xworm | 4ea0f4177212cf9914dc618b5be8ba2fb321bce0842d16cf5f36ee61836488fe

Analysis

max time kernel
30s
max time network
31s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
19/11/2024, 12:20

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General

Target

Fulloption By. Dex.exe
Size

4.0MB
MD5

5b34c8c913bffd982ce703edcb56fae3
SHA1

3b58515c2839fef05968a0e1ecec7d4512807648
SHA256

4ea0f4177212cf9914dc618b5be8ba2fb321bce0842d16cf5f36ee61836488fe
SHA512

0c1566a42026d7cca066264b2c6f317b5151c1908000a8126cb0934c9f2985f77ec2d4d21de6c94c4138c03b8a90ac8aff3c70ea7e4d4e23f54f9cda293b0848
SSDEEP

98304:SpnuyBv8VH8hzMDJf9+smoYrMvdwTj2ps7:UnuEv0Ib5ydwTSW7

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

185.84.160.151:7000

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x0029000000045043-6.dat	family_xworm
behavioral1/memory/4760-17-0x0000000000D00000-0x0000000000D18000-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
4156	powershell.exe
2332	powershell.exe
4452	powershell.exe
1160	powershell.exe

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-1-5-21-641261377-2215826147-608237349-1000\Control Panel\International\Geo\Nation	Fulloption By. Dex.exe
Key value queried	\REGISTRY\USER\S-1-5-21-641261377-2215826147-608237349-1000\Control Panel\International\Geo\Nation	XClient.exe

Executes dropped EXE 2 IoCs

pid	Process
4760	XClient.exe
1584	Dek Store.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-1-5-21-641261377-2215826147-608237349-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	XClient.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
4156	powershell.exe
4156	powershell.exe
2332	powershell.exe
2332	powershell.exe
4452	powershell.exe
4452	powershell.exe
1160	powershell.exe
1160	powershell.exe
4760	XClient.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4760	XClient.exe
Token: SeDebugPrivilege	4156	powershell.exe
Token: SeIncreaseQuotaPrivilege	4156	powershell.exe
Token: SeSecurityPrivilege	4156	powershell.exe
Token: SeTakeOwnershipPrivilege	4156	powershell.exe
Token: SeLoadDriverPrivilege	4156	powershell.exe
Token: SeSystemProfilePrivilege	4156	powershell.exe
Token: SeSystemtimePrivilege	4156	powershell.exe
Token: SeProfSingleProcessPrivilege	4156	powershell.exe
Token: SeIncBasePriorityPrivilege	4156	powershell.exe
Token: SeCreatePagefilePrivilege	4156	powershell.exe
Token: SeBackupPrivilege	4156	powershell.exe
Token: SeRestorePrivilege	4156	powershell.exe
Token: SeShutdownPrivilege	4156	powershell.exe
Token: SeDebugPrivilege	4156	powershell.exe
Token: SeSystemEnvironmentPrivilege	4156	powershell.exe
Token: SeRemoteShutdownPrivilege	4156	powershell.exe
Token: SeUndockPrivilege	4156	powershell.exe
Token: SeManageVolumePrivilege	4156	powershell.exe
Token: 33	4156	powershell.exe
Token: 34	4156	powershell.exe
Token: 35	4156	powershell.exe
Token: 36	4156	powershell.exe
Token: SeDebugPrivilege	2332	powershell.exe
Token: SeIncreaseQuotaPrivilege	2332	powershell.exe
Token: SeSecurityPrivilege	2332	powershell.exe
Token: SeTakeOwnershipPrivilege	2332	powershell.exe
Token: SeLoadDriverPrivilege	2332	powershell.exe
Token: SeSystemProfilePrivilege	2332	powershell.exe
Token: SeSystemtimePrivilege	2332	powershell.exe
Token: SeProfSingleProcessPrivilege	2332	powershell.exe
Token: SeIncBasePriorityPrivilege	2332	powershell.exe
Token: SeCreatePagefilePrivilege	2332	powershell.exe
Token: SeBackupPrivilege	2332	powershell.exe
Token: SeRestorePrivilege	2332	powershell.exe
Token: SeShutdownPrivilege	2332	powershell.exe
Token: SeDebugPrivilege	2332	powershell.exe
Token: SeSystemEnvironmentPrivilege	2332	powershell.exe
Token: SeRemoteShutdownPrivilege	2332	powershell.exe
Token: SeUndockPrivilege	2332	powershell.exe
Token: SeManageVolumePrivilege	2332	powershell.exe
Token: 33	2332	powershell.exe
Token: 34	2332	powershell.exe
Token: 35	2332	powershell.exe
Token: 36	2332	powershell.exe
Token: SeDebugPrivilege	4452	powershell.exe
Token: SeIncreaseQuotaPrivilege	4452	powershell.exe
Token: SeSecurityPrivilege	4452	powershell.exe
Token: SeTakeOwnershipPrivilege	4452	powershell.exe
Token: SeLoadDriverPrivilege	4452	powershell.exe
Token: SeSystemProfilePrivilege	4452	powershell.exe
Token: SeSystemtimePrivilege	4452	powershell.exe
Token: SeProfSingleProcessPrivilege	4452	powershell.exe
Token: SeIncBasePriorityPrivilege	4452	powershell.exe
Token: SeCreatePagefilePrivilege	4452	powershell.exe
Token: SeBackupPrivilege	4452	powershell.exe
Token: SeRestorePrivilege	4452	powershell.exe
Token: SeShutdownPrivilege	4452	powershell.exe
Token: SeDebugPrivilege	4452	powershell.exe
Token: SeSystemEnvironmentPrivilege	4452	powershell.exe
Token: SeRemoteShutdownPrivilege	4452	powershell.exe
Token: SeUndockPrivilege	4452	powershell.exe
Token: SeManageVolumePrivilege	4452	powershell.exe
Token: 33	4452	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4760	XClient.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4352 wrote to memory of 4760	4352	Fulloption By. Dex.exe	82
PID 4352 wrote to memory of 4760	4352	Fulloption By. Dex.exe	82
PID 4352 wrote to memory of 1584	4352	Fulloption By. Dex.exe	83
PID 4352 wrote to memory of 1584	4352	Fulloption By. Dex.exe	83
PID 4760 wrote to memory of 4156	4760	XClient.exe	88
PID 4760 wrote to memory of 4156	4760	XClient.exe	88
PID 4760 wrote to memory of 2332	4760	XClient.exe	91
PID 4760 wrote to memory of 2332	4760	XClient.exe	91
PID 4760 wrote to memory of 4452	4760	XClient.exe	93
PID 4760 wrote to memory of 4452	4760	XClient.exe	93
PID 4760 wrote to memory of 1160	4760	XClient.exe	96
PID 4760 wrote to memory of 1160	4760	XClient.exe	96

C:\Users\Admin\AppData\Local\Temp\Fulloption By. Dex.exe
"C:\Users\Admin\AppData\Local\Temp\Fulloption By. Dex.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4352
- C:\Users\Admin\AppData\Roaming\XClient.exe
  "C:\Users\Admin\AppData\Roaming\XClient.exe"
  2⤵
  - Checks computer location settings
  - 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:4760
- - 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\XClient.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4156
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2332
- - 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\XClient.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4452
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    PID:1160
- C:\Users\Admin\AppData\Roaming\Dek Store.exe
  "C:\Users\Admin\AppData\Roaming\Dek Store.exe"
  2⤵
  - Executes dropped EXE
  PID:1584

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

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

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

Filesize
3KB

MD5
3eb3833f769dd890afc295b977eab4b4

SHA1
e857649b037939602c72ad003e5d3698695f436f

SHA256
c485a6e2fd17c342fca60060f47d6a5655a65a412e35e001bb5bf88d96e6e485

SHA512
c24bbc8f278478d43756807b8c584d4e3fb2289db468bc92986a489f74a8da386a667a758360a397e77e018e363be8912ac260072fa3e31117ad0599ac749e72

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

Filesize
1KB

MD5
af1cc13f412ef37a00e668df293b1584

SHA1
8973b3e622f187fcf484a0eb9fa692bf3e2103cb

SHA256
449c0c61734cf23f28ad05a7e528f55dd8a7c6ae7a723253707e5f73de187037

SHA512
75d954ec8b98f804d068635875fac06e9594874f0f5d6e2ad9d6267285d1d4a1de6309009de9e2956c6477a888db648396f77a1a49b58287d2683b8214e7a3d3

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

Filesize
1KB

MD5
0884843378e6e2c4560544ad4864c804

SHA1
f008c7eeba2c19ddf01422ffcb4ed38a6bcbf8b1

SHA256
01b005c3b5d6eb910d3afe7fb5f2f9f654fe6b72434f09fad9b641fa2d33ee9d

SHA512
252993a27cf6fd87f91781f50de5c34a4a263e8a734e795372cf76b0c2553be1098fae04b7f0e5f54980a7ba7fcfa1fb6e109b33383ebb1a7c174040996e2c64

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

Filesize
1KB

MD5
66ad1be26a4c908c4b964068167d4340

SHA1
26b1e29ce5345671d93aff106e55938a6caa62ba

SHA256
486bebf69c491fc6a20eb731c578061d02067b4799aa0a526ef92ef3c8a5aa2a

SHA512
4ffaa09bbae88aa77013aebae51d714d578f6463d9b7bf5782123f46af716c6556e618250dfdd82a5f8a4a84fd95f5ef87346f8abb5b5886f297906efd812900

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_pn0ga1bw.or2.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\Dek Store.exe

Filesize
3.9MB

MD5
2f6e9c0dd1c6859a9d6e7acea1db9ac0

SHA1
b0dcd2be62b6a559e479de7745ab0988b8b30522

SHA256
122e3cb0f2ad233d1a364911d433667e7778f00d9a7d10b954c994f4e8093d1f

SHA512
fe3634f46afd5b45f0ffc721a18b5ef1b1344b548f90b8c54ea6995e3d64b7394b56c681b1a0522b67e862fce9d8333b621612a2f03708e7dbc917a28c58c15d

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

Filesize
69KB

MD5
27286be594276ca44beb10baacad0f20

SHA1
d084c78a089b1f630d4d1f6a38221bcdefea1705

SHA256
a6032964483653bcbe86e678e4171b948d12cb13bcec113e5857d7526cbc6299

SHA512
78ac09b81c1a6b44bd904727ec303abf90a6d1419ec3c9730d2ea16a1383c8ed3ffc631db2ee43fdab626164ee3a0a4b5830323cb4918bd1ac7aa7b9ae013942

Download Submit
memory/1160-79-0x000002255BD80000-0x000002255BF9D000-memory.dmp

Filesize
2.1MB

Download
memory/2332-55-0x0000013F8E6D0000-0x0000013F8E71C000-memory.dmp

Filesize
304KB

Download
memory/2332-56-0x0000013FA6B40000-0x0000013FA6D5D000-memory.dmp

Filesize
2.1MB

Download
memory/4156-32-0x00000236FF120000-0x00000236FF142000-memory.dmp

Filesize
136KB

Download
memory/4352-0-0x00007FFCDB973000-0x00007FFCDB975000-memory.dmp

Filesize
8KB

Download
memory/4352-1-0x0000000000780000-0x0000000000B7C000-memory.dmp

Filesize
4.0MB

Download
memory/4760-30-0x00007FFCDB970000-0x00007FFCDC432000-memory.dmp

Filesize
10.8MB

Download
memory/4760-29-0x00007FFCDB970000-0x00007FFCDC432000-memory.dmp

Filesize
10.8MB

Download
memory/4760-17-0x0000000000D00000-0x0000000000D18000-memory.dmp

Filesize
96KB

Download
memory/4760-80-0x00007FFCDB970000-0x00007FFCDC432000-memory.dmp

Filesize
10.8MB

Download
memory/4760-81-0x00007FFCDB970000-0x00007FFCDC432000-memory.dmp

Filesize
10.8MB

Download