wannacry | 8623833369df77caf48fea8fbb02991288ec704408a6b2ab8f080e50c073bde3

General

Target

8623833369df77caf48fea8fbb02991288ec704408a6b2ab8f080e50c073bde3.dll
Size

5.0MB
MD5

ee5f76b5cc4312095074df3967b13617
SHA1

254d83a07c6171e926d624080d60c0715fb19f13
SHA256

8623833369df77caf48fea8fbb02991288ec704408a6b2ab8f080e50c073bde3
SHA512

2f9e0aeb58827a6564efc495e4e195a930c75e7892761346094af58a7250789bc55e80e88be73a80f60b4a403671eadbd9e98c5c88325a73d813e6102bef5fa4
SSDEEP

49152:znAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvxJM0H9:TDqPoBhz1aRxcSUDk36SAEdhvxWa9

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3236) 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

3020 mssecsvc.exe
2684 mssecsvc.exe
2784 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
3020	mssecsvc.exe
2684	mssecsvc.exe
2784	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\{D25A5B7E-7C27-41B6-85A7-D7DFDF730D14}\WpadDecisionReason = "1"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{D25A5B7E-7C27-41B6-85A7-D7DFDF730D14}\WpadDecisionTime = 20451150fdcdda01	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\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\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\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f0031000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{D25A5B7E-7C27-41B6-85A7-D7DFDF730D14}\WpadDecision = "0"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{D25A5B7E-7C27-41B6-85A7-D7DFDF730D14}\WpadNetworkName = "Network 3"	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\ZoneMap\	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\ProxyEnable = "0"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{D25A5B7E-7C27-41B6-85A7-D7DFDF730D14}	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0a-ff-bb-18-f6-f2\WpadDecision = "0"	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	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0a-ff-bb-18-f6-f2	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{D25A5B7E-7C27-41B6-85A7-D7DFDF730D14}\0a-ff-bb-18-f6-f2	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0a-ff-bb-18-f6-f2\WpadDecisionReason = "1"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0a-ff-bb-18-f6-f2\WpadDecisionTime = 20451150fdcdda01	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 3008 wrote to memory of 2400	3008	rundll32.exe	rundll32.exe
PID 3008 wrote to memory of 2400	3008	rundll32.exe	rundll32.exe
PID 3008 wrote to memory of 2400	3008	rundll32.exe	rundll32.exe
PID 3008 wrote to memory of 2400	3008	rundll32.exe	rundll32.exe
PID 3008 wrote to memory of 2400	3008	rundll32.exe	rundll32.exe
PID 3008 wrote to memory of 2400	3008	rundll32.exe	rundll32.exe
PID 3008 wrote to memory of 2400	3008	rundll32.exe	rundll32.exe
PID 2400 wrote to memory of 3020	2400	rundll32.exe	mssecsvc.exe
PID 2400 wrote to memory of 3020	2400	rundll32.exe	mssecsvc.exe
PID 2400 wrote to memory of 3020	2400	rundll32.exe	mssecsvc.exe
PID 2400 wrote to memory of 3020	2400	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8623833369df77caf48fea8fbb02991288ec704408a6b2ab8f080e50c073bde3.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3008

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8623833369df77caf48fea8fbb02991288ec704408a6b2ab8f080e50c073bde3.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2400

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:3020

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2784

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:2684

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
9890c9dbf8c659fa98130bba6c38683f

SHA1
42ae2ad8a47176f67f71f4b69552e37401a62d38

SHA256
860069ce5390b85cfff852295d2113ea0d052003f8c769c20184962aae6b37d6

SHA512
b5a196a8a9b25f57bc075ed117dbfe991f3cd7fff33f598cee5e1109caf749431221098098127fb2e0bdf8c820ccf236fe1a863c8f33c12dc7c055b33eca2d60

Download Submit
C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
dbcd133912ef8b511909bceafe6eb16d

SHA1
cdeb4dc71a6287ad3dc42de4ecd5cd160eae3ea2

SHA256
5265873b0641f1875701a126fcf56d45d1f4a91de77ee4e1ca5507a5062c362a

SHA512
1a5d5c78de9609bf60b62ab595dc4e1cd90ad9f3582b45052c1837578d10d86ab533340a3251db143ea19a8a157329bdd622a1ac88e3416883eab3b15a05a8cf

Download Submit

Resubmissions

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads