244	rundll32.exe	83
PID 5060 wrote to memory of 400	5060	rundll32.exe	84
PID 5060 wrote to memory of 400	5060	rundll32.exe	84
PID 5060 wrote to memory of 400	5060	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\d5b65a28be46c08495f31ea491075100_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4244
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\d5b65a28be46c08495f31ea491075100_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5060
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:400
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4196

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:4908

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
6084de0ea687436ed31e4acca6359ab2

SHA1
8e1a5642dd80c6acbfb806009ee1e86b4a3403c2

SHA256
b465036069bdce376d8f85cdcec05021e3435ccd665e49129a45477ed4f9bcf1

SHA512
98b171071d6150b9694352c29bb4deaad5ef3d078e215b1fdfca64a0bed943e9993362326bbcdeee695c1ba6d6a6ac9a12865fb591e86a3733d6fc7acf80a0a9

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
4027395f1e8277549e3d2e14b9c3cd0c

SHA1
80cac1803151646fcb5d42d0f937a2e35585ea3f

SHA256
88f5ec07e662e8aaf2c72e8fb1520b78012de553bf697a5606069211f0b8a74b

SHA512
9a2134b7bf91f58eef0bcf75023935adfc7ceae1f8469a75c920034b197f9a7f3a3920c4289025d3ead1cd7944fae100f6d6a3d84b6fb986646ea1c0307a94be

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