wannacry | 27f6f8bc00bde8c8c6b5692388bf4458131a940814a1a903065bfdc2cfed0fde

General

Target

2fe52d89a67c9906720d04670dcfbaee_JaffaCakes118.dll
Size

5.0MB
MD5

2fe52d89a67c9906720d04670dcfbaee
SHA1

0b661cade27f643d76c471db33729a8b795639da
SHA256

27f6f8bc00bde8c8c6b5692388bf4458131a940814a1a903065bfdc2cfed0fde
SHA512

f719bec24ddc570b30a529746dc3c68d6d81604efa9e0583b35c77cfe3d60824f3390cd8bbdaa9294c0f8781d2eff79ed7ac5ac1643c42459afb03a3374a6fd8
SSDEEP

98304:+DqPoBQ1aRxcSUDk36SAEdhvxWa9P593R8yA:+DqPn1Cxcxk3ZAEUadzR8y

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3337) 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

2268 mssecsvc.exe
2528 mssecsvc.exe
2808 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
2268	mssecsvc.exe
2528	mssecsvc.exe
2808	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 (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\72-7c-29-fd-05-5d\WpadDecision = "0"	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 (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{6EBA8636-7EDA-43B6-A584-1E3C48F63A5D}\WpadDecisionTime = 902f29a0f2a2da01	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{6EBA8636-7EDA-43B6-A584-1E3C48F63A5D}\WpadDecision = "0"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{6EBA8636-7EDA-43B6-A584-1E3C48F63A5D}\WpadNetworkName = "Network 3"	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
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{6EBA8636-7EDA-43B6-A584-1E3C48F63A5D}	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{6EBA8636-7EDA-43B6-A584-1E3C48F63A5D}\WpadDecisionReason = "1"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{6EBA8636-7EDA-43B6-A584-1E3C48F63A5D}\72-7c-29-fd-05-5d	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\72-7c-29-fd-05-5d\WpadDecisionTime = 902f29a0f2a2da01	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\72-7c-29-fd-05-5d\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
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 (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f013d000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\72-7c-29-fd-05-5d	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 2872 wrote to memory of 2924	2872	rundll32.exe	rundll32.exe
PID 2872 wrote to memory of 2924	2872	rundll32.exe	rundll32.exe
PID 2872 wrote to memory of 2924	2872	rundll32.exe	rundll32.exe
PID 2872 wrote to memory of 2924	2872	rundll32.exe	rundll32.exe
PID 2872 wrote to memory of 2924	2872	rundll32.exe	rundll32.exe
PID 2872 wrote to memory of 2924	2872	rundll32.exe	rundll32.exe
PID 2872 wrote to memory of 2924	2872	rundll32.exe	rundll32.exe
PID 2924 wrote to memory of 2268	2924	rundll32.exe	mssecsvc.exe
PID 2924 wrote to memory of 2268	2924	rundll32.exe	mssecsvc.exe
PID 2924 wrote to memory of 2268	2924	rundll32.exe	mssecsvc.exe
PID 2924 wrote to memory of 2268	2924	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\2fe52d89a67c9906720d04670dcfbaee_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2872

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\2fe52d89a67c9906720d04670dcfbaee_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2924

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2268

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2808

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:2528

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
39257dbef45a759e3c44d0be045d8d61

SHA1
f75daf7947b40ce133359a29d84469b833f69a20

SHA256
ed3cb02276d4e304a8403ee3ebfb156e5b46e739f3e72cf91dd42ae9bbbfc9f7

SHA512
e06c4f54c854aaf76bb240457cc74c2bdeb26337daadec480b074719737a0993bfdd238f9c768a25a2fc37f06dbd6971ad185824875b086b4894a4237032d133

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
6298fb6f109a807ddfac1f8dcc014335

SHA1
36ad7ca09f15a364f8174df1f2f0b559454464c6

SHA256
a4ab229ff389272762db421d8591db5b272b8aa831823df71ba35fad98d7ba1d

SHA512
0eb439156c26088ec3516f472b6d05311b9cef226dd249d2932f4cd267e122bbc44cec031b924f8053d6013f9f34ecaca5ee874ee01cdd2ed662a9535549f345

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads