xworm | 04fd0e391c1177b2bf2ef415b7f7470809806cabb25dcd80981feb4a309da2d4

General

Target

Dettex.exe
Size

74KB
MD5

30da326c4c36491b7b602498140a134f
SHA1

f3ec1e8c2219b32bcb2427b54081fce8a0d3ab09
SHA256

04fd0e391c1177b2bf2ef415b7f7470809806cabb25dcd80981feb4a309da2d4
SHA512

9ea404472927c61d31e6941fb36964fe5d5d607ec56655feada98b3d21f00ea4ff6f6dd4cfe42ef8e51b6ff5ed72c7f68778a9e2b885f7437305cd6efa581947
SSDEEP

1536:l1LcsmaO35Ab5gMhqsoUB6WOne86ChRaA5am:ncOb5zdOneFCRN5am

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:50023

custom-authentication.gl.at.ply:50023

Attributes

Install_directory
%AppData%
install_file
Dettex.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/1916-1-0x0000000000870000-0x0000000000888000-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 4 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2628	powershell.exe
964	powershell.exe
1412	powershell.exe
1264	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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	Dettex.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Dettex.lnk	Dettex.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Dettex.lnk	Dettex.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-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Dettex = "C:\\Users\\Admin\\AppData\\Roaming\\Dettex.exe"	Dettex.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

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2628	powershell.exe
2628	powershell.exe
964	powershell.exe
964	powershell.exe
1412	powershell.exe
1412	powershell.exe
1264	powershell.exe
1264	powershell.exe
1916	Dettex.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	1916	Dettex.exe
Token: SeDebugPrivilege	2628	powershell.exe
Token: SeDebugPrivilege	964	powershell.exe
Token: SeDebugPrivilege	1412	powershell.exe
Token: SeDebugPrivilege	1264	powershell.exe
Token: SeDebugPrivilege	1916	Dettex.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1916	Dettex.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1916 wrote to memory of 2628	1916	Dettex.exe	83
PID 1916 wrote to memory of 2628	1916	Dettex.exe	83
PID 1916 wrote to memory of 964	1916	Dettex.exe	85
PID 1916 wrote to memory of 964	1916	Dettex.exe	85
PID 1916 wrote to memory of 1412	1916	Dettex.exe	87
PID 1916 wrote to memory of 1412	1916	Dettex.exe	87
PID 1916 wrote to memory of 1264	1916	Dettex.exe	89
PID 1916 wrote to memory of 1264	1916	Dettex.exe	89

C:\Users\Admin\AppData\Local\Temp\Dettex.exe
"C:\Users\Admin\AppData\Local\Temp\Dettex.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:1916
- 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\Dettex.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2628
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Dettex.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:964
- 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\Dettex.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1412
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Dettex.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1264

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

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\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
d28a889fd956d5cb3accfbaf1143eb6f

SHA1
157ba54b365341f8ff06707d996b3635da8446f7

SHA256
21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

SHA512
0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

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

Filesize
944B

MD5
22310ad6749d8cc38284aa616efcd100

SHA1
440ef4a0a53bfa7c83fe84326a1dff4326dcb515

SHA256
55b1d8021c4eb4c3c0d75e3ed7a4eb30cd0123e3d69f32eeb596fe4ffec05abf

SHA512
2ef08e2ee15bb86695fe0c10533014ffed76ececc6e579d299d3365fafb7627f53e32e600bb6d872b9f58aca94f8cb7e1e94cdfd14777527f7f0aa019d9c6def

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

Filesize
944B

MD5
04f1d68afbed6b13399edfae1e9b1472

SHA1
8bfdcb687a995e4a63a8c32df2c66dc89f91a8b0

SHA256
f358f33a42122e97c489fad7bbc8beab2eb42d42e4ec7fce0dd61fe6d8c0b8de

SHA512
30c5e72a8134992094d937d2588f7a503b1d6407d11afe0265b7c8b0ce14071925e5caed13fc4f9c28705df4c7aed3601f81b007048b148af274d7784aa5fb75

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ihpsc1ep.5la.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1916-1-0x0000000000870000-0x0000000000888000-memory.dmp

Filesize
96KB

Download
memory/1916-2-0x00007FFDBCE00000-0x00007FFDBD8C1000-memory.dmp

Filesize
10.8MB

Download
memory/1916-0-0x00007FFDBCE03000-0x00007FFDBCE05000-memory.dmp

Filesize
8KB

Download
memory/1916-58-0x00007FFDBCE00000-0x00007FFDBD8C1000-memory.dmp

Filesize
10.8MB

Download
memory/1916-57-0x00007FFDBCE03000-0x00007FFDBCE05000-memory.dmp

Filesize
8KB

Download
memory/2628-4-0x00007FFDBCE00000-0x00007FFDBD8C1000-memory.dmp

Filesize
10.8MB

Download
memory/2628-18-0x00007FFDBCE00000-0x00007FFDBD8C1000-memory.dmp

Filesize
10.8MB

Download
memory/2628-6-0x00007FFDBCE00000-0x00007FFDBD8C1000-memory.dmp

Filesize
10.8MB

Download
memory/2628-5-0x00007FFDBCE00000-0x00007FFDBD8C1000-memory.dmp

Filesize
10.8MB

Download
memory/2628-3-0x000001B83F130000-0x000001B83F152000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads