wannacry | 50601aefc90eeec3293a8ff01cdc838eb467b39baa4d821b488bde72a0cff2d0

General

Target

226bc9bf49ebc95bfcf27565897de584.dll
Size

5.0MB
MD5

226bc9bf49ebc95bfcf27565897de584
SHA1

083d6f6cf152a6c23d5184a632a10336f584586c
SHA256

50601aefc90eeec3293a8ff01cdc838eb467b39baa4d821b488bde72a0cff2d0
SHA512

cf963c0f3fdaf2e438fe52d479a33e3daecda14b4013d9fc9f3168d2102b9597ea1ccfdcb12d789bc5c61537eecd0ec3113a71d036d7494533a2e1f86fef61a1

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (1274) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Scanning
T1046
Executes dropped EXE 2 IoCs

Processes:

mssecsvr.exemssecsvr.exe

pid process

1452 mssecsvr.exe
1408 mssecsvr.exe

pid	process
1452	mssecsvr.exe
1408	mssecsvr.exe

Drops file in System32 directory 1 IoCs

Processes:

mssecsvr.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\counters.dat	mssecsvr.exe

Drops file in Windows directory 2 IoCs

Processes:

rundll32.exemssecsvr.exe

description ioc process

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

description	ioc	process
File created	C:\WINDOWS\mssecsvr.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvr.exe

Modifies data under HKEY_USERS 24 IoCs

Processes:

mssecsvr.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\22-26-7f-50-2d-c5\WpadDecision = "0"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3C30BD6C-E442-4C4B-8171-8241858DD52E}\22-26-7f-50-2d-c5	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3C30BD6C-E442-4C4B-8171-8241858DD52E}	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3C30BD6C-E442-4C4B-8171-8241858DD52E}\WpadDecisionReason = "1"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "0"	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\22-26-7f-50-2d-c5\WpadDecisionTime = a05aac14e79bd801	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3C30BD6C-E442-4C4B-8171-8241858DD52E}\WpadDecision = "0"	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3C30BD6C-E442-4C4B-8171-8241858DD52E}\WpadNetworkName = "Network 3"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\22-26-7f-50-2d-c5	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00d2000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3C30BD6C-E442-4C4B-8171-8241858DD52E}\WpadDecisionTime = a05aac14e79bd801	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\22-26-7f-50-2d-c5\WpadDecisionReason = "1"	mssecsvr.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1920 wrote to memory of 896	1920	rundll32.exe	rundll32.exe
PID 1920 wrote to memory of 896	1920	rundll32.exe	rundll32.exe
PID 1920 wrote to memory of 896	1920	rundll32.exe	rundll32.exe
PID 1920 wrote to memory of 896	1920	rundll32.exe	rundll32.exe
PID 1920 wrote to memory of 896	1920	rundll32.exe	rundll32.exe
PID 1920 wrote to memory of 896	1920	rundll32.exe	rundll32.exe
PID 1920 wrote to memory of 896	1920	rundll32.exe	rundll32.exe
PID 896 wrote to memory of 1452	896	rundll32.exe	mssecsvr.exe
PID 896 wrote to memory of 1452	896	rundll32.exe	mssecsvr.exe
PID 896 wrote to memory of 1452	896	rundll32.exe	mssecsvr.exe
PID 896 wrote to memory of 1452	896	rundll32.exe	mssecsvr.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\226bc9bf49ebc95bfcf27565897de584.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1920

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\226bc9bf49ebc95bfcf27565897de584.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:896

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1452

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:1408

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Scanning

1

T1046

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\WINDOWS\mssecsvr.exe
Filesize
2.2MB

MD5
fc24c0d4be45c404a3f1df284dd4587c

SHA1
287ffd59c71e9bca5d40d0c23498564e8bd13465

SHA256
274e1b4dff5c9312061a6c6ccfd7bc7d21f26b4202baac5f5c78be2670b7f767

SHA512
e04ae529de12b4808fd86b43774cdaa70ef57f6c124a50e2d9ad5ab77cd8c76927574b08accb9c72156b26941363b30e8dcbeb9d3626f1a41b0f2083862f2c72

Download Submit
C:\Windows\mssecsvr.exe
Filesize
2.2MB

MD5
fc24c0d4be45c404a3f1df284dd4587c

SHA1
287ffd59c71e9bca5d40d0c23498564e8bd13465

SHA256
274e1b4dff5c9312061a6c6ccfd7bc7d21f26b4202baac5f5c78be2670b7f767

SHA512
e04ae529de12b4808fd86b43774cdaa70ef57f6c124a50e2d9ad5ab77cd8c76927574b08accb9c72156b26941363b30e8dcbeb9d3626f1a41b0f2083862f2c72

Download Submit
C:\Windows\mssecsvr.exe
Filesize
2.2MB

MD5
fc24c0d4be45c404a3f1df284dd4587c

SHA1
287ffd59c71e9bca5d40d0c23498564e8bd13465

SHA256
274e1b4dff5c9312061a6c6ccfd7bc7d21f26b4202baac5f5c78be2670b7f767

SHA512
e04ae529de12b4808fd86b43774cdaa70ef57f6c124a50e2d9ad5ab77cd8c76927574b08accb9c72156b26941363b30e8dcbeb9d3626f1a41b0f2083862f2c72

Download Submit
memory/896-54-0x0000000000000000-mapping.dmp

Download
memory/896-55-0x0000000075BB1000-0x0000000075BB3000-memory.dmp

Filesize
8KB

Download
memory/1452-56-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads