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 2 IoCs

resource	yara_rule
behavioral2/memory/3928-1-0x00000000004A0000-0x00000000004BA000-memory.dmp	family_xworm
behavioral2/files/0x000a000000023b72-57.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
5104	powershell.exe
4484	powershell.exe
872	powershell.exe
856	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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	RobloxFlingV4.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
1980	svchost
4468	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-1-5-21-4089630652-1596403869-279772308-1000\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
1008	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
5104	powershell.exe
5104	powershell.exe
4484	powershell.exe
4484	powershell.exe
872	powershell.exe
872	powershell.exe
856	powershell.exe
856	powershell.exe
3928	RobloxFlingV4.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	3928	RobloxFlingV4.exe
Token: SeDebugPrivilege	5104	powershell.exe
Token: SeDebugPrivilege	4484	powershell.exe
Token: SeDebugPrivilege	872	powershell.exe
Token: SeDebugPrivilege	856	powershell.exe
Token: SeDebugPrivilege	3928	RobloxFlingV4.exe
Token: SeDebugPrivilege	1980	svchost
Token: SeDebugPrivilege	4468	svchost

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3928	RobloxFlingV4.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3928 wrote to memory of 5104	3928	RobloxFlingV4.exe	89
PID 3928 wrote to memory of 5104	3928	RobloxFlingV4.exe	89
PID 3928 wrote to memory of 4484	3928	RobloxFlingV4.exe	92
PID 3928 wrote to memory of 4484	3928	RobloxFlingV4.exe	92
PID 3928 wrote to memory of 872	3928	RobloxFlingV4.exe	96
PID 3928 wrote to memory of 872	3928	RobloxFlingV4.exe	96
PID 3928 wrote to memory of 856	3928	RobloxFlingV4.exe	98
PID 3928 wrote to memory of 856	3928	RobloxFlingV4.exe	98
PID 3928 wrote to memory of 1008	3928	RobloxFlingV4.exe	100
PID 3928 wrote to memory of 1008	3928	RobloxFlingV4.exe	100

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⤵
- 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:3928
- 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:5104
- 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:4484
- 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:872
- 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:856
- 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:1008

C:\Users\Admin\AppData\Roaming\svchost
C:\Users\Admin\AppData\Roaming\svchost
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1980

C:\Users\Admin\AppData\Roaming\svchost
C:\Users\Admin\AppData\Roaming\svchost
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4468

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\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\svchost.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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

Filesize
944B

MD5
e243a38635ff9a06c87c2a61a2200656

SHA1
ecd95ed5bf1a9fbe96a8448fc2814a0210fa2afc

SHA256
af5782703f3f2d5a29fb313dae6680a64134db26064d4a321a3f23b75f6ca00f

SHA512
4418957a1b10eee44cf270c81816ae707352411c4f5ac14b6b61ab537c91480e24e0a0a2c276a6291081b4984c123cf673a45dcedb0ceeef682054ba0fc19cb4

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

Filesize
944B

MD5
3e242d3c4b39d344f66c494424020c61

SHA1
194e596f33d54482e7880e91dc05e0d247a46399

SHA256
f688037cb0c9f9c97b3b906a6c0636c91ad1864564feb17bba4973cde361172e

SHA512
27c1cd6d72554fdce3b960458a1a6bd3f740aa7c22a313a80b043db283a224bf390648b9e59e6bdbf48020d082d728fbde569bee4ee2a610f21d659a7b3dfa02

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

Filesize
944B

MD5
120c6c9af4de2accfcff2ed8c3aab1af

SHA1
504f64ae4ac9c4fe308a6a50be24fe464f3dad95

SHA256
461315e4057c3fa4d0031df3f7e6511914f082698b6c41f5c2ada831ceffb222

SHA512
041712168718dff702da8203b4089b2e57db98ce503b8ecf36809dec0cd7a595a0d427caa960bc1bd29cbedc85ad3262773f2077a476b85aca387d48f7b07ba2

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5kg0yenw.y1d.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
77KB

MD5
a3d8c1ce63a239eda1c0958acd5f106f

SHA1
d9b5899773d4250cfa80605bb3524a01aad462b8

SHA256
7b24d9dc380ea21160d1e5f753b4992cdc1c8ebf8071cf87f31ec7a7be55c035

SHA512
cddeaab7f3441aeaf19cdd5cd9560f42b8e6e95752584b7faa868728fb442becfb069eaade6d69c64eefcd20922f6800c136cebdd2d896fa1add896325c908ef

Download Submit
memory/3928-55-0x00007FFF65FE3000-0x00007FFF65FE5000-memory.dmp

Filesize
8KB

Download
memory/3928-54-0x00007FFF65FE0000-0x00007FFF66AA1000-memory.dmp

Filesize
10.8MB

Download
memory/3928-0-0x00007FFF65FE3000-0x00007FFF65FE5000-memory.dmp

Filesize
8KB

Download
memory/3928-56-0x00007FFF65FE0000-0x00007FFF66AA1000-memory.dmp

Filesize
10.8MB

Download
memory/3928-1-0x00000000004A0000-0x00000000004BA000-memory.dmp

Filesize
104KB

Download
memory/5104-16-0x00007FFF65FE0000-0x00007FFF66AA1000-memory.dmp

Filesize
10.8MB

Download
memory/5104-13-0x00007FFF65FE0000-0x00007FFF66AA1000-memory.dmp

Filesize
10.8MB

Download
memory/5104-12-0x00007FFF65FE0000-0x00007FFF66AA1000-memory.dmp

Filesize
10.8MB

Download
memory/5104-7-0x0000017563ED0000-0x0000017563EF2000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads