Overview

overview

10

Static

static

7a383f57f7...04.exe

windows7_x64

10

7a383f57f7...04.exe

windows10_x64

10

Sharing

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General

  • Target

    7a383f57f7d2190d9af3e57d67cfb004

  • Size

    6.9MB

  • Sample

    210611-6mrlmxxzts

  • MD5

    7a383f57f7d2190d9af3e57d67cfb004

  • SHA1

    2e783c279542ea1708854413a0cd725184f8fa78

  • SHA256

    f18e085889d9d7324c57ecb800563ba2e808c0ef8ad52b7b1f1f3afa169bf836

  • SHA512

    0f2509170c215efd58a09b4a00d593f087773da93f1877aab9b9f24474b06ad62494fa730fc435829a0365d7bd3d7440818a99e1b4c866882a0ed1cdc3eec9cb

Score
10/10
servhelperbackdoordiscoveryexploitpersistencetrojanupx

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
ps1.dropper

https://raw.githubusercontent.com/sqlitey/sqlite/master/speed.ps1

Targets

    • Target

      7a383f57f7d2190d9af3e57d67cfb004

    • Size

      6.9MB

    • MD5

      7a383f57f7d2190d9af3e57d67cfb004

    • SHA1

      2e783c279542ea1708854413a0cd725184f8fa78

    • SHA256

      f18e085889d9d7324c57ecb800563ba2e808c0ef8ad52b7b1f1f3afa169bf836

    • SHA512

      0f2509170c215efd58a09b4a00d593f087773da93f1877aab9b9f24474b06ad62494fa730fc435829a0365d7bd3d7440818a99e1b4c866882a0ed1cdc3eec9cb

    Score
    10/10
    servhelperbackdoordiscoveryexploitpersistencetrojanupx

    • ServHelper

      ServHelper is a backdoor written in Delphi and is associated with the hacking group TA505.

      trojanbackdoorservhelper

    • Grants admin privileges

      Uses net.exe to modify the user's privileges.

    • Blocklisted process makes network request

    • Executes dropped EXE

    • Modifies RDP port number used by Windows

    • Possible privilege escalation attempt

      exploit

    • Sets DLL path for service in the registry

      persistence

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

      upx

    • Deletes itself

    • Loads dropped DLL

    • Modifies file permissions

      discovery

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Account Manipulation

1
T1098

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Defense Evasion

Modify Registry

2
T1112

File Permissions Modification

1
T1222

Credential Access

Discovery

System Information Discovery

1
T1082

Remote System Discovery

1
T1018

Lateral Movement

Remote Desktop Protocol

1
T1076

Collection

Exfiltration

Command and Control

Impact

Tasks