xloader | 762dd852506aea16a7cd743a103dce8067bc4906cdd45843778e7c0602bcc142

General

Target

Original BL Invoice & Packing List pdf.exe
Size

1.2MB
MD5

32edc7a227ce30813c73756c2fdc90cd
SHA1

bcf54c69b988f72a819f15692f53f5eb839a4be7
SHA256

3f88232fbf581d4a628de3b80c624fdabea29d159917ef596fe13b2f49f8268e
SHA512

c97da96cd175f107538eae3a7eef076b24faf69721ab52a2d01b0a5b2c67f3140c2b8eef48d51a4b74334eac8f678116102705aff66cc127eef8c82693a9f989
SSDEEP

24576:aYNkCmS4OsBgo0q4wMZa3mK/vfW+t3leBsAU8:aEZoHMZa2K3P1eB

Score

10^/10

xloader c3sc discovery loader rat

Malware Config

Extracted

Family

xloader

Version

2.3

Campaign

c3sc

Decoy

vnye2037.com

adopttongling.com

miss-bim.com

ylyqrbii.icu

iregentos.info

teseipropiedades.com

jsprimer.com

keepminkowicz.com

7999399.com

bdgooddq.com

komovnrebi.com

politicalswim.com

justokaydrawings.com

eglidons.com

ici-voyant.com

thirstymarketing.com

viajesyturismo360.com

shadesofshadow.com

learnenglishinceret.com

notnotdown.club

Signatures

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

CustAttr .NET packer 1 IoCs

Detects CustAttr .NET packer in memory.

resource	yara_rule
behavioral1/memory/2200-3-0x0000000000290000-0x00000000002A2000-memory.dmp	CustAttr

Xloader payload 3 IoCs

rat

resource	yara_rule
behavioral1/memory/2196-14-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral1/memory/2196-18-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral1/memory/1804-25-0x00000000000E0000-0x0000000000109000-memory.dmp	xloader

Deletes itself 1 IoCs

pid	Process
2208	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2200 set thread context of 2196	2200	Original BL Invoice & Packing List pdf.exe	32
PID 2196 set thread context of 1260	2196	Original BL Invoice & Packing List pdf.exe	21
PID 1804 set thread context of 1260	1804	cmstp.exe	21

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Original BL Invoice & Packing List pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmstp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
2200	Original BL Invoice & Packing List pdf.exe
2200	Original BL Invoice & Packing List pdf.exe
2196	Original BL Invoice & Packing List pdf.exe
2196	Original BL Invoice & Packing List pdf.exe
1804	cmstp.exe
1804	cmstp.exe
1804	cmstp.exe
1804	cmstp.exe
1804	cmstp.exe
1804	cmstp.exe
1804	cmstp.exe
1804	cmstp.exe
1804	cmstp.exe
1804	cmstp.exe
1804	cmstp.exe
1804	cmstp.exe
1804	cmstp.exe
1804	cmstp.exe
1804	cmstp.exe
1804	cmstp.exe
1804	cmstp.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2196	Original BL Invoice & Packing List pdf.exe
2196	Original BL Invoice & Packing List pdf.exe
2196	Original BL Invoice & Packing List pdf.exe
1804	cmstp.exe
1804	cmstp.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2200	Original BL Invoice & Packing List pdf.exe
Token: SeDebugPrivilege	2196	Original BL Invoice & Packing List pdf.exe
Token: SeDebugPrivilege	1804	cmstp.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 2200 wrote to memory of 2548	2200	Original BL Invoice & Packing List pdf.exe	31
PID 2200 wrote to memory of 2548	2200	Original BL Invoice & Packing List pdf.exe	31
PID 2200 wrote to memory of 2548	2200	Original BL Invoice & Packing List pdf.exe	31
PID 2200 wrote to memory of 2548	2200	Original BL Invoice & Packing List pdf.exe	31
PID 2200 wrote to memory of 2196	2200	Original BL Invoice & Packing List pdf.exe	32
PID 2200 wrote to memory of 2196	2200	Original BL Invoice & Packing List pdf.exe	32
PID 2200 wrote to memory of 2196	2200	Original BL Invoice & Packing List pdf.exe	32
PID 2200 wrote to memory of 2196	2200	Original BL Invoice & Packing List pdf.exe	32
PID 2200 wrote to memory of 2196	2200	Original BL Invoice & Packing List pdf.exe	32
PID 2200 wrote to memory of 2196	2200	Original BL Invoice & Packing List pdf.exe	32
PID 2200 wrote to memory of 2196	2200	Original BL Invoice & Packing List pdf.exe	32
PID 1260 wrote to memory of 1804	1260	Explorer.EXE	33
PID 1260 wrote to memory of 1804	1260	Explorer.EXE	33
PID 1260 wrote to memory of 1804	1260	Explorer.EXE	33
PID 1260 wrote to memory of 1804	1260	Explorer.EXE	33
PID 1260 wrote to memory of 1804	1260	Explorer.EXE	33
PID 1260 wrote to memory of 1804	1260	Explorer.EXE	33
PID 1260 wrote to memory of 1804	1260	Explorer.EXE	33
PID 1804 wrote to memory of 2208	1804	cmstp.exe	34
PID 1804 wrote to memory of 2208	1804	cmstp.exe	34
PID 1804 wrote to memory of 2208	1804	cmstp.exe	34
PID 1804 wrote to memory of 2208	1804	cmstp.exe	34

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1260
- C:\Users\Admin\AppData\Local\Temp\Original BL Invoice & Packing List pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Original BL Invoice & Packing List pdf.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2200
- - C:\Users\Admin\AppData\Local\Temp\Original BL Invoice & Packing List pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\Original BL Invoice & Packing List pdf.exe"
    3⤵
    PID:2548
- - C:\Users\Admin\AppData\Local\Temp\Original BL Invoice & Packing List pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\Original BL Invoice & Packing List pdf.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2196
- C:\Windows\SysWOW64\cmstp.exe
  "C:\Windows\SysWOW64\cmstp.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1804
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\Original BL Invoice & Packing List pdf.exe"
    3⤵
    - Deletes itself
    - System Location Discovery: System Language Discovery
    PID:2208

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1260-21-0x0000000006740000-0x0000000006888000-memory.dmp

Filesize
1.3MB

Download
memory/1260-26-0x0000000006740000-0x0000000006888000-memory.dmp

Filesize
1.3MB

Download
memory/1804-25-0x00000000000E0000-0x0000000000109000-memory.dmp

Filesize
164KB

Download
memory/1804-24-0x0000000000480000-0x0000000000498000-memory.dmp

Filesize
96KB

Download
memory/1804-22-0x0000000000480000-0x0000000000498000-memory.dmp

Filesize
96KB

Download
memory/2196-18-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/2196-16-0x0000000000D70000-0x0000000001073000-memory.dmp

Filesize
3.0MB

Download
memory/2196-19-0x00000000000F0000-0x0000000000100000-memory.dmp

Filesize
64KB

Download
memory/2196-10-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/2196-14-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/2196-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2196-8-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/2200-15-0x0000000073C00000-0x00000000742EE000-memory.dmp

Filesize
6.9MB

Download
memory/2200-6-0x00000000051F0000-0x0000000005268000-memory.dmp

Filesize
480KB

Download
memory/2200-7-0x0000000000570000-0x00000000005A0000-memory.dmp

Filesize
192KB

Download
memory/2200-0-0x0000000073C0E000-0x0000000073C0F000-memory.dmp

Filesize
4KB

Download
memory/2200-5-0x0000000073C00000-0x00000000742EE000-memory.dmp

Filesize
6.9MB

Download
memory/2200-4-0x0000000073C0E000-0x0000000073C0F000-memory.dmp

Filesize
4KB

Download
memory/2200-3-0x0000000000290000-0x00000000002A2000-memory.dmp

Filesize
72KB

Download
memory/2200-2-0x0000000073C00000-0x00000000742EE000-memory.dmp

Filesize
6.9MB

Download
memory/2200-1-0x0000000000C30000-0x0000000000D64000-memory.dmp

Filesize
1.2MB

Download

Analysis

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