MD5: 66998f1f881d0472fea91662ae8b7d3d
SHA1: eab2ba9bc76a1a7e01f797ff08289401d957c12e
SHA256: dc5b231e86f0cac49f172636cd66aec39b63a0358c1c88691eefc4204674f6ad
SSDeep: 12288:P1/aGLDCMNpNAkoSzZWD8ayX2MQCw7D0s4zQ65zvLRGS6vyb7Ty3XQ2g0g2uIEUp:P1/aGLDCM4D8ayGMRzQ65zvLRGS6vybI
Size: 740205 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: UPolyXv05_v6
Company: no certificate found
Created at: 2014-02-27 08:41:59
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):

%original file name%.exe:480
prnfj.exe:1192

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 %original file name%.exe:480 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

%Documents and Settings%\All Users\Application Data\Saaaalamm\Mira.h (537850 bytes)
%Documents and Settings%\All Users\Application Data\prnfj.exe (914498 bytes)

The process prnfj.exe:1192 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

C:\AUTOEXEC.BAT .exe (1452114 bytes)
C:\MSDOS.SYS .exe (1452114 bytes)
C:\IO.SYS .exe (1452114 bytes)
C:\boot.ini .exe (1452114 bytes)
%Documents and Settings% .exe (1452114 bytes)
C:\RECYCLER .exe (1452114 bytes)
C:\ntldr .exe (1452114 bytes)
C:\%original file name%.exe .exe (1452114 bytes)
C:\original .exe (1452114 bytes)
C:\totalcmd .exe (1452114 bytes)
C:\NTDETECT.COM .exe (1452114 bytes)
C:\System Volume Information .exe (1452114 bytes)
C:\CONFIG.SYS .exe (1452114 bytes)
C:\marker .exe (1452114 bytes)
%Program Files% .exe (1452114 bytes)
%WinDir% .exe (1452114 bytes)
C:\pagefile.sys .exe (1452114 bytes)

The Trojan deletes the following file(s):

C:\Mirax (0 bytes)
C:\Mirat (0 bytes)
C:\Mirau (0 bytes)
C:\Mirav (0 bytes)
C:\Miraw (0 bytes)
C:\Mirap (0 bytes)
C:\Miraq (0 bytes)
C:\Miram (0 bytes)
C:\Mirao (0 bytes)
C:\Mirai (0 bytes)
C:\Miraj (0 bytes)
C:\Mirak (0 bytes)
C:\Mirad (0 bytes)
C:\Mirae (0 bytes)
C:\Miraf (0 bytes)
C:\Miraa (0 bytes)

Registry activity

The process %original file name%.exe:480 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "A7 D6 9F 74 AB 79 47 B7 5E F5 47 89 C5 23 BC EB"

[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"

The process prnfj.exe:1192 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\prnfj.exe"

Dropped PE files

HOSTS file anomalies

No changes have been detected.

Rootkit activity

No anomalies have been detected.

Propagation

VersionInfo

No information is available.

PE Sections

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Total found: 1
686ae5b695ac42b6dcee54d9d78cf7c0

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\prnfj.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):
   

   %original file name%.exe:480
   prnfj.exe:1192

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

   %Documents and Settings%\All Users\Application Data\Saaaalamm\Mira.h (537850 bytes)
   %Documents and Settings%\All Users\Application Data\prnfj.exe (914498 bytes)
   C:\AUTOEXEC.BAT .exe (1452114 bytes)
   C:\MSDOS.SYS .exe (1452114 bytes)
   C:\IO.SYS .exe (1452114 bytes)
   C:\boot.ini .exe (1452114 bytes)
   %Documents and Settings% .exe (1452114 bytes)
   C:\RECYCLER .exe (1452114 bytes)
   C:\ntldr .exe (1452114 bytes)
   C:\%original file name%.exe .exe (1452114 bytes)
   C:\original .exe (1452114 bytes)
   C:\totalcmd .exe (1452114 bytes)
   C:\NTDETECT.COM .exe (1452114 bytes)
   C:\System Volume Information .exe (1452114 bytes)
   C:\CONFIG.SYS .exe (1452114 bytes)
   C:\marker .exe (1452114 bytes)
   %Program Files% .exe (1452114 bytes)
   %WinDir% .exe (1452114 bytes)
   C:\pagefile.sys .exe (1452114 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\prnfj.exe"

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