wannacry | c9e6f90c75bd7ad50d2a8ffd3c60a0a7f0d9005b4daeb1c1fb8991f4dac614b7

General

Target

c9e6f90c75bd7ad50d2a8ffd3c60a0a7f0d9005b4daeb1c1fb8991f4dac614b7.dll
Size

5.0MB
MD5

e2f6cd5e295645e69b6f1e5e0fc56964
SHA1

2ca110489fd022d3312df57ee8560eb1330d2f9c
SHA256

c9e6f90c75bd7ad50d2a8ffd3c60a0a7f0d9005b4daeb1c1fb8991f4dac614b7
SHA512

3b71f2b8e9b1a8ad60e13955abd8bfd0ca7e1cb6a41adf859fc68d65cc0c3e39c88dfb101302c6980e0fa381c0aff45a7a234884c66d6ee82687a48083cda166
SSDEEP

49152:SnAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdh:+DqPoBhz1aRxcSUDk36SAEdh

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3308) 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
2288	mssecsvc.exe
2868	mssecsvc.exe
2860	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\tasksche.exe	mssecsvc.exe
File created	C:\WINDOWS\mssecsvc.exe	rundll32.exe

Modifies data under HKEY_USERS 24 IoCs

description	ioc	Process
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f0090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	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
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{A25466CA-BF17-475A-B3CD-B1562D5BAF60}	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{A25466CA-BF17-475A-B3CD-B1562D5BAF60}\WpadDecisionTime = 2020ba6999dada01	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{A25466CA-BF17-475A-B3CD-B1562D5BAF60}\WpadNetworkName = "Network 3"	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 (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
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{A25466CA-BF17-475A-B3CD-B1562D5BAF60}\WpadDecisionReason = "1"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\8e-31-6d-f9-a3-60	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{A25466CA-BF17-475A-B3CD-B1562D5BAF60}\8e-31-6d-f9-a3-60	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\8e-31-6d-f9-a3-60\WpadDecisionReason = "1"	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\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\8e-31-6d-f9-a3-60\WpadDecisionTime = 2020ba6999dada01	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{A25466CA-BF17-475A-B3CD-B1562D5BAF60}\WpadDecision = "0"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\8e-31-6d-f9-a3-60\WpadDecision = "0"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	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

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2480 wrote to memory of 3044	2480	rundll32.exe	30
PID 2480 wrote to memory of 3044	2480	rundll32.exe	30
PID 2480 wrote to memory of 3044	2480	rundll32.exe	30
PID 2480 wrote to memory of 3044	2480	rundll32.exe	30
PID 2480 wrote to memory of 3044	2480	rundll32.exe	30
PID 2480 wrote to memory of 3044	2480	rundll32.exe	30
PID 2480 wrote to memory of 3044	2480	rundll32.exe	30
PID 3044 wrote to memory of 2288	3044	rundll32.exe	31
PID 3044 wrote to memory of 2288	3044	rundll32.exe	31
PID 3044 wrote to memory of 2288	3044	rundll32.exe	31
PID 3044 wrote to memory of 2288	3044	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c9e6f90c75bd7ad50d2a8ffd3c60a0a7f0d9005b4daeb1c1fb8991f4dac614b7.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2480
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c9e6f90c75bd7ad50d2a8ffd3c60a0a7f0d9005b4daeb1c1fb8991f4dac614b7.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:3044
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:2288
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2860

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:2868

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
0cd8635d3cf091c6778373e4883a7acf

SHA1
dbc02a965e5ceb512d1ca5240cb974756b55dd0f

SHA256
92ae1eb9c83b64d781a69edee4a270a2ab7c7ad642282aa13ed4466ca9c2278a

SHA512
5bf40b5f632517a58e9529556cfc035290f2b1b6eeb0901584307388612cfcad708d1b61b972f31dca09f30818820bdc0746a6c44c510aba0feb71251833e0db

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
0c50237e95985d1b5fc293ffbfdb1e31

SHA1
c4c5c1007dfd61382e1030b3c5dc8623440ff8f3

SHA256
47870a5ebf14d5ba8bd9a0b189e8245963c04cb0dc7e4b2cb294075434af6af4

SHA512
16bf5cb4f04feb328a1d5ae3e87648d7301ec5edecfe7512b054e1ebd237883c93f8952b10aacdf09c8881bf45898617895cb0abad11796a45b0ffea257119d4

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Analysis

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