xworm | 78644ac0e1fd8d30748e8980d15a0db7dfcd783e5b7b6f72b71d707d1799e1d9

General

Target

Dek Store.exe
Size

4.0MB
MD5

0e24307ddf87b25a3ca7c5301a393633
SHA1

ec28111e105e95f3835f797d7b88b9ffa3f77683
SHA256

78644ac0e1fd8d30748e8980d15a0db7dfcd783e5b7b6f72b71d707d1799e1d9
SHA512

ae032bc7b20914d52deda07fbc50b593605863ebfb92a62c79cb6ea1efc92c14bb42f8abffc69404aca1f0b6dbf4579ab23d0e36189d371929faa7082be2e52b
SSDEEP

98304:pUZUZBlLQ8OLqmRdmgcmqPkGAnSG6qn4HoLVvrW1f:pjHQ8H0mgcRkGpG6wlr8

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

185.84.160.238:7000

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x001c00000002aa50-14.dat	family_xworm
behavioral1/memory/4728-22-0x0000000000D80000-0x0000000000D98000-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
3028	powershell.exe
4140	powershell.exe
3424	powershell.exe
3016	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
1896	Dek Store.exe
4728	XClient.exe
4268	XClient.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-1-5-21-3587106988-279496464-3440778474-1000\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
1	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
1228	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4140	powershell.exe
4140	powershell.exe
3424	powershell.exe
3424	powershell.exe
3016	powershell.exe
3016	powershell.exe
3028	powershell.exe
3028	powershell.exe
4728	XClient.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	4728	XClient.exe
Token: SeDebugPrivilege	4140	powershell.exe
Token: SeDebugPrivilege	3424	powershell.exe
Token: SeDebugPrivilege	3016	powershell.exe
Token: SeDebugPrivilege	3028	powershell.exe
Token: SeDebugPrivilege	4728	XClient.exe
Token: SeDebugPrivilege	4268	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4728	XClient.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1920 wrote to memory of 1896	1920	Dek Store.exe	77
PID 1920 wrote to memory of 1896	1920	Dek Store.exe	77
PID 1920 wrote to memory of 4728	1920	Dek Store.exe	78
PID 1920 wrote to memory of 4728	1920	Dek Store.exe	78
PID 4728 wrote to memory of 4140	4728	XClient.exe	80
PID 4728 wrote to memory of 4140	4728	XClient.exe	80
PID 4728 wrote to memory of 3424	4728	XClient.exe	82
PID 4728 wrote to memory of 3424	4728	XClient.exe	82
PID 4728 wrote to memory of 3016	4728	XClient.exe	84
PID 4728 wrote to memory of 3016	4728	XClient.exe	84
PID 4728 wrote to memory of 3028	4728	XClient.exe	86
PID 4728 wrote to memory of 3028	4728	XClient.exe	86
PID 4728 wrote to memory of 1228	4728	XClient.exe	88
PID 4728 wrote to memory of 1228	4728	XClient.exe	88

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\Dek Store.exe
"C:\Users\Admin\AppData\Local\Temp\Dek Store.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1920
- C:\Users\Admin\AppData\Roaming\Dek Store.exe
  "C:\Users\Admin\AppData\Roaming\Dek Store.exe"
  2⤵
  - Executes dropped EXE
  PID:1896
- C:\Users\Admin\AppData\Roaming\XClient.exe
  "C:\Users\Admin\AppData\Roaming\XClient.exe"
  2⤵
  - 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:4728
- - 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:4140
- - 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:3424
- - 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:3016
- - 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:3028
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1228

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4268

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

1

T1012

System Information Discovery

1

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
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

Filesize
944B

MD5
05b3cd21c1ec02f04caba773186ee8d0

SHA1
39e790bfe10abf55b74dfb3603df8fcf6b5e6edb

SHA256
911efc5cf9cbeb697543eb3242f5297e1be46dd6603a390140a9ff031ed9e1e8

SHA512
e751008b032394817beb46937fd93a73be97254c2be94dd42f22fb1306d2715c653ece16fa96eab1a3e73811936768cea6b37888437086fc6f3e3e793a2515eb

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

Filesize
944B

MD5
6f0e62045515b66d0a0105abc22dbf19

SHA1
894d685122f3f3c9a3457df2f0b12b0e851b394c

SHA256
529811e4d3496c559f3bd92cd877b93b719c3ac4834202aa76ab9e16e25f9319

SHA512
f78426df6032ee77f8c463446ab1c6bb4669ef7a2463dead831ec4ff83a07d7dc702d79372d8bcaf4594bf0fb6e11e9f027f3e0325de9b19be5f51b7b80ed54a

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

Filesize
944B

MD5
2e0391d00f5bfbc34be70790f14d5edf

SHA1
fcb04d8599c23967de4f154a101be480933ab0d0

SHA256
1c0c0c86d7c736fc9fb148ac7cd6e67565dc5b76fa116ae3b000a79e91855136

SHA512
231b9cc6efb928f0748cef04f287d9204c4f7d2eb4bc27f345e9a1afc6d0675057978ca44d1a95334ee2380709aa6dbe74015fedff8f17611a64efcfb9f64d2a

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_n13vcmhp.zs5.psm1

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
73KB

MD5
3d573feda95c5c6a254f61034e53f4ea

SHA1
4177fff9b6ef7fae2481f21cac340e4e9cf60c61

SHA256
6fd492c927c9c204f24a0948170bb70a5720c19e355ba79213ee60e45b535382

SHA512
6831d0581ce5af676269d1549d2ccf4947e3357c20b3d1452d0817b6b57ffa4fb9305704b03e38bfdfebc089489fc3e24388b29d9c73ec30cf11bd0c796e1bd3

Download Submit
memory/1920-0-0x00007FFE1C583000-0x00007FFE1C585000-memory.dmp

Filesize
8KB

Download
memory/1920-1-0x0000000000FB0000-0x00000000013AC000-memory.dmp

Filesize
4.0MB

Download
memory/4140-32-0x000002C2A6520000-0x000002C2A6542000-memory.dmp

Filesize
136KB

Download
memory/4728-23-0x00007FFE1C580000-0x00007FFE1D042000-memory.dmp

Filesize
10.8MB

Download
memory/4728-22-0x0000000000D80000-0x0000000000D98000-memory.dmp

Filesize
96KB

Download
memory/4728-67-0x00007FFE1C580000-0x00007FFE1D042000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads