wannacry | 4b721f99c5b9ee83b3e7b1927056985c7aae2f6e3fac0f0f3dc08cbd24ccb270

General

Target
2024-10-12_0077238064f7f71dd35e164f9dde8828_wannacry.exe
Size 2.2MB
Sample241012-e1gjhaxfmj
SHA256 4b721f99c5b9ee83b3e7b1927056985c7aae2f6e3fac0f0f3dc08cbd24ccb270
MD5 0077238064f7f71dd35e164f9dde8828
SHA1 4ac6074d2b57231a546481d3b209f9b173e0d2bd
SHA512 1242df145c5dc5f0cc768757c42a681e4114c2ee921e13dc7e771f6190b3396571f4f3663d4047a3e0fd41966bfe60c1d9d1c1607548f6f587f42e20e36114f9
SSDEEP 24576:QbLguriIfEcQdIvrYbcMNgef0QeQjG/D8kIq9vn:QnpEjbcBVQej/5vn
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3182) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046

Executes dropped EXE 1 IoCs

pid	Process
2292	tasksche.exe

Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE	2024-10-12_0077238064f7f71dd35e164f9dde8828_wannacry.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies	2024-10-12_0077238064f7f71dd35e164f9dde8828_wannacry.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5	2024-10-12_0077238064f7f71dd35e164f9dde8828_wannacry.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5	2024-10-12_0077238064f7f71dd35e164f9dde8828_wannacry.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\__tmp_rar_sfx_access_check_240622562	tasksche.exe
File created	C:\Windows\eee.exe	tasksche.exe
File created	C:\WINDOWS\tasksche.exe	2024-10-12_0077238064f7f71dd35e164f9dde8828_wannacry.exe

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2024-10-12_0077238064f7f71dd35e164f9dde8828_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2024-10-12_0077238064f7f71dd35e164f9dde8828_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tasksche.exe

Modifies data under HKEY_USERS 15 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft	2024-10-12_0077238064f7f71dd35e164f9dde8828_wannacry.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	2024-10-12_0077238064f7f71dd35e164f9dde8828_wannacry.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P\History	2024-10-12_0077238064f7f71dd35e164f9dde8828_wannacry.exe
Key created	\REGISTRY\USER\.DEFAULT\Software	2024-10-12_0077238064f7f71dd35e164f9dde8828_wannacry.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion	2024-10-12_0077238064f7f71dd35e164f9dde8828_wannacry.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	2024-10-12_0077238064f7f71dd35e164f9dde8828_wannacry.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	2024-10-12_0077238064f7f71dd35e164f9dde8828_wannacry.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	2024-10-12_0077238064f7f71dd35e164f9dde8828_wannacry.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P	2024-10-12_0077238064f7f71dd35e164f9dde8828_wannacry.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	2024-10-12_0077238064f7f71dd35e164f9dde8828_wannacry.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	2024-10-12_0077238064f7f71dd35e164f9dde8828_wannacry.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	2024-10-12_0077238064f7f71dd35e164f9dde8828_wannacry.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows	2024-10-12_0077238064f7f71dd35e164f9dde8828_wannacry.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	2024-10-12_0077238064f7f71dd35e164f9dde8828_wannacry.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	2024-10-12_0077238064f7f71dd35e164f9dde8828_wannacry.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2208 wrote to memory of 2292	2208	2024-10-12_0077238064f7f71dd35e164f9dde8828_wannacry.exe	87
PID 2208 wrote to memory of 2292	2208	2024-10-12_0077238064f7f71dd35e164f9dde8828_wannacry.exe	87
PID 2208 wrote to memory of 2292	2208	2024-10-12_0077238064f7f71dd35e164f9dde8828_wannacry.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-10-12_0077238064f7f71dd35e164f9dde8828_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-10-12_0077238064f7f71dd35e164f9dde8828_wannacry.exe"
1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2208
- C:\WINDOWS\tasksche.exe
  C:\WINDOWS\tasksche.exe /i
  2⤵
  - Executes dropped EXE
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  PID:2292

C:\Users\Admin\AppData\Local\Temp\2024-10-12_0077238064f7f71dd35e164f9dde8828_wannacry.exe
C:\Users\Admin\AppData\Local\Temp\2024-10-12_0077238064f7f71dd35e164f9dde8828_wannacry.exe -m security
1⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:5072

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

2

T1046

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

tasksche.exe

Path C:\Windows\tasksche.exe
Size 2.0MB
SHA256 a2bc4ceb451f9f81fed063b395a6a0a9e7d4cc06e311df15d082bd0a7081d8c4
MD5 c6380d7dbc203786e1d790563fdcdab1
SHA1 3ad71555d309cb8075ebdffdbc323279110572d9
SHA512 e2eb48c4a6781ccf00c2d75d36c0a762a814dfda030481ee4f0ada456895442f6ce75f5e9e8ddc487dd41d6f469347ba007398a48901e6ce3e2df0725548ba38
SSDEEP 24576:tiIfEcQdIvrYbcMNgef0QeQjG/D8kIq9vm:XEjbcBVQej/5vm
MD5 SHA1 SHA512 SSDEEP

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