xloader | 1bec941f244d3f69b90f2b3166509ccffdfb11959003f53c1ef097beaf4a0969

General

Target

vbc.exe
Size

303KB
MD5

bef72eb124931f8e96965b4e5062605c
SHA1

f2f7fb4c3c0d130dfec7ede1efa1b5187b759ede
SHA256

1bec941f244d3f69b90f2b3166509ccffdfb11959003f53c1ef097beaf4a0969
SHA512

3d8dd5304f53744a82ab9d01e98bdf776dab77507255f81c1a9d377c3a56c440a5c69b01de7dc7d24671a6b287b9a7cc9a57828ffa371b09f22ea0203ca4556a

Score

10^/10

xloader mt88 loader persistence rat spyware stealer suricata

Malware Config

Extracted

Family

xloader

Version

2.6

Campaign

mt88

Decoy

syzbf32.xyz

pertlines.com

vybaveniprocyklostezky.com

elianmsalas.tech

a-snag-tokei-kaitori.com

tuvistaing.com

whoyoucall.net

l8e9gr.xyz

sophrologuemontevrain77.com

ciclean.com

the-roel.com

campgreencove.com

foremostbookkeeping.com

zamanscorner.com

efeturozemniyet.com

penelope.team

murata.life

solfuls.com

tradefitinvesting.com

skinbid.pro

Signatures

Xloader
Xloader is a rebranded version of Formbook malware.
loader xloader
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata
suricata: ET MALWARE FormBook CnC Checkin (POST) M2
suricata: ET MALWARE FormBook CnC Checkin (POST) M2
suricata

Xloader Payload 4 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/1460-132-0x0000000000400000-0x000000000042B000-memory.dmp	xloader
behavioral2/memory/1460-138-0x0000000000400000-0x000000000042B000-memory.dmp	xloader
behavioral2/memory/4368-141-0x0000000000570000-0x000000000059B000-memory.dmp	xloader
behavioral2/memory/4368-146-0x0000000000570000-0x000000000059B000-memory.dmp	xloader

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

msdt.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	msdt.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\ZFAPDX8XUBO = "C:\\Program Files (x86)\\Y_td0\\t4_a0g.exe"	msdt.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Suspicious use of SetThreadContext 3 IoCs

Processes:

vbc.execvtres.exemsdt.exe

description	pid	process	target process
PID 3880 set thread context of 1460	3880	vbc.exe	cvtres.exe
PID 1460 set thread context of 2896	1460	cvtres.exe	Explorer.EXE
PID 4368 set thread context of 2896	4368	msdt.exe	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

msdt.exe

description ioc process

File opened for modification C:\Program Files (x86)\Y_td0\t4_a0g.exe msdt.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Y_td0\t4_a0g.exe	msdt.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

msdt.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-1081944012-3634099177-1681222835-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	msdt.exe

Suspicious behavior: EnumeratesProcesses 40 IoCs

Processes:

cvtres.exemsdt.exe

pid	process
1460	cvtres.exe
1460	cvtres.exe
1460	cvtres.exe
1460	cvtres.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe
4368	msdt.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

2896 Explorer.EXE
Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

cvtres.exemsdt.exe

pid process

1460 cvtres.exe
1460 cvtres.exe
1460 cvtres.exe
4368 msdt.exe
4368 msdt.exe
4368 msdt.exe
4368 msdt.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vbc.execvtres.exemsdt.exe

description pid process

Token: SeDebugPrivilege 3880 vbc.exe
Token: SeDebugPrivilege 1460 cvtres.exe
Token: SeDebugPrivilege 4368 msdt.exe

pid	process
2896	Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	3880	vbc.exe
Token: SeDebugPrivilege	1460	cvtres.exe
Token: SeDebugPrivilege	4368	msdt.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

vbc.exeExplorer.EXEmsdt.exe

description	pid	process	target process
PID 3880 wrote to memory of 1460	3880	vbc.exe	cvtres.exe
PID 3880 wrote to memory of 1460	3880	vbc.exe	cvtres.exe
PID 3880 wrote to memory of 1460	3880	vbc.exe	cvtres.exe
PID 3880 wrote to memory of 1460	3880	vbc.exe	cvtres.exe
PID 3880 wrote to memory of 1460	3880	vbc.exe	cvtres.exe
PID 3880 wrote to memory of 1460	3880	vbc.exe	cvtres.exe
PID 2896 wrote to memory of 4368	2896	Explorer.EXE	msdt.exe
PID 2896 wrote to memory of 4368	2896	Explorer.EXE	msdt.exe
PID 2896 wrote to memory of 4368	2896	Explorer.EXE	msdt.exe
PID 4368 wrote to memory of 112	4368	msdt.exe	cmd.exe
PID 4368 wrote to memory of 112	4368	msdt.exe	cmd.exe
PID 4368 wrote to memory of 112	4368	msdt.exe	cmd.exe
PID 4368 wrote to memory of 1508	4368	msdt.exe	cmd.exe
PID 4368 wrote to memory of 1508	4368	msdt.exe	cmd.exe
PID 4368 wrote to memory of 1508	4368	msdt.exe	cmd.exe
PID 4368 wrote to memory of 3804	4368	msdt.exe	cmd.exe
PID 4368 wrote to memory of 3804	4368	msdt.exe	cmd.exe
PID 4368 wrote to memory of 3804	4368	msdt.exe	cmd.exe
PID 4368 wrote to memory of 2784	4368	msdt.exe	Firefox.exe
PID 4368 wrote to memory of 2784	4368	msdt.exe	Firefox.exe
PID 4368 wrote to memory of 2784	4368	msdt.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:2896

C:\Users\Admin\AppData\Local\Temp\vbc.exe
"C:\Users\Admin\AppData\Local\Temp\vbc.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3880

C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1460

C:\Windows\SysWOW64\msdt.exe
"C:\Windows\SysWOW64\msdt.exe"
2⤵
- Adds policy Run key to start application
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4368

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe"
3⤵
PID:112

C:\Windows\SysWOW64\cmd.exe
/c copy "C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
3⤵
PID:1508

C:\Windows\SysWOW64\cmd.exe
/c copy "C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
3⤵
PID:3804

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:2784

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scripting

1

T1064

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

Scripting

Credential Access

Credentials in Files

1

T1081

Discovery

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\DB1

Filesize
40KB

MD5
b608d407fc15adea97c26936bc6f03f6

SHA1
953e7420801c76393902c0d6bb56148947e41571

SHA256
b281ce54125d4250a80f48fcc02a8eea53f2c35c3b726e2512c3d493da0013bf

SHA512
cc96ddf4bf90d6aaa9d86803cb2aa30cd8e9b295aee1bd5544b88aeab63dc60bb1d4641e846c9771bab51aabbfbcd984c6d3ee83b96f5b65d09c0841d464b9e4

Download Submit
C:\Users\Admin\AppData\Local\Temp\DB1

Filesize
48KB

MD5
349e6eb110e34a08924d92f6b334801d

SHA1
bdfb289daff51890cc71697b6322aa4b35ec9169

SHA256
c9fd7be4579e4aa942e8c2b44ab10115fa6c2fe6afd0c584865413d9d53f3b2a

SHA512
2a635b815a5e117ea181ee79305ee1baf591459427acc5210d8c6c7e447be3513ead871c605eb3d32e4ab4111b2a335f26520d0ef8c1245a4af44e1faec44574

Download Submit
memory/112-139-0x0000000000000000-mapping.dmp

Download
memory/1460-134-0x0000000001300000-0x000000000164A000-memory.dmp

Filesize
3.3MB

Download
memory/1460-135-0x0000000000DF0000-0x0000000000E01000-memory.dmp

Filesize
68KB

Download
memory/1460-138-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/1460-132-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/1460-131-0x0000000000000000-mapping.dmp

Download
memory/1508-148-0x0000000000000000-mapping.dmp

Download
memory/2896-136-0x0000000002AB0000-0x0000000002B8C000-memory.dmp

Filesize
880KB

Download
memory/2896-147-0x00000000080D0000-0x00000000081F8000-memory.dmp

Filesize
1.2MB

Download
memory/2896-143-0x0000000002AB0000-0x0000000002B8C000-memory.dmp

Filesize
880KB

Download
memory/2896-145-0x00000000080D0000-0x00000000081F8000-memory.dmp

Filesize
1.2MB

Download
memory/3804-150-0x0000000000000000-mapping.dmp

Download
memory/3880-130-0x0000000000BD0000-0x0000000000C22000-memory.dmp

Filesize
328KB

Download
memory/4368-142-0x0000000002790000-0x0000000002ADA000-memory.dmp

Filesize
3.3MB

Download
memory/4368-146-0x0000000000570000-0x000000000059B000-memory.dmp

Filesize
172KB

Download
memory/4368-144-0x0000000002530000-0x00000000025C0000-memory.dmp

Filesize
576KB

Download
memory/4368-141-0x0000000000570000-0x000000000059B000-memory.dmp

Filesize
172KB

Download
memory/4368-140-0x00000000000B0000-0x0000000000107000-memory.dmp

Filesize
348KB

Download
memory/4368-137-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads