xloader | 5852e0b1479d914e16a2f1cf21d61ff4e1f3d35b6fa5dbcf0055cfc2c9a89936

General

Target

$PLUGINSDIR/vksn.dll
Size

20KB
MD5

e34c52bba24db2908916801f8e39b7a7
SHA1

d58cf73e0993109a2cd0a07c980682337186385b
SHA256

e203779a905288614ca814693eaf5841c2213ca6c9f2e6d127accbaf69e84c32
SHA512

0e5abbc376c252936fb9ae149d000aa15b971d3e49b8f224a3789750f9ccbd1d399ceec28318e4e34d00577ed4140baba6fbdb8c57f33f6fc43131bd2c036436
SSDEEP

384:bmgOuiCzcXBWIOrJ0mLQrVTqyYVP74ovLwZRNngH8QvlN:bvOuiCzOX6cpjYVP7/z4Nw7v

Score

10^/10

xloader ycnd discovery loader rat

Malware Config

Extracted

Family

xloader

Version

2.5

Campaign

ycnd

Decoy

com-weekly.email

mfcon.net

bepcfinanceira.com

fattynoodlefitness.com

1pavij.cloud

sddn36.xyz

bestmoviequote.com

pntex.xyz

epicdefence.com

severiendepruis.online

spatialarray.com

aa6588.com

delucagiuseppe.com

xn--lu5bu5b0wddtl.com

staffingbackgrounds.com

miragetorrent.com

zdofmsk.online

charmsandfables.com

pifsdefistudio.com

paisacollection.com

Signatures

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

Xloader payload 3 IoCs

rat

resource	yara_rule
behavioral3/memory/2516-1-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral3/memory/2516-5-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral3/memory/2192-10-0x0000000000080000-0x00000000000A9000-memory.dmp	xloader

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1448 set thread context of 2516	1448	rundll32.exe	31
PID 2516 set thread context of 1200	2516	rundll32.exe	21
PID 2192 set thread context of 1200	2192	cmmon32.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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmmon32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
2516	rundll32.exe
2516	rundll32.exe
2192	cmmon32.exe
2192	cmmon32.exe
2192	cmmon32.exe
2192	cmmon32.exe
2192	cmmon32.exe
2192	cmmon32.exe
2192	cmmon32.exe
2192	cmmon32.exe
2192	cmmon32.exe
2192	cmmon32.exe
2192	cmmon32.exe
2192	cmmon32.exe
2192	cmmon32.exe
2192	cmmon32.exe
2192	cmmon32.exe
2192	cmmon32.exe
2192	cmmon32.exe
2192	cmmon32.exe
2192	cmmon32.exe
2192	cmmon32.exe
2192	cmmon32.exe
2192	cmmon32.exe
2192	cmmon32.exe
2192	cmmon32.exe
2192	cmmon32.exe
2192	cmmon32.exe
2192	cmmon32.exe
2192	cmmon32.exe
2192	cmmon32.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2516	rundll32.exe
2516	rundll32.exe
2516	rundll32.exe
2192	cmmon32.exe
2192	cmmon32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2516	rundll32.exe
Token: SeDebugPrivilege	2192	cmmon32.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 1320 wrote to memory of 1448	1320	rundll32.exe	30
PID 1320 wrote to memory of 1448	1320	rundll32.exe	30
PID 1320 wrote to memory of 1448	1320	rundll32.exe	30
PID 1320 wrote to memory of 1448	1320	rundll32.exe	30
PID 1320 wrote to memory of 1448	1320	rundll32.exe	30
PID 1320 wrote to memory of 1448	1320	rundll32.exe	30
PID 1320 wrote to memory of 1448	1320	rundll32.exe	30
PID 1448 wrote to memory of 2516	1448	rundll32.exe	31
PID 1448 wrote to memory of 2516	1448	rundll32.exe	31
PID 1448 wrote to memory of 2516	1448	rundll32.exe	31
PID 1448 wrote to memory of 2516	1448	rundll32.exe	31
PID 1448 wrote to memory of 2516	1448	rundll32.exe	31
PID 1448 wrote to memory of 2516	1448	rundll32.exe	31
PID 1448 wrote to memory of 2516	1448	rundll32.exe	31
PID 1448 wrote to memory of 2516	1448	rundll32.exe	31
PID 1448 wrote to memory of 2516	1448	rundll32.exe	31
PID 1448 wrote to memory of 2516	1448	rundll32.exe	31
PID 1200 wrote to memory of 2192	1200	Explorer.EXE	32
PID 1200 wrote to memory of 2192	1200	Explorer.EXE	32
PID 1200 wrote to memory of 2192	1200	Explorer.EXE	32
PID 1200 wrote to memory of 2192	1200	Explorer.EXE	32
PID 2192 wrote to memory of 2124	2192	cmmon32.exe	33
PID 2192 wrote to memory of 2124	2192	cmmon32.exe	33
PID 2192 wrote to memory of 2124	2192	cmmon32.exe	33
PID 2192 wrote to memory of 2124	2192	cmmon32.exe	33

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1200
- C:\Windows\system32\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\vksn.dll,#1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1320
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\vksn.dll,#1
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1448
  - - C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\vksn.dll,#1
      4⤵
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of AdjustPrivilegeToken
      PID:2516
- C:\Windows\SysWOW64\cmmon32.exe
  "C:\Windows\SysWOW64\cmmon32.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:2192
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\SysWOW64\rundll32.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2124

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/1200-7-0x0000000004E00000-0x0000000004F1B000-memory.dmp

Filesize
1.1MB

Download
memory/1200-11-0x0000000004E00000-0x0000000004F1B000-memory.dmp

Filesize
1.1MB

Download
memory/1448-0-0x0000000010000000-0x0000000010009000-memory.dmp

Filesize
36KB

Download
memory/1448-2-0x0000000010000000-0x0000000010009000-memory.dmp

Filesize
36KB

Download
memory/2192-9-0x0000000000A70000-0x0000000000A7D000-memory.dmp

Filesize
52KB

Download
memory/2192-8-0x0000000000A70000-0x0000000000A7D000-memory.dmp

Filesize
52KB

Download
memory/2192-10-0x0000000000080000-0x00000000000A9000-memory.dmp

Filesize
164KB

Download
memory/2516-1-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/2516-3-0x0000000002300000-0x0000000002603000-memory.dmp

Filesize
3.0MB

Download
memory/2516-6-0x00000000001B0000-0x00000000001C1000-memory.dmp

Filesize
68KB

Download
memory/2516-5-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download

Analysis

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