xworm | 8d4e23ba1ce9eab2340bad5e14111dc565bbe8de53653375ac3806f448dcc0ac

Analysis

max time kernel
30s
max time network
31s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
24/05/2024, 18:40

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General

Target
OverwolfXclient.exe
Size 1.2MB
Sample240524-xbmnbsfa4x
SHA256 8d4e23ba1ce9eab2340bad5e14111dc565bbe8de53653375ac3806f448dcc0ac
MD5 c08106fd9c5999388d5e541743d45d5b
SHA1 571f4333cd757db2870e2459724b545e43ffcc11
SHA512 65c2e544e88b63e8d1216731be75f0407784d620af1b2dfa649eb87e9e6408ffa43a3697a94c8d4cf6cc9f8dfc83a0a824397ac75bbdde9fe3440802117e8261
SSDEEP 24576:908rin0gKu22AcpyGCcCBSrikukOqk344WIGu31rg:908rin0gKu22AcpyGC9kTOK4WIGWg
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

127.0.0.1:7777
45.145.41.147:7777

Mutex

5N4ZirqATbPp1e8c

Attributes

Install_directory
%ProgramData%
install_file
WinBackup.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/2532-6-0x0000000000400000-0x0000000000412000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat 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
1264	powershell.exe
1008	powershell.exe
3248	powershell.exe
3660	powershell.exe

Drops startup file 3 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\%startupname%.lnk	OverwolfXclient.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\WinBackup.lnk	MSBuild.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\WinBackup.lnk	MSBuild.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-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WinBackup = "C:\\ProgramData\\WinBackup.exe"	MSBuild.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
23	ip-api.com

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2360 set thread context of 2532	2360	OverwolfXclient.exe	82

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
2828	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
3248	powershell.exe
3248	powershell.exe
3660	powershell.exe
3660	powershell.exe
1264	powershell.exe
1264	powershell.exe
1008	powershell.exe
1008	powershell.exe
2532	MSBuild.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	2532	MSBuild.exe
Token: SeDebugPrivilege	3248	powershell.exe
Token: SeDebugPrivilege	3660	powershell.exe
Token: SeDebugPrivilege	1264	powershell.exe
Token: SeDebugPrivilege	1008	powershell.exe
Token: SeDebugPrivilege	2532	MSBuild.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2532	MSBuild.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2360 wrote to memory of 2532	2360	OverwolfXclient.exe	82
PID 2360 wrote to memory of 2532	2360	OverwolfXclient.exe	82
PID 2360 wrote to memory of 2532	2360	OverwolfXclient.exe	82
PID 2360 wrote to memory of 2532	2360	OverwolfXclient.exe	82
PID 2360 wrote to memory of 2532	2360	OverwolfXclient.exe	82
PID 2360 wrote to memory of 2532	2360	OverwolfXclient.exe	82
PID 2360 wrote to memory of 2532	2360	OverwolfXclient.exe	82
PID 2360 wrote to memory of 2532	2360	OverwolfXclient.exe	82
PID 2532 wrote to memory of 3248	2532	MSBuild.exe	94
PID 2532 wrote to memory of 3248	2532	MSBuild.exe	94
PID 2532 wrote to memory of 3248	2532	MSBuild.exe	94
PID 2532 wrote to memory of 3660	2532	MSBuild.exe	97
PID 2532 wrote to memory of 3660	2532	MSBuild.exe	97
PID 2532 wrote to memory of 3660	2532	MSBuild.exe	97
PID 2532 wrote to memory of 1264	2532	MSBuild.exe	101
PID 2532 wrote to memory of 1264	2532	MSBuild.exe	101
PID 2532 wrote to memory of 1264	2532	MSBuild.exe	101
PID 2532 wrote to memory of 1008	2532	MSBuild.exe	103
PID 2532 wrote to memory of 1008	2532	MSBuild.exe	103
PID 2532 wrote to memory of 1008	2532	MSBuild.exe	103
PID 2532 wrote to memory of 2828	2532	MSBuild.exe	105
PID 2532 wrote to memory of 2828	2532	MSBuild.exe	105
PID 2532 wrote to memory of 2828	2532	MSBuild.exe	105

C:\Users\Admin\AppData\Local\Temp\OverwolfXclient.exe
"C:\Users\Admin\AppData\Local\Temp\OverwolfXclient.exe"
1⤵
- Drops startup file
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2360
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
  2⤵
  - 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:2532
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3248
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'MSBuild.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3660
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\WinBackup.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1264
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'WinBackup.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1008
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "WinBackup" /tr "C:\ProgramData\WinBackup.exe"
    3⤵
    - Creates scheduled task(s)
    PID:2828

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log
Size 2KB
SHA256 92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a
MD5 968cb9309758126772781b83adb8a28f
SHA1 8da30e71accf186b2ba11da1797cf67f8f78b47c
SHA512 4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 18KB
SHA256 b19e4c1f537ea4d18f46c41ab2baeda6996990e01129ae550ecdc70c5ca70dfb
MD5 06f27890f353bb46f8e6641bc5c0c503
SHA1 cd9df011cb171c7f60b8d798e43132b5b5740ba8
SHA512 5919e3e32721c3471b2d4b9c765b250c0334a3c475478610ac0ac6a8c4952b3a35791aa3cda3e2b6674d216a77e86ac3a1db2fb8cb9a54d791e53db650cfedf1
SSDEEP 384:Yi+BY9i+J8IlBbdFBZkH209oSRTaY19bGZcifE6x5ZdqkSJ+nUmVkki0SO1:hL/Hg3oSRTaAlifxx5ZdqcUmiki0H
MD5 SHA1 SHA512 SSDEEP

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 18KB
SHA256 e78e196d82a65c743f4814f6d914c221bd06fe5a602cfd004b762af2fdd03862
MD5 f26066224db683e0af0a4fba9da2a8ed
SHA1 cf8a949c87ace43a44d46e24fbe1e812d2c9bbe9
SHA512 a96db0efd0be61b961a14d417364b12c0bd848badaabc29443567d33085f6d5f8b67eec6e915499f3388c10af93c120ee396a94a4b81aa8dd4d8babd5feaa8c7
SSDEEP 384:Usf+BE9i+2X9aBiiYIuo9o2ThK6seYwME/h03SoZJfYSg0jEDkeQ0gdItkKhD:hf4Xso6To2ThNfrqSMWKEDjCq3
MD5 SHA1 SHA512 SSDEEP

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 18KB
SHA256 8090a64a4ce7d66a9052b2f7737a2f4bd4f6e6a4ecb3afe0fc821801530a7931
MD5 4b3b733624a0d26134848387c5140018
SHA1 6fb079d4e114965c7c82d06d820e6b58014b3129
SHA512 f8246e5f65929031533488afb032599372030704f78e0c7163e0a1d837556d4771107d057e3932b348a495df3993ebd962298f969d766e49c722e0ce1e4ad81f
SSDEEP 384:76+BE98h/7ypv0veCo9o5kY19LGZcYEz+FIYjq+nUeVhi0SO1:O+Tyh7Xo5kAVYxFIYTUeri0H
MD5 SHA1 SHA512 SSDEEP

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__PSScriptPolicyTest_lrgylrll.zcq.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_lrgylrll.zcq.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/1008-108-0x000000006FD00000-0x000000006FD4C000-memory.dmp

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memory/1264-87-0x000000006FD00000-0x000000006FD4C000-memory.dmp

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memory/2360-1-0x0000000000A30000-0x0000000000B6A000-memory.dmp

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memory/2360-2-0x00000000053F0000-0x000000000548C000-memory.dmp

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memory/2360-3-0x0000000005A40000-0x0000000005FE4000-memory.dmp

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memory/2360-5-0x0000000006210000-0x00000000062C6000-memory.dmp

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memory/2360-0-0x0000000074C8E000-0x0000000074C8F000-memory.dmp

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memory/2532-6-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/2532-123-0x0000000006B20000-0x0000000006BB2000-memory.dmp

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memory/2532-124-0x0000000006E20000-0x0000000006E2A000-memory.dmp

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memory/2532-125-0x0000000074C80000-0x0000000075430000-memory.dmp

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memory/2532-126-0x0000000074C80000-0x0000000075430000-memory.dmp

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memory/2532-10-0x0000000074C80000-0x0000000075430000-memory.dmp

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memory/2532-9-0x0000000005960000-0x00000000059C6000-memory.dmp

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memory/2532-8-0x0000000074C80000-0x0000000075430000-memory.dmp

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memory/3248-41-0x00000000066D0000-0x00000000066EE000-memory.dmp

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memory/3248-54-0x0000000074C80000-0x0000000075430000-memory.dmp

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memory/3248-30-0x00000000072B0000-0x00000000072E2000-memory.dmp

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memory/3248-42-0x00000000072F0000-0x0000000007393000-memory.dmp

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memory/3248-43-0x0000000007A50000-0x00000000080CA000-memory.dmp

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memory/3248-44-0x0000000007410000-0x000000000742A000-memory.dmp

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memory/3248-45-0x0000000007470000-0x000000000747A000-memory.dmp

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memory/3248-46-0x00000000076A0000-0x0000000007736000-memory.dmp

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memory/3248-47-0x0000000007610000-0x0000000007621000-memory.dmp

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memory/3248-48-0x0000000007640000-0x000000000764E000-memory.dmp

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memory/3248-49-0x0000000007650000-0x0000000007664000-memory.dmp

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memory/3248-50-0x0000000007760000-0x000000000777A000-memory.dmp

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memory/3248-51-0x0000000007690000-0x0000000007698000-memory.dmp

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memory/3248-31-0x000000006FD00000-0x000000006FD4C000-memory.dmp

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memory/3248-29-0x0000000006120000-0x000000000616C000-memory.dmp

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memory/3248-28-0x00000000060E0000-0x00000000060FE000-memory.dmp

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memory/3248-11-0x0000000004B40000-0x0000000004B76000-memory.dmp

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memory/3248-27-0x0000000005C40000-0x0000000005F94000-memory.dmp

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memory/3248-17-0x00000000059F0000-0x0000000005A56000-memory.dmp

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memory/3248-15-0x0000000005950000-0x0000000005972000-memory.dmp

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memory/3248-16-0x0000000074C80000-0x0000000075430000-memory.dmp

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memory/3248-14-0x0000000074C80000-0x0000000075430000-memory.dmp

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memory/3248-13-0x00000000051B0000-0x00000000057D8000-memory.dmp

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memory/3248-12-0x0000000074C80000-0x0000000075430000-memory.dmp

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memory/3660-66-0x000000006FD00000-0x000000006FD4C000-memory.dmp

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