xworm | 27f53d6d1b4f4edb6c517ac1a517a4e9158d5d96eeccfd324c925d3772c3f44c

Analysis

max time kernel
141s
max time network
148s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
26/01/2025, 12:55

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General

Target

random.exe
Size

1.4MB
MD5

ebe8a0f61f53a3817c3fbcc3ab3a1f4c
SHA1

d87d66d53f29464d1f32b2c1e3b7ce507c51c40d
SHA256

27f53d6d1b4f4edb6c517ac1a517a4e9158d5d96eeccfd324c925d3772c3f44c
SHA512

33138b6fc03af9598821377dfdacaad64a56b7a05e7c7ae48de958e0002c8eec695e49633aec8be212be321f525ca165e40abf81bf0c69a57a0582f94698385b
SSDEEP

24576:HMjhUS5MaULo18LoNubLFwUoTh+tasCU1Yc0zRgYEz405bmktUNudtJjdPrF:6t5CLQ8sNg9oThYoic27cab7SNudXjdZ

Score

10^/10

xworm discovery execution rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

91.212.166.99:4404

Mutex

f35pmRFzPiiasEf1

Attributes

Install_directory
%LocalAppData%
install_file
dllhost.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/2748-72-0x0000000000330000-0x0000000000340000-memory.dmp	family_xworm

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

Executes dropped EXE 5 IoCs

pid	Process
2788	random.tmp
2896	random.tmp
2324	dllhost.exe
1192	Process not Found
1292	dllhost.exe

Loads dropped DLL 12 IoCs

pid	Process
2680	random.exe
2788	random.tmp
2788	random.tmp
2788	random.tmp
2736	random.exe
2896	random.tmp
2896	random.tmp
2896	random.tmp
1688	regsvr32.exe
2748	regsvr32.exe
2280	taskeng.exe
1192	Process not Found

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Run Powershell to execute payload.

execution

PowerShell

T1059.001

pid	Process
2616	powershell.exe
568	powershell.exe
568	powershell.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

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\%ProgramData%\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\Windows PowerShell.lnk	powershell.exe
File opened for modification	C:\Windows\System32\%ProgramData%\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\Windows PowerShell.lnk	powershell.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	random.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	random.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	random.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	random.tmp

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2992	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2748	regsvr32.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
2896	random.tmp
2896	random.tmp
2748	regsvr32.exe
2616	powershell.exe
568	powershell.exe
2748	regsvr32.exe
2748	regsvr32.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2616	powershell.exe
Token: SeDebugPrivilege	568	powershell.exe
Token: SeDebugPrivilege	2748	regsvr32.exe
Token: SeDebugPrivilege	2748	regsvr32.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2896	random.tmp

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2748	regsvr32.exe

Suspicious use of WriteProcessMemory 50 IoCs

description	pid	Process	procid_target
PID 2680 wrote to memory of 2788	2680	random.exe	30
PID 2680 wrote to memory of 2788	2680	random.exe	30
PID 2680 wrote to memory of 2788	2680	random.exe	30
PID 2680 wrote to memory of 2788	2680	random.exe	30
PID 2680 wrote to memory of 2788	2680	random.exe	30
PID 2680 wrote to memory of 2788	2680	random.exe	30
PID 2680 wrote to memory of 2788	2680	random.exe	30
PID 2788 wrote to memory of 2736	2788	random.tmp	31
PID 2788 wrote to memory of 2736	2788	random.tmp	31
PID 2788 wrote to memory of 2736	2788	random.tmp	31
PID 2788 wrote to memory of 2736	2788	random.tmp	31
PID 2788 wrote to memory of 2736	2788	random.tmp	31
PID 2788 wrote to memory of 2736	2788	random.tmp	31
PID 2788 wrote to memory of 2736	2788	random.tmp	31
PID 2736 wrote to memory of 2896	2736	random.exe	32
PID 2736 wrote to memory of 2896	2736	random.exe	32
PID 2736 wrote to memory of 2896	2736	random.exe	32
PID 2736 wrote to memory of 2896	2736	random.exe	32
PID 2736 wrote to memory of 2896	2736	random.exe	32
PID 2736 wrote to memory of 2896	2736	random.exe	32
PID 2736 wrote to memory of 2896	2736	random.exe	32
PID 2896 wrote to memory of 1688	2896	random.tmp	33
PID 2896 wrote to memory of 1688	2896	random.tmp	33
PID 2896 wrote to memory of 1688	2896	random.tmp	33
PID 2896 wrote to memory of 1688	2896	random.tmp	33
PID 2896 wrote to memory of 1688	2896	random.tmp	33
PID 2896 wrote to memory of 1688	2896	random.tmp	33
PID 2896 wrote to memory of 1688	2896	random.tmp	33
PID 1688 wrote to memory of 2748	1688	regsvr32.exe	34
PID 1688 wrote to memory of 2748	1688	regsvr32.exe	34
PID 1688 wrote to memory of 2748	1688	regsvr32.exe	34
PID 1688 wrote to memory of 2748	1688	regsvr32.exe	34
PID 1688 wrote to memory of 2748	1688	regsvr32.exe	34
PID 1688 wrote to memory of 2748	1688	regsvr32.exe	34
PID 1688 wrote to memory of 2748	1688	regsvr32.exe	34
PID 2748 wrote to memory of 2616	2748	regsvr32.exe	35
PID 2748 wrote to memory of 2616	2748	regsvr32.exe	35
PID 2748 wrote to memory of 2616	2748	regsvr32.exe	35
PID 2748 wrote to memory of 568	2748	regsvr32.exe	37
PID 2748 wrote to memory of 568	2748	regsvr32.exe	37
PID 2748 wrote to memory of 568	2748	regsvr32.exe	37
PID 2748 wrote to memory of 2992	2748	regsvr32.exe	40
PID 2748 wrote to memory of 2992	2748	regsvr32.exe	40
PID 2748 wrote to memory of 2992	2748	regsvr32.exe	40
PID 2280 wrote to memory of 2324	2280	taskeng.exe	44
PID 2280 wrote to memory of 2324	2280	taskeng.exe	44
PID 2280 wrote to memory of 2324	2280	taskeng.exe	44
PID 2280 wrote to memory of 1292	2280	taskeng.exe	45
PID 2280 wrote to memory of 1292	2280	taskeng.exe	45
PID 2280 wrote to memory of 1292	2280	taskeng.exe	45

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:\Users\Admin\AppData\Local\Temp\random.exe
"C:\Users\Admin\AppData\Local\Temp\random.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2680
- C:\Users\Admin\AppData\Local\Temp\is-CCN16.tmp\random.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-CCN16.tmp\random.tmp" /SL5="$400E8,1104885,161792,C:\Users\Admin\AppData\Local\Temp\random.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2788
- - C:\Users\Admin\AppData\Local\Temp\random.exe
    "C:\Users\Admin\AppData\Local\Temp\random.exe" /VERYSILENT
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2736
  - - C:\Users\Admin\AppData\Local\Temp\is-KO7PT.tmp\random.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-KO7PT.tmp\random.tmp" /SL5="$500E8,1104885,161792,C:\Users\Admin\AppData\Local\Temp\random.exe" /VERYSILENT
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of FindShellTrayWindow
      Suspicious use of WriteProcessMemory
      PID:2896
    - - C:\Windows\SysWOW64\regsvr32.exe
        
        "regsvr32.exe" /s /i:SYNC "C:\Users\Admin\AppData\Roaming\\uxtheme_2.drv"
        5⤵
        Loads dropped DLL
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:1688
      - C:\Windows\system32\regsvr32.exe
        
        /s /i:SYNC "C:\Users\Admin\AppData\Roaming\\uxtheme_2.drv"
        6⤵
        Loads dropped DLL
        Suspicious behavior: AddClipboardFormatListener
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:2748
        
        C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command "if (Get-ScheduledTask | Where-Object { $_.Actions.Execute -eq 'regsvr32' -and $_.Actions.Arguments -eq '/S /i:SYNC C:\Users\Admin\AppData\Roaming\uxtheme_2.drv' }) { exit 0 } else { exit 1 }"
        7⤵
        Command and Scripting Interpreter: PowerShell
        Drops file in System32 directory
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2616
        
        C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" "Register-ScheduledTask -Action (New-ScheduledTaskAction -Execute \"regsvr32\" -Argument \"/S /i:SYNC C:\Users\Admin\AppData\Roaming\uxtheme_2.drv\") -Trigger (New-ScheduledTaskTrigger -Once -At (Get-Date).AddMinutes(1) -RepetitionInterval (New-TimeSpan -Minutes 1)) -TaskName 'MicrosoftEdgeUpdateTaskMachineUA{4E2782E7-F911-42FD-92E1-CFA28DBCF717}' -Description 'MicrosoftEdgeUpdateTaskMachineUA' -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -DontStopIfGoingOnBatteries -ExecutionTimeLimit 0) -RunLevel Highest"
        7⤵
        Command and Scripting Interpreter: PowerShell
        Drops file in System32 directory
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:568
        
        C:\Windows\System32\schtasks.exe
        
        "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "dllhost" /tr "C:\Users\Admin\AppData\Local\dllhost.exe"
        7⤵
        Scheduled Task/Job: Scheduled Task
        
        PID:2992

C:\Windows\system32\taskeng.exe
taskeng.exe {D6D277FC-E1A6-423B-9B19-CB00AA398F17} S-1-5-21-3063565911-2056067323-3330884624-1000:KHBTHJFA\Admin:Interactive:[1]
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2280
- C:\Users\Admin\AppData\Local\dllhost.exe
  C:\Users\Admin\AppData\Local\dllhost.exe
  2⤵
  - Executes dropped EXE
  PID:2324
- C:\Users\Admin\AppData\Local\dllhost.exe
  C:\Users\Admin\AppData\Local\dllhost.exe
  2⤵
  - Executes dropped EXE
  PID:1292

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
7KB

MD5
ed4463ffb1a9db8342ced4d5ea03fe62

SHA1
00905caf430294e23b51f966e1ea59e9c6ed61ca

SHA256
3885aba4ac4a5bb3ce3acdb8a985da20cf9b9bf47c1863d63596c62a1bb1bdbe

SHA512
3f93b493f5ad1ad3d67e562049d66f9eed91fbc52caca1180cb07acde8642d84d2f6dfaa9d57559d85764fd2601dc738fb2d5b85087662f8605efb3d0b93cc6d

Download Submit
C:\Users\Admin\AppData\Roaming\uxtheme_2.drv

Filesize
3.0MB

MD5
022a2e01cd6ff624652952cf43b0fe0d

SHA1
f3670138ac48304d5ce26202ed51b20ada4f0052

SHA256
f4213387bf82edf9929ba45b8c4d6942e99b31b7b3d155f0b7d1d22bffe1d607

SHA512
c0ad1737197ce2216287a2d53251048a8cfca7ee67a54f3316b0d7be12728114e2b68e8b92b67eb5b6e3115164a02589c449f4432c1b9a7dc35c2f49d44e6155

Download Submit
\Users\Admin\AppData\Local\Temp\is-CCN16.tmp\random.tmp

Filesize
1.1MB

MD5
bcc236a3921e1388596a42b05686ff5e

SHA1
43bffbbac6a1bf5f1fa21e971e06e6f1d0af9263

SHA256
43a656bcd060e8a36502ca2deb878d56a99078f13d3e57dcd73a87128588c9e9

SHA512
e3baaf1a8f4eb0e1ab57a1fb35bc7ded476606b65fafb09835d34705d8c661819c3cfa0ecc43c5a0d0085fd570df581438de27944e054e12c09a6933bbf5ce04

Download Submit
\Users\Admin\AppData\Local\Temp\is-IHQ0N.tmp\_isetup\_isdecmp.dll

Filesize
13KB

MD5
a813d18268affd4763dde940246dc7e5

SHA1
c7366e1fd925c17cc6068001bd38eaef5b42852f

SHA256
e19781aabe466dd8779cb9c8fa41bbb73375447066bb34e876cf388a6ed63c64

SHA512
b310ed4cd2e94381c00a6a370fcb7cc867ebe425d705b69caaaaffdafbab91f72d357966916053e72e68ecf712f2af7585500c58bb53ec3e1d539179fcb45fb4

Download Submit
\Users\Admin\AppData\Local\Temp\is-IHQ0N.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\dllhost.exe

Filesize
19KB

MD5
59bce9f07985f8a4204f4d6554cff708

SHA1
645c424974fbe5fe7a04cac73f1c23c96e1570b8

SHA256
ca24aef558647274d019dfb4d7fd1506d84ec278795c30ba53b81bb36130dc57

SHA512
3cf5825a9c7fb80ea0bd36775a92d07f34cd3709ed2c7c8f500f1c8baa5242768f6d575bd2477b77e3f177e7a4994d5c5bddb24c6eb43b60a6bd83ea026a8198

Download Submit
memory/568-69-0x000000001B6C0000-0x000000001B9A2000-memory.dmp

Filesize
2.9MB

Download
memory/568-70-0x0000000001F10000-0x0000000001F18000-memory.dmp

Filesize
32KB

Download
memory/2616-61-0x000000001B6A0000-0x000000001B982000-memory.dmp

Filesize
2.9MB

Download
memory/2616-62-0x00000000027A0000-0x00000000027A8000-memory.dmp

Filesize
32KB

Download
memory/2680-0-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2680-2-0x0000000000401000-0x0000000000417000-memory.dmp

Filesize
88KB

Download
memory/2680-26-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2736-28-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2736-53-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2736-21-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2748-72-0x0000000000330000-0x0000000000340000-memory.dmp

Filesize
64KB

Download
memory/2748-73-0x000007FEF6730000-0x000007FEF6A30000-memory.dmp

Filesize
3.0MB

Download
memory/2788-15-0x0000000000400000-0x000000000052D000-memory.dmp

Filesize
1.2MB

Download
memory/2788-24-0x0000000000400000-0x000000000052D000-memory.dmp

Filesize
1.2MB

Download
memory/2896-51-0x0000000000400000-0x000000000052D000-memory.dmp

Filesize
1.2MB

Download