xloader | fc8dedb234d17ae5d5e58eaf372988114b82bd1a9defe9934e8d7738e15a88ab

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
26/05/2022, 09:27

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General

Target
Confirmation Transfer Ref_MT103_0023456891099200301019898.exe
Size 460KB
Sample220526-leqzdaabb7
SHA256 fc8dedb234d17ae5d5e58eaf372988114b82bd1a9defe9934e8d7738e15a88ab
MD5 3400578649e2a279e6c7cdf89fbb583c
SHA1 7a0a5f4712f0dc9a6e422406b905b5137421dd6c
SHA512 35263b3a894158b59febf4d4c228407e51f2082e70891e3423878a9f47047496f1d3975658dffd10bfc80952e5748f3a8f8dce99e091b0f7e7900ba9d80953e5
MD5 SHA1 SHA512

Score

10^/10

xloader arna loader persistence rat spyware stealer suricata

Malware Config

Extracted

Family

xloader

Version

Campaign

arna

Decoy

desafio24diasfit.com
koreabusinesses.com
revealingreals.com
mynewprofilepi.com
whirlwindforex.com
uwbws.com
m1play.asia
chinonyesky.com
boredverseclub.xyz
drmarcusviniciuspneumo.com
27casestudies.com
renumats.com
jasemedicalpr.com
jeraed.com
conversioncactus.com
john-marshal.com
orlandoseniorcarellc.com
webcecropia.com
servicemyloanvandykmortgage.com
leverageyourlifeacademy.com
yourhousetohome.com
log-1n-amazaan.com
galuwergroups.com
tronsclub.com
murphycatevehicles.com
aklaaax.com
weekendchowdown.com
087684.com
lumenatoa.com
compassion.wine
katuraseitai1012.com
woowoowairua.com
reipreschoolth.com
picchiottiyachts.net
fopaymax.com
parmateb.com
nfiniteenterprise.net
limostock.com
j7kk6.xyz
thailandopened.com
leadtees.com
cutedrift.store
tarotamarreshechizos.com
evergreenwoodcraft.online
coinagoqa.xyz
zlldm.site
libranoctis.com
fa1032.xyz
jpremium.net
yardenofeden.com
jyzyun.com
fly-er.com
sopipedia.com
ppitaxcheck.com
sirenagorda.com
wukqjoz.com
huaijiuchao.com
c-nexco-tokyo.net
yeuemnhieu.site
finance-assist.com
ittybittydonkeys.com
indoprideapparel.com
bringdata.net
78872b.com
ideaotics.com

Signatures

Xloader
Xloader is a rebranded version of Formbook malware.
loader xloader
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata
suricata: ET MALWARE FormBook CnC Checkin (POST) M2
suricata: ET MALWARE FormBook CnC Checkin (POST) M2
suricata

Xloader Payload 2 IoCs

rat

resource	yara_rule
behavioral2/memory/3524-134-0x0000000000400000-0x000000000042B000-memory.dmp	xloader
behavioral2/memory/3516-142-0x0000000000800000-0x000000000082B000-memory.dmp	xloader

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation	Confirmation Transfer Ref_MT103_0023456891099200301019898.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\firefox = "\"C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Start Menu\\Programs\\firefox.exe\""	Confirmation Transfer Ref_MT103_0023456891099200301019898.exe
Key created	\Registry\Machine\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\TNIX1NEXZF = "C:\\Program Files (x86)\\Av8ipdxd\\kxbxnxl_08pz4.exe"	explorer.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 3804 set thread context of 3524	3804	Confirmation Transfer Ref_MT103_0023456891099200301019898.exe	87
PID 3524 set thread context of 372	3524	Confirmation Transfer Ref_MT103_0023456891099200301019898.exe	20
PID 3516 set thread context of 372	3516	explorer.exe	20

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Av8ipdxd\kxbxnxl_08pz4.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

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4288	timeout.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\User\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	explorer.exe

Suspicious behavior: EnumeratesProcesses 44 IoCs

pid	Process
3804	Confirmation Transfer Ref_MT103_0023456891099200301019898.exe
3804	Confirmation Transfer Ref_MT103_0023456891099200301019898.exe
3524	Confirmation Transfer Ref_MT103_0023456891099200301019898.exe
3524	Confirmation Transfer Ref_MT103_0023456891099200301019898.exe
3524	Confirmation Transfer Ref_MT103_0023456891099200301019898.exe
3524	Confirmation Transfer Ref_MT103_0023456891099200301019898.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
372	Explorer.EXE

Suspicious behavior: MapViewOfSection 7 IoCs

pid	Process
3524	Confirmation Transfer Ref_MT103_0023456891099200301019898.exe
3524	Confirmation Transfer Ref_MT103_0023456891099200301019898.exe
3524	Confirmation Transfer Ref_MT103_0023456891099200301019898.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe
3516	explorer.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3804	Confirmation Transfer Ref_MT103_0023456891099200301019898.exe
Token: SeDebugPrivilege	3524	Confirmation Transfer Ref_MT103_0023456891099200301019898.exe
Token: SeDebugPrivilege	3516	explorer.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 3804 wrote to memory of 2572	3804	Confirmation Transfer Ref_MT103_0023456891099200301019898.exe	83
PID 3804 wrote to memory of 2572	3804	Confirmation Transfer Ref_MT103_0023456891099200301019898.exe	83
PID 3804 wrote to memory of 2572	3804	Confirmation Transfer Ref_MT103_0023456891099200301019898.exe	83
PID 2572 wrote to memory of 4288	2572	cmd.exe	85
PID 2572 wrote to memory of 4288	2572	cmd.exe	85
PID 2572 wrote to memory of 4288	2572	cmd.exe	85
PID 3804 wrote to memory of 3524	3804	Confirmation Transfer Ref_MT103_0023456891099200301019898.exe	87
PID 3804 wrote to memory of 3524	3804	Confirmation Transfer Ref_MT103_0023456891099200301019898.exe	87
PID 3804 wrote to memory of 3524	3804	Confirmation Transfer Ref_MT103_0023456891099200301019898.exe	87
PID 3804 wrote to memory of 3524	3804	Confirmation Transfer Ref_MT103_0023456891099200301019898.exe	87
PID 3804 wrote to memory of 3524	3804	Confirmation Transfer Ref_MT103_0023456891099200301019898.exe	87
PID 3804 wrote to memory of 3524	3804	Confirmation Transfer Ref_MT103_0023456891099200301019898.exe	87
PID 372 wrote to memory of 3516	372	Explorer.EXE	88
PID 372 wrote to memory of 3516	372	Explorer.EXE	88
PID 372 wrote to memory of 3516	372	Explorer.EXE	88
PID 3516 wrote to memory of 1440	3516	explorer.exe	89
PID 3516 wrote to memory of 1440	3516	explorer.exe	89
PID 3516 wrote to memory of 1440	3516	explorer.exe	89
PID 3516 wrote to memory of 3236	3516	explorer.exe	91
PID 3516 wrote to memory of 3236	3516	explorer.exe	91
PID 3516 wrote to memory of 3236	3516	explorer.exe	91
PID 3516 wrote to memory of 2084	3516	explorer.exe	93
PID 3516 wrote to memory of 2084	3516	explorer.exe	93
PID 3516 wrote to memory of 2084	3516	explorer.exe	93
PID 3516 wrote to memory of 4372	3516	explorer.exe	95
PID 3516 wrote to memory of 4372	3516	explorer.exe	95
PID 3516 wrote to memory of 4372	3516	explorer.exe	95

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:372
- C:\Users\Admin\AppData\Local\Temp\Confirmation Transfer Ref_MT103_0023456891099200301019898.exe
  "C:\Users\Admin\AppData\Local\Temp\Confirmation Transfer Ref_MT103_0023456891099200301019898.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3804
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout 20
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2572
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 20
      4⤵
      Delays execution with timeout.exe
      PID:4288
- - C:\Users\Admin\AppData\Local\Temp\Confirmation Transfer Ref_MT103_0023456891099200301019898.exe
    "C:\Users\Admin\AppData\Local\Temp\Confirmation Transfer Ref_MT103_0023456891099200301019898.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:3524
- C:\Windows\SysWOW64\explorer.exe
  "C:\Windows\SysWOW64\explorer.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Drops file in Program Files directory
  - Modifies Internet Explorer settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3516
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\Confirmation Transfer Ref_MT103_0023456891099200301019898.exe"
    3⤵
    PID:1440
- - C:\Windows\SysWOW64\cmd.exe
    /c copy "C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
    3⤵
    PID:3236
- - C:\Windows\SysWOW64\cmd.exe
    /c copy "C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
    3⤵
    PID:2084
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:4372

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

DB1

Path C:\Users\Admin\AppData\Local\Temp\DB1
Size 40KB
SHA256 b281ce54125d4250a80f48fcc02a8eea53f2c35c3b726e2512c3d493da0013bf
MD5 b608d407fc15adea97c26936bc6f03f6
SHA1 953e7420801c76393902c0d6bb56148947e41571
SHA512 cc96ddf4bf90d6aaa9d86803cb2aa30cd8e9b295aee1bd5544b88aeab63dc60bb1d4641e846c9771bab51aabbfbcd984c6d3ee83b96f5b65d09c0841d464b9e4
SSDEEP 48:2j3WBA+IIYICVEq8MX0D0HSFlNUK6lGNxGt7KLk8s8LKvUf9KVyJ7hU:u2FCn8MZyFlulGNxGt7KLyeymw
MD5 SHA1 SHA512 SSDEEP

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DB1

Path C:\Users\Admin\AppData\Local\Temp\DB1
Size 48KB
SHA256 c9fd7be4579e4aa942e8c2b44ab10115fa6c2fe6afd0c584865413d9d53f3b2a
MD5 349e6eb110e34a08924d92f6b334801d
SHA1 bdfb289daff51890cc71697b6322aa4b35ec9169
SHA512 2a635b815a5e117ea181ee79305ee1baf591459427acc5210d8c6c7e447be3513ead871c605eb3d32e4ab4111b2a335f26520d0ef8c1245a4af44e1faec44574
SSDEEP 96:uRMKLyeymwxCn8MZyFlSynlbiXyKwt8hG:uRkxGOXnlbibhG
MD5 SHA1 SHA512 SSDEEP

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memory/372-145-0x0000000008770000-0x00000000088B1000-memory.dmp

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memory/372-138-0x0000000003330000-0x00000000033FB000-memory.dmp

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memory/3516-143-0x0000000002C50000-0x0000000002F9A000-memory.dmp

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memory/3516-142-0x0000000000800000-0x000000000082B000-memory.dmp

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memory/3516-141-0x0000000000EA0000-0x00000000012D3000-memory.dmp

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memory/3516-144-0x00000000029F0000-0x0000000002A80000-memory.dmp

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memory/3524-137-0x00000000012F0000-0x0000000001301000-memory.dmp

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memory/3524-136-0x00000000017C0000-0x0000000001B0A000-memory.dmp

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memory/3524-134-0x0000000000400000-0x000000000042B000-memory.dmp

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memory/3804-130-0x0000000000380000-0x00000000003F8000-memory.dmp

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