xworm | 7b24d9dc380ea21160d1e5f753b4992cdc1c8ebf8071cf87f31ec7a7be55c035

General

Target

RobloxFlingV4.exe
Size

77KB
MD5

a3d8c1ce63a239eda1c0958acd5f106f
SHA1

d9b5899773d4250cfa80605bb3524a01aad462b8
SHA256

7b24d9dc380ea21160d1e5f753b4992cdc1c8ebf8071cf87f31ec7a7be55c035
SHA512

cddeaab7f3441aeaf19cdd5cd9560f42b8e6e95752584b7faa868728fb442becfb069eaade6d69c64eefcd20922f6800c136cebdd2d896fa1add896325c908ef
SSDEEP

1536:entZ0f9nRQFt8jo2r6+RRoXPGLyTsrG96HIU+bml4cfP61Ak8OvdUCUVB:669nRQFt8jNs/vTf+IU+bmo18OF1OB

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

success-olympus.gl.at.ply.gg:36156

Attributes

Install_directory
%AppData%
install_file
USB.exe

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/memory/2904-1-0x0000000000080000-0x000000000009A000-memory.dmp	family_xworm
behavioral1/files/0x000f000000012263-33.dat	family_xworm
behavioral1/memory/1972-35-0x0000000000D50000-0x0000000000D6A000-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
2820	powershell.exe
2964	powershell.exe
2956	powershell.exe
2228	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	RobloxFlingV4.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	RobloxFlingV4.exe

Executes dropped EXE 2 IoCs

pid	Process
1972	svchost
988	svchost

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-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Roaming\\svchost"	RobloxFlingV4.exe

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
2200	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2820	powershell.exe
2964	powershell.exe
2956	powershell.exe
2228	powershell.exe
2904	RobloxFlingV4.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2904	RobloxFlingV4.exe
Token: SeDebugPrivilege	2820	powershell.exe
Token: SeDebugPrivilege	2964	powershell.exe
Token: SeDebugPrivilege	2956	powershell.exe
Token: SeDebugPrivilege	2228	powershell.exe
Token: SeDebugPrivilege	2904	RobloxFlingV4.exe
Token: SeDebugPrivilege	1972	svchost
Token: SeDebugPrivilege	988	svchost

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2904	RobloxFlingV4.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2904 wrote to memory of 2820	2904	RobloxFlingV4.exe	30
PID 2904 wrote to memory of 2820	2904	RobloxFlingV4.exe	30
PID 2904 wrote to memory of 2820	2904	RobloxFlingV4.exe	30
PID 2904 wrote to memory of 2964	2904	RobloxFlingV4.exe	32
PID 2904 wrote to memory of 2964	2904	RobloxFlingV4.exe	32
PID 2904 wrote to memory of 2964	2904	RobloxFlingV4.exe	32
PID 2904 wrote to memory of 2956	2904	RobloxFlingV4.exe	34
PID 2904 wrote to memory of 2956	2904	RobloxFlingV4.exe	34
PID 2904 wrote to memory of 2956	2904	RobloxFlingV4.exe	34
PID 2904 wrote to memory of 2228	2904	RobloxFlingV4.exe	36
PID 2904 wrote to memory of 2228	2904	RobloxFlingV4.exe	36
PID 2904 wrote to memory of 2228	2904	RobloxFlingV4.exe	36
PID 2904 wrote to memory of 2200	2904	RobloxFlingV4.exe	38
PID 2904 wrote to memory of 2200	2904	RobloxFlingV4.exe	38
PID 2904 wrote to memory of 2200	2904	RobloxFlingV4.exe	38
PID 1688 wrote to memory of 1972	1688	taskeng.exe	41
PID 1688 wrote to memory of 1972	1688	taskeng.exe	41
PID 1688 wrote to memory of 1972	1688	taskeng.exe	41
PID 1688 wrote to memory of 988	1688	taskeng.exe	42
PID 1688 wrote to memory of 988	1688	taskeng.exe	42
PID 1688 wrote to memory of 988	1688	taskeng.exe	42

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\RobloxFlingV4.exe
"C:\Users\Admin\AppData\Local\Temp\RobloxFlingV4.exe"
1⤵
- 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:2904
- 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\RobloxFlingV4.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2820
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'RobloxFlingV4.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2964
- 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\svchost'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2956
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2228
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Admin\AppData\Roaming\svchost"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2200

C:\Windows\system32\taskeng.exe
taskeng.exe {3E7F673D-F1DD-4E3E-AF8B-50CFD50787BA} S-1-5-21-3692679935-4019334568-335155002-1000:BCXRJFKE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1688
- C:\Users\Admin\AppData\Roaming\svchost
  C:\Users\Admin\AppData\Roaming\svchost
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1972
- C:\Users\Admin\AppData\Roaming\svchost
  C:\Users\Admin\AppData\Roaming\svchost
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:988

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\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
c5030f777f7d621bcec317fba0757333

SHA1
68a1f9a0f28da2ff4f577bb9d4dffbd415951396

SHA256
3d1bbe6ca00d6a85a1d7bbb1910877406f554c07878d5140d2a56b9f46a87d53

SHA512
d9adddd2910dd43a10404532bdacb2d14fcf9cda7689d5c8a345cc4e82bffd9747ff840f88f27c59832d9f5f702def601e7bd32d0ff2b9c419c9d11119645ec7

Download Submit
C:\Users\Admin\AppData\Roaming\svchost

Filesize
77KB

MD5
a3d8c1ce63a239eda1c0958acd5f106f

SHA1
d9b5899773d4250cfa80605bb3524a01aad462b8

SHA256
7b24d9dc380ea21160d1e5f753b4992cdc1c8ebf8071cf87f31ec7a7be55c035

SHA512
cddeaab7f3441aeaf19cdd5cd9560f42b8e6e95752584b7faa868728fb442becfb069eaade6d69c64eefcd20922f6800c136cebdd2d896fa1add896325c908ef

Download Submit
memory/1972-35-0x0000000000D50000-0x0000000000D6A000-memory.dmp

Filesize
104KB

Download
memory/2820-6-0x0000000002750000-0x00000000027D0000-memory.dmp

Filesize
512KB

Download
memory/2820-7-0x000000001B180000-0x000000001B462000-memory.dmp

Filesize
2.9MB

Download
memory/2820-8-0x0000000002490000-0x0000000002498000-memory.dmp

Filesize
32KB

Download
memory/2904-0-0x000007FEF6BB3000-0x000007FEF6BB4000-memory.dmp

Filesize
4KB

Download
memory/2904-1-0x0000000000080000-0x000000000009A000-memory.dmp

Filesize
104KB

Download
memory/2904-26-0x000007FEF6BB3000-0x000007FEF6BB4000-memory.dmp

Filesize
4KB

Download
memory/2904-30-0x000000001B4B0000-0x000000001B530000-memory.dmp

Filesize
512KB

Download
memory/2964-14-0x000000001B1E0000-0x000000001B4C2000-memory.dmp

Filesize
2.9MB

Download
memory/2964-15-0x0000000001DD0000-0x0000000001DD8000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads