xworm | ad34f6a17ee318591b59ac4fbc300c53808630e4f163b644a58eadc85057348a

General

Target

NetCat Loader.exe
Size

76KB
MD5

1a56b39b62cff3bf7a75a708f6a11762
SHA1

180d91a57ebb95a81bfaa394bca35c123efa916e
SHA256

ad34f6a17ee318591b59ac4fbc300c53808630e4f163b644a58eadc85057348a
SHA512

b86dfa4287e283fd7e734cc3897589c2bb6b98e35f1c82a6ab50f271baf8a9748a125a6c04425ccdf93566ddacb453290a9a63e5fc0d2797b70fb70b6dac03fb
SSDEEP

1536:JqDtM7DwroXh9bSQ6/jyrV9nmRWnXzWb6Alyj:EwblSlryrV9nmwPeyj

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

C2

194.59.31.87:1111

Attributes

install_file
USB.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000c000000012263-4.dat	family_xworm
behavioral2/memory/2948-8-0x0000000001060000-0x0000000001076000-memory.dmp	family_xworm

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

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
2692	powershell.exe
2576	powershell.exe

Executes dropped EXE 1 IoCs

pid	Process
2948	System32.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
4	ip-api.com

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

System Information Discovery
T1082

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2948	System32.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2692	powershell.exe
2576	powershell.exe
736	powershell.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2948	System32.exe
Token: SeDebugPrivilege	2692	powershell.exe
Token: SeDebugPrivilege	2576	powershell.exe
Token: SeDebugPrivilege	2948	System32.exe
Token: SeDebugPrivilege	736	powershell.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2516 wrote to memory of 2948	2516	NetCat Loader.exe	30
PID 2516 wrote to memory of 2948	2516	NetCat Loader.exe	30
PID 2516 wrote to memory of 2948	2516	NetCat Loader.exe	30
PID 2516 wrote to memory of 2052	2516	NetCat Loader.exe	31
PID 2516 wrote to memory of 2052	2516	NetCat Loader.exe	31
PID 2516 wrote to memory of 2052	2516	NetCat Loader.exe	31
PID 2948 wrote to memory of 2692	2948	System32.exe	33
PID 2948 wrote to memory of 2692	2948	System32.exe	33
PID 2948 wrote to memory of 2692	2948	System32.exe	33
PID 2948 wrote to memory of 2576	2948	System32.exe	35
PID 2948 wrote to memory of 2576	2948	System32.exe	35
PID 2948 wrote to memory of 2576	2948	System32.exe	35
PID 2948 wrote to memory of 592	2948	System32.exe	38
PID 2948 wrote to memory of 592	2948	System32.exe	38
PID 2948 wrote to memory of 592	2948	System32.exe	38
PID 592 wrote to memory of 736	592	cmd.exe	40
PID 592 wrote to memory of 736	592	cmd.exe	40
PID 592 wrote to memory of 736	592	cmd.exe	40
PID 736 wrote to memory of 1604	736	powershell.exe	42
PID 736 wrote to memory of 1604	736	powershell.exe	42
PID 736 wrote to memory of 1604	736	powershell.exe	42

C:\Users\Admin\AppData\Local\Temp\NetCat Loader.exe
"C:\Users\Admin\AppData\Local\Temp\NetCat Loader.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2516
- C:\Users\Admin\AppData\Roaming\System32.exe
  "C:\Users\Admin\AppData\Roaming\System32.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2948
- - 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\System32.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2692
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'System32.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2576
- - C:\Windows\system32\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\ufxdov.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:592
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      powershell.exe "if ((Get-WmiObject Win32_DiskDrive | Select-Object -ExpandProperty Model | findstr /i 'WDS100T2B0A') -and (-not (Get-ChildItem -Path F:\ -Recurse | Where-Object { -not $_.PSIsContainer } | Measure-Object).Count)) {exit 900} else {exit 1}"
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:736
    - - C:\Windows\system32\findstr.exe
        
        "C:\Windows\system32\findstr.exe" /i WDS100T2B0A
        5⤵
        
        PID:1604
- C:\Windows\system32\NOTEPAD.EXE
  "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\Thanks For Using.txt
  2⤵
  PID:2052

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\ufxdov.bat

Filesize
5.5MB

MD5
b232c2818e9772e6a7644419ebeeca03

SHA1
49e8be96ce0e3a5e0470ca915d2083e85de74326

SHA256
a4eb237e02f7f3e171b3f42c19e4b581e8665dd7ba23f8270e83947055f12b7a

SHA512
f939dfddd99a0ae366d431890fa0b144f073506836ce266c313d5a0c088a045cd96ffd22c5900f697fd127c95723632e5d5ffb5c570a46ce63759974b81ff962

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
93d49d05101a4b8dd557dea587c7dd13

SHA1
9b578815d3f6f38095f91fc9cadbec89f73584c3

SHA256
16ea9efed3fb520829bf2a08f1578e3886b1e7724faac50e44e0c94c3b97b073

SHA512
940b355fd5588b0e92bd2117591d4c520d85d3ec01d9abbb1a87ec6b244aaf4b2b2995c656f3a023dbbd2dbd932539f9efbf87c020b0adfe261805390f457dde

Download Submit
C:\Users\Admin\AppData\Roaming\System32.exe

Filesize
63KB

MD5
66bbe5829a613fedad7f79e2c6273448

SHA1
57314396a65e08b7bfc5f0b8cdfa9a050579d9d9

SHA256
72499a032c26ef7031b942590e4dd2e28d60b332620c7d2dc42bc4b70995e0dd

SHA512
9b0ea0bb6a4a6ae75c6463f2bc3b5bd012a40a89f491868979230b850b948240b40326c703211edd349911e97a218bf77d01d06f254c33d83939c21a152efae3

Download Submit
C:\Users\Admin\AppData\Roaming\Thanks For Using.txt

Filesize
57B

MD5
f9cfd0c4da0a9a068f8a26ee31c85036

SHA1
ea75b71cfdf7364eacfafcaac0421f9c80a2b4e5

SHA256
e52f33ee65ceb7e5fe9cd47744888c089c37ba7dbadeaf345e75b5cadd43ee2d

SHA512
f81823ed92d8f5aa299d0164f59fb77a3af4c6a9ca5a98e0d4b33104ec7f15ef19037d4bb4f3b2c8c1ca156bac2253f5052eb801468db73d71a67b10405e4b51

Download Submit
memory/736-40-0x0000000002870000-0x0000000002878000-memory.dmp

Filesize
32KB

Download
memory/2516-1-0x0000000001210000-0x000000000122A000-memory.dmp

Filesize
104KB

Download
memory/2516-0-0x000007FEF5C13000-0x000007FEF5C14000-memory.dmp

Filesize
4KB

Download
memory/2576-24-0x0000000002C00000-0x0000000002C08000-memory.dmp

Filesize
32KB

Download
memory/2576-23-0x000000001B4F0000-0x000000001B7D2000-memory.dmp

Filesize
2.9MB

Download
memory/2692-16-0x000000001B820000-0x000000001BB02000-memory.dmp

Filesize
2.9MB

Download
memory/2692-17-0x0000000001DD0000-0x0000000001DD8000-memory.dmp

Filesize
32KB

Download
memory/2948-8-0x0000000001060000-0x0000000001076000-memory.dmp

Filesize
88KB

Download
memory/2948-25-0x000007FEF5C10000-0x000007FEF65FC000-memory.dmp

Filesize
9.9MB

Download
memory/2948-11-0x000007FEF5C10000-0x000007FEF65FC000-memory.dmp

Filesize
9.9MB

Download
memory/2948-10-0x000007FEF5C10000-0x000007FEF65FC000-memory.dmp

Filesize
9.9MB

Download

Analysis

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