xloader | 207dff33f6f91f114deae60a6cb3a404a5f40bc607fb6015f680c8980af7ac16

General

Target

Unpaid invoice.exe
Size

548KB
MD5

3ade5b9b508051cc39c1c610f4af5a12
SHA1

662056878a2b1fb1e99d1f74bb0e8694904fdccd
SHA256

207dff33f6f91f114deae60a6cb3a404a5f40bc607fb6015f680c8980af7ac16
SHA512

a99f9f23663bc09fca19a96968a15014679e8bbe2bb4a6f64897a34b86faf72848af138b4dbdcda1ef19d4e2488e81dc447c50af5e05f2c67cf7521b070c3d0f

Score

10^/10

xloader b6cu loader rat suricata

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
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata

Xloader Payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1908-67-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral1/memory/1908-68-0x000000000041D0B0-mapping.dmp	xloader
behavioral1/memory/240-76-0x0000000000090000-0x00000000000B9000-memory.dmp	xloader

Blocklisted process makes network request 1 IoCs

Processes:

cmstp.exe

flow pid process

12 240 cmstp.exe
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1700 cmd.exe

flow	pid	process
12	240	cmstp.exe

pid	process
1700	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

Unpaid invoice.exeUnpaid invoice.execmstp.exe

description	pid	process	target process
PID 1660 set thread context of 1908	1660	Unpaid invoice.exe	Unpaid invoice.exe
PID 1908 set thread context of 1220	1908	Unpaid invoice.exe	Explorer.EXE
PID 240 set thread context of 1220	240	cmstp.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

1532 schtasks.exe

pid	process
1532	schtasks.exe

Suspicious behavior: EnumeratesProcesses 27 IoCs

Processes:

Unpaid invoice.exeUnpaid invoice.execmstp.exe

pid	process
1660	Unpaid invoice.exe
1660	Unpaid invoice.exe
1660	Unpaid invoice.exe
1660	Unpaid invoice.exe
1908	Unpaid invoice.exe
1908	Unpaid invoice.exe
240	cmstp.exe
240	cmstp.exe
240	cmstp.exe
240	cmstp.exe
240	cmstp.exe
240	cmstp.exe
240	cmstp.exe
240	cmstp.exe
240	cmstp.exe
240	cmstp.exe
240	cmstp.exe
240	cmstp.exe
240	cmstp.exe
240	cmstp.exe
240	cmstp.exe
240	cmstp.exe
240	cmstp.exe
240	cmstp.exe
240	cmstp.exe
240	cmstp.exe
240	cmstp.exe

Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

Unpaid invoice.execmstp.exe

pid process

1908 Unpaid invoice.exe
1908 Unpaid invoice.exe
1908 Unpaid invoice.exe
240 cmstp.exe
240 cmstp.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

Unpaid invoice.exeUnpaid invoice.execmstp.exe

description pid process

Token: SeDebugPrivilege 1660 Unpaid invoice.exe
Token: SeDebugPrivilege 1908 Unpaid invoice.exe
Token: SeDebugPrivilege 240 cmstp.exe
Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

Explorer.EXE

pid process

1220 Explorer.EXE
1220 Explorer.EXE
1220 Explorer.EXE
1220 Explorer.EXE
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

Explorer.EXE

pid process

1220 Explorer.EXE
1220 Explorer.EXE
1220 Explorer.EXE
1220 Explorer.EXE

pid	process
1908	Unpaid invoice.exe
1908	Unpaid invoice.exe
1908	Unpaid invoice.exe
240	cmstp.exe
240	cmstp.exe

description	pid	process
Token: SeDebugPrivilege	1660	Unpaid invoice.exe
Token: SeDebugPrivilege	1908	Unpaid invoice.exe
Token: SeDebugPrivilege	240	cmstp.exe

pid	process
1220	Explorer.EXE
1220	Explorer.EXE
1220	Explorer.EXE
1220	Explorer.EXE

pid	process
1220	Explorer.EXE
1220	Explorer.EXE
1220	Explorer.EXE
1220	Explorer.EXE

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

Unpaid invoice.exeExplorer.EXEcmstp.exe

description	pid	process	target process
PID 1660 wrote to memory of 1532	1660	Unpaid invoice.exe	schtasks.exe
PID 1660 wrote to memory of 1532	1660	Unpaid invoice.exe	schtasks.exe
PID 1660 wrote to memory of 1532	1660	Unpaid invoice.exe	schtasks.exe
PID 1660 wrote to memory of 1532	1660	Unpaid invoice.exe	schtasks.exe
PID 1660 wrote to memory of 1488	1660	Unpaid invoice.exe	Unpaid invoice.exe
PID 1660 wrote to memory of 1488	1660	Unpaid invoice.exe	Unpaid invoice.exe
PID 1660 wrote to memory of 1488	1660	Unpaid invoice.exe	Unpaid invoice.exe
PID 1660 wrote to memory of 1488	1660	Unpaid invoice.exe	Unpaid invoice.exe
PID 1660 wrote to memory of 1908	1660	Unpaid invoice.exe	Unpaid invoice.exe
PID 1660 wrote to memory of 1908	1660	Unpaid invoice.exe	Unpaid invoice.exe
PID 1660 wrote to memory of 1908	1660	Unpaid invoice.exe	Unpaid invoice.exe
PID 1660 wrote to memory of 1908	1660	Unpaid invoice.exe	Unpaid invoice.exe
PID 1660 wrote to memory of 1908	1660	Unpaid invoice.exe	Unpaid invoice.exe
PID 1660 wrote to memory of 1908	1660	Unpaid invoice.exe	Unpaid invoice.exe
PID 1660 wrote to memory of 1908	1660	Unpaid invoice.exe	Unpaid invoice.exe
PID 1220 wrote to memory of 240	1220	Explorer.EXE	cmstp.exe
PID 1220 wrote to memory of 240	1220	Explorer.EXE	cmstp.exe
PID 1220 wrote to memory of 240	1220	Explorer.EXE	cmstp.exe
PID 1220 wrote to memory of 240	1220	Explorer.EXE	cmstp.exe
PID 1220 wrote to memory of 240	1220	Explorer.EXE	cmstp.exe
PID 1220 wrote to memory of 240	1220	Explorer.EXE	cmstp.exe
PID 1220 wrote to memory of 240	1220	Explorer.EXE	cmstp.exe
PID 240 wrote to memory of 1700	240	cmstp.exe	cmd.exe
PID 240 wrote to memory of 1700	240	cmstp.exe	cmd.exe
PID 240 wrote to memory of 1700	240	cmstp.exe	cmd.exe
PID 240 wrote to memory of 1700	240	cmstp.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:1220

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:1660

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\NBYchW" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC7A3.tmp"
3⤵
- Creates scheduled task(s)
PID:1532

C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe
"C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe"
3⤵
PID:1488

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:1908

C:\Windows\SysWOW64\cmstp.exe
"C:\Windows\SysWOW64\cmstp.exe"
2⤵
- Blocklisted process makes network request
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:240

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe"
3⤵
- Deletes itself
PID:1700

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/240-78-0x0000000001E20000-0x0000000001EAF000-memory.dmp

Filesize
572KB

Download
memory/240-75-0x0000000001FB0000-0x00000000022B3000-memory.dmp

Filesize
3.0MB

Download
memory/240-76-0x0000000000090000-0x00000000000B9000-memory.dmp

Filesize
164KB

Download
memory/240-74-0x00000000006E0000-0x00000000006F8000-memory.dmp

Filesize
96KB

Download
memory/240-73-0x00000000762C1000-0x00000000762C3000-memory.dmp

Filesize
8KB

Download
memory/240-72-0x0000000000000000-mapping.dmp

Download
memory/1220-71-0x0000000006340000-0x00000000064AF000-memory.dmp

Filesize
1.4MB

Download
memory/1220-79-0x0000000003E10000-0x0000000003EAF000-memory.dmp

Filesize
636KB

Download
memory/1532-66-0x0000000000000000-mapping.dmp

Download
memory/1660-65-0x00000000008C0000-0x00000000008EA000-memory.dmp

Filesize
168KB

Download
memory/1660-60-0x0000000000930000-0x0000000000931000-memory.dmp

Filesize
4KB

Download
memory/1660-64-0x0000000004890000-0x00000000048EE000-memory.dmp

Filesize
376KB

Download
memory/1660-63-0x0000000000260000-0x0000000000267000-memory.dmp

Filesize
28KB

Download
memory/1660-62-0x0000000004ED0000-0x0000000004ED1000-memory.dmp

Filesize
4KB

Download
memory/1700-77-0x0000000000000000-mapping.dmp

Download
memory/1908-70-0x0000000000160000-0x0000000000170000-memory.dmp

Filesize
64KB

Download
memory/1908-69-0x0000000000B50000-0x0000000000E53000-memory.dmp

Filesize
3.0MB

Download
memory/1908-68-0x000000000041D0B0-mapping.dmp

Download
memory/1908-67-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads