appdomain.exe

PuTTY suite

Simon Tatham

The executable appdomain.exe, “Command-line SCP/SFTP client” has been detected as malware by 4 anti-virus scanners. The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer, however the file is not signed with an authenticode signature from a trusted source. The file has been seen being downloaded from doc-08-8g-docs.googleusercontent.com. While running, it connects to the Internet address ip-178-216-201-8.e24cloud.com on port 530.
Publisher:
Simon Tatham

Product:
PuTTY suite

Description:
Command-line SCP/SFTP client

Version:
0.63.3.0

MD5:
09a652fe954b17c30a9dbae6db49837e

SHA-1:
287b12a9298effed0125874263056c54896f7c76

SHA-256:
9b90d82a698d42c1b6a3b9e9d20fea851075b44629befa0992f1b7da3108442d

Scanner detections:
4 / 68

Status:
Malware

Analysis date:
11/18/2017 9:39:22 AM UTC  (today)

Scan engine
Detection
Engine version

ESET NOD32
Win32/Injector.BULE (variant)
9.11166

Kaspersky
UDS:DangerousObject.Multi.Generic
14.0.0.2497

Malwarebytes
Trojan.Crypt
v2015.02.12.02

McAfee Web Gateway
BehavesLike.Win32.Downloader.cc
7.6856

File size:
124.6 KB (127,637 bytes)

Product version:
0.63.3.0

Copyright:
Copyright © 1997-2013 Simon Tatham.

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Language:
Language Neutral

Common path:
C:\users\{user}\appdata\roaming\appdomain.exe

File PE Metadata
Compilation timestamp:
10/6/2014 9:40:10 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
3072:gfM1BjoYNXoKDIJBXJP/75NL8Hu/8otJ8tnI/GlnGIk:cMMYNXqBBVNYuU9NlY

Entry address:
0x30B6

Entry point:
81, EC, 84, 01, 00, 00, 53, 55, 56, 33, DB, 57, 89, 5C, 24, 18, C7, 44, 24, 10, 90, 91, 40, 00, 89, 5C, 24, 20, C6, 44, 24, 14, 20, FF, 15, 34, 70, 40, 00, 68, 01, 80, 00, 00, FF, 15, 1C, 71, 40, 00, 53, FF, 15, 8C, 72, 40, 00, 6A, 09, A3, 98, 37, 42, 00, E8, A8, 2D, 00, 00, A3, E4, 36, 42, 00, 53, 8D, 44, 24, 38, 68, 60, 01, 00, 00, 50, 53, 68, 98, EC, 41, 00, FF, 15, 64, 71, 40, 00, 68, 80, 91, 40, 00, 68, E0, 2E, 42, 00, E8, 52, 2A, 00, 00, FF, 15, 20, 71, 40, 00, BD, 00, 90, 42, 00, 50, 55, E8, 40, 2A...
 
[+]

Entropy:
7.4110

Packer / compiler:
Nullsoft install system v2.x

Code size:
23 KB (23,552 bytes)

Startup File (User Run Once)
Registry location:
HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce

Name:
AppDomain

Command:
"C:\users\{user}\appdata\roaming\appdomain.exe"


The file appdomain.exe has been seen being distributed by the following URL.

The executing file has been seen to make the following network communication in live environments.

TCP:
Connects to ip-178-216-201-8.e24cloud.com  (178.216.201.8:530)

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