xloader | 2fad61e5630cde696d8ea57db27d521ed4ff87ae0c5e692c597171439ae6d01c

General

Target

vbc.exe
Size

283KB
MD5

3003d7f5f37555dda6aaedc46ebffb6e
SHA1

2fc3bfb42f58a9c1c6c9383015347b9c8935d14f
SHA256

2fad61e5630cde696d8ea57db27d521ed4ff87ae0c5e692c597171439ae6d01c
SHA512

c9df0576f1f92639c69c79cd230ce80a4b8606791e0be99660fb119e207ff894b6c10f31fbba70699dc7e296c8e061130e5eb765e2eef521e602a8918f32e050

Score

10^/10

xloader tn61 loader persistence rat suricata

Malware Config

Extracted

Family

xloader

Version

2.6

Campaign

tn61

Decoy

ryliehorrall.art

mesdco.net

street-art-ink.com

sepetcin.com

stilghar.com

hawaiipooltiles.com

fuerst-von-falkennest.com

totalvirtue.com

xdk0blc0tqy6a7.life

zootowngravel.com

kreditkarten-optionde.com

6888tlbb.xyz

albertakleekai.com

travelnurseinfofinder3.life

valleyinnswat.com

secure-remove-devices.com

digitalswamy.com

www112casinova.com

medifasttrd.com

distritoxermar.com

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

Xloader Payload 5 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1088-59-0x0000000000400000-0x000000000042B000-memory.dmp	xloader
behavioral1/memory/1088-60-0x000000000041F2C0-mapping.dmp	xloader
behavioral1/memory/1088-62-0x0000000000400000-0x000000000042B000-memory.dmp	xloader
behavioral1/memory/2020-70-0x0000000000080000-0x00000000000AB000-memory.dmp	xloader
behavioral1/memory/2020-74-0x0000000000080000-0x00000000000AB000-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:

raserver.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	raserver.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\U2KDNFGPFNI = "C:\\Program Files (x86)\\Vsxc\\gditt_tnhq8.exe"	raserver.exe

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Suspicious use of SetThreadContext 3 IoCs

Processes:

vbc.execvtres.exeraserver.exe

description	pid	process	target process
PID 1372 set thread context of 1088	1372	vbc.exe	cvtres.exe
PID 1088 set thread context of 1236	1088	cvtres.exe	Explorer.EXE
PID 2020 set thread context of 1236	2020	raserver.exe	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

raserver.exe

description ioc process

File opened for modification C:\Program Files (x86)\Vsxc\gditt_tnhq8.exe raserver.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Vsxc\gditt_tnhq8.exe	raserver.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

raserver.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-2277218442-1199762539-2004043321-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	raserver.exe

Suspicious behavior: EnumeratesProcesses 20 IoCs

Processes:

cvtres.exeraserver.exe

pid	process
1088	cvtres.exe
1088	cvtres.exe
2020	raserver.exe
2020	raserver.exe
2020	raserver.exe
2020	raserver.exe
2020	raserver.exe
2020	raserver.exe
2020	raserver.exe
2020	raserver.exe
2020	raserver.exe
2020	raserver.exe
2020	raserver.exe
2020	raserver.exe
2020	raserver.exe
2020	raserver.exe
2020	raserver.exe
2020	raserver.exe
2020	raserver.exe
2020	raserver.exe

Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

cvtres.exeraserver.exe

pid process

1088 cvtres.exe
1088 cvtres.exe
1088 cvtres.exe
2020 raserver.exe
2020 raserver.exe
2020 raserver.exe
2020 raserver.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

cvtres.exeraserver.exeExplorer.EXE

description pid process

Token: SeDebugPrivilege 1088 cvtres.exe
Token: SeDebugPrivilege 2020 raserver.exe
Token: SeShutdownPrivilege 1236 Explorer.EXE
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1236 Explorer.EXE
1236 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1236 Explorer.EXE
1236 Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	1088	cvtres.exe
Token: SeDebugPrivilege	2020	raserver.exe
Token: SeShutdownPrivilege	1236	Explorer.EXE

pid	process
1236	Explorer.EXE
1236	Explorer.EXE

pid	process
1236	Explorer.EXE
1236	Explorer.EXE

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

vbc.exeExplorer.EXEraserver.exe

description	pid	process	target process
PID 1372 wrote to memory of 1088	1372	vbc.exe	cvtres.exe
PID 1372 wrote to memory of 1088	1372	vbc.exe	cvtres.exe
PID 1372 wrote to memory of 1088	1372	vbc.exe	cvtres.exe
PID 1372 wrote to memory of 1088	1372	vbc.exe	cvtres.exe
PID 1372 wrote to memory of 1088	1372	vbc.exe	cvtres.exe
PID 1372 wrote to memory of 1088	1372	vbc.exe	cvtres.exe
PID 1372 wrote to memory of 1088	1372	vbc.exe	cvtres.exe
PID 1236 wrote to memory of 2020	1236	Explorer.EXE	raserver.exe
PID 1236 wrote to memory of 2020	1236	Explorer.EXE	raserver.exe
PID 1236 wrote to memory of 2020	1236	Explorer.EXE	raserver.exe
PID 1236 wrote to memory of 2020	1236	Explorer.EXE	raserver.exe
PID 2020 wrote to memory of 2000	2020	raserver.exe	cmd.exe
PID 2020 wrote to memory of 2000	2020	raserver.exe	cmd.exe
PID 2020 wrote to memory of 2000	2020	raserver.exe	cmd.exe
PID 2020 wrote to memory of 2000	2020	raserver.exe	cmd.exe
PID 2020 wrote to memory of 780	2020	raserver.exe	Firefox.exe
PID 2020 wrote to memory of 780	2020	raserver.exe	Firefox.exe
PID 2020 wrote to memory of 780	2020	raserver.exe	Firefox.exe
PID 2020 wrote to memory of 780	2020	raserver.exe	Firefox.exe
PID 2020 wrote to memory of 780	2020	raserver.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1236

C:\Users\Admin\AppData\Local\Temp\vbc.exe
"C:\Users\Admin\AppData\Local\Temp\vbc.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1372

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:1088

C:\Windows\SysWOW64\raserver.exe
"C:\Windows\SysWOW64\raserver.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:2020

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe"
3⤵
PID:2000

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:780

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scripting

1

T1064

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Scripting

1

T1064

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/1088-62-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/1088-57-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/1088-56-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/1088-59-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/1088-60-0x000000000041F2C0-mapping.dmp

Download
memory/1088-64-0x00000000002E0000-0x00000000002F1000-memory.dmp

Filesize
68KB

Download
memory/1088-63-0x0000000000970000-0x0000000000C73000-memory.dmp

Filesize
3.0MB

Download
memory/1236-73-0x0000000004130000-0x0000000004213000-memory.dmp

Filesize
908KB

Download
memory/1236-65-0x0000000006A70000-0x0000000006BD6000-memory.dmp

Filesize
1.4MB

Download
memory/1236-75-0x0000000004130000-0x0000000004213000-memory.dmp

Filesize
908KB

Download
memory/1372-55-0x00000000003B0000-0x00000000003E4000-memory.dmp

Filesize
208KB

Download
memory/1372-54-0x00000000008D0000-0x000000000091C000-memory.dmp

Filesize
304KB

Download
memory/2000-68-0x0000000000000000-mapping.dmp

Download
memory/2020-66-0x0000000000000000-mapping.dmp

Download
memory/2020-70-0x0000000000080000-0x00000000000AB000-memory.dmp

Filesize
172KB

Download
memory/2020-71-0x0000000002070000-0x0000000002373000-memory.dmp

Filesize
3.0MB

Download
memory/2020-72-0x00000000003C0000-0x0000000000450000-memory.dmp

Filesize
576KB

Download
memory/2020-69-0x0000000000AC0000-0x0000000000ADC000-memory.dmp

Filesize
112KB

Download
memory/2020-74-0x0000000000080000-0x00000000000AB000-memory.dmp

Filesize
172KB

Download
memory/2020-67-0x00000000763E1000-0x00000000763E3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads