MD5: 4b07b5f5e91dc358eb018a745ea78568
SHA1: 796a0efd12b76b8274ec82d864d8a39f0fc04a08
SHA256: a5eb1050e6a1778eea1b157e6707990e50f99290bacb9a3e6d09e5fc0291f948
SSDeep: 24576:/1/aGLDCM4D8ayGMZo8/ /iiZHTLkAUZRRanIvjLtBZ2TzJR:wD8ayGMZoVXTLkAUZRRanIvjLtBEZR
Size: 1010905 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: UPolyXv05_v6
Company: Software Assistant
Created at: no data
Analyzed on: WindowsXP SP3 32-bit

Summary:

Trojan. A program that appears to do one thing but actually does another (a.k.a. Trojan Horse).

Payload

No specific payload has been found.

Process activity

The Trojan creates the following process(es):

uyiaus.exe:1880
%original file name%.exe:2016

The Trojan injects its code into the following process(es):
No processes have been created.

Mutexes

The following mutexes were created/opened:
No objects were found.

File activity

The process uyiaus.exe:1880 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

C:\AUTOEXEC.BAT .exe (1963130 bytes)
C:\MSDOS.SYS .exe (1963130 bytes)
C:\IO.SYS .exe (1963130 bytes)
C:\%original file name%.exe .exe (1963130 bytes)
C:\boot.ini .exe (1963130 bytes)
%Documents and Settings% .exe (1963130 bytes)
C:\RECYCLER .exe (1963130 bytes)
C:\ntldr .exe (1963130 bytes)
C:\original .exe (1963130 bytes)
C:\totalcmd .exe (1963130 bytes)
C:\NTDETECT.COM .exe (1963130 bytes)
C:\System Volume Information .exe (1963130 bytes)
C:\CONFIG.SYS .exe (1963130 bytes)
C:\marker .exe (1963130 bytes)
%Program Files% .exe (1963130 bytes)
%WinDir% .exe (1963130 bytes)
C:\pagefile.sys .exe (1963130 bytes)

The Trojan deletes the following file(s):

C:\Mirax (0 bytes)
C:\Miray (0 bytes)
C:\Mirat (0 bytes)
C:\Miraq (0 bytes)
C:\Mirar (0 bytes)
C:\Miras (0 bytes)
C:\Miral (0 bytes)
C:\Miran (0 bytes)
C:\Mirao (0 bytes)
C:\Mirai (0 bytes)
C:\Mirak (0 bytes)
C:\Mirad (0 bytes)
C:\Miraf (0 bytes)
C:\Mirag (0 bytes)
C:\Miraa (0 bytes)
C:\Mirac (0 bytes)

The process %original file name%.exe:2016 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

%Documents and Settings%\All Users\Application Data\uyiaus.exe (1018898 bytes)
%Documents and Settings%\All Users\Application Data\Saaaalamm\Mira.h (960207 bytes)

Registry activity

The process uyiaus.exe:1880 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common AppData" = "%Documents and Settings%\All Users\Application Data"

To automatically run itself each time Windows is booted, the Trojan adds the following link to its file to the system registry autorun key:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"Microsoft® Windows® Operating System" = "%Documents and Settings%\All Users\Application Data\uyiaus.exe"

The process %original file name%.exe:2016 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "83 B5 3C F3 04 8D 42 39 0D 2B B9 EB 72 CD 53 DE"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd73-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd72-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common AppData" = "%Documents and Settings%\All Users\Application Data"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{b98117e8-75ca-11e2-81b2-000c293708fb}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

Dropped PE files

HOSTS file anomalies

No changes have been detected.

Rootkit activity

No anomalies have been detected.

Propagation

VersionInfo

Company Name: Microsoft Corporation
Product Name: Mira Malware
Product Version: 1.0.0.155
Legal Copyright: Microsoft Corporation
Legal Trademarks:
Original Filename:
Internal Name:
File Version: 1.0.0.155
File Description: Mira Malware
Comments:
Language: Chinese (Simplified, PRC)

PE Sections

Dropped from:

9d453cdaf2c78129a691d5e110325c51

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

URLs

No activity has been detected.

IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

Web Traffic was not found.

The Trojan connects to the servers at the folowing location(s):

.text

`.data

.rdata

@.bss

.idata

%Documents and Settings%\All Users\Application Data\uyiaus.exe

Software\Microsoft\Windows\CurrentVersion\Run

Windows

Operating System

%H:%M:%S

%m/%d/%y

-0123456789

%s:%u: failed assertion `%s'

RegCloseKey

RegOpenKeyA

ADVAPI32.DLL

KERNEL32.dll

msvcrt.dll

SHELL32.DLL

Remove it with Ad-Aware

1. Click (here) to download and install Ad-Aware Free Antivirus.
2. Update the definition files.
3. Run a full scan of your computer.

Manual removal*

1. Terminate malicious process(es) (How to End a Process With the Task Manager):
   

   uyiaus.exe:1880
   %original file name%.exe:2016

2. Delete the original Trojan file.
   
3. Delete or disinfect the following files created/modified by the Trojan:
   

   C:\AUTOEXEC.BAT .exe (1963130 bytes)
   C:\MSDOS.SYS .exe (1963130 bytes)
   C:\IO.SYS .exe (1963130 bytes)
   C:\%original file name%.exe .exe (1963130 bytes)
   C:\boot.ini .exe (1963130 bytes)
   %Documents and Settings% .exe (1963130 bytes)
   C:\RECYCLER .exe (1963130 bytes)
   C:\ntldr .exe (1963130 bytes)
   C:\original .exe (1963130 bytes)
   C:\totalcmd .exe (1963130 bytes)
   C:\NTDETECT.COM .exe (1963130 bytes)
   C:\System Volume Information .exe (1963130 bytes)
   C:\CONFIG.SYS .exe (1963130 bytes)
   C:\marker .exe (1963130 bytes)
   %Program Files% .exe (1963130 bytes)
   %WinDir% .exe (1963130 bytes)
   C:\pagefile.sys .exe (1963130 bytes)
   %Documents and Settings%\All Users\Application Data\uyiaus.exe (1018898 bytes)
   %Documents and Settings%\All Users\Application Data\Saaaalamm\Mira.h (960207 bytes)

4. Delete the following value(s) in the autorun key (How to Work with System Registry):
   

   [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   "Microsoft® Windows® Operating System" = "%Documents and Settings%\All Users\Application Data\uyiaus.exe"

*Manual removal may cause unexpected system behaviour and should be performed at your own risk.