wannacry | c8e1f103e2313c54a080542f8a88e0f06204654ff99963add4ecb95e726c0564

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
27-09-2024 16:38

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General

Target

fac31665f283cd03275732939e3fbc58_JaffaCakes118.dll
Size

5.0MB
MD5

fac31665f283cd03275732939e3fbc58
SHA1

5812c2bfcf8d92293396e47ed5e250d57878d7e2
SHA256

c8e1f103e2313c54a080542f8a88e0f06204654ff99963add4ecb95e726c0564
SHA512

65ae586ccc9a824be82463569118cfe4dee0e324f6ba94ac4fc368abe694ca39af0d89974a89a29c780c50048998b1ea8e504355ec51fc006aa705d6f2ac0751
SSDEEP

24576:SbLgddQhfdmMSirYbcMNgef0QeQjG/D8kIqRYoAdNLKz6626M+vbOSSqTPV0:SnAQqMSPbcBVQej/1INRx+TSqTd0

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3342) 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
4972	mssecsvc.exe
4564	mssecsvc.exe
2704	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 5116 wrote to memory of 3980	5116	rundll32.exe	82
PID 5116 wrote to memory of 3980	5116	rundll32.exe	82
PID 5116 wrote to memory of 3980	5116	rundll32.exe	82
PID 3980 wrote to memory of 4972	3980	rundll32.exe	83
PID 3980 wrote to memory of 4972	3980	rundll32.exe	83
PID 3980 wrote to memory of 4972	3980	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\fac31665f283cd03275732939e3fbc58_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:5116
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\fac31665f283cd03275732939e3fbc58_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3980
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:4972
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2704

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:4564

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
6f5cf0fd18d2d90d6491bad093acde66

SHA1
5f7608d88bf0a1a4caa3da7f9923676c36b0892e

SHA256
2ec11092c246683c17777011a5a51a762d7d1ec654606471f92d4f7021b6c052

SHA512
05c1b149d73b1ea086df5bf7c9e93ccc49787a182b14619360620d7434ec19b499e800f2ba0ae88a3e8c9b25165b446c2bd401b3f48ffceeb3dd91449e80996b

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
75e78aeb2ec468c9b0e3e5e83d22fb4b

SHA1
29d04a0c7ffcdec17f008d0594126014504e0d90

SHA256
b4cae3760d43f4aba45c7b49652662d304d942642189801209434cc551ad488d

SHA512
6c29195016e5456e3d245f55000b8c5918ba7348687ffc45f50e089d1c118f26ee0586b8cbaa072345b8244c52b90c8e904c3d2caf8822d8667a8fea265d66e5

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