xworm | 11ea437ffb781fc9b93a6dfda275736ee591c14dfb860aa165a357974e90a352

General

Target

vson I temp.exe
Size

15.6MB
MD5

328e91dbd965eb1f0902080bc81df413
SHA1

7a049c89f8fd79f0b91e12bdff17affd2066e403
SHA256

11ea437ffb781fc9b93a6dfda275736ee591c14dfb860aa165a357974e90a352
SHA512

1e7e40e54db78ac7d78eccf98d6c34a6f70c29639c010c8512ffa56f06755bc445c161d990913ca2299ae3602f474b4aa0b34fd5fd728f9a473745aeacb4ce3e
SSDEEP

393216:nTvw6H8s1QzwNUJVtoMATyVchl49o1SrBqqxSlUa+PMsw6E3sSwr0DN:nJcJwCJEM7Vcf49LwUa+PDEsP0N

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

45.88.91.79:1111

Attributes

Install_directory
%AppData%
install_file
Update.exe

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/files/0x00070000000174b4-24.dat	family_xworm
behavioral1/memory/2676-27-0x00000000002D0000-0x00000000002EA000-memory.dmp	family_xworm
behavioral1/memory/876-44-0x0000000001100000-0x000000000111A000-memory.dmp	family_xworm

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

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Update.lnk	spoofer.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Update.lnk	spoofer.exe

Executes dropped EXE 5 IoCs

pid	Process
2764	svxspoofer.exe
2720	temp.exe
2676	spoofer.exe
876	Update.exe
2296	Update.exe

Loads dropped DLL 1 IoCs

pid	Process
2280	vson I temp.exe

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-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Windows\CurrentVersion\Run\Update = "C:\\Users\\Admin\\AppData\\Roaming\\Update.exe"	spoofer.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

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
2940	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1424	powershell.exe
2676	spoofer.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2676	spoofer.exe
Token: SeDebugPrivilege	1424	powershell.exe
Token: SeDebugPrivilege	2676	spoofer.exe
Token: SeDebugPrivilege	876	Update.exe
Token: SeDebugPrivilege	2296	Update.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2676	spoofer.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2280 wrote to memory of 2764	2280	vson I temp.exe	31
PID 2280 wrote to memory of 2764	2280	vson I temp.exe	31
PID 2280 wrote to memory of 2764	2280	vson I temp.exe	31
PID 2280 wrote to memory of 2720	2280	vson I temp.exe	32
PID 2280 wrote to memory of 2720	2280	vson I temp.exe	32
PID 2280 wrote to memory of 2720	2280	vson I temp.exe	32
PID 2764 wrote to memory of 532	2764	svxspoofer.exe	33
PID 2764 wrote to memory of 532	2764	svxspoofer.exe	33
PID 2764 wrote to memory of 532	2764	svxspoofer.exe	33
PID 2764 wrote to memory of 2676	2764	svxspoofer.exe	35
PID 2764 wrote to memory of 2676	2764	svxspoofer.exe	35
PID 2764 wrote to memory of 2676	2764	svxspoofer.exe	35
PID 532 wrote to memory of 1424	532	cmd.exe	36
PID 532 wrote to memory of 1424	532	cmd.exe	36
PID 532 wrote to memory of 1424	532	cmd.exe	36
PID 1424 wrote to memory of 2856	1424	powershell.exe	38
PID 1424 wrote to memory of 2856	1424	powershell.exe	38
PID 1424 wrote to memory of 2856	1424	powershell.exe	38
PID 2676 wrote to memory of 2940	2676	spoofer.exe	39
PID 2676 wrote to memory of 2940	2676	spoofer.exe	39
PID 2676 wrote to memory of 2940	2676	spoofer.exe	39
PID 2444 wrote to memory of 876	2444	taskeng.exe	42
PID 2444 wrote to memory of 876	2444	taskeng.exe	42
PID 2444 wrote to memory of 876	2444	taskeng.exe	42
PID 2444 wrote to memory of 2296	2444	taskeng.exe	43
PID 2444 wrote to memory of 2296	2444	taskeng.exe	43
PID 2444 wrote to memory of 2296	2444	taskeng.exe	43

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\vson I temp.exe
"C:\Users\Admin\AppData\Local\Temp\vson I temp.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2280
- C:\Users\Admin\AppData\Roaming\svxspoofer.exe
  "C:\Users\Admin\AppData\Roaming\svxspoofer.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:2764
- - C:\Windows\system32\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Roaming\Loli1.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:532
  - - 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:1424
    - - C:\Windows\system32\findstr.exe
        
        "C:\Windows\system32\findstr.exe" /i WDS100T2B0A
        5⤵
        
        PID:2856
- - C:\Users\Admin\AppData\Roaming\spoofer.exe
    "C:\Users\Admin\AppData\Roaming\spoofer.exe"
    3⤵
    - Drops startup file
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2676
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Update" /tr "C:\Users\Admin\AppData\Roaming\Update.exe"
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:2940
- C:\Users\Admin\AppData\Roaming\temp.exe
  "C:\Users\Admin\AppData\Roaming\temp.exe"
  2⤵
  - Executes dropped EXE
  PID:2720

C:\Windows\system32\taskeng.exe
taskeng.exe {237370B5-AFA8-4595-8A9F-4AA0C0BC7204} S-1-5-21-3063565911-2056067323-3330884624-1000:KHBTHJFA\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2444
- C:\Users\Admin\AppData\Roaming\Update.exe
  C:\Users\Admin\AppData\Roaming\Update.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:876
- C:\Users\Admin\AppData\Roaming\Update.exe
  C:\Users\Admin\AppData\Roaming\Update.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2296

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Loli1.bat

Filesize
7.9MB

MD5
fc0c7ac2031e2d8602581e1944d0ec03

SHA1
b326ca0ec216566a91563cf6d4eebe874a19c98a

SHA256
dd9f52ed7849f3c51b3945b0f80e21f3171dde9a42e2d9fb9167a40f1f303a82

SHA512
8992fe3cb717fc88994ff438dec8a843fc0765da9b0342da80adbf56099f95aa815fa134c8215477753a02de437db5242e3a10098caeefb3d26534103e4f5c49

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

Filesize
76KB

MD5
5f9520202e5e423920b9448aa0606202

SHA1
6731e2a1f86c1d1d3fa2f1a166ca5769f6448b75

SHA256
505e9abc61128bb34b33d1e9ad3f707822da952ea8bbd830292355e292e2953c

SHA512
c6413ae3b492ce874cfa30a320ce91368c8950bdc2e84d4b44d81e4246fd55d3f6ce9e069f42fd78f58dd401e90b79ba4c7bd6728d4d009a7ea3a610c23258a6

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

Filesize
8.0MB

MD5
25f5e0ff148fd515e321e303e85bb26d

SHA1
244e7d628183aa578a77fafe89f473f56b64a60e

SHA256
61b4a5fa314642743ee91fdd25ab762723216c165d7df5ffeec4e99708f76d6b

SHA512
037c7bc402ec364928664c71be7b7a5b8f3302fa069da3da141b24c7e14bac8adaa8cf5e8d287f571dc7d5509098ef262aec67076c5fbc39dbc5aecc7511976a

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

Filesize
7.6MB

MD5
c5c7253e68ea5d96ad86b7a99c465386

SHA1
1f6197326f53c231929f90b01d0afae65ae75c6d

SHA256
c38ce83359b11c63b187f1fe5d3c3a8ef2eac3377d67eada3299758f24d33cc5

SHA512
bf4221643f50ea2b9a3fd84e7c49219178f4e6d63b8f9e6505b512277534df945d7f0527d793981e37440abffdd78d93d04ac6a69532a64dea94a4e7e54355c9

Download Submit
memory/876-44-0x0000000001100000-0x000000000111A000-memory.dmp

Filesize
104KB

Download
memory/1424-33-0x000000001B830000-0x000000001BB12000-memory.dmp

Filesize
2.9MB

Download
memory/1424-34-0x0000000001DA0000-0x0000000001DA8000-memory.dmp

Filesize
32KB

Download
memory/2280-0-0x000007FEF5EE3000-0x000007FEF5EE4000-memory.dmp

Filesize
4KB

Download
memory/2280-1-0x0000000000950000-0x00000000018FA000-memory.dmp

Filesize
15.7MB

Download
memory/2676-27-0x00000000002D0000-0x00000000002EA000-memory.dmp

Filesize
104KB

Download
memory/2764-8-0x0000000001180000-0x000000000198E000-memory.dmp

Filesize
8.1MB

Download
memory/2764-28-0x000007FEF5EE0000-0x000007FEF68CC000-memory.dmp

Filesize
9.9MB

Download
memory/2764-40-0x000007FEF5EE0000-0x000007FEF68CC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads