xloader | 4e18d364c4fa2db105557cf8105e5e3d77c9d7a06590b4f897051f99014da5be

General

Target

vbc.exe
Size

255KB
MD5

de8a80136d8b6c2002ba8473bda2a617
SHA1

6ccca366fd276d0bff3197b02bfb8c192fe75cb3
SHA256

4e18d364c4fa2db105557cf8105e5e3d77c9d7a06590b4f897051f99014da5be
SHA512

d93ca922a818f387312a317ef84e22d88ac9c091a8ddb85c742983fa37801614681d22b842aacd66f6d66621700a0e4eeacc632428303f8db6c7bd0f8d607875

Score

10^/10

xloader b6a4 loader rat

Malware Config

Extracted

Family

xloader

Version

2.3

Campaign

b6a4

C2

http://www.helpmovingandstorage.com/b6a4/

Decoy

gr2future.com

asteroid.finance

skoba-plast.com

rnerfrfw5z3ki.net

thesmartroadtoretirement.com

avisdrummondhomes.com

banban365.net

profesyonelkampcadiri.net

royalloanhs.com

yulujy.com

xn--naqejahan-n3b.com

msalee.net

dollyvee.com

albertagamehawkersclub.com

cbspecialists.com

findingforeverrealty.com

mrtireshop.com

wadamasanari.com

growtechinfo.com

qipai039.com

Signatures

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

Xloader Payload 2 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/600-56-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral1/memory/868-65-0x0000000000090000-0x00000000000B9000-memory.dmp	xloader

Loads dropped DLL 1 IoCs

Processes:

vbc.exe

pid process

532 vbc.exe
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

pid	process
532	vbc.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

vbc.exevbc.exerundll32.exe

description	pid	process	target process
PID 532 set thread context of 600	532	vbc.exe	vbc.exe
PID 600 set thread context of 1248	600	vbc.exe	Explorer.EXE
PID 600 set thread context of 1248	600	vbc.exe	Explorer.EXE
PID 868 set thread context of 1248	868	rundll32.exe	Explorer.EXE

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 31 IoCs

Processes:

vbc.exerundll32.exe

pid	process
600	vbc.exe
600	vbc.exe
600	vbc.exe
868	rundll32.exe
868	rundll32.exe
868	rundll32.exe
868	rundll32.exe
868	rundll32.exe
868	rundll32.exe
868	rundll32.exe
868	rundll32.exe
868	rundll32.exe
868	rundll32.exe
868	rundll32.exe
868	rundll32.exe
868	rundll32.exe
868	rundll32.exe
868	rundll32.exe
868	rundll32.exe
868	rundll32.exe
868	rundll32.exe
868	rundll32.exe
868	rundll32.exe
868	rundll32.exe
868	rundll32.exe
868	rundll32.exe
868	rundll32.exe
868	rundll32.exe
868	rundll32.exe
868	rundll32.exe
868	rundll32.exe

Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

vbc.exevbc.exerundll32.exe

pid process

532 vbc.exe
600 vbc.exe
600 vbc.exe
600 vbc.exe
600 vbc.exe
868 rundll32.exe
868 rundll32.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

vbc.exerundll32.exe

description pid process

Token: SeDebugPrivilege 600 vbc.exe
Token: SeDebugPrivilege 868 rundll32.exe
Suspicious use of FindShellTrayWindow 6 IoCs

Processes:

Explorer.EXE

pid process

1248 Explorer.EXE
1248 Explorer.EXE
1248 Explorer.EXE
1248 Explorer.EXE
1248 Explorer.EXE
1248 Explorer.EXE
Suspicious use of SendNotifyMessage 6 IoCs

Processes:

Explorer.EXE

pid process

1248 Explorer.EXE
1248 Explorer.EXE
1248 Explorer.EXE
1248 Explorer.EXE
1248 Explorer.EXE
1248 Explorer.EXE

pid	process
532	vbc.exe
600	vbc.exe
600	vbc.exe
600	vbc.exe
600	vbc.exe
868	rundll32.exe
868	rundll32.exe

description	pid	process
Token: SeDebugPrivilege	600	vbc.exe
Token: SeDebugPrivilege	868	rundll32.exe

pid	process
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE

pid	process
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

vbc.exeExplorer.EXE

description	pid	process	target process
PID 532 wrote to memory of 600	532	vbc.exe	vbc.exe
PID 532 wrote to memory of 600	532	vbc.exe	vbc.exe
PID 532 wrote to memory of 600	532	vbc.exe	vbc.exe
PID 532 wrote to memory of 600	532	vbc.exe	vbc.exe
PID 532 wrote to memory of 600	532	vbc.exe	vbc.exe
PID 1248 wrote to memory of 868	1248	Explorer.EXE	rundll32.exe
PID 1248 wrote to memory of 868	1248	Explorer.EXE	rundll32.exe
PID 1248 wrote to memory of 868	1248	Explorer.EXE	rundll32.exe
PID 1248 wrote to memory of 868	1248	Explorer.EXE	rundll32.exe
PID 1248 wrote to memory of 868	1248	Explorer.EXE	rundll32.exe
PID 1248 wrote to memory of 868	1248	Explorer.EXE	rundll32.exe
PID 1248 wrote to memory of 868	1248	Explorer.EXE	rundll32.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1248

C:\Users\Admin\AppData\Local\Temp\vbc.exe
"C:\Users\Admin\AppData\Local\Temp\vbc.exe"
2⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:532

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:600

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
PID:868

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scripting

1

T1064

Persistence

Privilege Escalation

Defense Evasion

Scripting

1

T1064

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\nsv8FE0.tmp\tkxaz.dll
MD5
220b53f6a42f8f23f16378c8330763d1

SHA1
02078dc5f0d573ba4c7bb24f69c7218f31987be6

SHA256
3c470a8a1732a7e3e06cd561f5566c192f851e763b3694d84f546fe8ba379637

SHA512
6f442f207deaabb292851abae4d7c372504aa61a1ccfdce6d6f5b5d9d00fff681ff3a458731e47d227404a9bbab6f7fc61493a98075fac33db89766064cbb6f2

Download Submit
memory/532-53-0x0000000075EC1000-0x0000000075EC3000-memory.dmp

Filesize
8KB

Download
memory/600-60-0x0000000000360000-0x0000000000370000-memory.dmp

Filesize
64KB

Download
memory/600-55-0x000000000041D0B0-mapping.dmp

Download
memory/600-57-0x00000000008B0000-0x0000000000BB3000-memory.dmp

Filesize
3.0MB

Download
memory/600-56-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/600-58-0x0000000000320000-0x0000000000330000-memory.dmp

Filesize
64KB

Download
memory/868-62-0x0000000000000000-mapping.dmp

Download
memory/868-65-0x0000000000090000-0x00000000000B9000-memory.dmp

Filesize
164KB

Download
memory/868-64-0x0000000000540000-0x000000000054E000-memory.dmp

Filesize
56KB

Download
memory/868-66-0x00000000020D0000-0x00000000023D3000-memory.dmp

Filesize
3.0MB

Download
memory/868-67-0x0000000001D90000-0x0000000001E1F000-memory.dmp

Filesize
572KB

Download
memory/1248-61-0x0000000003EF0000-0x000000000402E000-memory.dmp

Filesize
1.2MB

Download
memory/1248-59-0x0000000003E00000-0x0000000003EE1000-memory.dmp

Filesize
900KB

Download
memory/1248-68-0x0000000003A50000-0x0000000003B13000-memory.dmp

Filesize
780KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads