wannacry | 428d1c4d0117e411702a862c3a0a3291e6320619efa85bc3ff6fb7545a4963fe

General

Target

428d1c4d0117e411702a862c3a0a3291e6320619efa85bc3ff6fb7545a4963fe.dll
Size

5.0MB
MD5

eb4fc1bd221937574924cc0ac0a3a288
SHA1

afd962dab5ed8590131797af24937d16fb935075
SHA256

428d1c4d0117e411702a862c3a0a3291e6320619efa85bc3ff6fb7545a4963fe
SHA512

88e01a1a9863bd653efedcbfb5be525b1c07117a90674df86ae129ef8a53a3e090ff417fcb345d308fa17dfa2332313764d112ad839b307678e7126e0038af33

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (1271) 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

1788 mssecsvr.exe
1228 mssecsvr.exe

pid	process
1788	mssecsvr.exe
1228	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 (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	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	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\{B804901C-E5EA-4BA0-8B1C-59E100817323}	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{B804901C-E5EA-4BA0-8B1C-59E100817323}\WpadDecision = "0"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{B804901C-E5EA-4BA0-8B1C-59E100817323}\66-4d-ea-88-8f-fc	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\66-4d-ea-88-8f-fc\WpadDecisionReason = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "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\66-4d-ea-88-8f-fc\WpadDecisionTime = 408fd85a8192d801	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\66-4d-ea-88-8f-fc\WpadDecision = "0"	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\ZoneMap\UNCAsIntranet = "0"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{B804901C-E5EA-4BA0-8B1C-59E100817323}\WpadDecisionTime = 408fd85a8192d801	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f0081000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{B804901C-E5EA-4BA0-8B1C-59E100817323}\WpadDecisionReason = "1"	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{B804901C-E5EA-4BA0-8B1C-59E100817323}\WpadNetworkName = "Network 3"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\66-4d-ea-88-8f-fc	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 (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1"	mssecsvr.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1672 wrote to memory of 1044	1672	rundll32.exe	rundll32.exe
PID 1672 wrote to memory of 1044	1672	rundll32.exe	rundll32.exe
PID 1672 wrote to memory of 1044	1672	rundll32.exe	rundll32.exe
PID 1672 wrote to memory of 1044	1672	rundll32.exe	rundll32.exe
PID 1672 wrote to memory of 1044	1672	rundll32.exe	rundll32.exe
PID 1672 wrote to memory of 1044	1672	rundll32.exe	rundll32.exe
PID 1672 wrote to memory of 1044	1672	rundll32.exe	rundll32.exe
PID 1044 wrote to memory of 1788	1044	rundll32.exe	mssecsvr.exe
PID 1044 wrote to memory of 1788	1044	rundll32.exe	mssecsvr.exe
PID 1044 wrote to memory of 1788	1044	rundll32.exe	mssecsvr.exe
PID 1044 wrote to memory of 1788	1044	rundll32.exe	mssecsvr.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\428d1c4d0117e411702a862c3a0a3291e6320619efa85bc3ff6fb7545a4963fe.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1672

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\428d1c4d0117e411702a862c3a0a3291e6320619efa85bc3ff6fb7545a4963fe.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1044

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1788

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:1228

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

Replay Monitor

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Downloads

C:\WINDOWS\mssecsvr.exe
Filesize
2.2MB

MD5
62180ead35e6fedb93ba960723677234

SHA1
1abea4ae361b8913c2899360a9f9af2a9298afac

SHA256
77567c06b21ed35775db8a2e16bfe02af0a71ea3bcb43ae39b4b6da640c2d6b8

SHA512
b00b27de6df0dadfb85c8334d987561b399ec4491d5f78fbe2cda955c859026672cb45218801f5b9d3174a9a16220e7b19425d3d2f9071c3e525b0077e644689

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

MD5
62180ead35e6fedb93ba960723677234

SHA1
1abea4ae361b8913c2899360a9f9af2a9298afac

SHA256
77567c06b21ed35775db8a2e16bfe02af0a71ea3bcb43ae39b4b6da640c2d6b8

SHA512
b00b27de6df0dadfb85c8334d987561b399ec4491d5f78fbe2cda955c859026672cb45218801f5b9d3174a9a16220e7b19425d3d2f9071c3e525b0077e644689

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

MD5
62180ead35e6fedb93ba960723677234

SHA1
1abea4ae361b8913c2899360a9f9af2a9298afac

SHA256
77567c06b21ed35775db8a2e16bfe02af0a71ea3bcb43ae39b4b6da640c2d6b8

SHA512
b00b27de6df0dadfb85c8334d987561b399ec4491d5f78fbe2cda955c859026672cb45218801f5b9d3174a9a16220e7b19425d3d2f9071c3e525b0077e644689

Download Submit
memory/1044-54-0x0000000000000000-mapping.dmp

Download
memory/1044-55-0x00000000763C1000-0x00000000763C3000-memory.dmp

Filesize
8KB

Download
memory/1788-56-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads