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b4f753.exe

The executable b4f753.exe has been detected as malware by 29 anti-virus scanners. It is set to automatically execute when any user logs into Windows (through the local user run registry setting) with the name ‘B4F753’.
MD5:
d3be3c03effa154119776bd87f61a66d

SHA-1:
f19038ecda66d6244bdb2152cfc231d16d3693fd

SHA-256:
e2ae14a31ce164cf0b0cca1758b811691dc3156d2861fdb57279f52729cbfb37

Scanner detections:
29 / 68

Status:
Malware

Analysis date:
11/27/2024 4:51:19 AM UTC  (today)

Scan engine
Detection
Engine version

AhnLab V3 Security
Win32/Flystudio.worm.Gen
2010.07.18

Avira AntiVirus
DR/Drop.Flystud.YO.37
8.2.4.12

Emsisoft A-Squared
Worm.Win32.FlyStudio!IK
5.0.0.31

avast!
Win32:EvilEPL
2014.9-160307

AVG
Generic_c
2017.0.2812

Bitdefender
Dropped:Trojan.Generic.3434016
1.0.20.335

Clam AntiVirus
Trojan.Dropper-21706
0.98/170.3

Comodo Security
UnclassifiedMalware
5470

ESET NOD32
Win32/AutoRun.FlyStudio.SR
10.5289

Fortinet FortiGate
W32/Autorun.YO!tr
3/7/2016

F-Prot
W32/Nuj.A.gen
v6.4.6.1.107

F-Secure
Trojan-Dropper:W32/Peed.gen!A
11.2016-07-03_2

G Data
Dropped:Trojan.Generic.3434016
16.3.21

IKARUS anti.virus
Worm.Win32.FlyStudio
t3scan.1.1.84.0

Kaspersky
Trojan-Dropper.Win32.Flystud
14.0.0.555

McAfee
W32/Autorun.worm.ev
5600.6468

Microsoft Security Essentials
Backdoor:Win32/FlyAgent.F
1.163.1557.0

Norman
W32/Tibs.DMZR
11.20160307

nProtect
Trojan/W32.Agent.1403688.B
10.07.18.02

Panda Antivirus
Bck/Wutau.B
16.03.07.01

Prevx
P2P Share High Risk Worm
3.0

Quick Heal
Win32.Trojan-Dropper.Flystud.ko.5.Pack
3.16.11.00

Rising Antivirus
Trojan.Win32.ECode.ee
23.00.65.16305

Sophos
Mal/EncPk-NB
4.55

SUPERAntiSpyware
Trojan.Agent/Gen-Fly[Large]
9281

Trend Micro House Call
WORM_AUTORUN.SMW
7.2.67

Trend Micro
WORM_AUTORUN.SMW
10.465.07

Vba32 AntiVirus
Trojan-Downloader.Win32.FlyStudio.fw
3.12.12.6

ViRobot
Dropper.Flystud.1403688.A
2010.7.12.3932

File size:
1.3 MB (1,403,688 bytes)

File type:
Executable application (Win32 EXE)

Common path:
C:\Windows\System32\e95257\b4f753.exe

File PE Metadata
Compilation timestamp:
12/25/1972 12:33:23 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
4.0

CTPH (ssdeep):
24576:sQ6gEgFzbRprd7Go/UpQplveJayUb2nWNNP/2i6YCc:sf4XxLXPh72nCNP/2tXc

Entry address:
0x140A

Entry point:
50, 56, 57, 52, 83, CF, 4C, 53, 51, 0F, 85, 50, FF, FF, FF, CC, 23, 59, 84, 89, DD, B2, 5B, 6F, 56, 6A, 11, AC, D0, F6, 62, BF, DD, 2A, DC, 34, 56, 01, 5B, 6F, 5A, E6, E1, 96, 3E, 73, DB, FE, D3, D2, 2C, BD, 52, E7, 5C, 6C, C6, F5, DA, 6E, A5, 37, 28, 94, A6, E7, D7, AB, D5, AB, E0, 06, AA, 72, CB, 2D, 40, E8, D7, EB, 52, 5B, 1C, 37, A2, EB, DA, 7E, DD, 2F, E0, 2E, 4B, E8, 55, E3, DD, E9, DA, 6E, DD, 61, DC, D6, 21, 39, 5B, 9B, 5A, B8, C7, 2F, 14, F0, 0A, 75, D5, E6, D8, 1F, 6D, 4D, 63, B6, D5, A9, DA, A2...
 
[+]

Code size:
24 KB (24,576 bytes)

Startup File (All Users Run)
Registry location:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

Name:
B4F753

Command:
C:\Windows\System32\e95257\b4f753.exe


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

TCP (HTTP):
Connects to ec2-52-0-217-44.compute-1.amazonaws.com  (52.0.217.44:80)

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