xloader | 1ac4761ba49aff4b12b8dec8e72e5ef20ae8abfab93b8cbff2d3170267c0e79c

Analysis

max time kernel
149s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
08/07/2022, 15:12

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General

Target
b471727f32290399ab874f65d04f7167.exe
Size 291KB
Sample220708-sk6eksheg9
SHA256 1ac4761ba49aff4b12b8dec8e72e5ef20ae8abfab93b8cbff2d3170267c0e79c
MD5 b471727f32290399ab874f65d04f7167
SHA1 8327fe3d9d86fead471e1699b12e480a53d4b06f
SHA512 200bbc6a2423d962bb5a6a5ae2dc8d38258d4bf5f99b17f929936a67b00d0ce3d9075300c8cdf51b90dc6a463ebac9fc3a5cd866352f1eedf75f83c66470dc73
MD5 SHA1 SHA512

Score

10^/10

xloader mt88 loader persistence rat spyware stealer suricata

Malware Config

Extracted

Family

xloader

Version

Campaign

mt88

Decoy

syzbf32.xyz
pertlines.com
vybaveniprocyklostezky.com
elianmsalas.tech
a-snag-tokei-kaitori.com
tuvistaing.com
whoyoucall.net
l8e9gr.xyz
sophrologuemontevrain77.com
ciclean.com
the-roel.com
campgreencove.com
foremostbookkeeping.com
zamanscorner.com
efeturozemniyet.com
penelope.team
murata.life
solfuls.com
tradefitinvesting.com
skinbid.pro
hongyanwulei.com
aifconference.com
happinesssangha.com
microw0rker.com
agcompanion.com
renovacg.com
sisterfuckers.info
bigrockhuntingpreserve.com
loudbodies.info
hcr.store
000006138.com
ganitvigyan.com
libmananforum.xyz
bastianrob.xyz
leafybooster.com
65ratubh3j5fi.xyz
8id9pl8944ktb.xyz
designerinfotech.com
prmainey.com
5092377.com
mayascleanservices.com
selectendeavor.com
qxu0l1pgl9jm1.xyz
yanpoake.com
constructiongst.com
wwwfreemovies2021.com
norsgaard.net
raytan5.com
electricsemiloans.com
modernworklabs.com
sodapins.com
scwsav.com
ihrorg.com
vvv223.com
sofanemphuyen.com
zaqv40.xyz
verdure720.com
mysitetutorial.com
tur-advocates.com
vistadocs.com
kosodate-tiger.com
micahlinacero.com
nusires.com
ardtalscase.com
mariafonsecafreitas.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 4 IoCs

rat

resource	yara_rule
behavioral2/memory/4536-132-0x0000000000400000-0x000000000042B000-memory.dmp	xloader
behavioral2/memory/4536-134-0x0000000000400000-0x000000000042B000-memory.dmp	xloader
behavioral2/memory/2156-140-0x0000000001030000-0x000000000105B000-memory.dmp	xloader
behavioral2/memory/2156-145-0x0000000001030000-0x000000000105B000-memory.dmp	xloader

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	ipconfig.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\R4ETQRDHUP = "C:\\Program Files (x86)\\Atnulr6d\\tdyle6l9r9l_.exe"	ipconfig.exe

Executes dropped EXE 1 IoCs

pid	Process
3576	tdyle6l9r9l_.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

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 932 set thread context of 4536	932	b471727f32290399ab874f65d04f7167.exe	80
PID 4536 set thread context of 2948	4536	cvtres.exe	46
PID 2156 set thread context of 2948	2156	ipconfig.exe	46

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Atnulr6d\tdyle6l9r9l_.exe	ipconfig.exe
File opened for modification	C:\Program Files (x86)\Atnulr6d	Explorer.EXE
File created	C:\Program Files (x86)\Atnulr6d\tdyle6l9r9l_.exe	Explorer.EXE
File opened for modification	C:\Program Files (x86)\Atnulr6d\tdyle6l9r9l_.exe	Explorer.EXE

Gathers network information 2 TTPs 1 IoCs

Uses commandline utility to view network configuration.

System Information Discovery

T1082

Command-Line Interface

T1059

pid	Process
2156	ipconfig.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\User\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	ipconfig.exe

Suspicious behavior: EnumeratesProcesses 48 IoCs

pid	Process
4536	cvtres.exe
4536	cvtres.exe
4536	cvtres.exe
4536	cvtres.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2948	Explorer.EXE

Suspicious behavior: MapViewOfSection 7 IoCs

pid	Process
4536	cvtres.exe
4536	cvtres.exe
4536	cvtres.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe
2156	ipconfig.exe

Suspicious use of AdjustPrivilegeToken 11 IoCs

description	pid	Process
Token: SeDebugPrivilege	932	b471727f32290399ab874f65d04f7167.exe
Token: SeDebugPrivilege	4536	cvtres.exe
Token: SeDebugPrivilege	2156	ipconfig.exe
Token: SeShutdownPrivilege	2948	Explorer.EXE
Token: SeCreatePagefilePrivilege	2948	Explorer.EXE
Token: SeShutdownPrivilege	2948	Explorer.EXE
Token: SeCreatePagefilePrivilege	2948	Explorer.EXE
Token: SeShutdownPrivilege	2948	Explorer.EXE
Token: SeCreatePagefilePrivilege	2948	Explorer.EXE
Token: SeShutdownPrivilege	2948	Explorer.EXE
Token: SeCreatePagefilePrivilege	2948	Explorer.EXE

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 932 wrote to memory of 4536	932	b471727f32290399ab874f65d04f7167.exe	80
PID 932 wrote to memory of 4536	932	b471727f32290399ab874f65d04f7167.exe	80
PID 932 wrote to memory of 4536	932	b471727f32290399ab874f65d04f7167.exe	80
PID 932 wrote to memory of 4536	932	b471727f32290399ab874f65d04f7167.exe	80
PID 932 wrote to memory of 4536	932	b471727f32290399ab874f65d04f7167.exe	80
PID 932 wrote to memory of 4536	932	b471727f32290399ab874f65d04f7167.exe	80
PID 2948 wrote to memory of 2156	2948	Explorer.EXE	83
PID 2948 wrote to memory of 2156	2948	Explorer.EXE	83
PID 2948 wrote to memory of 2156	2948	Explorer.EXE	83
PID 2156 wrote to memory of 4252	2156	ipconfig.exe	87
PID 2156 wrote to memory of 4252	2156	ipconfig.exe	87
PID 2156 wrote to memory of 4252	2156	ipconfig.exe	87
PID 2156 wrote to memory of 3880	2156	ipconfig.exe	92
PID 2156 wrote to memory of 3880	2156	ipconfig.exe	92
PID 2156 wrote to memory of 3880	2156	ipconfig.exe	92
PID 2156 wrote to memory of 4048	2156	ipconfig.exe	94
PID 2156 wrote to memory of 4048	2156	ipconfig.exe	94
PID 2156 wrote to memory of 4048	2156	ipconfig.exe	94
PID 2156 wrote to memory of 544	2156	ipconfig.exe	96
PID 2156 wrote to memory of 544	2156	ipconfig.exe	96
PID 2156 wrote to memory of 544	2156	ipconfig.exe	96
PID 2948 wrote to memory of 3576	2948	Explorer.EXE	97
PID 2948 wrote to memory of 3576	2948	Explorer.EXE	97
PID 2948 wrote to memory of 3576	2948	Explorer.EXE	97

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Drops file in Program Files directory
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2948
- C:\Users\Admin\AppData\Local\Temp\b471727f32290399ab874f65d04f7167.exe
  "C:\Users\Admin\AppData\Local\Temp\b471727f32290399ab874f65d04f7167.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:932
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:4536
- C:\Windows\SysWOW64\ipconfig.exe
  "C:\Windows\SysWOW64\ipconfig.exe"
  2⤵
  - Adds policy Run key to start application
  - Suspicious use of SetThreadContext
  - Drops file in Program Files directory
  - Gathers network information
  - Modifies Internet Explorer settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2156
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe"
    3⤵
    PID:4252
- - 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:3880
- - 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:4048
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:544
- C:\Program Files (x86)\Atnulr6d\tdyle6l9r9l_.exe
  "C:\Program Files (x86)\Atnulr6d\tdyle6l9r9l_.exe"
  2⤵
  - Executes dropped EXE
  PID:3576

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Command-Line Interface

T1059

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

tdyle6l9r9l_.exe

Path C:\Program Files (x86)\Atnulr6d\tdyle6l9r9l_.exe
Size 45KB
SHA256 e4dbdbf7888ea96f3f8aa5c4c7f2bcf6e57d724dd8194fe5f35b673c6ef724ea
MD5 70d838a7dc5b359c3f938a71fad77db0
SHA1 66b83eb16481c334719eed406bc58a3c2b910923
SHA512 9c9a945db5b5e7ff8105bfe74578e6f00b5f707f7c3d8f1f1fb41553a6d0eab29cef026e77877a1ad6435fa7bc369141921442e1485f2b0894c6bbcbd7791034
SSDEEP 768:bINyGPbIriyUAfETlzjpyXcZ0R55GhrdRMJmcBkmcrH+ihBy3kM:3GjyUAfWNkFR5GTMJhkmM+wBxM
MD5 SHA1 SHA512 SSDEEP

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tdyle6l9r9l_.exe

Path C:\Program Files (x86)\Atnulr6d\tdyle6l9r9l_.exe
Size 45KB
SHA256 e4dbdbf7888ea96f3f8aa5c4c7f2bcf6e57d724dd8194fe5f35b673c6ef724ea
MD5 70d838a7dc5b359c3f938a71fad77db0
SHA1 66b83eb16481c334719eed406bc58a3c2b910923
SHA512 9c9a945db5b5e7ff8105bfe74578e6f00b5f707f7c3d8f1f1fb41553a6d0eab29cef026e77877a1ad6435fa7bc369141921442e1485f2b0894c6bbcbd7791034
SSDEEP 768:bINyGPbIriyUAfETlzjpyXcZ0R55GhrdRMJmcBkmcrH+ihBy3kM:3GjyUAfWNkFR5GTMJhkmM+wBxM
MD5 SHA1 SHA512 SSDEEP

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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/932-130-0x00000000008D0000-0x000000000091C000-memory.dmp

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memory/2156-143-0x00000000015F0000-0x0000000001680000-memory.dmp

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memory/2156-145-0x0000000001030000-0x000000000105B000-memory.dmp

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memory/2156-139-0x0000000000CB0000-0x0000000000CBB000-memory.dmp

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memory/2156-140-0x0000000001030000-0x000000000105B000-memory.dmp

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memory/2156-141-0x0000000001850000-0x0000000001B9A000-memory.dmp

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memory/2948-146-0x0000000008810000-0x00000000088D2000-memory.dmp

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memory/2948-144-0x0000000008810000-0x00000000088D2000-memory.dmp

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memory/2948-137-0x0000000008720000-0x0000000008802000-memory.dmp

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memory/4536-136-0x0000000001580000-0x0000000001591000-memory.dmp

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memory/4536-135-0x00000000015A0000-0x00000000018EA000-memory.dmp

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memory/4536-134-0x0000000000400000-0x000000000042B000-memory.dmp

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memory/4536-132-0x0000000000400000-0x000000000042B000-memory.dmp

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