xloader | 49de1052f457153b3e0de091d9658354b80ef0312bb3a74377c6565c4b68b5b8

General

Target

vbc.exe
Size

575KB
MD5

2986502fc991bed7cc87122bc481d5b4
SHA1

45d8d4498052803984a49f880d874c659945fc0c
SHA256

45de0a47d8bee8de67d818ea239f0f9c934c3299be3c3faefacb9e1e4800078c
SHA512

54f3fc749923be12396af61b64bbeaf5b12e290159960517989b79d882d4a1ed2af6045a85987ac615b9da1d9232d63db5ceacbf4c907b5fd33735575c75a3d8
SSDEEP

12288:zBqlwSPINx9zVGr5rg3xcnX5pPhdc2WjgDw:yDIxfErgAXc2WjgDw

Score

10^/10

xloader ns87 discovery loader rat

Malware Config

Extracted

Family

xloader

Version

2.5

Campaign

ns87

Decoy

hcjn998.com

y963257.xyz

upcrunchnow.com

adornor.online

boyhunters.com

mchaskell.com

bayanescort.xyz

jovinodossantossite.com

hubhosted.com

evertownnycapartments.net

mgav40.xyz

lfykjx.com

asscheekspizzaboi.com

chinacxq.com

abovecover.net

listingswithalex.com

hhcreativeartsociety.com

aryanagasosa.xyz

caesarpro.com

junanbolsas.online

Signatures

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

Xloader payload 3 IoCs

rat

resource	yara_rule
behavioral1/memory/2832-12-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral1/memory/2832-16-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral1/memory/2928-22-0x0000000000070000-0x0000000000099000-memory.dmp	xloader

Deletes itself 1 IoCs

pid	Process
2176	cmd.exe

Uses the VBS compiler for execution 1 TTPs

Command and Scripting Interpreter
T1059

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1576 set thread context of 2832	1576	vbc.exe	31
PID 2832 set thread context of 1272	2832	vbc.exe	21
PID 2928 set thread context of 1272	2928	cscript.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	vbc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cscript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
2832	vbc.exe
2832	vbc.exe
2928	cscript.exe
2928	cscript.exe
2928	cscript.exe
2928	cscript.exe
2928	cscript.exe
2928	cscript.exe
2928	cscript.exe
2928	cscript.exe
2928	cscript.exe
2928	cscript.exe
2928	cscript.exe
2928	cscript.exe
2928	cscript.exe
2928	cscript.exe
2928	cscript.exe
2928	cscript.exe
2928	cscript.exe
2928	cscript.exe
2928	cscript.exe
2928	cscript.exe
2928	cscript.exe
2928	cscript.exe
2928	cscript.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2832	vbc.exe
2832	vbc.exe
2832	vbc.exe
2928	cscript.exe
2928	cscript.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2832	vbc.exe
Token: SeDebugPrivilege	2928	cscript.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1576 wrote to memory of 2832	1576	vbc.exe	31
PID 1576 wrote to memory of 2832	1576	vbc.exe	31
PID 1576 wrote to memory of 2832	1576	vbc.exe	31
PID 1576 wrote to memory of 2832	1576	vbc.exe	31
PID 1576 wrote to memory of 2832	1576	vbc.exe	31
PID 1576 wrote to memory of 2832	1576	vbc.exe	31
PID 1576 wrote to memory of 2832	1576	vbc.exe	31
PID 1272 wrote to memory of 2928	1272	Explorer.EXE	32
PID 1272 wrote to memory of 2928	1272	Explorer.EXE	32
PID 1272 wrote to memory of 2928	1272	Explorer.EXE	32
PID 1272 wrote to memory of 2928	1272	Explorer.EXE	32
PID 2928 wrote to memory of 2176	2928	cscript.exe	33
PID 2928 wrote to memory of 2176	2928	cscript.exe	33
PID 2928 wrote to memory of 2176	2928	cscript.exe	33
PID 2928 wrote to memory of 2176	2928	cscript.exe	33

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1272
- C:\Users\Admin\AppData\Local\Temp\vbc.exe
  "C:\Users\Admin\AppData\Local\Temp\vbc.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1576
- - C:\Users\Admin\AppData\Local\Temp\vbc.exe
    "C:\Users\Admin\AppData\Local\Temp\vbc.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2832
- C:\Windows\SysWOW64\cscript.exe
  "C:\Windows\SysWOW64\cscript.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:2928
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\vbc.exe"
    3⤵
    - Deletes itself
    - System Location Discovery: System Language Discovery
    PID:2176

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

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/1272-23-0x0000000007320000-0x0000000007497000-memory.dmp

Filesize
1.5MB

Download
memory/1272-19-0x0000000007320000-0x0000000007497000-memory.dmp

Filesize
1.5MB

Download
memory/1272-18-0x0000000003A60000-0x0000000003B60000-memory.dmp

Filesize
1024KB

Download
memory/1576-13-0x0000000074020000-0x000000007470E000-memory.dmp

Filesize
6.9MB

Download
memory/1576-1-0x00000000008B0000-0x0000000000944000-memory.dmp

Filesize
592KB

Download
memory/1576-2-0x0000000074020000-0x000000007470E000-memory.dmp

Filesize
6.9MB

Download
memory/1576-3-0x00000000004F0000-0x00000000004FC000-memory.dmp

Filesize
48KB

Download
memory/1576-4-0x000000007402E000-0x000000007402F000-memory.dmp

Filesize
4KB

Download
memory/1576-5-0x0000000074020000-0x000000007470E000-memory.dmp

Filesize
6.9MB

Download
memory/1576-6-0x0000000002020000-0x0000000002088000-memory.dmp

Filesize
416KB

Download
memory/1576-0-0x000000007402E000-0x000000007402F000-memory.dmp

Filesize
4KB

Download
memory/2832-7-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/2832-14-0x0000000000AE0000-0x0000000000DE3000-memory.dmp

Filesize
3.0MB

Download
memory/2832-8-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/2832-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2832-17-0x0000000000190000-0x00000000001A1000-memory.dmp

Filesize
68KB

Download
memory/2832-16-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/2832-12-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/2928-21-0x0000000000FF0000-0x0000000001012000-memory.dmp

Filesize
136KB

Download
memory/2928-20-0x0000000000FF0000-0x0000000001012000-memory.dmp

Filesize
136KB

Download
memory/2928-22-0x0000000000070000-0x0000000000099000-memory.dmp

Filesize
164KB

Download

Analysis

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