wannacry | b610f6bae1dbd0253c508d9995d18ebdad3d985b84060ec9eaf39472d8903e2b

General

Target

6927111c4d2937c06c1cc3978d2e9214.dll
Size

5.0MB
MD5

6927111c4d2937c06c1cc3978d2e9214
SHA1

66a1ee19b5b71f0011a887f971ff1243daf7c63e
SHA256

b610f6bae1dbd0253c508d9995d18ebdad3d985b84060ec9eaf39472d8903e2b
SHA512

4244c666e87d4a4e0b409fffbb58c2734b954a62d9546fb7fb5558ac9da0f949648f4c7237876a8fc7f226f7fa479b791c626d375900cd2f354417f986adde6e

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (1227) 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

1364 mssecsvr.exe
2028 mssecsvr.exe

pid	process
1364	mssecsvr.exe
2028	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\Wpad\06-75-a7-dd-b9-dc\WpadDecisionReason = "1"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\06-75-a7-dd-b9-dc\WpadDecisionTime = b0623df2ec9bd801	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00cd000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{2E9134DB-3C23-4031-8933-B00BB05E13E0}\WpadDecision = "0"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{2E9134DB-3C23-4031-8933-B00BB05E13E0}\06-75-a7-dd-b9-dc	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	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{2E9134DB-3C23-4031-8933-B00BB05E13E0}	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{2E9134DB-3C23-4031-8933-B00BB05E13E0}\WpadDecisionReason = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\06-75-a7-dd-b9-dc\WpadDecision = "0"	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\ZoneMap\UNCAsIntranet = "0"	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{2E9134DB-3C23-4031-8933-B00BB05E13E0}\WpadDecisionTime = b0623df2ec9bd801	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{2E9134DB-3C23-4031-8933-B00BB05E13E0}\WpadNetworkName = "Network 3"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\06-75-a7-dd-b9-dc	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 (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	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 1800 wrote to memory of 1224	1800	rundll32.exe	rundll32.exe
PID 1800 wrote to memory of 1224	1800	rundll32.exe	rundll32.exe
PID 1800 wrote to memory of 1224	1800	rundll32.exe	rundll32.exe
PID 1800 wrote to memory of 1224	1800	rundll32.exe	rundll32.exe
PID 1800 wrote to memory of 1224	1800	rundll32.exe	rundll32.exe
PID 1800 wrote to memory of 1224	1800	rundll32.exe	rundll32.exe
PID 1800 wrote to memory of 1224	1800	rundll32.exe	rundll32.exe
PID 1224 wrote to memory of 1364	1224	rundll32.exe	mssecsvr.exe
PID 1224 wrote to memory of 1364	1224	rundll32.exe	mssecsvr.exe
PID 1224 wrote to memory of 1364	1224	rundll32.exe	mssecsvr.exe
PID 1224 wrote to memory of 1364	1224	rundll32.exe	mssecsvr.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\6927111c4d2937c06c1cc3978d2e9214.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1800

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\6927111c4d2937c06c1cc3978d2e9214.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1224

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1364

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:2028

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
2.2MB

MD5
ad1a6a33842bac7618e6796767ab556d

SHA1
6622c1514b7c7d677669cdae5497736727941e2e

SHA256
6201c93531f535842ba413bbfec852119d3349c48f93110521ac74d61c01c326

SHA512
5f3fd6cef4cf27c4362e5b23c7380594f2b3f7d3596b56fb1a1eb58d688e2147b3ee538ce3da3dd6d67d3789fa68ef6744d62cc598050869ac4e7dc305694b8d

Download Submit
C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
ad1a6a33842bac7618e6796767ab556d

SHA1
6622c1514b7c7d677669cdae5497736727941e2e

SHA256
6201c93531f535842ba413bbfec852119d3349c48f93110521ac74d61c01c326

SHA512
5f3fd6cef4cf27c4362e5b23c7380594f2b3f7d3596b56fb1a1eb58d688e2147b3ee538ce3da3dd6d67d3789fa68ef6744d62cc598050869ac4e7dc305694b8d

Download Submit
C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
ad1a6a33842bac7618e6796767ab556d

SHA1
6622c1514b7c7d677669cdae5497736727941e2e

SHA256
6201c93531f535842ba413bbfec852119d3349c48f93110521ac74d61c01c326

SHA512
5f3fd6cef4cf27c4362e5b23c7380594f2b3f7d3596b56fb1a1eb58d688e2147b3ee538ce3da3dd6d67d3789fa68ef6744d62cc598050869ac4e7dc305694b8d

Download Submit
memory/1224-54-0x0000000000000000-mapping.dmp

Download
memory/1224-55-0x0000000076291000-0x0000000076293000-memory.dmp

Filesize
8KB

Download
memory/1364-56-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads