wannacry | 0e665ab2b0a1d700e9cc2c94022e9fb9ed7eb9ec8210c057bf938bc62eb95467

General

Target

50b93e08b91de26b5487abe79afe1d4a.dll
Size

5.0MB
MD5

50b93e08b91de26b5487abe79afe1d4a
SHA1

883462757d74dfbb08b94dd66159d9852e6c2ee9
SHA256

0e665ab2b0a1d700e9cc2c94022e9fb9ed7eb9ec8210c057bf938bc62eb95467
SHA512

a5ba259031ea89c4f52669516052a821e95a64884baf047b02f8aeab0ac97258447d057c4039cea6b15ba4ee1d3f33fb4afd02d39d203ecb8b1c3ef5575ed325
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P593R8yAVp2H:+DqPe1Cxcxk3ZAEUadzR8yc4H

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 (3256) 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
1524	mssecsvc.exe
572	mssecsvc.exe
2748	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 System32 directory 1 IoCs

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

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

Modifies data under HKEY_USERS 24 IoCs

description	ioc	Process
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{1FC23475-B648-428F-8A0F-1B7FECD9C553}\WpadDecisionTime = d0d948a6f066db01	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{1FC23475-B648-428F-8A0F-1B7FECD9C553}\WpadNetworkName = "Network 3"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{1FC23475-B648-428F-8A0F-1B7FECD9C553}\06-79-44-18-ed-8c	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\06-79-44-18-ed-8c\WpadDecisionTime = d0d948a6f066db01	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	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\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	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\Wpad\06-79-44-18-ed-8c\WpadDecisionReason = "1"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00b7000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{1FC23475-B648-428F-8A0F-1B7FECD9C553}\WpadDecisionReason = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\06-79-44-18-ed-8c\WpadDecision = "0"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{1FC23475-B648-428F-8A0F-1B7FECD9C553}\WpadDecision = "0"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\06-79-44-18-ed-8c	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{1FC23475-B648-428F-8A0F-1B7FECD9C553}	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\ZoneMap\UNCAsIntranet = "0"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2492 wrote to memory of 1192	2492	rundll32.exe	31
PID 2492 wrote to memory of 1192	2492	rundll32.exe	31
PID 2492 wrote to memory of 1192	2492	rundll32.exe	31
PID 2492 wrote to memory of 1192	2492	rundll32.exe	31
PID 2492 wrote to memory of 1192	2492	rundll32.exe	31
PID 2492 wrote to memory of 1192	2492	rundll32.exe	31
PID 2492 wrote to memory of 1192	2492	rundll32.exe	31
PID 1192 wrote to memory of 1524	1192	rundll32.exe	32
PID 1192 wrote to memory of 1524	1192	rundll32.exe	32
PID 1192 wrote to memory of 1524	1192	rundll32.exe	32
PID 1192 wrote to memory of 1524	1192	rundll32.exe	32

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\50b93e08b91de26b5487abe79afe1d4a.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2492
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\50b93e08b91de26b5487abe79afe1d4a.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1192
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:1524
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2748

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:572

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

2

T1046

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
41b5ba4bf74e65845fa8c9861ca34508

SHA1
427934d7fa2467bab1abfa5959c8cf6d0ae00ea7

SHA256
95ab184ecc89b9a593c024963650f54fe0a597c3f75d75ff3bf4f33f648c6d13

SHA512
ef55010669b1098df68c511d6863082abcc2ed4af78d933a1fb8dad347893eebc44ade3e41b3fe296a11dd3cf026bdb0d8359dd759569df5d7b37f9294921a48

Download Submit
C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
c906087fbfe90924bc4f903e527e52e8

SHA1
0ce9bd4724cae1edc5141e6c8074ad5fcaf9fc6a

SHA256
802d815d1cd9e4193cf586124622bde16ecb5d7127a1c0aa9a13d1e3e46f564a

SHA512
c479f547bf5e79cfab2985173f200583047e7f47ac565b248ccae802d2e4633cb410a7c502d4923fa6f34d6ca9bd77f898d3ef001a1a42c8939aff861a35457b

Download Submit

Analysis

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