wannacry | 5e1accb4db056135990fb1afc06296e66ea0ce7395599afda6d7468bdf9d2779

General

Target

8f5a868e8958068d3af0674ff3c24289_JaffaCakes118.dll
Size

5.0MB
MD5

8f5a868e8958068d3af0674ff3c24289
SHA1

28562bf6361ae36a4ec4963099cb8fc76a0e7ae2
SHA256

5e1accb4db056135990fb1afc06296e66ea0ce7395599afda6d7468bdf9d2779
SHA512

c83d94f466d44640fddae63ea1b4c7fe3314ebaaf86f8ed91ccd8dd83d5956bb170ec2ae2f9feb622b542d6ed5a29d61d17b52dd71fc0a0ecf8ef4085e3f4c65
SSDEEP

98304:dDqPoBhz1aRxcSUDk36SAEdhvxWa9P593RzPfwo:dDqPe1Cxcxk3ZAEUadzRLfw

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3119) 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

2280 mssecsvc.exe
2572 mssecsvc.exe
2680 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
2280	mssecsvc.exe
2572	mssecsvc.exe
2680	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:

rundll32.exemssecsvc.exe

description ioc process

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

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

Processes:

mssecsvc.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	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\ZoneMap\AutoDetect = "1"	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\Wpad\{39FFD7B2-9DA2-4408-9725-386077F80865}	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\Cookies\CachePrefix = "Cookie:"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f0107000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{39FFD7B2-9DA2-4408-9725-386077F80865}\WpadDecisionTime = c0eac9352db5da01	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\Content\CachePrefix	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{39FFD7B2-9DA2-4408-9725-386077F80865}\WpadDecision = "0"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{39FFD7B2-9DA2-4408-9725-386077F80865}\12-e8-0c-d8-7f-16	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\12-e8-0c-d8-7f-16	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\ProxyEnable = "0"	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 (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\{39FFD7B2-9DA2-4408-9725-386077F80865}\WpadDecisionReason = "1"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{39FFD7B2-9DA2-4408-9725-386077F80865}\WpadNetworkName = "Network 3"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\12-e8-0c-d8-7f-16\WpadDecisionReason = "1"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\12-e8-0c-d8-7f-16\WpadDecisionTime = c0eac9352db5da01	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\12-e8-0c-d8-7f-16\WpadDecision = "0"	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 2860 wrote to memory of 2972	2860	rundll32.exe	rundll32.exe
PID 2860 wrote to memory of 2972	2860	rundll32.exe	rundll32.exe
PID 2860 wrote to memory of 2972	2860	rundll32.exe	rundll32.exe
PID 2860 wrote to memory of 2972	2860	rundll32.exe	rundll32.exe
PID 2860 wrote to memory of 2972	2860	rundll32.exe	rundll32.exe
PID 2860 wrote to memory of 2972	2860	rundll32.exe	rundll32.exe
PID 2860 wrote to memory of 2972	2860	rundll32.exe	rundll32.exe
PID 2972 wrote to memory of 2280	2972	rundll32.exe	mssecsvc.exe
PID 2972 wrote to memory of 2280	2972	rundll32.exe	mssecsvc.exe
PID 2972 wrote to memory of 2280	2972	rundll32.exe	mssecsvc.exe
PID 2972 wrote to memory of 2280	2972	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8f5a868e8958068d3af0674ff3c24289_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2860

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8f5a868e8958068d3af0674ff3c24289_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2972

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2280

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2680

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:2572

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
700719a2b90655e334f915d05c5ec66a

SHA1
8b61fcbe344355c6d964b3046fe4ee70c2c62bc8

SHA256
814c2bc4ddc0dc5c88d352ccdcb29d4296e816c25c6056772d6c90a8af5b7a62

SHA512
ee6353ca81500e1c7965484993389da4a6a1fbd7ede9131664f22c5b04107af46d18db2fd6fb51a5cba017c2f51dae7add0f8b1fb2bd60018b74b0876c913cc1

Download Submit
C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
e77b6f2af12d54a10c978b7f665c11c1

SHA1
2cf4a829a8598234f206d682b12387ef4017a09e

SHA256
edac81687e84c1433f1edcdbfb346a7b7fbb93365f98834fa6fc92821852d3e7

SHA512
81bdf8ea3f116c4921982901161274ff2e476003637fcc8b4fc47e3d29f6482ecd547d383978991ff8ff7474236595241a2dd99b975ace5dd4c8ee8125bf833f

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads