xloader | 207dff33f6f91f114deae60a6cb3a404a5f40bc607fb6015f680c8980af7ac16

General

Target

Unpaid invoice.exe
Size

548KB
MD5

3ade5b9b508051cc39c1c610f4af5a12
SHA1

662056878a2b1fb1e99d1f74bb0e8694904fdccd
SHA256

207dff33f6f91f114deae60a6cb3a404a5f40bc607fb6015f680c8980af7ac16
SHA512

a99f9f23663bc09fca19a96968a15014679e8bbe2bb4a6f64897a34b86faf72848af138b4dbdcda1ef19d4e2488e81dc447c50af5e05f2c67cf7521b070c3d0f

Score

10^/10

xloader b6cu loader rat

Malware Config

Extracted

Family

xloader

Version

2.3

Campaign

b6cu

C2

http://www.allfyllofficial.com/b6cu/

Decoy

sxdiyan.com

web0084.com

cpafirmspokane.com

la-bio-geo.com

chacrit.com

stuntfighting.com

rjsworkshop.com

themillennialsfinest.com

thefrontrealestate.com

chairmn.com

best1korea.com

gudssutu.icu

backupchip.net

shrikanthamimports.com

sportrecoverysleeve.com

healthy-shack.com

investperwear.com

intertradeperu.com

resonantonshop.com

greghugheslaw.com

Signatures

Xloader
Xloader is a rebranded version of Formbook malware.
loader xloader

Xloader Payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/608-68-0x000000000041D0B0-mapping.dmp	xloader
behavioral1/memory/608-67-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral1/memory/1360-78-0x00000000000D0000-0x00000000000F9000-memory.dmp	xloader

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1660 cmd.exe

pid	process
1660	cmd.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

Unpaid invoice.exeUnpaid invoice.exemsdt.exe

description	pid	process	target process
PID 1812 set thread context of 608	1812	Unpaid invoice.exe	Unpaid invoice.exe
PID 608 set thread context of 1212	608	Unpaid invoice.exe	Explorer.EXE
PID 608 set thread context of 1212	608	Unpaid invoice.exe	Explorer.EXE
PID 1360 set thread context of 1212	1360	msdt.exe	Explorer.EXE

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

1620 schtasks.exe

pid	process
1620	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

Unpaid invoice.exeUnpaid invoice.exemsdt.exe

pid	process
1812	Unpaid invoice.exe
1812	Unpaid invoice.exe
608	Unpaid invoice.exe
608	Unpaid invoice.exe
608	Unpaid invoice.exe
1360	msdt.exe
1360	msdt.exe
1360	msdt.exe
1360	msdt.exe
1360	msdt.exe
1360	msdt.exe
1360	msdt.exe
1360	msdt.exe
1360	msdt.exe
1360	msdt.exe
1360	msdt.exe
1360	msdt.exe
1360	msdt.exe
1360	msdt.exe
1360	msdt.exe
1360	msdt.exe
1360	msdt.exe
1360	msdt.exe

Suspicious behavior: MapViewOfSection 6 IoCs

Processes:

Unpaid invoice.exemsdt.exe

pid process

608 Unpaid invoice.exe
608 Unpaid invoice.exe
608 Unpaid invoice.exe
608 Unpaid invoice.exe
1360 msdt.exe
1360 msdt.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

Unpaid invoice.exeUnpaid invoice.exemsdt.exe

description pid process

Token: SeDebugPrivilege 1812 Unpaid invoice.exe
Token: SeDebugPrivilege 608 Unpaid invoice.exe
Token: SeDebugPrivilege 1360 msdt.exe
Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

Explorer.EXE

pid process

1212 Explorer.EXE
1212 Explorer.EXE
1212 Explorer.EXE
1212 Explorer.EXE
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

Explorer.EXE

pid process

1212 Explorer.EXE
1212 Explorer.EXE
1212 Explorer.EXE
1212 Explorer.EXE

pid	process
608	Unpaid invoice.exe
608	Unpaid invoice.exe
608	Unpaid invoice.exe
608	Unpaid invoice.exe
1360	msdt.exe
1360	msdt.exe

description	pid	process
Token: SeDebugPrivilege	1812	Unpaid invoice.exe
Token: SeDebugPrivilege	608	Unpaid invoice.exe
Token: SeDebugPrivilege	1360	msdt.exe

pid	process
1212	Explorer.EXE
1212	Explorer.EXE
1212	Explorer.EXE
1212	Explorer.EXE

pid	process
1212	Explorer.EXE
1212	Explorer.EXE
1212	Explorer.EXE
1212	Explorer.EXE

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

Unpaid invoice.exeExplorer.EXEmsdt.exe

description	pid	process	target process
PID 1812 wrote to memory of 1620	1812	Unpaid invoice.exe	schtasks.exe
PID 1812 wrote to memory of 1620	1812	Unpaid invoice.exe	schtasks.exe
PID 1812 wrote to memory of 1620	1812	Unpaid invoice.exe	schtasks.exe
PID 1812 wrote to memory of 1620	1812	Unpaid invoice.exe	schtasks.exe
PID 1812 wrote to memory of 608	1812	Unpaid invoice.exe	Unpaid invoice.exe
PID 1812 wrote to memory of 608	1812	Unpaid invoice.exe	Unpaid invoice.exe
PID 1812 wrote to memory of 608	1812	Unpaid invoice.exe	Unpaid invoice.exe
PID 1812 wrote to memory of 608	1812	Unpaid invoice.exe	Unpaid invoice.exe
PID 1812 wrote to memory of 608	1812	Unpaid invoice.exe	Unpaid invoice.exe
PID 1812 wrote to memory of 608	1812	Unpaid invoice.exe	Unpaid invoice.exe
PID 1812 wrote to memory of 608	1812	Unpaid invoice.exe	Unpaid invoice.exe
PID 1212 wrote to memory of 1360	1212	Explorer.EXE	msdt.exe
PID 1212 wrote to memory of 1360	1212	Explorer.EXE	msdt.exe
PID 1212 wrote to memory of 1360	1212	Explorer.EXE	msdt.exe
PID 1212 wrote to memory of 1360	1212	Explorer.EXE	msdt.exe
PID 1360 wrote to memory of 1660	1360	msdt.exe	cmd.exe
PID 1360 wrote to memory of 1660	1360	msdt.exe	cmd.exe
PID 1360 wrote to memory of 1660	1360	msdt.exe	cmd.exe
PID 1360 wrote to memory of 1660	1360	msdt.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1212

C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe
"C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1812

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\NBYchW" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC62C.tmp"
3⤵
- Creates scheduled task(s)
PID:1620

C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe
"C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:608

C:\Windows\SysWOW64\msdt.exe
"C:\Windows\SysWOW64\msdt.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1360

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe"
3⤵
- Deletes itself
PID:1660

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/608-69-0x0000000000820000-0x0000000000B23000-memory.dmp

Filesize
3.0MB

Download
memory/608-70-0x0000000000080000-0x0000000000090000-memory.dmp

Filesize
64KB

Download
memory/608-72-0x0000000000220000-0x0000000000230000-memory.dmp

Filesize
64KB

Download
memory/608-67-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/608-68-0x000000000041D0B0-mapping.dmp

Download
memory/1212-81-0x00000000067B0000-0x00000000068D3000-memory.dmp

Filesize
1.1MB

Download
memory/1212-71-0x0000000003E20000-0x0000000003EFF000-memory.dmp

Filesize
892KB

Download
memory/1212-73-0x0000000004F40000-0x00000000050BA000-memory.dmp

Filesize
1.5MB

Download
memory/1360-77-0x00000000008F0000-0x00000000009E4000-memory.dmp

Filesize
976KB

Download
memory/1360-78-0x00000000000D0000-0x00000000000F9000-memory.dmp

Filesize
164KB

Download
memory/1360-75-0x0000000075801000-0x0000000075803000-memory.dmp

Filesize
8KB

Download
memory/1360-79-0x0000000002220000-0x0000000002523000-memory.dmp

Filesize
3.0MB

Download
memory/1360-80-0x0000000001F50000-0x0000000001FDF000-memory.dmp

Filesize
572KB

Download
memory/1360-74-0x0000000000000000-mapping.dmp

Download
memory/1620-66-0x0000000000000000-mapping.dmp

Download
memory/1660-76-0x0000000000000000-mapping.dmp

Download
memory/1812-60-0x0000000000D40000-0x0000000000D41000-memory.dmp

Filesize
4KB

Download
memory/1812-65-0x0000000004690000-0x00000000046BA000-memory.dmp

Filesize
168KB

Download
memory/1812-64-0x00000000051F0000-0x000000000524E000-memory.dmp

Filesize
376KB

Download
memory/1812-63-0x00000000003F0000-0x00000000003F7000-memory.dmp

Filesize
28KB

Download
memory/1812-62-0x0000000004BD0000-0x0000000004BD1000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads