wannacry | f35f11348cc5d4c75f72e0adec6c2e64ebf3d740843b35224e7defe16b8376c9

General

Target

f35f11348cc5d4c75f72e0adec6c2e64ebf3d740843b35224e7defe16b8376c9N.dll
Size

5.0MB
MD5

f6608caf38c3fc36fca7f7493b5d2540
SHA1

3dc682a31fdc8df2b9726b191d2890affd2c73b2
SHA256

f35f11348cc5d4c75f72e0adec6c2e64ebf3d740843b35224e7defe16b8376c9
SHA512

602c75985e765b3a3045063bd9f9b63c85cebbaed0cac5af25616688b0a5352e5d6c1b7afb767a3d316c8a14a7abbfabf1f375e03e41919fbdec6dff07c80740
SSDEEP

49152:SnAQqMSPbcBVQej/VnvxJM0H9PAMEcaEau3R8yAH1plAH:+DqPoBhzVvxWa9P593R8yAVp2H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3195) 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
2236	mssecsvc.exe
2180	mssecsvc.exe
2824	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\UNCAsIntranet = "0"	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	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
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
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\{579454EC-2469-413F-A4BA-4A9F19D63ABB}\WpadDecision = "0"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\5e-fd-e8-c0-db-13\WpadDecisionTime = b0d4ceab5d16db01	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	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\{579454EC-2469-413F-A4BA-4A9F19D63ABB}\WpadDecisionReason = "1"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{579454EC-2469-413F-A4BA-4A9F19D63ABB}\WpadNetworkName = "Network 3"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\5e-fd-e8-c0-db-13	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{579454EC-2469-413F-A4BA-4A9F19D63ABB}\5e-fd-e8-c0-db-13	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
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\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00ca000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{579454EC-2469-413F-A4BA-4A9F19D63ABB}	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\5e-fd-e8-c0-db-13\WpadDecision = "0"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{579454EC-2469-413F-A4BA-4A9F19D63ABB}\WpadDecisionTime = b0d4ceab5d16db01	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\5e-fd-e8-c0-db-13\WpadDecisionReason = "1"	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2980 wrote to memory of 2424	2980	rundll32.exe	29
PID 2980 wrote to memory of 2424	2980	rundll32.exe	29
PID 2980 wrote to memory of 2424	2980	rundll32.exe	29
PID 2980 wrote to memory of 2424	2980	rundll32.exe	29
PID 2980 wrote to memory of 2424	2980	rundll32.exe	29
PID 2980 wrote to memory of 2424	2980	rundll32.exe	29
PID 2980 wrote to memory of 2424	2980	rundll32.exe	29
PID 2424 wrote to memory of 2236	2424	rundll32.exe	30
PID 2424 wrote to memory of 2236	2424	rundll32.exe	30
PID 2424 wrote to memory of 2236	2424	rundll32.exe	30
PID 2424 wrote to memory of 2236	2424	rundll32.exe	30

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\f35f11348cc5d4c75f72e0adec6c2e64ebf3d740843b35224e7defe16b8376c9N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2980
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\f35f11348cc5d4c75f72e0adec6c2e64ebf3d740843b35224e7defe16b8376c9N.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2424
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2236
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2824

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:2180

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
c9bb3a38d441f6db5a0ba29c6a8d0f94

SHA1
2a5798d4ad64b7517bdad0151785c3e7ba747f80

SHA256
5d6b9b19ff9bb25c3c9eb61528eeb3fb166854d2f97d29f21c1b505797213835

SHA512
7973a4df0a0a86fb13f1f08669bef25ff1cfba92ba86007da9500023f8137b700493285e51c26e7b044a58b873023ba4b862179700cd2833e0ffa36db08e13e6

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
2d9ddedb5d80a205fb7a58406f2f5dd5

SHA1
00ae9741e86020e55e6c28002272632769c9168c

SHA256
89d3cdebb7b9c045bd6e6a5c107f35073bda465ef32cfb6d164319da4de8736c

SHA512
0d6001a2696634da038985935151798389c807c4ea5368fa09b92f8dec80ad841dbff919c4ad95c62a43c0b3eda220705a73fb7af5862c416be25e2883cb2648

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Analysis

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