wannacry | 4940cd65dbf580e56633d052179bd0a9df2c5e41781c66db3ff197b80c8d0edf

General

Target

8f82f0fee6f8bac750ca3685435877af_JaffaCakes118.dll
Size

5.0MB
MD5

8f82f0fee6f8bac750ca3685435877af
SHA1

4b96c086e8af1de4d12dec649c7a1e1d9c37c496
SHA256

4940cd65dbf580e56633d052179bd0a9df2c5e41781c66db3ff197b80c8d0edf
SHA512

9a489d18033aef4dbf40f4f2d2fca80672896869068c62d4acbe7ffb32ade4d960d5408c47be2160099edde639b00f2cc56b7a0a7dfbae184505a12679dc3cd3
SSDEEP

49152:SnAQqMSPbcBVsZ6SAARdhnvxJM0H9PAMEcEEau3R8yAH1plAH:+DqPoB+6SAEdhvxWa9P5n3R8yAVp2H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3269) 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

Processes:

mssecsvc.exemssecsvc.exetasksche.exe

pid process

3040 mssecsvc.exe
2872 mssecsvc.exe
2632 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

pid	process
3040	mssecsvc.exe
2872	mssecsvc.exe
2632	tasksche.exe

Drops file in System32 directory 1 IoCs

Processes:

mssecsvc.exe

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

Processes:

mssecsvc.exerundll32.exe

description ioc process

File created C:\WINDOWS\tasksche.exe mssecsvc.exe
File created C:\WINDOWS\mssecsvc.exe rundll32.exe

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

Processes:

mssecsvc.exe

description	ioc	process
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\History\CachePrefix = "Visited:"	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\Wpad\{6E343C87-8161-4602-BBC6-EBE34AE9FD68}	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{6E343C87-8161-4602-BBC6-EBE34AE9FD68}\WpadDecisionReason = "1"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{6E343C87-8161-4602-BBC6-EBE34AE9FD68}\52-eb-ea-02-0c-24	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
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\{6E343C87-8161-4602-BBC6-EBE34AE9FD68}\WpadDecision = "0"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\52-eb-ea-02-0c-24	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\ZoneMap\UNCAsIntranet = "0"	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 = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00df000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{6E343C87-8161-4602-BBC6-EBE34AE9FD68}\WpadDecisionTime = 407a80db34b5da01	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{6E343C87-8161-4602-BBC6-EBE34AE9FD68}\WpadNetworkName = "Network 3"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\52-eb-ea-02-0c-24\WpadDecisionReason = "1"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\52-eb-ea-02-0c-24\WpadDecisionTime = 407a80db34b5da01	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	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\52-eb-ea-02-0c-24\WpadDecision = "0"	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 2844 wrote to memory of 3016	2844	rundll32.exe	rundll32.exe
PID 2844 wrote to memory of 3016	2844	rundll32.exe	rundll32.exe
PID 2844 wrote to memory of 3016	2844	rundll32.exe	rundll32.exe
PID 2844 wrote to memory of 3016	2844	rundll32.exe	rundll32.exe
PID 2844 wrote to memory of 3016	2844	rundll32.exe	rundll32.exe
PID 2844 wrote to memory of 3016	2844	rundll32.exe	rundll32.exe
PID 2844 wrote to memory of 3016	2844	rundll32.exe	rundll32.exe
PID 3016 wrote to memory of 3040	3016	rundll32.exe	mssecsvc.exe
PID 3016 wrote to memory of 3040	3016	rundll32.exe	mssecsvc.exe
PID 3016 wrote to memory of 3040	3016	rundll32.exe	mssecsvc.exe
PID 3016 wrote to memory of 3040	3016	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8f82f0fee6f8bac750ca3685435877af_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2844

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8f82f0fee6f8bac750ca3685435877af_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:3016

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:3040

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2632

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:2872

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
f24df863ff0aec51e50bef1631aad91e

SHA1
29e4df8894fbca22d91c4a926b4b066cf788b66b

SHA256
75d35a6428a073f9d06193777df4998a73a6fc5fd1d3772027083f02a9a8ca96

SHA512
20991c55a0b5d2903ec686db641d9d4b8bc50fbd910b5b79e513aa34611a607b458092cf14e11d48d489f55b9164b1dad1483d34699a3e93558a6293f8f37821

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
27d35936d5402c27bc7f0ba2bd2647e3

SHA1
e4145a3d5d04f0ed4bb9b3ee1d52185ba8b2c298

SHA256
bb82a7c495994ff70cd7d067c7d396e39cb18f79b45ddc00815318ca04967170

SHA512
96504f4112822e30ea56488fdbf9c33914a1ac086851eb41e70a5f75dfc37e207cfa20efabaf7bc5d7f8e49d0f03f3e5338fb4fd544bf3e448006999326d2316

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads