wannacry | 62e9391e7aada2e5c0ee36f418c78da93bafc6db05fc05ca8a7dce824ced2e62

General

Target

269d6a38de8ff33cb033509ef49dd7d2.dll
Size

5.0MB
MD5

269d6a38de8ff33cb033509ef49dd7d2
SHA1

f5c2049a17b5c3b6d3ba93f06a61ad8ae264fb60
SHA256

62e9391e7aada2e5c0ee36f418c78da93bafc6db05fc05ca8a7dce824ced2e62
SHA512

857270c1bfd4a770b41518275c57cea2f6444b09e63b7bfd557d8ecb8ef29e358078975ef24ede10771ac0510a09146b7fa51a2ef65ce74d51a72ab3787c228c
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhvxWas593R8yAVp2H:+DqPe1Cxcxk3ZAEUaszR8yc4H

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 (3310) 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
2304	mssecsvc.exe
1440	mssecsvc.exe
2848	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	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Modifies data under HKEY_USERS 24 IoCs

description	ioc	Process
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 (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f016e000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{27E472E0-130D-4C47-87DC-2734C99DC3F4}	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\36-d4-57-5c-e3-b0\WpadDecision = "0"	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 = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{27E472E0-130D-4C47-87DC-2734C99DC3F4}\36-d4-57-5c-e3-b0	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\Wpad\{27E472E0-130D-4C47-87DC-2734C99DC3F4}\WpadDecisionTime = a0f545e07767db01	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{27E472E0-130D-4C47-87DC-2734C99DC3F4}\WpadNetworkName = "Network 3"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\36-d4-57-5c-e3-b0	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\36-d4-57-5c-e3-b0\WpadDecisionTime = a0f545e07767db01	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	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\History\CachePrefix = "Visited:"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{27E472E0-130D-4C47-87DC-2734C99DC3F4}\WpadDecisionReason = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{27E472E0-130D-4C47-87DC-2734C99DC3F4}\WpadDecision = "0"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\36-d4-57-5c-e3-b0\WpadDecisionReason = "1"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 3068 wrote to memory of 2196	3068	rundll32.exe	31
PID 3068 wrote to memory of 2196	3068	rundll32.exe	31
PID 3068 wrote to memory of 2196	3068	rundll32.exe	31
PID 3068 wrote to memory of 2196	3068	rundll32.exe	31
PID 3068 wrote to memory of 2196	3068	rundll32.exe	31
PID 3068 wrote to memory of 2196	3068	rundll32.exe	31
PID 3068 wrote to memory of 2196	3068	rundll32.exe	31
PID 2196 wrote to memory of 2304	2196	rundll32.exe	32
PID 2196 wrote to memory of 2304	2196	rundll32.exe	32
PID 2196 wrote to memory of 2304	2196	rundll32.exe	32
PID 2196 wrote to memory of 2304	2196	rundll32.exe	32

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\269d6a38de8ff33cb033509ef49dd7d2.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3068
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\269d6a38de8ff33cb033509ef49dd7d2.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2196
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2304
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2848

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:1440

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
a7def9bf7875f39bf0aa1c76bbe3d4f6

SHA1
1e7502154af9d2817e1849b254e8b2c9207b7b34

SHA256
97f25b04eff5cd567480b67a38a48279f5ccd2256842dd772f5e5e807022282f

SHA512
176f1a203522d763236547f56cdf0e0dfdcf2d8d4ea0b218d15d65b38d9d922d416d34516dd7fb43dfa46b8f41d837836a5bb91e4fbf4a326df5debfcfa5c5de

Download Submit
C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
fcbc058eeab7fd8c9b6fe129eeff2c88

SHA1
101102dfea60d85d5f650d45ef17ab5f02ada179

SHA256
b4c9512ea0d78f7e41fa3b585484d080026a3599e931a4ce4939ea890cf5d411

SHA512
6f1a484d71cf9c1113c5d5e400d02f83b695076954d7e0b70630751a8e04d3672b0ef905baeb3a932f3288c88bdd425b5ed8679608e97e30b20ed6ca27820834

Download Submit

Analysis

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