xworm | 9618961af8c6db27588c649679634bec7ece8fabd3e48f02f33ac0b837b56d2e

Analysis

max time kernel
149s
max time network
157s
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

75KB
MD5

4a278897dd4705dbf767fe27b1b17b18
SHA1

afd91c06a4f24fb53899a114b63269e0b3ab970a
SHA256

09d25b747f3fb7e4f2c19c50e39a8c18b1b6f01d27023e8a955f45902ded41e0
SHA512

b93d6353f6cb77829a5ec111a30c2dab62ba58b1550cf624ea1f58f301fab3ae8ca4423181d5b43abcf6f9fd085c35bfa6f43b4f92e82bc80910682a1c58ebbd
SSDEEP

1536:DvX+OcT29HvHHhfaAbuY1x6f7O2DTYdhmdS1EAd8IIV:7XK69JjbufO2v8ygEA6IIV

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
behavioral23/memory/2764-1-0x0000000000520000-0x0000000000538000-memory.dmp	family_xworm
behavioral23/files/0x000f00000002349d-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
856	powershell.exe
1612	powershell.exe
2400	powershell.exe
228	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-1-5-21-1750093773-264148664-1320403265-1000\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 3 IoCs

pid	Process
2708	$~PubUpdate.exe
4504	$~PubUpdate.exe
1648	$~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-1-5-21-1750093773-264148664-1320403265-1000\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
9	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
3456	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
228	powershell.exe
228	powershell.exe
856	powershell.exe
856	powershell.exe
1612	powershell.exe
1612	powershell.exe
2400	powershell.exe
2400	powershell.exe
2764	Virus removal tool.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	2764	Virus removal tool.exe
Token: SeDebugPrivilege	228	powershell.exe
Token: SeDebugPrivilege	856	powershell.exe
Token: SeDebugPrivilege	1612	powershell.exe
Token: SeDebugPrivilege	2400	powershell.exe
Token: SeDebugPrivilege	2764	Virus removal tool.exe
Token: SeDebugPrivilege	2708	$~PubUpdate.exe
Token: SeDebugPrivilege	4504	$~PubUpdate.exe
Token: SeDebugPrivilege	1648	$~PubUpdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2764	Virus removal tool.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2764 wrote to memory of 228	2764	Virus removal tool.exe	85
PID 2764 wrote to memory of 228	2764	Virus removal tool.exe	85
PID 2764 wrote to memory of 856	2764	Virus removal tool.exe	87
PID 2764 wrote to memory of 856	2764	Virus removal tool.exe	87
PID 2764 wrote to memory of 1612	2764	Virus removal tool.exe	89
PID 2764 wrote to memory of 1612	2764	Virus removal tool.exe	89
PID 2764 wrote to memory of 2400	2764	Virus removal tool.exe	91
PID 2764 wrote to memory of 2400	2764	Virus removal tool.exe	91
PID 2764 wrote to memory of 3456	2764	Virus removal tool.exe	93
PID 2764 wrote to memory of 3456	2764	Virus removal tool.exe	93

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:2764
- 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:228
- 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:856
- 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:1612
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '$~PubUpdate.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2400
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "$~PubUpdate" /tr "C:\Users\Public\$~PubUpdate.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3456

C:\Users\Public\$~PubUpdate.exe
C:\Users\Public\$~PubUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2708

C:\Users\Public\$~PubUpdate.exe
C:\Users\Public\$~PubUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4504

C:\Users\Public\$~PubUpdate.exe
C:\Users\Public\$~PubUpdate.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1648

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
cadef9abd087803c630df65264a6c81c

SHA1
babbf3636c347c8727c35f3eef2ee643dbcc4bd2

SHA256
cce65b73cdfe9304bcd5207913e8b60fb69faa20cd3b684f2b0343b755b99438

SHA512
7278aa87124abb382d9024a645e881e7b7cf1b84e8894943b36e018dbf0399e6858392f77980b599fa5488e2e21bf757a0702fe6419417edac93b68e0c2ec085

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

Filesize
944B

MD5
15dde0683cd1ca19785d7262f554ba93

SHA1
d039c577e438546d10ac64837b05da480d06bf69

SHA256
d6fa39eab7ee36f44dc3f9f2839d098433db95c1eba924e4bcf4e5c0d268d961

SHA512
57c0e1b87bc1c136f0d39f3ce64bb8f8274a0491e4ca6e45e5c7f9070aa9d9370c6f590ce37cd600b252df2638d870205249a514c43245ca7ed49017024a4672

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

Filesize
944B

MD5
cae60f0ddddac635da71bba775a2c5b4

SHA1
386f1a036af61345a7d303d45f5230e2df817477

SHA256
b2dd636b7b0d3bfe44cef5e1175828b1fa7bd84d5563f54342944156ba996c16

SHA512
28ed8a8bc132ef56971cfd7b517b17cdb74a7f8c247ef6bff232996210075e06aa58a415825a1e038cfb547ad3dc6882bf1ca1b68c5b360ef0512a1440850253

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vsxppn3o.zun.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/228-14-0x00007FFB1DD10000-0x00007FFB1E7D1000-memory.dmp

Filesize
10.8MB

Download
memory/228-15-0x00007FFB1DD10000-0x00007FFB1E7D1000-memory.dmp

Filesize
10.8MB

Download
memory/228-18-0x00007FFB1DD10000-0x00007FFB1E7D1000-memory.dmp

Filesize
10.8MB

Download
memory/228-13-0x000002C079AA0000-0x000002C079AC2000-memory.dmp

Filesize
136KB

Download
memory/228-3-0x00007FFB1DD10000-0x00007FFB1E7D1000-memory.dmp

Filesize
10.8MB

Download
memory/2764-0-0x00007FFB1DD13000-0x00007FFB1DD15000-memory.dmp

Filesize
8KB

Download
memory/2764-2-0x00007FFB1DD10000-0x00007FFB1E7D1000-memory.dmp

Filesize
10.8MB

Download
memory/2764-57-0x00007FFB1DD13000-0x00007FFB1DD15000-memory.dmp

Filesize
8KB

Download
memory/2764-58-0x00007FFB1DD10000-0x00007FFB1E7D1000-memory.dmp

Filesize
10.8MB

Download
memory/2764-1-0x0000000000520000-0x0000000000538000-memory.dmp

Filesize
96KB

Download