wannacry | 7ba27a3798266879022a95e42806c446dbc21d49b2941512a522b5829b156d9b

General

Target

42ebdafd10a4777baee4be99203b7acf_JaffaCakes118.dll
Size

5.0MB
MD5

42ebdafd10a4777baee4be99203b7acf
SHA1

b871c16c3570f1779c18cd13dd121cadc9164f4f
SHA256

7ba27a3798266879022a95e42806c446dbc21d49b2941512a522b5829b156d9b
SHA512

72fe098c2912861bab8cfc243d18b4beebf842a6e3ad36f3ef5eea4bbb55b287d8e5e2d1ad3304ed85da80186d2d13bff104f078ef3752683a412ed087d039b4
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhu3R8yAVp2H:+DqPe1Cxcxk3ZAEMR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3160) 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
2292	mssecsvc.exe
2324	mssecsvc.exe
2868	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

Modifies data under HKEY_USERS 24 IoCs

description	ioc	Process
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f008c000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{CF0BD60E-B27B-44C3-9A9C-D62E829F52A5}\WpadDecisionReason = "1"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{CF0BD60E-B27B-44C3-9A9C-D62E829F52A5}\WpadNetworkName = "Network 2"	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
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\3e-be-35-c3-05-ad	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\3e-be-35-c3-05-ad\WpadDecisionReason = "1"	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
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\3e-be-35-c3-05-ad\WpadDecisionTime = 008e27533da6da01	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\3e-be-35-c3-05-ad\WpadDecision = "0"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{CF0BD60E-B27B-44C3-9A9C-D62E829F52A5}\3e-be-35-c3-05-ad	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	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{CF0BD60E-B27B-44C3-9A9C-D62E829F52A5}	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{CF0BD60E-B27B-44C3-9A9C-D62E829F52A5}\WpadDecisionTime = 008e27533da6da01	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{CF0BD60E-B27B-44C3-9A9C-D62E829F52A5}\WpadDecision = "0"	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2348 wrote to memory of 2100	2348	rundll32.exe	28
PID 2348 wrote to memory of 2100	2348	rundll32.exe	28
PID 2348 wrote to memory of 2100	2348	rundll32.exe	28
PID 2348 wrote to memory of 2100	2348	rundll32.exe	28
PID 2348 wrote to memory of 2100	2348	rundll32.exe	28
PID 2348 wrote to memory of 2100	2348	rundll32.exe	28
PID 2348 wrote to memory of 2100	2348	rundll32.exe	28
PID 2100 wrote to memory of 2292	2100	rundll32.exe	29
PID 2100 wrote to memory of 2292	2100	rundll32.exe	29
PID 2100 wrote to memory of 2292	2100	rundll32.exe	29
PID 2100 wrote to memory of 2292	2100	rundll32.exe	29

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\42ebdafd10a4777baee4be99203b7acf_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2348
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\42ebdafd10a4777baee4be99203b7acf_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:2100
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:2292
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2868

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:2324

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
16532c6523e6da4a112da6c20ecc320a

SHA1
b3beb7b15522fb59baac7f6049ddfd4adcaad187

SHA256
0ed0b4f5c421df3713abb641193c59ee7f201170a9740603619ebf83b4327712

SHA512
cc242d14689810387c9be6a4c5b7ff9e99963a7e749cd0958d8beb2fcbd86213ac56a323e16ccf4842208d14d0483f999b713f47644a506652713ef7d4b49ede

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
2751ecad26044a0060392188ccb52dfc

SHA1
394eff867149863b6218c30324b5059733113954

SHA256
8c626db5c9a1c5e2cb84776ebb8220c83a3f0b14aab729dbea3b85eafcefaf7e

SHA512
7268d0be42f2bd2ea92c6ad4bcda75c930c1da4394dc6709c525863ba8562d77a8e2e0f26b8869b819f926761645eed4ec355037ac15624a3929d05c2ecc9f77

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Analysis

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