servhelper | aefb4a2472f0517d58cae7e5e0c9c51b4e36b39f6096dbffc6b8cc18d0be7175 | Triage

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Overview

overview

Static

static

3

211ca7c8d5...18.exe

windows7-x64

211ca7c8d5...18.exe

windows10-2004-x64

Sharing

General

Target

211ca7c8d5fd20f7dcaebdbe354662be_JaffaCakes118
Size

5.7MB
Sample

240329-nv62msfh7v
MD5

211ca7c8d5fd20f7dcaebdbe354662be
SHA1

1111e864f3e9d2e6879c5179c4136638b05b67c9
SHA256

aefb4a2472f0517d58cae7e5e0c9c51b4e36b39f6096dbffc6b8cc18d0be7175
SHA512

d7e6e638cdfd4792a09d671f4e61de715a63a9001283594e6c73d5a88dfc8b91d201fc19b1228b7b1a654f9abb8cf52893d3cc02aea142a1c5c7b9d3f876e24f
SSDEEP

49152:sr/U2Wrb/T/vO90dL3BmAFd4A64nsfJ1gBO55+1TEf1q7NOVuZnsm/QBrkdL+DLk:srDnOOWmAQQQQQQQQQQQQQ

Score

10^/10

servhelper backdoor discovery exploit persistence trojan upx

Static task

static1

1 signatures

Behavioral task

behavioral1

Sample

211ca7c8d5fd20f7dcaebdbe354662be_JaffaCakes118.exe

Resource

win7-20240221-en

servhelper backdoor discovery exploit persistence trojan upx

windows7-x64

20 signatures

150 seconds

Behavioral task

behavioral2

Sample

211ca7c8d5fd20f7dcaebdbe354662be_JaffaCakes118.exe

Resource

win10v2004-20231215-en

servhelper backdoor discovery exploit persistence trojan upx

windows10-2004-x64

22 signatures

150 seconds

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

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

Targets

- Target
  
  211ca7c8d5fd20f7dcaebdbe354662be_JaffaCakes118
- Size
  
  5.7MB
- MD5
  
  211ca7c8d5fd20f7dcaebdbe354662be
- SHA1
  
  1111e864f3e9d2e6879c5179c4136638b05b67c9
- SHA256
  
  aefb4a2472f0517d58cae7e5e0c9c51b4e36b39f6096dbffc6b8cc18d0be7175
- SHA512
  
  d7e6e638cdfd4792a09d671f4e61de715a63a9001283594e6c73d5a88dfc8b91d201fc19b1228b7b1a654f9abb8cf52893d3cc02aea142a1c5c7b9d3f876e24f
- SSDEEP
  
  49152:sr/U2Wrb/T/vO90dL3BmAFd4A64nsfJ1gBO55+1TEf1q7NOVuZnsm/QBrkdL+DLk:srDnOOWmAQQQQQQQQQQQQQ
Score

10^/10

servhelper backdoor discovery exploit persistence trojan upx
- ServHelper
  ServHelper is a backdoor written in Delphi and is associated with the hacking group TA505.
  trojan backdoor servhelper
- Grants admin privileges
  Uses net.exe to modify the user's privileges.
- Blocklisted process makes network request
- Modifies RDP port number used by Windows
- Possible privilege escalation attempt
  exploit
- Sets DLL path for service in the registry
  persistence
- Loads dropped DLL
- Modifies file permissions
  discovery
- UPX packed file
  Detects executables packed with UPX/modified UPX open source packer.
  upx
- Legitimate hosting services abused for malware hosting/C2
- Drops file in System32 directory
behavioral1 behavioral2

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Account Manipulation

Boot or Logon Autostart Execution

Registry Run Keys / Startup Folder

Privilege Escalation

Boot or Logon Autostart Execution

Registry Run Keys / Startup Folder

Defense Evasion

Modify Registry

File and Directory Permissions Modification

Credential Access

Discovery

System Information Discovery

Lateral Movement

Remote Services

Remote Desktop Protocol

Collection

Exfiltration

Command and Control

Web Service

Impact

Resource Development

Reconnaissance

Tasks

static1

behavioral1

servhelperbackdoordiscoveryexploitpersistencetrojanupx

behavioral2

servhelperbackdoordiscoveryexploitpersistencetrojanupx

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