wannacry | 3d9a477aa76920034d190f65bf86c197558e723b5526eec2ee6e9248d80c4d7b

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
14-09-2024 22:38

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General

Target

e12d0c0ba668e1592c5de9390f3005dc_JaffaCakes118.dll
Size

5.0MB
MD5

e12d0c0ba668e1592c5de9390f3005dc
SHA1

d66a836c9360fc0d796b044b4db533feb4e2839f
SHA256

3d9a477aa76920034d190f65bf86c197558e723b5526eec2ee6e9248d80c4d7b
SHA512

76f70018ace5b3407dc9b77631fcd1c37597e0c023d317af090a5cb557953ffd57ab827b6965ac166b7462e18cd671ff6be0c540ca03906df371fab964e571b7
SSDEEP

49152:SnAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnv:+DqPoBhz1aRxcSUDk36SAEdhv

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3325) 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
1000	mssecsvc.exe
4704	mssecsvc.exe
3388	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
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
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4440 wrote to memory of 4588	4440	rundll32.exe	83
PID 4440 wrote to memory of 4588	4440	rundll32.exe	83
PID 4440 wrote to memory of 4588	4440	rundll32.exe	83
PID 4588 wrote to memory of 1000	4588	rundll32.exe	86
PID 4588 wrote to memory of 1000	4588	rundll32.exe	86
PID 4588 wrote to memory of 1000	4588	rundll32.exe	86

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\e12d0c0ba668e1592c5de9390f3005dc_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4440
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\e12d0c0ba668e1592c5de9390f3005dc_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4588
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:1000
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:3388

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:4704

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
796da4e9000dc40c066553f371f9d2a3

SHA1
12c852e8f548df9f5d723d21f44f4d404e82f955

SHA256
c864a0f43b7085d5514ec0efa8c8bc1006aa3d51cb84aa43838c56da725f1b2f

SHA512
773a99202e485ecccbf45a6dae4f8dbae3927a9fb54a4a010e3319e37ab6ca590bddd5ac47c1fefcf2b5a783a41a0e711e67026e726e688b6867e3205f2ceae8

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
ba8922fceaeed80297c3c391c8844b70

SHA1
2ef2a451fbcd42a938ae3d7bfad93dbc8ebe144f

SHA256
e3825cad783a302902576ca4cfae9fdfc8640a012876402c89e7dd22475cda91

SHA512
faee2d00623ab8a0db455a4b26074faed6da189220630f5260c331ed3d7f633f4cb253efaae25101c64ca836bea92b2de9e8c18614da483d4614b2e176d159bb

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