xworm | adab3bc3b5ff06815461229d47960f67233e74a6e7771b80849956d8a1f3f603

Resubmissions

16-11-2024 03:38

241116-d7cnfsylhx 10

16-11-2024 03:34

241116-d46r5aylfy 10

Analysis

max time kernel
300s
max time network
293s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
16-11-2024 03:34

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General

Target

Calesial.exe
Size

167KB
MD5

dc87a72941b6080c4734c0c5d1ddd639
SHA1

2c28fcaf49352ed9eeb39137c1157831d3f4bb14
SHA256

adab3bc3b5ff06815461229d47960f67233e74a6e7771b80849956d8a1f3f603
SHA512

122e2dc75d332b507c0f33cc8a1726b475bc6552279b1a64acba55b939ac8c3760933b13f46842096c23a5d604bc2af1bf2dc3dc224ebc8ea8db8f2eefd92e9f
SSDEEP

3072:BAFLeHHWR38aZWbVQSobUzLOD57uvBz65/M6If+3Js+3JFkKeTnX:qlBWbmSbvxBt25

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

forums-advancement.gl.at.ply.gg:58291

Attributes

Install_directory
%Temp%
install_file
1336ffb22842d595e7ee3602982.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/1452-1-0x00000000007B0000-0x00000000007E0000-memory.dmp	family_xworm
behavioral1/files/0x002c000000045092-61.dat	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
xworm

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
3472	powershell.exe
4120	powershell.exe
3100	powershell.exe
3052	powershell.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-1-5-21-1361837696-2276465416-1936241636-1000\Control Panel\International\Geo\Nation	Calesial.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\1336ffb22842d595e7ee3602982.lnk	Calesial.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\1336ffb22842d595e7ee3602982.lnk	Calesial.exe

Executes dropped EXE 5 IoCs

pid	Process
4524	1336ffb22842d595e7ee3602982.exe
4324	1336ffb22842d595e7ee3602982.exe
772	1336ffb22842d595e7ee3602982.exe
4164	1336ffb22842d595e7ee3602982.exe
948	1336ffb22842d595e7ee3602982.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1361837696-2276465416-1936241636-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\1336ffb22842d595e7ee3602982 = "C:\\Users\\Admin\\AppData\\Local\\Temp\\1336ffb22842d595e7ee3602982.exe"	Calesial.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
15	ip-api.com

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

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
1868	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
3472	powershell.exe
3472	powershell.exe
4120	powershell.exe
4120	powershell.exe
3100	powershell.exe
3100	powershell.exe
3052	powershell.exe
3052	powershell.exe
1452	Calesial.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1452	Calesial.exe
Token: SeDebugPrivilege	3472	powershell.exe
Token: SeIncreaseQuotaPrivilege	3472	powershell.exe
Token: SeSecurityPrivilege	3472	powershell.exe
Token: SeTakeOwnershipPrivilege	3472	powershell.exe
Token: SeLoadDriverPrivilege	3472	powershell.exe
Token: SeSystemProfilePrivilege	3472	powershell.exe
Token: SeSystemtimePrivilege	3472	powershell.exe
Token: SeProfSingleProcessPrivilege	3472	powershell.exe
Token: SeIncBasePriorityPrivilege	3472	powershell.exe
Token: SeCreatePagefilePrivilege	3472	powershell.exe
Token: SeBackupPrivilege	3472	powershell.exe
Token: SeRestorePrivilege	3472	powershell.exe
Token: SeShutdownPrivilege	3472	powershell.exe
Token: SeDebugPrivilege	3472	powershell.exe
Token: SeSystemEnvironmentPrivilege	3472	powershell.exe
Token: SeRemoteShutdownPrivilege	3472	powershell.exe
Token: SeUndockPrivilege	3472	powershell.exe
Token: SeManageVolumePrivilege	3472	powershell.exe
Token: 33	3472	powershell.exe
Token: 34	3472	powershell.exe
Token: 35	3472	powershell.exe
Token: 36	3472	powershell.exe
Token: SeDebugPrivilege	4120	powershell.exe
Token: SeIncreaseQuotaPrivilege	4120	powershell.exe
Token: SeSecurityPrivilege	4120	powershell.exe
Token: SeTakeOwnershipPrivilege	4120	powershell.exe
Token: SeLoadDriverPrivilege	4120	powershell.exe
Token: SeSystemProfilePrivilege	4120	powershell.exe
Token: SeSystemtimePrivilege	4120	powershell.exe
Token: SeProfSingleProcessPrivilege	4120	powershell.exe
Token: SeIncBasePriorityPrivilege	4120	powershell.exe
Token: SeCreatePagefilePrivilege	4120	powershell.exe
Token: SeBackupPrivilege	4120	powershell.exe
Token: SeRestorePrivilege	4120	powershell.exe
Token: SeShutdownPrivilege	4120	powershell.exe
Token: SeDebugPrivilege	4120	powershell.exe
Token: SeSystemEnvironmentPrivilege	4120	powershell.exe
Token: SeRemoteShutdownPrivilege	4120	powershell.exe
Token: SeUndockPrivilege	4120	powershell.exe
Token: SeManageVolumePrivilege	4120	powershell.exe
Token: 33	4120	powershell.exe
Token: 34	4120	powershell.exe
Token: 35	4120	powershell.exe
Token: 36	4120	powershell.exe
Token: SeDebugPrivilege	3100	powershell.exe
Token: SeIncreaseQuotaPrivilege	3100	powershell.exe
Token: SeSecurityPrivilege	3100	powershell.exe
Token: SeTakeOwnershipPrivilege	3100	powershell.exe
Token: SeLoadDriverPrivilege	3100	powershell.exe
Token: SeSystemProfilePrivilege	3100	powershell.exe
Token: SeSystemtimePrivilege	3100	powershell.exe
Token: SeProfSingleProcessPrivilege	3100	powershell.exe
Token: SeIncBasePriorityPrivilege	3100	powershell.exe
Token: SeCreatePagefilePrivilege	3100	powershell.exe
Token: SeBackupPrivilege	3100	powershell.exe
Token: SeRestorePrivilege	3100	powershell.exe
Token: SeShutdownPrivilege	3100	powershell.exe
Token: SeDebugPrivilege	3100	powershell.exe
Token: SeSystemEnvironmentPrivilege	3100	powershell.exe
Token: SeRemoteShutdownPrivilege	3100	powershell.exe
Token: SeUndockPrivilege	3100	powershell.exe
Token: SeManageVolumePrivilege	3100	powershell.exe
Token: 33	3100	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1452	Calesial.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1452 wrote to memory of 3472	1452	Calesial.exe	89
PID 1452 wrote to memory of 3472	1452	Calesial.exe	89
PID 1452 wrote to memory of 4120	1452	Calesial.exe	93
PID 1452 wrote to memory of 4120	1452	Calesial.exe	93
PID 1452 wrote to memory of 3100	1452	Calesial.exe	97
PID 1452 wrote to memory of 3100	1452	Calesial.exe	97
PID 1452 wrote to memory of 3052	1452	Calesial.exe	99
PID 1452 wrote to memory of 3052	1452	Calesial.exe	99
PID 1452 wrote to memory of 1868	1452	Calesial.exe	101
PID 1452 wrote to memory of 1868	1452	Calesial.exe	101

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\Calesial.exe
"C:\Users\Admin\AppData\Local\Temp\Calesial.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1452
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Calesial.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3472
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Calesial.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4120
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\1336ffb22842d595e7ee3602982.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3100
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '1336ffb22842d595e7ee3602982.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:3052
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "1336ffb22842d595e7ee3602982" /tr "C:\Users\Admin\AppData\Local\Temp\1336ffb22842d595e7ee3602982.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1868

C:\Users\Admin\AppData\Local\Temp\1336ffb22842d595e7ee3602982.exe
"C:\Users\Admin\AppData\Local\Temp\1336ffb22842d595e7ee3602982.exe"
1⤵
- Executes dropped EXE
PID:4524

C:\Users\Admin\AppData\Local\Temp\1336ffb22842d595e7ee3602982.exe
"C:\Users\Admin\AppData\Local\Temp\1336ffb22842d595e7ee3602982.exe"
1⤵
- Executes dropped EXE
PID:4324

C:\Users\Admin\AppData\Local\Temp\1336ffb22842d595e7ee3602982.exe
"C:\Users\Admin\AppData\Local\Temp\1336ffb22842d595e7ee3602982.exe"
1⤵
- Executes dropped EXE
PID:772

C:\Users\Admin\AppData\Local\Temp\1336ffb22842d595e7ee3602982.exe
"C:\Users\Admin\AppData\Local\Temp\1336ffb22842d595e7ee3602982.exe"
1⤵
- Executes dropped EXE
PID:4164

C:\Users\Admin\AppData\Local\Temp\1336ffb22842d595e7ee3602982.exe
"C:\Users\Admin\AppData\Local\Temp\1336ffb22842d595e7ee3602982.exe"
1⤵
- Executes dropped EXE
PID:948

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\1336ffb22842d595e7ee3602982.exe.log

Filesize
654B

MD5
11c6e74f0561678d2cf7fc075a6cc00c

SHA1
535ee79ba978554abcb98c566235805e7ea18490

SHA256
d39a78fabca39532fcb85ce908781a75132e1bd01cc50a3b290dd87127837d63

SHA512
32c63d67bf512b42e7f57f71287b354200126cb417ef9d869c72e0b9388a7c2f5e3b61f303f1353baa1bf482d0f17e06e23c9f50b2f1babd4d958b6da19c40b0

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
3KB

MD5
3eb3833f769dd890afc295b977eab4b4

SHA1
e857649b037939602c72ad003e5d3698695f436f

SHA256
c485a6e2fd17c342fca60060f47d6a5655a65a412e35e001bb5bf88d96e6e485

SHA512
c24bbc8f278478d43756807b8c584d4e3fb2289db468bc92986a489f74a8da386a667a758360a397e77e018e363be8912ac260072fa3e31117ad0599ac749e72

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
f0f59cccd39a3694e0e6dfd44d0fa76d

SHA1
fccd7911d463041e1168431df8823e4c4ea387c1

SHA256
70466c7f3a911368d653396fdd68f993322c69e1797b492ca00f8be34b7f3401

SHA512
5c726e1e28cb9c0c3ab963fbfbf471c6033839f3e535a3811581fdaa4da17175e5a8a8be84a4fccd99b81e048058e51d230ff3836e3ec920057a1b1676110bee

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
6377ff3fe79652ea0f1fcf06b5c59e02

SHA1
3355e9ab8f8f8a179ac322e4f8743842a7abd1a5

SHA256
4ee240eb0edc48dec55f8e2ed337425dcebc25d0b3d54c8ad6f99c951d2e444b

SHA512
5a125ef86bb7878952393432db7d5c96557c5edffa14b3924e0b08315ebb4418fa5e57240d2a21043a06568a1d4c8c7bb671462b660e89af850822fd3c7cf546

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
14cd92246fda5a83168f7c50c6f40efc

SHA1
da4d7bc90a6b820945e31bb0589f44cccdeda780

SHA256
d33f0c05c6c271bcd9fc92684ee0899821c709ea2c499af9a681f38154c9d66d

SHA512
ac47cfdfe1ee372b40ea4a93f34ccfc6a2f2a5c8132da1eaf2103f74f54197235ac63dde12024eb89ecaef416bac585491bbeca0e666e9e0ee9b3fc34affc453

Download Submit
C:\Users\Admin\AppData\Local\Temp\1336ffb22842d595e7ee3602982.exe

Filesize
167KB

MD5
dc87a72941b6080c4734c0c5d1ddd639

SHA1
2c28fcaf49352ed9eeb39137c1157831d3f4bb14

SHA256
adab3bc3b5ff06815461229d47960f67233e74a6e7771b80849956d8a1f3f603

SHA512
122e2dc75d332b507c0f33cc8a1726b475bc6552279b1a64acba55b939ac8c3760933b13f46842096c23a5d604bc2af1bf2dc3dc224ebc8ea8db8f2eefd92e9f

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_lvuf5byw.rs3.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1452-1-0x00000000007B0000-0x00000000007E0000-memory.dmp

Filesize
192KB

Download
memory/1452-2-0x00007FFAE29D0000-0x00007FFAE3492000-memory.dmp

Filesize
10.8MB

Download
memory/1452-0-0x00007FFAE29D3000-0x00007FFAE29D5000-memory.dmp

Filesize
8KB

Download
memory/1452-45-0x00007FFAE29D0000-0x00007FFAE3492000-memory.dmp

Filesize
10.8MB

Download
memory/3472-4-0x00007FFAE29D0000-0x00007FFAE3492000-memory.dmp

Filesize
10.8MB

Download
memory/3472-20-0x00007FFAE29D0000-0x00007FFAE3492000-memory.dmp

Filesize
10.8MB

Download
memory/3472-17-0x00007FFAE29D0000-0x00007FFAE3492000-memory.dmp

Filesize
10.8MB

Download
memory/3472-16-0x00007FFAE29D0000-0x00007FFAE3492000-memory.dmp

Filesize
10.8MB

Download
memory/3472-15-0x00007FFAE29D0000-0x00007FFAE3492000-memory.dmp

Filesize
10.8MB

Download
memory/3472-10-0x000001F851F80000-0x000001F851FA2000-memory.dmp

Filesize
136KB

Download
memory/3472-3-0x00007FFAE29D0000-0x00007FFAE3492000-memory.dmp

Filesize
10.8MB

Download
memory/4120-33-0x0000018D667F0000-0x0000018D66A0D000-memory.dmp

Filesize
2.1MB

Download