wannacry | 1ed9e1ce8298672b9e7d601cd047b856bdede08bdbae98dc528185eecd70fcad

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 04:05

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General

Target

fdc3991097c258c2fd551ba8c1e7d9ab_JaffaCakes118.dll
Size

5.0MB
MD5

fdc3991097c258c2fd551ba8c1e7d9ab
SHA1

f327e836ca22d83950669d7a95c7a0641710d35a
SHA256

1ed9e1ce8298672b9e7d601cd047b856bdede08bdbae98dc528185eecd70fcad
SHA512

04643fd9a17f43317f397570a6825bb360d1e9538da86b69f721bbcd8268b1a3923e1f2de71a2eb0039022b3c0ddba5d8d73d3cfade9ed6741d4eaa92a56f7d0
SSDEEP

98304:TDqPoBhz1CRxcSUDk36SAEdhvxWa9P593R8yAVp2H:TDqPe1Kxcxk3ZAEUadzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3282) 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
468	mssecsvc.exe
1800	mssecsvc.exe
2220	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	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.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 5084 wrote to memory of 4108	5084	rundll32.exe	82
PID 5084 wrote to memory of 4108	5084	rundll32.exe	82
PID 5084 wrote to memory of 4108	5084	rundll32.exe	82
PID 4108 wrote to memory of 468	4108	rundll32.exe	83
PID 4108 wrote to memory of 468	4108	rundll32.exe	83
PID 4108 wrote to memory of 468	4108	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\fdc3991097c258c2fd551ba8c1e7d9ab_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:5084
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\fdc3991097c258c2fd551ba8c1e7d9ab_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4108
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:468
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2220

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:1800

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
2c6bc97c8085e14d87b1febea01ebead

SHA1
58f48ab2862cfe4a08ad6add831d3a3639493ecb

SHA256
319dcd357a567cdd92c86cfc4b72a26b53f464be896713f32f61117e088bbac1

SHA512
7d7388b41256939e409ad59e877cb3beabf73e7326fd52e6aa384e1acf6f5a04afaa0db0b161bcf241b2c9f0a0ff7eb56778f7b3a9065837319b56c0773c1121

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
3b79c6a2ec98ff1719a4543a5c37c4ce

SHA1
41f7703b7b576ea6179c930ea933443eaf492fa1

SHA256
00ea5e90a29a223340328caf39de2c98b8104079b8cc9c535a996d4dfeccc81f

SHA512
ca61b173b95c6d06aa8484fdac7a9498cff7e44664b94a1067944e7e6199ddba6c0947c211fa9452aed717cef480ac6f15198e87a0498f81dc2a71919b06ae20

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