xworm | 9618961af8c6db27588c649679634bec7ece8fabd3e48f02f33ac0b837b56d2e

Analysis

max time kernel
145s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
15-07-2024 16:14

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General

Target

zvgfd-main/VIrus removal tool.exe
Size

45KB
MD5

b344b8f34ca3a4ac945c8fa4db093398
SHA1

4386aaae50411757e7d637b3f5ca86ee6f888546
SHA256

976e85307a34104c12c1f1f1949358b3091c2dd7fd9447d6ea58b1e9e4ad1db2
SHA512

e4ab61d9fe07a2eae6e4a0c0b3723d2871fd857bd64927b4776ee44af2b85f73c95082b14c30a2379e0d306787bfa562d286b4abdce3acd65e7679811166e743
SSDEEP

768:/J0rOYAa9+T4g+dCrJEcNcuqlVvD4xeVhKfkvLbFEPa9pvK6iOCh4zjif4B:/cXAaPoJRaFlZrOM/FJ9NK6iOC2egB

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

75.24.104.157:4782

Attributes

Install_directory
%Public%
install_file
$~PubUpdate.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral22/memory/3452-1-0x0000000000280000-0x0000000000298000-memory.dmp	family_xworm
behavioral22/files/0x000d0000000233ea-59.dat	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
1424	powershell.exe
3948	powershell.exe
1920	powershell.exe
2432	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-1-5-21-464762018-485119342-1613148473-1000\Control Panel\International\Geo\Nation	VIrus removal tool.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$~PubUpdate.lnk	VIrus removal tool.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$~PubUpdate.lnk	VIrus removal tool.exe

Executes dropped EXE 2 IoCs

pid	Process
4576	$~PubUpdate.exe
464	$~PubUpdate.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-1-5-21-464762018-485119342-1613148473-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\$~PubUpdate = "C:\\Users\\Public\\$~PubUpdate.exe"	VIrus removal tool.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
1	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
4236	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2432	powershell.exe
2432	powershell.exe
1424	powershell.exe
1424	powershell.exe
3948	powershell.exe
3948	powershell.exe
1920	powershell.exe
1920	powershell.exe
3452	VIrus removal tool.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	3452	VIrus removal tool.exe
Token: SeDebugPrivilege	2432	powershell.exe
Token: SeDebugPrivilege	1424	powershell.exe
Token: SeDebugPrivilege	3948	powershell.exe
Token: SeDebugPrivilege	1920	powershell.exe
Token: SeDebugPrivilege	3452	VIrus removal tool.exe
Token: SeDebugPrivilege	4576	$~PubUpdate.exe
Token: SeDebugPrivilege	464	$~PubUpdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3452	VIrus removal tool.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3452 wrote to memory of 2432	3452	VIrus removal tool.exe	84
PID 3452 wrote to memory of 2432	3452	VIrus removal tool.exe	84
PID 3452 wrote to memory of 1424	3452	VIrus removal tool.exe	86
PID 3452 wrote to memory of 1424	3452	VIrus removal tool.exe	86
PID 3452 wrote to memory of 3948	3452	VIrus removal tool.exe	88
PID 3452 wrote to memory of 3948	3452	VIrus removal tool.exe	88
PID 3452 wrote to memory of 1920	3452	VIrus removal tool.exe	90
PID 3452 wrote to memory of 1920	3452	VIrus removal tool.exe	90
PID 3452 wrote to memory of 4236	3452	VIrus removal tool.exe	92
PID 3452 wrote to memory of 4236	3452	VIrus removal tool.exe	92

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\zvgfd-main\VIrus removal tool.exe
"C:\Users\Admin\AppData\Local\Temp\zvgfd-main\VIrus removal tool.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:3452
- 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\zvgfd-main\VIrus removal tool.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2432
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'VIrus removal tool.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1424
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Public\$~PubUpdate.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3948
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '$~PubUpdate.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1920
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "$~PubUpdate" /tr "C:\Users\Public\$~PubUpdate.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4236

C:\Users\Public\$~PubUpdate.exe
C:\Users\Public\$~PubUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4576

C:\Users\Public\$~PubUpdate.exe
C:\Users\Public\$~PubUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:464

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\$~PubUpdate.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
bd5940f08d0be56e65e5f2aaf47c538e

SHA1
d7e31b87866e5e383ab5499da64aba50f03e8443

SHA256
2d2f364c75bd2897504249f42cdf1d19374f5230aad68fa9154ea3d03e3031a6

SHA512
c34d10c7e07da44a180fae9889b61f08903aa84e8ddfa80c31c272b1ef9d491b8cec6b8a4c836c3cb1583fe8f4955c6a8db872515de3a9e10eae09610c959406

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

Filesize
944B

MD5
e60eb305a7b2d9907488068b7065abd3

SHA1
1643dd7f915ac50c75bc01c53d68c5dafb9ce28d

SHA256
ad07460e061642c0dd4e7dfa7b821aacce873e290389e72f708e9f3504f9d135

SHA512
95c45afec6fa4e0b2a21edd10a6b2dc30568810c67bc9bc34d98ab111c48261f377a370583adb27e08616b0108026c119493b1b093b52ce931117e646b46cb7b

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

Filesize
944B

MD5
83685d101174171875b4a603a6c2a35c

SHA1
37be24f7c4525e17fa18dbd004186be3a9209017

SHA256
0c557845aab1da497bbff0e8fbe65cabf4cb2804b97ba8ae8c695a528af70870

SHA512
005a97a8e07b1840abdcef86a7881fd9bdc8acbfdf3eafe1dceb6374060626d81d789e57d87ca4096a39e28d5cca00f8945edff0a747591691ae75873d2b3fb5

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_inrbtrkj.15x.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Public\$~PubUpdate.exe

Filesize
75KB

MD5
4a278897dd4705dbf767fe27b1b17b18

SHA1
afd91c06a4f24fb53899a114b63269e0b3ab970a

SHA256
09d25b747f3fb7e4f2c19c50e39a8c18b1b6f01d27023e8a955f45902ded41e0

SHA512
b93d6353f6cb77829a5ec111a30c2dab62ba58b1550cf624ea1f58f301fab3ae8ca4423181d5b43abcf6f9fd085c35bfa6f43b4f92e82bc80910682a1c58ebbd

Download Submit
memory/2432-9-0x000002BB36BF0000-0x000002BB36C12000-memory.dmp

Filesize
136KB

Download
memory/2432-18-0x00007FF999950000-0x00007FF99A411000-memory.dmp

Filesize
10.8MB

Download
memory/2432-15-0x00007FF999950000-0x00007FF99A411000-memory.dmp

Filesize
10.8MB

Download
memory/2432-14-0x00007FF999950000-0x00007FF99A411000-memory.dmp

Filesize
10.8MB

Download
memory/2432-3-0x00007FF999950000-0x00007FF99A411000-memory.dmp

Filesize
10.8MB

Download
memory/3452-0-0x00007FF999953000-0x00007FF999955000-memory.dmp

Filesize
8KB

Download
memory/3452-57-0x00007FF999953000-0x00007FF999955000-memory.dmp

Filesize
8KB

Download
memory/3452-58-0x00007FF999950000-0x00007FF99A411000-memory.dmp

Filesize
10.8MB

Download
memory/3452-2-0x00007FF999950000-0x00007FF99A411000-memory.dmp

Filesize
10.8MB

Download
memory/3452-1-0x0000000000280000-0x0000000000298000-memory.dmp

Filesize
96KB

Download