xloader | 3085d62628657edccc65a18edda86f253fb86712a4e50b1cf67828bfa2d33e80

General

Target

Invoice pdf.exe
Size

680KB
MD5

3a91f6caa3965066b881d1de7a67f1b9
SHA1

6097fcf7687e0ec485eae2d57cf9b993ab520375
SHA256

3085d62628657edccc65a18edda86f253fb86712a4e50b1cf67828bfa2d33e80
SHA512

516b5704221bc49d607b80bafd6841976019f908869449c97f6a27c2840d43f62c76af2c5e464fb6b3f04079045b95883d3ed7fd684be1a269ec1663ba2b2dfb

Score

10^/10

xloader k8b5 loader rat

Malware Config

Extracted

Family

xloader

Version

2.3

Campaign

k8b5

C2

http://www.chongzhi365.com/k8b5/

Decoy

sardamedicals.com

reelectkendavis4council.com

coreconsultation.com

fajarazhary.com

mybitearner.com

brightpet.info

voicewithchoice.com

bailbondscompany.xyz

7133333333.com

delights.info

gawlvegdr.icu

sdqhpm.com

we2savvyok.com

primallifeathlete.com

gdsinglecell.com

isokineticmachines.com

smartneckrelax.com

gardenvintage.com

hiphopvolume.com

medicapoint.com

Signatures

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

Xloader Payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1072-66-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral1/memory/1072-67-0x000000000041D0B0-mapping.dmp	xloader
behavioral1/memory/1544-75-0x0000000000090000-0x00000000000B9000-memory.dmp	xloader

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1740 cmd.exe

pid	process
1740	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

Invoice pdf.exeInvoice pdf.exerundll32.exe

description	pid	process	target process
PID 2032 set thread context of 1072	2032	Invoice pdf.exe	Invoice pdf.exe
PID 1072 set thread context of 1268	1072	Invoice pdf.exe	Explorer.EXE
PID 1544 set thread context of 1268	1544	rundll32.exe	Explorer.EXE

Suspicious behavior: EnumeratesProcesses 19 IoCs

Processes:

Invoice pdf.exerundll32.exe

pid	process
1072	Invoice pdf.exe
1072	Invoice pdf.exe
1544	rundll32.exe
1544	rundll32.exe
1544	rundll32.exe
1544	rundll32.exe
1544	rundll32.exe
1544	rundll32.exe
1544	rundll32.exe
1544	rundll32.exe
1544	rundll32.exe
1544	rundll32.exe
1544	rundll32.exe
1544	rundll32.exe
1544	rundll32.exe
1544	rundll32.exe
1544	rundll32.exe
1544	rundll32.exe
1544	rundll32.exe

Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

Invoice pdf.exerundll32.exe

pid process

1072 Invoice pdf.exe
1072 Invoice pdf.exe
1072 Invoice pdf.exe
1544 rundll32.exe
1544 rundll32.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Invoice pdf.exerundll32.exe

description pid process

Token: SeDebugPrivilege 1072 Invoice pdf.exe
Token: SeDebugPrivilege 1544 rundll32.exe

description	pid	process
Token: SeDebugPrivilege	1072	Invoice pdf.exe
Token: SeDebugPrivilege	1544	rundll32.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

Invoice pdf.exeExplorer.EXErundll32.exe

description	pid	process	target process
PID 2032 wrote to memory of 1072	2032	Invoice pdf.exe	Invoice pdf.exe
PID 2032 wrote to memory of 1072	2032	Invoice pdf.exe	Invoice pdf.exe
PID 2032 wrote to memory of 1072	2032	Invoice pdf.exe	Invoice pdf.exe
PID 2032 wrote to memory of 1072	2032	Invoice pdf.exe	Invoice pdf.exe
PID 2032 wrote to memory of 1072	2032	Invoice pdf.exe	Invoice pdf.exe
PID 2032 wrote to memory of 1072	2032	Invoice pdf.exe	Invoice pdf.exe
PID 2032 wrote to memory of 1072	2032	Invoice pdf.exe	Invoice pdf.exe
PID 1268 wrote to memory of 1544	1268	Explorer.EXE	rundll32.exe
PID 1268 wrote to memory of 1544	1268	Explorer.EXE	rundll32.exe
PID 1268 wrote to memory of 1544	1268	Explorer.EXE	rundll32.exe
PID 1268 wrote to memory of 1544	1268	Explorer.EXE	rundll32.exe
PID 1268 wrote to memory of 1544	1268	Explorer.EXE	rundll32.exe
PID 1268 wrote to memory of 1544	1268	Explorer.EXE	rundll32.exe
PID 1268 wrote to memory of 1544	1268	Explorer.EXE	rundll32.exe
PID 1544 wrote to memory of 1740	1544	rundll32.exe	cmd.exe
PID 1544 wrote to memory of 1740	1544	rundll32.exe	cmd.exe
PID 1544 wrote to memory of 1740	1544	rundll32.exe	cmd.exe
PID 1544 wrote to memory of 1740	1544	rundll32.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1268
- C:\Users\Admin\AppData\Local\Temp\Invoice pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Invoice pdf.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:2032
- - C:\Users\Admin\AppData\Local\Temp\Invoice pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\Invoice pdf.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:1072
- C:\Windows\SysWOW64\rundll32.exe
  "C:\Windows\SysWOW64\rundll32.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1544
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\Invoice pdf.exe"
    3⤵
    - Deletes itself
    PID:1740

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

memory/1072-66-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/1072-67-0x000000000041D0B0-mapping.dmp

Download
memory/1072-69-0x00000000000B0000-0x00000000000C0000-memory.dmp

Filesize
64KB

Download
memory/1072-68-0x0000000000900000-0x0000000000C03000-memory.dmp

Filesize
3.0MB

Download
memory/1268-78-0x0000000006C20000-0x0000000006D99000-memory.dmp

Filesize
1.5MB

Download
memory/1268-70-0x0000000006010000-0x00000000060D3000-memory.dmp

Filesize
780KB

Download
memory/1544-74-0x0000000000520000-0x000000000052E000-memory.dmp

Filesize
56KB

Download
memory/1544-77-0x0000000001F40000-0x0000000001FCF000-memory.dmp

Filesize
572KB

Download
memory/1544-76-0x00000000020D0000-0x00000000023D3000-memory.dmp

Filesize
3.0MB

Download
memory/1544-75-0x0000000000090000-0x00000000000B9000-memory.dmp

Filesize
164KB

Download
memory/1544-71-0x0000000000000000-mapping.dmp

Download
memory/1544-72-0x0000000075AA1000-0x0000000075AA3000-memory.dmp

Filesize
8KB

Download
memory/1740-73-0x0000000000000000-mapping.dmp

Download
memory/2032-60-0x00000000012A0000-0x00000000012A1000-memory.dmp

Filesize
4KB

Download
memory/2032-65-0x00000000005C0000-0x00000000005EB000-memory.dmp

Filesize
172KB

Download
memory/2032-64-0x0000000004EA0000-0x0000000004F01000-memory.dmp

Filesize
388KB

Download
memory/2032-63-0x00000000003B0000-0x00000000003C6000-memory.dmp

Filesize
88KB

Download
memory/2032-62-0x0000000004E60000-0x0000000004E61000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads