wannacry | 8024dda348948dfe26f67cbe23f7bc79e1751a1f4554d8423c6d460aa4410da6

General

Target

1a5fc733c6037f134c987dc3bed22a2d.dll
Size

5.0MB
MD5

1a5fc733c6037f134c987dc3bed22a2d
SHA1

8de8d8c7a24cfc324f5ee994344ac42ca6935fd6
SHA256

8024dda348948dfe26f67cbe23f7bc79e1751a1f4554d8423c6d460aa4410da6
SHA512

34e2f07dfcb450d2c2fb4775089414844630a98789801bff3e982f14b82783ab68cbc728627016045b437e75aa6f00d69c5dfb48316d89e80e89d05ab2a97a5b
SSDEEP

49152:gnQQqMSPbcBVQejIkQo6SArf0XdX63DE4JUJn0EF9a4AhAU+LGI7QOZ4HDX:gzqPoBhUk36SAQx6Wf9AZHz

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Wannacry family
wannacry
Contacts a large (633) 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

Processes:

mssecsvc.exemssecsvc.exetasksche.exe

pid process

2216 mssecsvc.exe
3028 mssecsvc.exe
2764 tasksche.exe

pid	process
2216	mssecsvc.exe
3028	mssecsvc.exe
2764	tasksche.exe

Drops file in System32 directory 1 IoCs

Processes:

mssecsvc.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\counters.dat	mssecsvc.exe

Drops file in Windows directory 2 IoCs

Processes:

rundll32.exemssecsvc.exe

description ioc process

File created C:\WINDOWS\mssecsvc.exe rundll32.exe
File created C:\WINDOWS\tasksche.exe mssecsvc.exe

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

Processes:

mssecsvc.exerundll32.exemssecsvc.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe

Modifies data under HKEY_USERS 21 IoCs

Processes:

mssecsvc.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\4a-b7-f4-6e-a0-dc	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\4a-b7-f4-6e-a0-dc\WpadDecisionReason = "1"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f007f000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{C1F645C0-ADDC-470E-82A3-D6017383E5F8}\WpadDecision = "0"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{C1F645C0-ADDC-470E-82A3-D6017383E5F8}\WpadNetworkName = "Network 3"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\4a-b7-f4-6e-a0-dc\WpadDecisionTime = 803a610dc336db01	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\4a-b7-f4-6e-a0-dc\WpadDecision = "0"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{C1F645C0-ADDC-470E-82A3-D6017383E5F8}\WpadDecisionReason = "1"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{C1F645C0-ADDC-470E-82A3-D6017383E5F8}\4a-b7-f4-6e-a0-dc	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\UNCAsIntranet = "0"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{C1F645C0-ADDC-470E-82A3-D6017383E5F8}\WpadDecisionTime = 803a610dc336db01	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{C1F645C0-ADDC-470E-82A3-D6017383E5F8}	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 2220 wrote to memory of 2296	2220	rundll32.exe	rundll32.exe
PID 2220 wrote to memory of 2296	2220	rundll32.exe	rundll32.exe
PID 2220 wrote to memory of 2296	2220	rundll32.exe	rundll32.exe
PID 2220 wrote to memory of 2296	2220	rundll32.exe	rundll32.exe
PID 2220 wrote to memory of 2296	2220	rundll32.exe	rundll32.exe
PID 2220 wrote to memory of 2296	2220	rundll32.exe	rundll32.exe
PID 2220 wrote to memory of 2296	2220	rundll32.exe	rundll32.exe
PID 2296 wrote to memory of 2216	2296	rundll32.exe	mssecsvc.exe
PID 2296 wrote to memory of 2216	2296	rundll32.exe	mssecsvc.exe
PID 2296 wrote to memory of 2216	2296	rundll32.exe	mssecsvc.exe
PID 2296 wrote to memory of 2216	2296	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\1a5fc733c6037f134c987dc3bed22a2d.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2220
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\1a5fc733c6037f134c987dc3bed22a2d.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2296
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2216
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2764

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:3028

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

1

T1046

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
28c28fdfbd809c7e998edcd21153b036

SHA1
5837970ba3f70902b568d55d8afae3be7cacda3a

SHA256
ab9d3b6020dc0dce1ab8d53df408735e8986b157a2f18c77eb6dfae5532796b5

SHA512
5552fd1d64a479511218e91ca3ba7ba61bbdf8a15ce567f15d9d360856c5fd4be5153df80168a67750bdb1145cae3200c5a27c549f92bf2a01d2cd9d0998e879

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
8b60350eab8a35781636a66ebe58b89f

SHA1
8f71a2bfe1aa8d56bf243979e81219aa4f0d9d7e

SHA256
1b9adb13a91b524be9c4cb283c61988c66cfba8418c97c81be5aa077bdc7c026

SHA512
58ea8a4a6aa88d3f72663f3877f0af55e6d5758e6b337c899c8f26208f0c45b637e4a14c7ae5bf9ac42152b728e28d1fe99038ce925536f04dd07b29c7ef07bc

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads