xloader | 0a01299cae838e8920ce78f846e94890d3a08619316aacfe34f9deb0b364d69c

Analysis

max time kernel
145s
max time network
120s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
21-08-2024 01:03

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General

Target

$PLUGINSDIR/fzltxxnfffs.dll
Size

194KB
MD5

c1ee8fc3cb583c07338524ac89801344
SHA1

041872fd3d00b10c7983f641be1e579bb709e6b7
SHA256

2b1efdc452245df048688e006a8d7c103e5ec369cab07125060161752ea6d8b6
SHA512

bd59b363d5c6e01a5f92e17f3c8c86eda4793a7ca53fa062aa80632fdb2130df527991ceb3ac6f73edd09e22a8e71968d0b7ad6e50fb7a7f2f9ed417f82f0190
SSDEEP

6144:ZUtJEr7mQNzZ/vDXqxnfNahvFp1cck4X3rm6v:ZnCYFD6TG9pjni6v

Score

10^/10

xloader pnug discovery loader rat

Malware Config

Extracted

Family

xloader

Version

2.5

Campaign

pnug

Decoy

natureate.com

ita-pots.website

sucohansmushroom.com

produrielrosen.com

gosystemupdatenow.online

jiskra.art

janwiench.com

norfolkfoodhall.com

iloveaddictss.com

pogozip.com

buyinstapva.com

teardirectionfreedom.xyz

0205168.com

apaixonadosporpugs.online

jawscoinc.com

crafter.quest

wikipedianow.com

radiopuls.net

kendama-co.com

goodstudycanada.com

Signatures

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

Xloader payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral3/memory/2528-2-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral3/memory/2528-5-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral3/memory/2060-10-0x00000000000D0000-0x00000000000F9000-memory.dmp	xloader

Suspicious use of SetThreadContext 3 IoCs

Processes:

rundll32.exerundll32.execmstp.exe

description	pid	Process	procid_target
PID 1916 set thread context of 2528	1916	rundll32.exe	31
PID 2528 set thread context of 1212	2528	rundll32.exe	21
PID 2060 set thread context of 1212	2060	cmstp.exe	21

System Location Discovery: System Language Discovery 1 TTPs 4 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

Processes:

rundll32.exerundll32.execmstp.execmd.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.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 31 IoCs

Processes:

rundll32.execmstp.exe

pid	Process
2528	rundll32.exe
2528	rundll32.exe
2060	cmstp.exe
2060	cmstp.exe
2060	cmstp.exe
2060	cmstp.exe
2060	cmstp.exe
2060	cmstp.exe
2060	cmstp.exe
2060	cmstp.exe
2060	cmstp.exe
2060	cmstp.exe
2060	cmstp.exe
2060	cmstp.exe
2060	cmstp.exe
2060	cmstp.exe
2060	cmstp.exe
2060	cmstp.exe
2060	cmstp.exe
2060	cmstp.exe
2060	cmstp.exe
2060	cmstp.exe
2060	cmstp.exe
2060	cmstp.exe
2060	cmstp.exe
2060	cmstp.exe
2060	cmstp.exe
2060	cmstp.exe
2060	cmstp.exe
2060	cmstp.exe
2060	cmstp.exe

Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

rundll32.execmstp.exe

pid	Process
2528	rundll32.exe
2528	rundll32.exe
2528	rundll32.exe
2060	cmstp.exe
2060	cmstp.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

rundll32.execmstp.exe

description	pid	Process
Token: SeDebugPrivilege	2528	rundll32.exe
Token: SeDebugPrivilege	2060	cmstp.exe

Suspicious use of WriteProcessMemory 28 IoCs

Processes:

rundll32.exerundll32.exeExplorer.EXEcmstp.exe

description	pid	Process	procid_target
PID 2972 wrote to memory of 1916	2972	rundll32.exe	30
PID 2972 wrote to memory of 1916	2972	rundll32.exe	30
PID 2972 wrote to memory of 1916	2972	rundll32.exe	30
PID 2972 wrote to memory of 1916	2972	rundll32.exe	30
PID 2972 wrote to memory of 1916	2972	rundll32.exe	30
PID 2972 wrote to memory of 1916	2972	rundll32.exe	30
PID 2972 wrote to memory of 1916	2972	rundll32.exe	30
PID 1916 wrote to memory of 2528	1916	rundll32.exe	31
PID 1916 wrote to memory of 2528	1916	rundll32.exe	31
PID 1916 wrote to memory of 2528	1916	rundll32.exe	31
PID 1916 wrote to memory of 2528	1916	rundll32.exe	31
PID 1916 wrote to memory of 2528	1916	rundll32.exe	31
PID 1916 wrote to memory of 2528	1916	rundll32.exe	31
PID 1916 wrote to memory of 2528	1916	rundll32.exe	31
PID 1916 wrote to memory of 2528	1916	rundll32.exe	31
PID 1916 wrote to memory of 2528	1916	rundll32.exe	31
PID 1916 wrote to memory of 2528	1916	rundll32.exe	31
PID 1212 wrote to memory of 2060	1212	Explorer.EXE	32
PID 1212 wrote to memory of 2060	1212	Explorer.EXE	32
PID 1212 wrote to memory of 2060	1212	Explorer.EXE	32
PID 1212 wrote to memory of 2060	1212	Explorer.EXE	32
PID 1212 wrote to memory of 2060	1212	Explorer.EXE	32
PID 1212 wrote to memory of 2060	1212	Explorer.EXE	32
PID 1212 wrote to memory of 2060	1212	Explorer.EXE	32
PID 2060 wrote to memory of 2164	2060	cmstp.exe	33
PID 2060 wrote to memory of 2164	2060	cmstp.exe	33
PID 2060 wrote to memory of 2164	2060	cmstp.exe	33
PID 2060 wrote to memory of 2164	2060	cmstp.exe	33

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1212
- C:\Windows\system32\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\fzltxxnfffs.dll,#1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2972
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\fzltxxnfffs.dll,#1
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1916
  - - C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\fzltxxnfffs.dll,#1
      4⤵
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of AdjustPrivilegeToken
      PID:2528
- 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:2060
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\SysWOW64\rundll32.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2164

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1212-7-0x00000000051A0000-0x00000000052F7000-memory.dmp

Filesize
1.3MB

Download
memory/1212-11-0x00000000051A0000-0x00000000052F7000-memory.dmp

Filesize
1.3MB

Download
memory/1916-1-0x00000000000F0000-0x0000000000130000-memory.dmp

Filesize
256KB

Download
memory/2060-9-0x0000000000F10000-0x0000000000F28000-memory.dmp

Filesize
96KB

Download
memory/2060-8-0x0000000000F10000-0x0000000000F28000-memory.dmp

Filesize
96KB

Download
memory/2060-10-0x00000000000D0000-0x00000000000F9000-memory.dmp

Filesize
164KB

Download
memory/2528-2-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/2528-3-0x0000000001F30000-0x0000000002233000-memory.dmp

Filesize
3.0MB

Download
memory/2528-6-0x00000000001C0000-0x00000000001D1000-memory.dmp

Filesize
68KB

Download
memory/2528-5-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download