xloader | 12e576f977f74152cdf32cdfd8ea6904e3728f69a4c67bf30f449d6a0623ea41

General

Target

$PLUGINSDIR/srrk.dll
Size

99KB
MD5

a3caa7e8895fb8eccc4cfc84c2f37283
SHA1

0c10231f8b45a1f6d9037fab396310a35fc572c5
SHA256

7b153187b30e47fda2f39d2621c04dded4e6776fabbebf5cc6a6a157a8324c02
SHA512

b96bdf0909a777ff559d31ac0600a5bbf90fcfa322232b4818ee275a2fda7638c4d06cb493f746a79e30367400ce2d252c46918e3dfbed851be81d1399b42c16
SSDEEP

1536:3pnXZ18vqXVzM4Ne15d1/LcIbUfsjsQ1uUYdYcj8Z:3pXZOIzM40FXV1WfjM

Score

10^/10

xloader u4an discovery loader rat

Malware Config

Extracted

Family

xloader

Version

2.5

Campaign

u4an

Decoy

crossroadsinndfs.com

reichsland.top

tomrose.net

zoneindrones.net

814851.com

pingblackjack.com

pdsolutions.tech

sweethomecolorado.net

witterx.com

beneschcyberconsulting.com

electroborg.com

metodopita.com

picklericktoken.com

alkhawatercafe.com

lelittnpasumo4.xyz

osrr.top

khonnaisoi.com

jbbaudienstleistungen.com

theconfidenceboosterprogram.com

diamondtrade.net

Signatures

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

Xloader payload 3 IoCs

rat

resource	yara_rule
behavioral3/memory/2320-1-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral3/memory/2320-4-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral3/memory/2052-11-0x00000000000C0000-0x00000000000E9000-memory.dmp	xloader

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2604 set thread context of 2320	2604	rundll32.exe	30
PID 2320 set thread context of 1192	2320	rundll32.exe	20
PID 2052 set thread context of 1192	2052	NAPSTAT.EXE	20

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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	NAPSTAT.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
2320	rundll32.exe
2320	rundll32.exe
2052	NAPSTAT.EXE
2052	NAPSTAT.EXE
2052	NAPSTAT.EXE
2052	NAPSTAT.EXE
2052	NAPSTAT.EXE
2052	NAPSTAT.EXE
2052	NAPSTAT.EXE
2052	NAPSTAT.EXE
2052	NAPSTAT.EXE
2052	NAPSTAT.EXE
2052	NAPSTAT.EXE
2052	NAPSTAT.EXE
2052	NAPSTAT.EXE
2052	NAPSTAT.EXE
2052	NAPSTAT.EXE
2052	NAPSTAT.EXE
2052	NAPSTAT.EXE
2052	NAPSTAT.EXE
2052	NAPSTAT.EXE
2052	NAPSTAT.EXE
2052	NAPSTAT.EXE
2052	NAPSTAT.EXE
2052	NAPSTAT.EXE
2052	NAPSTAT.EXE
2052	NAPSTAT.EXE
2052	NAPSTAT.EXE
2052	NAPSTAT.EXE
2052	NAPSTAT.EXE
2052	NAPSTAT.EXE

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2320	rundll32.exe
2320	rundll32.exe
2320	rundll32.exe
2052	NAPSTAT.EXE
2052	NAPSTAT.EXE

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2320	rundll32.exe
Token: SeDebugPrivilege	2052	NAPSTAT.EXE

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 2580 wrote to memory of 2604	2580	rundll32.exe	29
PID 2580 wrote to memory of 2604	2580	rundll32.exe	29
PID 2580 wrote to memory of 2604	2580	rundll32.exe	29
PID 2580 wrote to memory of 2604	2580	rundll32.exe	29
PID 2580 wrote to memory of 2604	2580	rundll32.exe	29
PID 2580 wrote to memory of 2604	2580	rundll32.exe	29
PID 2580 wrote to memory of 2604	2580	rundll32.exe	29
PID 2604 wrote to memory of 2320	2604	rundll32.exe	30
PID 2604 wrote to memory of 2320	2604	rundll32.exe	30
PID 2604 wrote to memory of 2320	2604	rundll32.exe	30
PID 2604 wrote to memory of 2320	2604	rundll32.exe	30
PID 2604 wrote to memory of 2320	2604	rundll32.exe	30
PID 2604 wrote to memory of 2320	2604	rundll32.exe	30
PID 2604 wrote to memory of 2320	2604	rundll32.exe	30
PID 2604 wrote to memory of 2320	2604	rundll32.exe	30
PID 2604 wrote to memory of 2320	2604	rundll32.exe	30
PID 2604 wrote to memory of 2320	2604	rundll32.exe	30
PID 1192 wrote to memory of 2052	1192	Explorer.EXE	31
PID 1192 wrote to memory of 2052	1192	Explorer.EXE	31
PID 1192 wrote to memory of 2052	1192	Explorer.EXE	31
PID 1192 wrote to memory of 2052	1192	Explorer.EXE	31
PID 2052 wrote to memory of 2068	2052	NAPSTAT.EXE	32
PID 2052 wrote to memory of 2068	2052	NAPSTAT.EXE	32
PID 2052 wrote to memory of 2068	2052	NAPSTAT.EXE	32
PID 2052 wrote to memory of 2068	2052	NAPSTAT.EXE	32

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1192
- C:\Windows\system32\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\srrk.dll,#1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2580
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\srrk.dll,#1
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2604
  - - C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\srrk.dll,#1
      4⤵
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of AdjustPrivilegeToken
      PID:2320
- C:\Windows\SysWOW64\NAPSTAT.EXE
  "C:\Windows\SysWOW64\NAPSTAT.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:2052
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\SysWOW64\rundll32.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2068

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/1192-6-0x0000000003970000-0x0000000003A70000-memory.dmp

Filesize
1024KB

Download
memory/1192-7-0x0000000004130000-0x0000000004278000-memory.dmp

Filesize
1.3MB

Download
memory/1192-12-0x0000000004130000-0x0000000004278000-memory.dmp

Filesize
1.3MB

Download
memory/2052-8-0x0000000000B30000-0x0000000000B76000-memory.dmp

Filesize
280KB

Download
memory/2052-10-0x0000000000B30000-0x0000000000B76000-memory.dmp

Filesize
280KB

Download
memory/2052-11-0x00000000000C0000-0x00000000000E9000-memory.dmp

Filesize
164KB

Download
memory/2320-1-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/2320-2-0x0000000002030000-0x0000000002333000-memory.dmp

Filesize
3.0MB

Download
memory/2320-5-0x00000000001D0000-0x00000000001E1000-memory.dmp

Filesize
68KB

Download
memory/2320-4-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/2604-0-0x0000000075557000-0x0000000075559000-memory.dmp

Filesize
8KB

Download

Analysis

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