wannacry | 455185e7bdfab196c09c07c41eedebe9094b2230a6c7cea089b581ecb05f3b71

General

Target

bfe40cccbc006ac527ad7b89f3474f3b.dll
Size

5.0MB
MD5

bfe40cccbc006ac527ad7b89f3474f3b
SHA1

90a498067a926950fd01acf217ed12c10b8951a5
SHA256

455185e7bdfab196c09c07c41eedebe9094b2230a6c7cea089b581ecb05f3b71
SHA512

1ffce6d265f827c0faceeb4efcb82052e138f7a46357a35f6aedccbbd5ba9c68d8b107c71bdad7b3874e5f88b0ce56bbb6eb94e3903490c5e6878b184a881796

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (1265) 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

1332 mssecsvr.exe
1768 mssecsvr.exe

pid	process
1332	mssecsvr.exe
1768	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
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1"	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\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00b7000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{09198BD8-AAE4-4499-87F6-CDDADBEAFAA8}\WpadDecisionReason = "1"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{09198BD8-AAE4-4499-87F6-CDDADBEAFAA8}\06-b3-e2-21-6b-68	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\06-b3-e2-21-6b-68\WpadDecisionReason = "1"	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	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{09198BD8-AAE4-4499-87F6-CDDADBEAFAA8}	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{09198BD8-AAE4-4499-87F6-CDDADBEAFAA8}\WpadDecisionTime = a02a4776f29bd801	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{09198BD8-AAE4-4499-87F6-CDDADBEAFAA8}\WpadDecision = "0"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\06-b3-e2-21-6b-68\WpadDecisionTime = a02a4776f29bd801	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	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\Wpad\{09198BD8-AAE4-4499-87F6-CDDADBEAFAA8}\WpadNetworkName = "Network 3"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\06-b3-e2-21-6b-68	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\06-b3-e2-21-6b-68\WpadDecision = "0"	mssecsvr.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 324 wrote to memory of 2008	324	rundll32.exe	rundll32.exe
PID 324 wrote to memory of 2008	324	rundll32.exe	rundll32.exe
PID 324 wrote to memory of 2008	324	rundll32.exe	rundll32.exe
PID 324 wrote to memory of 2008	324	rundll32.exe	rundll32.exe
PID 324 wrote to memory of 2008	324	rundll32.exe	rundll32.exe
PID 324 wrote to memory of 2008	324	rundll32.exe	rundll32.exe
PID 324 wrote to memory of 2008	324	rundll32.exe	rundll32.exe
PID 2008 wrote to memory of 1332	2008	rundll32.exe	mssecsvr.exe
PID 2008 wrote to memory of 1332	2008	rundll32.exe	mssecsvr.exe
PID 2008 wrote to memory of 1332	2008	rundll32.exe	mssecsvr.exe
PID 2008 wrote to memory of 1332	2008	rundll32.exe	mssecsvr.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\bfe40cccbc006ac527ad7b89f3474f3b.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:324

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\bfe40cccbc006ac527ad7b89f3474f3b.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2008

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1332

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:1768

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Scanning

1

T1046

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\WINDOWS\mssecsvr.exe

Filesize
3.6MB

MD5
4e07145d88c956d214aee28e90bb824c

SHA1
43d1623c5c50b16fb225ae08612e748b02a6ae55

SHA256
81874cf0cdf5f05c2375d9c56894f9a1515f296833f99be77ae496ac0dca212e

SHA512
52d0833d4e744f55f0fe8be17c8ba39c0a58c685b0eb029f4657aec681b2103e8fb1c960b2854d3bc29d9e8102efae3f53db1e7aba71dbbf7f52e60a45ad2350

Download Submit
C:\Windows\mssecsvr.exe

Filesize
3.6MB

MD5
4e07145d88c956d214aee28e90bb824c

SHA1
43d1623c5c50b16fb225ae08612e748b02a6ae55

SHA256
81874cf0cdf5f05c2375d9c56894f9a1515f296833f99be77ae496ac0dca212e

SHA512
52d0833d4e744f55f0fe8be17c8ba39c0a58c685b0eb029f4657aec681b2103e8fb1c960b2854d3bc29d9e8102efae3f53db1e7aba71dbbf7f52e60a45ad2350

Download Submit
C:\Windows\mssecsvr.exe

Filesize
3.6MB

MD5
4e07145d88c956d214aee28e90bb824c

SHA1
43d1623c5c50b16fb225ae08612e748b02a6ae55

SHA256
81874cf0cdf5f05c2375d9c56894f9a1515f296833f99be77ae496ac0dca212e

SHA512
52d0833d4e744f55f0fe8be17c8ba39c0a58c685b0eb029f4657aec681b2103e8fb1c960b2854d3bc29d9e8102efae3f53db1e7aba71dbbf7f52e60a45ad2350

Download Submit
memory/1332-56-0x0000000000000000-mapping.dmp

Download
memory/2008-54-0x0000000000000000-mapping.dmp

Download
memory/2008-55-0x0000000075C41000-0x0000000075C43000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads