Analysis
- max time kernel
93s - max time network
113s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system - submitted
29/02/2024, 01:24
Behavioral task
behavioral1
Sample
2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe
Resource
win7-20240221-en
windows7-x64
15 signatures
150 seconds
Behavioral task
behavioral2
Sample
2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe
Resource
win10v2004-20240226-en
windows10-2004-x64
17 signatures
150 seconds
General
- Target 2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe
- Size 115KB
- Sample240229-bsgyhsab2y
- SHA256 77c6b723977f4853e12c83840f1ea3a3e62c22e586273880dad377b8bfe95d7b
- MD5 02b069c665a623a1f5624eca23e93531
- SHA1 61f4fc34711a714cb29f4b9f74911e9c89997a83
- SHA512 e3dab7f2a5596bba14e95f8fe04d2b308df0eb47394d7fd12451aaba245578170bd5192757f0d5bc52abedaa5f70ebe454fd7ae759e93fd71ce172488a1c34e7
- SSDEEP 3072:Boy3MtAr9zjAoclgHqO6pshDPbSk7nXE:Fxr9zYO6sFeKnX
- MD5 SHA1 SHA512 SSDEEP
Score
10/10
Malware Config
Signatures
- Chaos
Ransomware family first seen in June 2021.
- Chaos Ransomware 2 IoCs
resource yara_rule behavioral2/memory/3392-0-0x0000000000120000-0x0000000000144000-memory.dmp family_chaos behavioral2/files/0x0008000000023206-6.dat family_chaos - Detects command variations typically used by ransomware 2 IoCs
resource yara_rule behavioral2/memory/3392-0-0x0000000000120000-0x0000000000144000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral2/files/0x0008000000023206-6.dat INDICATOR_SUSPICIOUS_GENRansomware - Renames multiple (238) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation 2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe Key value queried \REGISTRY\USER\S-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation svchost.exe - Drops startup file 3 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\oku.txt svchost.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.url svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini svchost.exe - Executes dropped EXE 1 IoCs
pid Process 5028 svchost.exe - Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Drops desktop.ini file(s) 34 IoCs
description ioc Process File opened for modification C:\Users\Admin\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\Camera Roll\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessibility\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\System Tools\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Downloads\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Public\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\Saved Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\desktop.ini svchost.exe File opened for modification C:\Users\Admin\OneDrive\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-399997616-3400990511-967324271-1000\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Music\desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Saved Games\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Searches\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\AccountPictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\desktop.ini svchost.exe - Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-399997616-3400990511-967324271-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\8trjnm7va.jpg" svchost.exe - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-399997616-3400990511-967324271-1000_Classes\Local Settings svchost.exe - Opens file in notepad (likely ransom note) 1 IoCs
pid Process 1908 NOTEPAD.EXE - Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 5028 svchost.exe - Suspicious behavior: EnumeratesProcesses 51 IoCs
pid Process 3392 2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe 3392 2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe 3392 2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe 3392 2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe 3392 2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe 3392 2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe 3392 2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe 3392 2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe 3392 2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe 3392 2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe 3392 2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe 3392 2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe 3392 2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe 3392 2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe 3392 2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe 3392 2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe 3392 2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe 3392 2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe 3392 2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe 3392 2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe 3392 2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe 3392 2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe 3392 2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe 3392 2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe 3392 2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe 5028 svchost.exe 5028 svchost.exe 5028 svchost.exe 5028 svchost.exe 5028 svchost.exe 5028 svchost.exe 5028 svchost.exe 5028 svchost.exe 5028 svchost.exe 5028 svchost.exe 5028 svchost.exe 5028 svchost.exe 5028 svchost.exe 5028 svchost.exe 5028 svchost.exe 5028 svchost.exe 5028 svchost.exe 5028 svchost.exe 5028 svchost.exe 5028 svchost.exe 5028 svchost.exe 5028 svchost.exe 5028 svchost.exe 5028 svchost.exe 5028 svchost.exe 5028 svchost.exe - Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 3392 2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe Token: SeDebugPrivilege 5028 svchost.exe - Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 3392 wrote to memory of 5028 3392 2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe 94 PID 3392 wrote to memory of 5028 3392 2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe 94 PID 5028 wrote to memory of 1908 5028 svchost.exe 97 PID 5028 wrote to memory of 1908 5028 svchost.exe 97
Processes
-
C:\Users\Admin\AppData\Local\Temp\2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-29_02b069c665a623a1f5624eca23e93531_wannacry.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3392 -
C:\Users\Admin\AppData\Roaming\svchost.exe"C:\Users\Admin\AppData\Roaming\svchost.exe"2⤵
- Checks computer location settings
- Drops startup file
- Executes dropped EXE
- Drops desktop.ini file(s)
- Sets desktop wallpaper using registry
- Modifies registry class
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5028 -
C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\oku.txt3⤵
- Opens file in notepad (likely ransom note)
PID:1908
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Roaming\svchost.exe
- Size 115KB
- SHA256 77c6b723977f4853e12c83840f1ea3a3e62c22e586273880dad377b8bfe95d7b
- MD5 02b069c665a623a1f5624eca23e93531
- SHA1 61f4fc34711a714cb29f4b9f74911e9c89997a83
- SHA512 e3dab7f2a5596bba14e95f8fe04d2b308df0eb47394d7fd12451aaba245578170bd5192757f0d5bc52abedaa5f70ebe454fd7ae759e93fd71ce172488a1c34e7
- SSDEEP 3072:Boy3MtAr9zjAoclgHqO6pshDPbSk7nXE:Fxr9zYO6sFeKnX
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\Documents\oku.txt
- Size 24B
- SHA256 0242a40c7b00447a3bd85c2f3127984a476eb956fdfcd992127002e43858c4be
- MD5 1690030e3e47c7279a09e349932ef2de
- SHA1 1f906ba8450050c910449ee0d3fa9cb644580c36
- SHA512 95f2aadfc6229cc4d0f37808e640f9d9696abb568f1e5ca405e87719077c21a91c5ff1a500c53a2c211cc7d71eaf0b48fa0bd85c1a81eb3f71ed062423f56758
- MD5 SHA1 SHA512