wannacry | fb906531e1ea9546e4df878394a50b9e679201c23a7ac59f69f5de2e6c0963a9

General

Target

fb906531e1ea9546e4df878394a50b9e679201c23a7ac59f69f5de2e6c0963a9.dll
Size

5.0MB
MD5

1e4a4f54b53b3f7dc1910eab98c1ddb5
SHA1

d48ba36a7699596d169cab53165d0d69c3f3ab4f
SHA256

fb906531e1ea9546e4df878394a50b9e679201c23a7ac59f69f5de2e6c0963a9
SHA512

804bea7c06739406c349ad66fbae311543e407a0992adb9d24dbbce6b28a91bb014903ae3807f1167858123fcfd232dc7c64387b807c384d42b803d97b21d359
SSDEEP

49152:RnGMSPbcBVL1INRx+TSqTdX1HkQo6SAARdhnv:1GPoB91aRxcSUDk36SAEdhv

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (983) 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

pid	Process
2004	mssecsvr.exe
1264	mssecsvr.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\counters.dat	mssecsvr.exe
File created	C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\Microsoft\Windows\Cookies\9Y7YPG4X.txt	mssecsvr.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\Microsoft\Windows\Cookies\9Y7YPG4X.txt	mssecsvr.exe

Drops file in Windows directory 2 IoCs

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

Modifies data under HKEY_USERS 24 IoCs

description	ioc	Process
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\Wpad\{A9A92B0C-85DC-4DE3-A09E-E59FC687F778}\WpadNetworkName = "Network 2"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\9a-fd-ec-60-57-e4\WpadDecisionReason = "1"	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\Connections	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 (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	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	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{A9A92B0C-85DC-4DE3-A09E-E59FC687F778}	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{A9A92B0C-85DC-4DE3-A09E-E59FC687F778}\WpadDecisionReason = "1"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{A9A92B0C-85DC-4DE3-A09E-E59FC687F778}\9a-fd-ec-60-57-e4	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\AutoDetect = "1"	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\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f0006000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{A9A92B0C-85DC-4DE3-A09E-E59FC687F778}\WpadDecisionTime = 30c1756671dcd801	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{A9A92B0C-85DC-4DE3-A09E-E59FC687F778}\WpadDecision = "0"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\9a-fd-ec-60-57-e4	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\9a-fd-ec-60-57-e4\WpadDecisionTime = 30c1756671dcd801	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "0"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\9a-fd-ec-60-57-e4\WpadDecision = "0"	mssecsvr.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 816 wrote to memory of 884	816	rundll32.exe	27
PID 816 wrote to memory of 884	816	rundll32.exe	27
PID 816 wrote to memory of 884	816	rundll32.exe	27
PID 816 wrote to memory of 884	816	rundll32.exe	27
PID 816 wrote to memory of 884	816	rundll32.exe	27
PID 816 wrote to memory of 884	816	rundll32.exe	27
PID 816 wrote to memory of 884	816	rundll32.exe	27
PID 884 wrote to memory of 2004	884	rundll32.exe	28
PID 884 wrote to memory of 2004	884	rundll32.exe	28
PID 884 wrote to memory of 2004	884	rundll32.exe	28
PID 884 wrote to memory of 2004	884	rundll32.exe	28

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\fb906531e1ea9546e4df878394a50b9e679201c23a7ac59f69f5de2e6c0963a9.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:816
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\fb906531e1ea9546e4df878394a50b9e679201c23a7ac59f69f5de2e6c0963a9.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:884
- - C:\WINDOWS\mssecsvr.exe
    C:\WINDOWS\mssecsvr.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:2004

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:1264

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
d6649cb748e4f5940595522ae491f5fe

SHA1
5199e158fab72c21127f6d0228832bee80502a40

SHA256
3bb93a692c19b232485464085a544475144c053ad806d824ff8954b1afc4c3f8

SHA512
41568abb90213686df960ed536e0158e88ccbd75f25e07b7ae20bc2dc4a1997506421b2b81690f9a79f6b2baa9d6a4091121a92035343f45f49a56e604330967

Download Submit
C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
d6649cb748e4f5940595522ae491f5fe

SHA1
5199e158fab72c21127f6d0228832bee80502a40

SHA256
3bb93a692c19b232485464085a544475144c053ad806d824ff8954b1afc4c3f8

SHA512
41568abb90213686df960ed536e0158e88ccbd75f25e07b7ae20bc2dc4a1997506421b2b81690f9a79f6b2baa9d6a4091121a92035343f45f49a56e604330967

Download Submit
C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
d6649cb748e4f5940595522ae491f5fe

SHA1
5199e158fab72c21127f6d0228832bee80502a40

SHA256
3bb93a692c19b232485464085a544475144c053ad806d824ff8954b1afc4c3f8

SHA512
41568abb90213686df960ed536e0158e88ccbd75f25e07b7ae20bc2dc4a1997506421b2b81690f9a79f6b2baa9d6a4091121a92035343f45f49a56e604330967

Download Submit
memory/884-55-0x0000000075DF1000-0x0000000075DF3000-memory.dmp

Filesize
8KB

Download

Analysis

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