Joe Sandbox Cloud Basic Analysis Report

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Windows Analysis Report
love.exe

Overview

General Information

Sample Name:love.exe
Analysis ID:651266
MD5:f3c4ce7dd49e5728b3dd941ef7e95313
SHA1:2c833a4195815f3fdeddc7996e10b17fc2abb3e8
SHA256:139da5e39dff492d6163311fdcba5daaf916877cc8575e120ffba9b2bda65536
Tags:exe
Infos:

Detection

AgentTesla
Score:100
Range:0 - 100
Whitelisted:false
Confidence:100%

Signatures

Multi AV Scanner detection for submitted file
Malicious sample detected (through community Yara rule)
Yara detected Telegram RAT
Yara detected AgentTesla
Multi AV Scanner detection for dropped file
Snort IDS alert for network traffic
Tries to steal Mail credentials (via file / registry access)
Writes to foreign memory regions
Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc)
Tries to harvest and steal ftp login credentials
Yara detected Costura Assembly Loader
Uses the Telegram API (likely for C&C communication)
Machine Learning detection for sample
.NET source code contains potential unpacker
Injects a PE file into a foreign processes
Yara detected Generic Downloader
.NET source code contains very large array initializations
Machine Learning detection for dropped file
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Tries to harvest and steal browser information (history, passwords, etc)
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Uses 32bit PE files
Queries the volume information (name, serial number etc) of a device
Yara signature match
Antivirus or Machine Learning detection for unpacked file
May sleep (evasive loops) to hinder dynamic analysis
Uses code obfuscation techniques (call, push, ret)
Detected potential crypto function
Sample execution stops while process was sleeping (likely an evasion)
Yara detected Credential Stealer
JA3 SSL client fingerprint seen in connection with other malware
HTTP GET or POST without a user agent
IP address seen in connection with other malware
Contains long sleeps (>= 3 min)
Enables debug privileges
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Sample file is different than original file name gathered from version info
PE file contains strange resources
Drops PE files
Queries sensitive processor information (via WMI, Win32_Processor, often done to detect virtual machines)
Monitors certain registry keys / values for changes (often done to protect autostart functionality)
Creates a process in suspended mode (likely to inject code)

Classification

Process Tree

  • System is w10x64
  • love.exe (PID: 6232 cmdline: "C:\Users\user\Desktop\love.exe" MD5: F3C4CE7DD49E5728B3DD941EF7E95313)
    • cmd.exe (PID: 6972 cmdline: "C:\Windows\System32\cmd.exe" /c timeout 20 MD5: F3BDBE3BB6F734E357235F4D5898582D)
      • conhost.exe (PID: 6980 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
      • timeout.exe (PID: 7012 cmdline: timeout 20 MD5: 121A4EDAE60A7AF6F5DFA82F7BB95659)
    • InstallUtil.exe (PID: 4528 cmdline: C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe MD5: EFEC8C379D165E3F33B536739AEE26A3)
  • Grjwvl.exe (PID: 6984 cmdline: "C:\Users\user\AppData\Roaming\Mgfknof\Grjwvl.exe" MD5: F3C4CE7DD49E5728B3DD941EF7E95313)
    • cmd.exe (PID: 2292 cmdline: "C:\Windows\System32\cmd.exe" /c timeout 20 MD5: F3BDBE3BB6F734E357235F4D5898582D)
      • conhost.exe (PID: 2168 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
      • timeout.exe (PID: 4400 cmdline: timeout 20 MD5: 121A4EDAE60A7AF6F5DFA82F7BB95659)
    • InstallUtil.exe (PID: 5096 cmdline: C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe MD5: EFEC8C379D165E3F33B536739AEE26A3)
  • Grjwvl.exe (PID: 5632 cmdline: "C:\Users\user\AppData\Roaming\Mgfknof\Grjwvl.exe" MD5: F3C4CE7DD49E5728B3DD941EF7E95313)
    • BackgroundTransferHost.exe (PID: 3896 cmdline: "BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.1 MD5: 02BA81746B929ECC9DB6665589B68335)
    • cmd.exe (PID: 5872 cmdline: "C:\Windows\System32\cmd.exe" /c timeout 20 MD5: F3BDBE3BB6F734E357235F4D5898582D)
      • conhost.exe (PID: 5960 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
      • timeout.exe (PID: 3952 cmdline: timeout 20 MD5: 121A4EDAE60A7AF6F5DFA82F7BB95659)
    • InstallUtil.exe (PID: 3896 cmdline: C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe MD5: EFEC8C379D165E3F33B536739AEE26A3)
    • InstallUtil.exe (PID: 1296 cmdline: C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe MD5: EFEC8C379D165E3F33B536739AEE26A3)
  • cleanup

Malware Configuration

Threatname: Telegram RAT

{"C2 url": "https://api.telegram.org/bot5310370668:AAEdB2nfvvFj53YoaxJ-AleA2m93WUxxyM0/sendMessage"}

Threatname: Agenttesla

{"Exfil Mode": "Telegram", "Chat id": "5334267822", "Chat URL": "https://api.telegram.org/bot5310370668:AAEdB2nfvvFj53YoaxJ-AleA2m93WUxxyM0/sendDocument"}

Yara Signatures

Memory Dumps

SourceRuleDescriptionAuthorStrings
00000015.00000003.391274838.0000000007C61000.00000004.00000800.00020000.00000000.sdmpJoeSecurity_CosturaAssemblyLoaderYara detected Costura Assembly LoaderJoe Security
    00000000.00000002.343016197.00000000040FF000.00000004.00000800.00020000.00000000.sdmpJoeSecurity_AgentTesla_1Yara detected AgentTeslaJoe Security
      00000000.00000002.343016197.00000000040FF000.00000004.00000800.00020000.00000000.sdmpJoeSecurity_AgentTesla_2Yara detected AgentTeslaJoe Security
        00000000.00000003.276619656.0000000008226000.00000004.00000800.00020000.00000000.sdmpJoeSecurity_CosturaAssemblyLoaderYara detected Costura Assembly LoaderJoe Security
          00000015.00000002.464002231.00000000040BF000.00000004.00000800.00020000.00000000.sdmpJoeSecurity_AgentTesla_1Yara detected AgentTeslaJoe Security
            Click to see the 82 entries

            Unpacked PEs

            SourceRuleDescriptionAuthorStrings
            18.2.Grjwvl.exe.387fd08.2.unpackJoeSecurity_AgentTesla_1Yara detected AgentTeslaJoe Security
              18.2.Grjwvl.exe.387fd08.2.unpackJoeSecurity_AgentTesla_2Yara detected AgentTeslaJoe Security
                18.2.Grjwvl.exe.387fd08.2.unpackMALWARE_Win_AgentTeslaV3AgentTeslaV3 infostealer payloadditekSHen
                • 0x30e1c:$s10: logins
                • 0x30883:$s11: credential
                • 0x2cdc3:$g1: get_Clipboard
                • 0x2cdd1:$g2: get_Keyboard
                • 0x2cdde:$g3: get_Password
                • 0x2e0cf:$g4: get_CtrlKeyDown
                • 0x2e0df:$g5: get_ShiftKeyDown
                • 0x2e0f0:$g6: get_AltKeyDown
                21.2.Grjwvl.exe.406fd08.1.raw.unpackJoeSecurity_AgentTesla_1Yara detected AgentTeslaJoe Security
                  21.2.Grjwvl.exe.406fd08.1.raw.unpackJoeSecurity_AgentTesla_2Yara detected AgentTeslaJoe Security