wannacry | 25aef98f31689403efd787a1bc80edd87805a03bd2f61d86fb4dc823aa381450

General

Target

a507fbb517751736c6dcf41c967d2a56_JaffaCakes118.dll
Size

5.0MB
MD5

a507fbb517751736c6dcf41c967d2a56
SHA1

39b95e8e1ef0d46b3bc853fa374f7429c3c4d10f
SHA256

25aef98f31689403efd787a1bc80edd87805a03bd2f61d86fb4dc823aa381450
SHA512

2c9cafc5af10e0feb286bad250fe24af2fb8c137508496b69fc93bd8e3a94151083faf61e16489f6e41c10671d5c32182b1b943c3b5434e134b68c9461da346f
SSDEEP

24576:SbLgddQhfdmMSirYbcMNgef0Y8uME7A4kqAH1pNZtA0p+9XEk:SnAQqMSPbcBVKR8yAH1plAH

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3087) 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

2372 mssecsvc.exe
1628 mssecsvc.exe
2644 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
2372	mssecsvc.exe
1628	mssecsvc.exe
2644	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
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{F21B9D3B-8A8B-4196-A1B1-E026110F0404}\WpadDecision = "0"	mssecsvc.exe
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
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 (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f0050000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{F21B9D3B-8A8B-4196-A1B1-E026110F0404}\WpadDecisionReason = "1"	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 (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 (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{F21B9D3B-8A8B-4196-A1B1-E026110F0404}\WpadDecisionTime = 2090a49b7abdda01	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{F21B9D3B-8A8B-4196-A1B1-E026110F0404}\WpadNetworkName = "Network 3"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\aa-dd-db-e5-c9-83	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{F21B9D3B-8A8B-4196-A1B1-E026110F0404}\aa-dd-db-e5-c9-83	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\aa-dd-db-e5-c9-83\WpadDecision = "0"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\aa-dd-db-e5-c9-83\WpadDecisionReason = "1"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\aa-dd-db-e5-c9-83\WpadDecisionTime = 2090a49b7abdda01	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
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\AutoDetect = "1"	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\{F21B9D3B-8A8B-4196-A1B1-E026110F0404}	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 2860 wrote to memory of 2964	2860	rundll32.exe	rundll32.exe
PID 2860 wrote to memory of 2964	2860	rundll32.exe	rundll32.exe
PID 2860 wrote to memory of 2964	2860	rundll32.exe	rundll32.exe
PID 2860 wrote to memory of 2964	2860	rundll32.exe	rundll32.exe
PID 2860 wrote to memory of 2964	2860	rundll32.exe	rundll32.exe
PID 2860 wrote to memory of 2964	2860	rundll32.exe	rundll32.exe
PID 2860 wrote to memory of 2964	2860	rundll32.exe	rundll32.exe
PID 2964 wrote to memory of 2372	2964	rundll32.exe	mssecsvc.exe
PID 2964 wrote to memory of 2372	2964	rundll32.exe	mssecsvc.exe
PID 2964 wrote to memory of 2372	2964	rundll32.exe	mssecsvc.exe
PID 2964 wrote to memory of 2372	2964	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a507fbb517751736c6dcf41c967d2a56_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2860

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a507fbb517751736c6dcf41c967d2a56_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2964

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2372

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2644

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:1628

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
b8cffb216ac70b443fcd5e3d4da9866d

SHA1
c08c4a8d93b7e6fdb6c85c06c9685cdb90d89956

SHA256
7dd5323526062ec448c89fe44212787659e3b2bae7ab37fb20bf0517da7f8fc9

SHA512
354b5695c8b3e60d0278bd9c1b6a58ccbc27b8590904af246c8c6b8dc57e2e855d9710c0f60762f9a1c1e3255090c1eaa6fc9f35e3e50cfc47df0f421d2ac171

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
f6ce03eb98bf554d3d34e82abcaf6dbc

SHA1
4342a29eb2b604ec980a1742436849b4df70d485

SHA256
0f1cf1e0af34939c8d818e315ab77b708d29992ea1e1f0f4d27ab70dcc5d3e35

SHA512
a1a91c1cd3386c1275d0658982de43cfcbb47dd6a514746285c54ecc01dadc2951b7e7915397ead8099bd3ad3fc8c301945f3efd44faab28860e4892f582ab04

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads