xloader | ed02c3de60701f97271c578756211131d9d5e7bc141e77f97abfbe9d64ccc92b

Analysis

max time kernel
152s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
08/06/2022, 17:23

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General

Target
MT103_Ref001293838 Confirmation transfer Copy.exe
Size 76KB
Sample220608-vx44dsdbe9
SHA256 ed02c3de60701f97271c578756211131d9d5e7bc141e77f97abfbe9d64ccc92b
MD5 6c0c7c7b6bb4b7beb0fd2e834f34db5d
SHA1 4fbd9569327fd153021dba6bcac1ce4751a92405
SHA512 a07820d5e460979be1316eeac1f7635b197f04f4f638ad8dbfa81dcb309765f162f542bf0ef07a0be9985f590b4879e281254be03a78379d84a5e696f2949d16
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

Xloader Payload 4 IoCs

rat

resource	yara_rule
behavioral2/memory/1880-137-0x0000000000400000-0x000000000042B000-memory.dmp	xloader
behavioral2/memory/1880-143-0x0000000000400000-0x000000000042B000-memory.dmp	xloader
behavioral2/memory/4432-145-0x0000000000410000-0x000000000043B000-memory.dmp	xloader
behavioral2/memory/4432-148-0x0000000000410000-0x000000000043B000-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	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\DBCDY = "C:\\Program Files (x86)\\Ixtsdb\\h2kd4vqj_tbhmx.exe"	rundll32.exe

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-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation	MT103_Ref001293838 Confirmation transfer Copy.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 1496 set thread context of 1880	1496	MT103_Ref001293838 Confirmation transfer Copy.exe	93
PID 1880 set thread context of 3064	1880	RegAsm.exe	54
PID 4432 set thread context of 3064	4432	rundll32.exe	54

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Ixtsdb\h2kd4vqj_tbhmx.exe	rundll32.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
2272	timeout.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\User\S-1-5-21-1081944012-3634099177-1681222835-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	rundll32.exe

Suspicious behavior: EnumeratesProcesses 36 IoCs

pid	Process
1496	MT103_Ref001293838 Confirmation transfer Copy.exe
1496	MT103_Ref001293838 Confirmation transfer Copy.exe
1880	RegAsm.exe
1880	RegAsm.exe
1880	RegAsm.exe
1880	RegAsm.exe
4432	rundll32.exe
4432	rundll32.exe
4432	rundll32.exe
4432	rundll32.exe
4432	rundll32.exe
4432	rundll32.exe
4432	rundll32.exe
4432	rundll32.exe
4432	rundll32.exe
4432	rundll32.exe
4432	rundll32.exe
4432	rundll32.exe
4432	rundll32.exe
4432	rundll32.exe
4432	rundll32.exe
4432	rundll32.exe
4432	rundll32.exe
4432	rundll32.exe
4432	rundll32.exe
4432	rundll32.exe
4432	rundll32.exe
4432	rundll32.exe
4432	rundll32.exe
4432	rundll32.exe
4432	rundll32.exe
4432	rundll32.exe
4432	rundll32.exe
4432	rundll32.exe
4432	rundll32.exe
4432	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3064	Explorer.EXE

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
1880	RegAsm.exe
1880	RegAsm.exe
1880	RegAsm.exe
4432	rundll32.exe
4432	rundll32.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1496	MT103_Ref001293838 Confirmation transfer Copy.exe
Token: SeDebugPrivilege	1880	RegAsm.exe
Token: SeDebugPrivilege	4432	rundll32.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 1496 wrote to memory of 3452	1496	MT103_Ref001293838 Confirmation transfer Copy.exe	80
PID 1496 wrote to memory of 3452	1496	MT103_Ref001293838 Confirmation transfer Copy.exe	80
PID 1496 wrote to memory of 3452	1496	MT103_Ref001293838 Confirmation transfer Copy.exe	80
PID 1496 wrote to memory of 4476	1496	MT103_Ref001293838 Confirmation transfer Copy.exe	90
PID 1496 wrote to memory of 4476	1496	MT103_Ref001293838 Confirmation transfer Copy.exe	90
PID 1496 wrote to memory of 4476	1496	MT103_Ref001293838 Confirmation transfer Copy.exe	90
PID 4476 wrote to memory of 2272	4476	cmd.exe	92
PID 4476 wrote to memory of 2272	4476	cmd.exe	92
PID 4476 wrote to memory of 2272	4476	cmd.exe	92
PID 1496 wrote to memory of 1880	1496	MT103_Ref001293838 Confirmation transfer Copy.exe	93
PID 1496 wrote to memory of 1880	1496	MT103_Ref001293838 Confirmation transfer Copy.exe	93
PID 1496 wrote to memory of 1880	1496	MT103_Ref001293838 Confirmation transfer Copy.exe	93
PID 1496 wrote to memory of 1880	1496	MT103_Ref001293838 Confirmation transfer Copy.exe	93
PID 1496 wrote to memory of 1880	1496	MT103_Ref001293838 Confirmation transfer Copy.exe	93
PID 1496 wrote to memory of 1880	1496	MT103_Ref001293838 Confirmation transfer Copy.exe	93
PID 3064 wrote to memory of 4432	3064	Explorer.EXE	94
PID 3064 wrote to memory of 4432	3064	Explorer.EXE	94
PID 3064 wrote to memory of 4432	3064	Explorer.EXE	94
PID 4432 wrote to memory of 3984	4432	rundll32.exe	95
PID 4432 wrote to memory of 3984	4432	rundll32.exe	95
PID 4432 wrote to memory of 3984	4432	rundll32.exe	95
PID 4432 wrote to memory of 2288	4432	rundll32.exe	97
PID 4432 wrote to memory of 2288	4432	rundll32.exe	97
PID 4432 wrote to memory of 2288	4432	rundll32.exe	97

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer	rundll32.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:3064
- C:\Users\Admin\AppData\Local\Temp\MT103_Ref001293838 Confirmation transfer Copy.exe
  "C:\Users\Admin\AppData\Local\Temp\MT103_Ref001293838 Confirmation transfer Copy.exe"
  2⤵
  - Checks computer location settings
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1496
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe"
    3⤵
    PID:3452
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout 10
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4476
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 10
      4⤵
      Delays execution with timeout.exe
      PID:2272
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:1880
- C:\Windows\SysWOW64\rundll32.exe
  "C:\Windows\SysWOW64\rundll32.exe"
  2⤵
  - Adds policy 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
  - System policy modification
  PID:4432
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
    3⤵
    PID:3984
- - 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:2288

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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memory/1496-132-0x0000000006710000-0x0000000006CB4000-memory.dmp

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memory/1496-133-0x0000000006160000-0x00000000061F2000-memory.dmp

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memory/1496-130-0x0000000000820000-0x0000000000838000-memory.dmp

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memory/1880-143-0x0000000000400000-0x000000000042B000-memory.dmp

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memory/1880-137-0x0000000000400000-0x000000000042B000-memory.dmp

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memory/1880-139-0x0000000002D90000-0x00000000030DA000-memory.dmp

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memory/1880-140-0x0000000002BF0000-0x0000000002C01000-memory.dmp

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memory/3064-141-0x0000000003400000-0x00000000034B3000-memory.dmp

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memory/3064-150-0x00000000082B0000-0x0000000008380000-memory.dmp

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memory/3064-151-0x00000000082B0000-0x0000000008380000-memory.dmp

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memory/4432-145-0x0000000000410000-0x000000000043B000-memory.dmp

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memory/4432-144-0x0000000000620000-0x0000000000634000-memory.dmp

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memory/4432-147-0x0000000002250000-0x000000000259A000-memory.dmp

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memory/4432-149-0x00000000020E0000-0x0000000002170000-memory.dmp

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memory/4432-148-0x0000000000410000-0x000000000043B000-memory.dmp

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