wannacry | 70cafeb5236e1506ec9f27304f570b7e389082bdc18cf1a4431bf8ecc085c8fc

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
18-08-2024 17:50

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General

Target

a79fc2e13f0f2d2f66d1de93468234c7_JaffaCakes118.dll
Size

5.0MB
MD5

a79fc2e13f0f2d2f66d1de93468234c7
SHA1

77948929d4d77c348ea3c64a8622261e5c16fc6e
SHA256

70cafeb5236e1506ec9f27304f570b7e389082bdc18cf1a4431bf8ecc085c8fc
SHA512

9f3a91a39370750bd37ff1b245959737f60e37005bc6e9153a10e27bc8b0c2741c18deb2793a38b16ccc87be9f1e411829416ecdf34ddd273bd783bf2cb0d819
SSDEEP

49152:znAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvxJM0H9PAMEc:TDqPoBhz1aRxcSUDk36SAEdhvxWa9P5

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3360) 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
3256	mssecsvc.exe
2424	mssecsvc.exe
2072	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 5088 wrote to memory of 3152	5088	rundll32.exe	84
PID 5088 wrote to memory of 3152	5088	rundll32.exe	84
PID 5088 wrote to memory of 3152	5088	rundll32.exe	84
PID 3152 wrote to memory of 3256	3152	rundll32.exe	85
PID 3152 wrote to memory of 3256	3152	rundll32.exe	85
PID 3152 wrote to memory of 3256	3152	rundll32.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a79fc2e13f0f2d2f66d1de93468234c7_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:5088
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\a79fc2e13f0f2d2f66d1de93468234c7_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3152
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:3256
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2072

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:2424

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
55cef273d64f4c6f4cbc395168e81d28

SHA1
fb9ad8722132464679849ed0220436222ca8cce2

SHA256
2b1f2b1689a3a8673f38838f33eef7f34d2d907308d8a95f0dc23774af741efb

SHA512
4cffd515fad07450e5dc51beac6b1effa767fe5ea5b70a831409219e5ad9dfa26edb24e2fd39844ed0a3e2116cbb03ae01d453c2daa9767cf598824e588706c1

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
1099297f0d201628ba882f6d00dae1ec

SHA1
15145157e09a5177f4c187188bde63ebd17e3ea8

SHA256
0e352efb5aaf48a23dd9ef3a21c667fbb77c58735af05a5b011af1647c12475f

SHA512
13b68037a9d3bd1cd09dac2833acc6def05b894d8ebfc5dbba02e88ab9d0ca080a69d923d37ac725b1e80aae745b804ae2535f978ed4a7c69e50ba2c9331cde7

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