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/2528-1-0x0000000000C20000-0x0000000000C3A000-memory.dmp	family_xworm
behavioral2/files/0x0010000000023b60-57.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
2096	powershell.exe
4920	powershell.exe
4836	powershell.exe
2128	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-1-5-21-4050598569-1597076380-177084960-1000\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
3556	svchost
2708	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-1-5-21-4050598569-1597076380-177084960-1000\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
3036	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4920	powershell.exe
4920	powershell.exe
4836	powershell.exe
4836	powershell.exe
2128	powershell.exe
2128	powershell.exe
2096	powershell.exe
2096	powershell.exe
2528	RobloxFlingV4.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2528	RobloxFlingV4.exe
Token: SeDebugPrivilege	4920	powershell.exe
Token: SeDebugPrivilege	4836	powershell.exe
Token: SeDebugPrivilege	2128	powershell.exe
Token: SeDebugPrivilege	2096	powershell.exe
Token: SeDebugPrivilege	2528	RobloxFlingV4.exe
Token: SeDebugPrivilege	3556	svchost
Token: SeDebugPrivilege	2708	svchost

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2528	RobloxFlingV4.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2528 wrote to memory of 4920	2528	RobloxFlingV4.exe	89
PID 2528 wrote to memory of 4920	2528	RobloxFlingV4.exe	89
PID 2528 wrote to memory of 4836	2528	RobloxFlingV4.exe	91
PID 2528 wrote to memory of 4836	2528	RobloxFlingV4.exe	91
PID 2528 wrote to memory of 2128	2528	RobloxFlingV4.exe	95
PID 2528 wrote to memory of 2128	2528	RobloxFlingV4.exe	95
PID 2528 wrote to memory of 2096	2528	RobloxFlingV4.exe	99
PID 2528 wrote to memory of 2096	2528	RobloxFlingV4.exe	99
PID 2528 wrote to memory of 3036	2528	RobloxFlingV4.exe	101
PID 2528 wrote to memory of 3036	2528	RobloxFlingV4.exe	101

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:2528
- 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:4920
- 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:4836
- 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:2128
- 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:2096
- 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:3036

C:\Users\Admin\AppData\Roaming\svchost
C:\Users\Admin\AppData\Roaming\svchost
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3556

C:\Users\Admin\AppData\Roaming\svchost
C:\Users\Admin\AppData\Roaming\svchost
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2708

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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
944B

MD5
da5c82b0e070047f7377042d08093ff4

SHA1
89d05987cd60828cca516c5c40c18935c35e8bd3

SHA256
77a94ef8c4258445d538a6006ffadb05afdf888f6f044e1e5466b981a07f16c5

SHA512
7360311a3c97b73dd3f6d7179cd979e0e20d69f380d38292447e17e369087d9dd5acb66cd0cbdd95ac4bfb16e5a1b86825f835a8d45b14ea9812102cff59704b

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

Filesize
944B

MD5
10890cda4b6eab618e926c4118ab0647

SHA1
1e1d63b73a0e6c7575f458b3c7917a9ce5ba776d

SHA256
00f8a035324d39bd62e6dee5e1b480069015471c487ebee4479e6990ea9ddb14

SHA512
a2ee84006c24a36f25e0bca0772430d64e3791f233da916aecdeae6712763e77d55bbbd00dc8f6b2b3887f3c26ab3980b96c5f46cc823e81e28abbbc5fc78221

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_tc3eoxw4.z1v.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/2528-55-0x00007FFC53830000-0x00007FFC542F1000-memory.dmp

Filesize
10.8MB

Download
memory/2528-0-0x00007FFC53833000-0x00007FFC53835000-memory.dmp

Filesize
8KB

Download
memory/2528-56-0x00007FFC53830000-0x00007FFC542F1000-memory.dmp

Filesize
10.8MB

Download
memory/2528-1-0x0000000000C20000-0x0000000000C3A000-memory.dmp

Filesize
104KB

Download
memory/4920-17-0x00007FFC53830000-0x00007FFC542F1000-memory.dmp

Filesize
10.8MB

Download
memory/4920-14-0x00007FFC53830000-0x00007FFC542F1000-memory.dmp

Filesize
10.8MB

Download
memory/4920-13-0x00007FFC53830000-0x00007FFC542F1000-memory.dmp

Filesize
10.8MB

Download
memory/4920-12-0x00007FFC53830000-0x00007FFC542F1000-memory.dmp

Filesize
10.8MB

Download
memory/4920-2-0x0000022860F20000-0x0000022860F42000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads