xworm | 9bed2d09b228519b7b0d423d96e05d45193b88f9669b3d7373ce92b8466ce072

General

Target

Setup.exe
Size

296KB
MD5

4fbc8b878d44721f4f838334ac218ca3
SHA1

ab1bbbc858c32c512f3670db42da607ff8f5d797
SHA256

9bed2d09b228519b7b0d423d96e05d45193b88f9669b3d7373ce92b8466ce072
SHA512

804ece432385d03e546d247afa9f60722458262461e669792f24bf23704779b241c2562792aeec0cf7d450d61a967515e712704f33ede2814004d97cc3adde89
SSDEEP

3072:B9UoZkSvCRLTcda4bl7gWz3vW/XhQMg2t6tqnJr:Be8kCCRLTcs4blxvWvhDGq

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

Valdemar-62425.portmap.host:62425

Attributes

Install_directory
%ProgramData%
install_file
WinSysUpdater32.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x0008000000023465-27.dat	family_xworm
behavioral2/memory/2624-29-0x0000000000610000-0x000000000062E000-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
2076	powershell.exe
3780	powershell.exe
1348	powershell.exe
4900	powershell.exe

Checks computer location settings 2 TTPs 3 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-1-5-21-1403246978-718555486-3105247137-1000\Control Panel\International\Geo\Nation	Setup.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1403246978-718555486-3105247137-1000\Control Panel\International\Geo\Nation	InspectedSetupV2.1.4.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1403246978-718555486-3105247137-1000\Control Panel\International\Geo\Nation	InspectedSetup.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\WinSysUpdater32.lnk	InspectedSetup.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\WinSysUpdater32.lnk	InspectedSetup.exe

Executes dropped EXE 4 IoCs

pid	Process
2000	InspectedSetupV2.1.4.exe
2624	InspectedSetup.exe
2332	WinSysUpdater32.exe
1672	WinSysUpdater32.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-1-5-21-1403246978-718555486-3105247137-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WinSysUpdater32 = "C:\\ProgramData\\WinSysUpdater32.exe"	InspectedSetup.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
7	ip-api.com

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

System Information Discovery
T1082

Modifies registry class 4 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1403246978-718555486-3105247137-1000_Classes\Local Settings	Setup.exe
Key created	\REGISTRY\USER\S-1-5-21-1403246978-718555486-3105247137-1000_Classes\Local Settings	InspectedSetupV2.1.4.exe
Key created	\REGISTRY\USER\S-1-5-21-1403246978-718555486-3105247137-1000_Classes\Local Settings	OpenWith.exe
Key created	\REGISTRY\USER\S-1-5-21-1403246978-718555486-3105247137-1000_Classes\Local Settings	OpenWith.exe

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
2684	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2624	InspectedSetup.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
3780	powershell.exe
3780	powershell.exe
1348	powershell.exe
1348	powershell.exe
4900	powershell.exe
4900	powershell.exe
2076	powershell.exe
2076	powershell.exe
2624	InspectedSetup.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2624	InspectedSetup.exe
Token: SeDebugPrivilege	3780	powershell.exe
Token: SeDebugPrivilege	1348	powershell.exe
Token: SeDebugPrivilege	4900	powershell.exe
Token: SeDebugPrivilege	2076	powershell.exe
Token: SeDebugPrivilege	2624	InspectedSetup.exe
Token: SeDebugPrivilege	2332	WinSysUpdater32.exe
Token: SeDebugPrivilege	1672	WinSysUpdater32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
232	OpenWith.exe
4776	OpenWith.exe
2624	InspectedSetup.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1984 wrote to memory of 2000	1984	Setup.exe	84
PID 1984 wrote to memory of 2000	1984	Setup.exe	84
PID 2000 wrote to memory of 2624	2000	InspectedSetupV2.1.4.exe	86
PID 2000 wrote to memory of 2624	2000	InspectedSetupV2.1.4.exe	86
PID 2624 wrote to memory of 3780	2624	InspectedSetup.exe	91
PID 2624 wrote to memory of 3780	2624	InspectedSetup.exe	91
PID 2624 wrote to memory of 1348	2624	InspectedSetup.exe	93
PID 2624 wrote to memory of 1348	2624	InspectedSetup.exe	93
PID 2624 wrote to memory of 4900	2624	InspectedSetup.exe	95
PID 2624 wrote to memory of 4900	2624	InspectedSetup.exe	95
PID 2624 wrote to memory of 2076	2624	InspectedSetup.exe	97
PID 2624 wrote to memory of 2076	2624	InspectedSetup.exe	97
PID 2624 wrote to memory of 2684	2624	InspectedSetup.exe	99
PID 2624 wrote to memory of 2684	2624	InspectedSetup.exe	99

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\Setup.exe
"C:\Users\Admin\AppData\Local\Temp\Setup.exe"
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1984
- C:\Users\Admin\AppData\Local\Temp\InspectedSetupV2.1.4.exe
  "C:\Users\Admin\AppData\Local\Temp\InspectedSetupV2.1.4.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2000
- - C:\Users\Admin\AppData\Roaming\InspectedSetup.exe
    "C:\Users\Admin\AppData\Roaming\InspectedSetup.exe"
    3⤵
    - Checks computer location settings
    - Drops startup file
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious behavior: AddClipboardFormatListener
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2624
  - - 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\Roaming\InspectedSetup.exe'
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3780
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'InspectedSetup.exe'
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1348
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\WinSysUpdater32.exe'
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4900
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'WinSysUpdater32.exe'
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2076
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "WinSysUpdater32" /tr "C:\ProgramData\WinSysUpdater32.exe"
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:2684

C:\Windows\system32\OpenWith.exe
C:\Windows\system32\OpenWith.exe -Embedding
1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:4776

C:\Windows\system32\OpenWith.exe
C:\Windows\system32\OpenWith.exe -Embedding
1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:232

C:\ProgramData\WinSysUpdater32.exe
C:\ProgramData\WinSysUpdater32.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2332

C:\ProgramData\WinSysUpdater32.exe
C:\ProgramData\WinSysUpdater32.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1672

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\WinSysUpdater32.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
944B

MD5
6c47b3f4e68eebd47e9332eebfd2dd4e

SHA1
67f0b143336d7db7b281ed3de5e877fa87261834

SHA256
8c48b1f2338e5b24094821f41121d2221f1cb3200338f46df49f64d1c4bc3e0c

SHA512
0acf302a9fc971ef9df65ed42c47ea17828e54dff685f4434f360556fd27cdc26a75069f00dcdc14ba174893c6fd7a2cfd8c6c07be3ce35dafee0a006914eaca

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

Filesize
944B

MD5
50d3033f2bc3a3774c469d03e71a79a9

SHA1
22027b1d52085de99b3bffa276530fea5d961471

SHA256
2987e99ec7fa17bd4ab7de3cb4dc62645e1052012a5a357904d6fc6db9054147

SHA512
ecf7ab1a9e4192454a3e24c60453fd702a8c648e00078fc933b9182f4a3d3c10c6f5da622a5729b35727e6ddc8837029caddcaf76f56e805b9744253b56da5d8

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

Filesize
944B

MD5
735388b98281cec7d063b1b470c13632

SHA1
7536ce1c5f3732fac491d7038e24124551c4290a

SHA256
843fced254477f5ad803cc98e853d7ab674852d5e94bc174497691b736d49e69

SHA512
30244c596f4c3cc0194186a210170f04985b77fc90f10cff0a2fbd07e079944e5f8c9998759219363033c450b6a4093ad1b3d75e0a0fae1aa6208a61a88a9717

Download Submit
C:\Users\Admin\AppData\Local\Temp\InspectedSetupV2.1.4.exe

Filesize
112KB

MD5
b6e3ad794d2172d8e6c909b904bccccb

SHA1
6618a1276353c6c4e4c746a190ef31098d3c9f38

SHA256
cf368edca395eeac03f42d5f902fcada7f4262802ff95631712347563d8bdb05

SHA512
a50abeec4ab2f3cdc42ddb4a852aa7ee10376cd140b607f98be4b96995d2b0b4722e2d0286133d88ccd1f4ece2dec01f79d2b8e67f93cac1d040a72cde1dd605

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_22xx33tu.3bx.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\InspectedSetup.exe

Filesize
97KB

MD5
2edb664bcabf152026fa329515a96821

SHA1
230f2c370647ba1e41498aa2efa8cba6f512642f

SHA256
6548408ffacead04d0e33df162a247f2f8542ea9c98b50698476b86380f3547b

SHA512
a65b623fe37143e0eba265d3cd80a68ecc30e836be13fc113177e4e2e40ab508c9e3a1bd1952f45b8e01bccc7a43e96ef18f41d2ea5de1bd4ab7bc67c19fef70

Download Submit
memory/1984-1-0x0000000000C40000-0x0000000000C90000-memory.dmp

Filesize
320KB

Download
memory/1984-0-0x00007FFA9FDE3000-0x00007FFA9FDE5000-memory.dmp

Filesize
8KB

Download
memory/2000-15-0x00000000000B0000-0x00000000000D2000-memory.dmp

Filesize
136KB

Download
memory/2000-32-0x00007FFA9FDE0000-0x00007FFAA08A1000-memory.dmp

Filesize
10.8MB

Download
memory/2000-83-0x00007FFA9FDE0000-0x00007FFAA08A1000-memory.dmp

Filesize
10.8MB

Download
memory/2624-29-0x0000000000610000-0x000000000062E000-memory.dmp

Filesize
120KB

Download
memory/3780-35-0x0000029B1FB10000-0x0000029B1FB32000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads