xworm | b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb

General

Target

b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe
Size

75KB
MD5

a9fa87983b51d76f3a50af06c2cbb35b
SHA1

873cb3af6ebe410e2d3ff40ba7621be164503b1c
SHA256

b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb
SHA512

0db860c331f0b3c88f1cb64171bc464f28710be98dd1fa44ce61a44aa98f8ee82662010d9c3f8384d69868796152c2fe33c913ae1778df242248c230a58d7ae4
SSDEEP

1536:sYJn3x8bqIyJFjVKBjjbbrrbCSr1EQv6q3J6xZOyxfgMoJ:DnKHUFjgBjHHrbCw56HZOmLoJ

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:2523

match-remedies.gl.at.ply.gg:2523

Attributes

Install_directory
%AppData%
install_file
conhost.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/3656-1-0x00000000004D0000-0x00000000004EA000-memory.dmp	family_xworm
behavioral2/files/0x000a000000023c8f-61.dat	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 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
1476	powershell.exe
1728	powershell.exe
2396	powershell.exe
5012	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-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\conhost.lnk	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\conhost.lnk	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe

Executes dropped EXE 2 IoCs

pid	Process
1064	conhost.exe
4292	conhost.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-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\conhost = "C:\\Users\\Admin\\AppData\\Roaming\\conhost.exe"	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.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
15	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
1472	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1476	powershell.exe
1476	powershell.exe
1728	powershell.exe
1728	powershell.exe
2396	powershell.exe
2396	powershell.exe
5012	powershell.exe
5012	powershell.exe
3656	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	3656	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe
Token: SeDebugPrivilege	1476	powershell.exe
Token: SeDebugPrivilege	1728	powershell.exe
Token: SeDebugPrivilege	2396	powershell.exe
Token: SeDebugPrivilege	5012	powershell.exe
Token: SeDebugPrivilege	3656	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe
Token: SeDebugPrivilege	1064	conhost.exe
Token: SeDebugPrivilege	4292	conhost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3656	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3656 wrote to memory of 1476	3656	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe	88
PID 3656 wrote to memory of 1476	3656	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe	88
PID 3656 wrote to memory of 1728	3656	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe	90
PID 3656 wrote to memory of 1728	3656	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe	90
PID 3656 wrote to memory of 2396	3656	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe	92
PID 3656 wrote to memory of 2396	3656	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe	92
PID 3656 wrote to memory of 5012	3656	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe	94
PID 3656 wrote to memory of 5012	3656	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe	94
PID 3656 wrote to memory of 1472	3656	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe	101
PID 3656 wrote to memory of 1472	3656	b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe	101

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\b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe
"C:\Users\Admin\AppData\Local\Temp\b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3656
- 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\b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1476
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1728
- 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\Roaming\conhost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2396
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'conhost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5012
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "conhost" /tr "C:\Users\Admin\AppData\Roaming\conhost.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1472

C:\Users\Admin\AppData\Roaming\conhost.exe
C:\Users\Admin\AppData\Roaming\conhost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1064

C:\Users\Admin\AppData\Roaming\conhost.exe
C:\Users\Admin\AppData\Roaming\conhost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4292

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

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

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
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
6c47b3f4e68eebd47e9332eebfd2dd4e

SHA1
67f0b143336d7db7b281ed3de5e877fa87261834

SHA256
8c48b1f2338e5b24094821f41121d2221f1cb3200338f46df49f64d1c4bc3e0c

SHA512
0acf302a9fc971ef9df65ed42c47ea17828e54dff685f4434f360556fd27cdc26a75069f00dcdc14ba174893c6fd7a2cfd8c6c07be3ce35dafee0a006914eaca

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

Filesize
944B

MD5
eb1ad317bd25b55b2bbdce8a28a74a94

SHA1
98a3978be4d10d62e7411946474579ee5bdc5ea6

SHA256
9e94e7c9ac6134ee30e79498558aa1a5a1ac79a643666c3f8922eed215dd3a98

SHA512
d011f266c0240d84470c0f9577cd9e4927309bd19bb38570ca9704ed8e1d159f9bea982a59d3eefef72ce7a10bd81208b82e88ef57c7af587f7437a89769adc0

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

Filesize
944B

MD5
98baf5117c4fcec1692067d200c58ab3

SHA1
5b33a57b72141e7508b615e17fb621612cb8e390

SHA256
30bf8496e9a08f4fdfe4767abcd565f92b6da06ca1c7823a70cb7cab16262e51

SHA512
344a70bfc037d54176f12db91f05bf4295bb587a5062fd1febe6f52853571170bd8ef6042cb87b893185bbae1937cf77b679d7970f8cc1c2666b0b7c1b32987d

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_op4uy2ln.hkz.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
75KB

MD5
a9fa87983b51d76f3a50af06c2cbb35b

SHA1
873cb3af6ebe410e2d3ff40ba7621be164503b1c

SHA256
b17bb04b7f0506154e74507b1adeb782923dcf773ce2e2b451b1bf1ae32f02cb

SHA512
0db860c331f0b3c88f1cb64171bc464f28710be98dd1fa44ce61a44aa98f8ee82662010d9c3f8384d69868796152c2fe33c913ae1778df242248c230a58d7ae4

Download Submit
memory/1476-8-0x00007FF9DC8D0000-0x00007FF9DD391000-memory.dmp

Filesize
10.8MB

Download
memory/1476-18-0x00007FF9DC8D0000-0x00007FF9DD391000-memory.dmp

Filesize
10.8MB

Download
memory/1476-13-0x00000281D3C90000-0x00000281D3CB2000-memory.dmp

Filesize
136KB

Download
memory/1476-14-0x00007FF9DC8D0000-0x00007FF9DD391000-memory.dmp

Filesize
10.8MB

Download
memory/1476-15-0x00007FF9DC8D0000-0x00007FF9DD391000-memory.dmp

Filesize
10.8MB

Download
memory/1728-31-0x000001EAF6040000-0x000001EAF625C000-memory.dmp

Filesize
2.1MB

Download
memory/3656-0-0x00007FF9DC8D3000-0x00007FF9DC8D5000-memory.dmp

Filesize
8KB

Download
memory/3656-43-0x00007FF9DC8D3000-0x00007FF9DC8D5000-memory.dmp

Filesize
8KB

Download
memory/3656-2-0x00007FF9DC8D0000-0x00007FF9DD391000-memory.dmp

Filesize
10.8MB

Download
memory/3656-60-0x00007FF9DC8D0000-0x00007FF9DD391000-memory.dmp

Filesize
10.8MB

Download
memory/3656-1-0x00000000004D0000-0x00000000004EA000-memory.dmp

Filesize
104KB

Download
memory/5012-55-0x0000021171400000-0x000002117161C000-memory.dmp

Filesize
2.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads