xworm | fa01f82861a9949b4bddcadd6c2c5fd707b07c6a4090b08a19e932236c04feb9

General

Target

SteamServersFix.exe
Size

327KB
MD5

a4b716a88bd9bffe93238cf361d2bb9b
SHA1

a8d98a27fe2c4d36b0093d518660afe5f8f59208
SHA256

fa01f82861a9949b4bddcadd6c2c5fd707b07c6a4090b08a19e932236c04feb9
SHA512

65d1c05de9634c4fc6562233010b473dabf13507108fd9ba83842598a72270b57added822726bb71585a5c70a8355940258c322cfe427e150d7e579f067421a6
SSDEEP

6144:zqW6/EpyjHwbECuizo+GIIIIIIIhIIIIIIIIIIIIIIIU:zj0tCuizL

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

vshostupdater.duckdns.org:1177

http://vshostupdater.duckdns.org:1177

octothl-21053.portmap.host:21053:1177

189.14.62.242:1177

192.168.1.6:1177

187.18.72.113:1177

189.14.53.123:1177

Attributes

Install_directory
%AppData%
install_file
SteamProcFix.exe

Signatures

Detect Xworm Payload 5 IoCs

resource	yara_rule
behavioral1/memory/2324-1-0x0000000000E00000-0x0000000000E58000-memory.dmp	family_xworm
behavioral1/files/0x0004000000004ed7-10.dat	family_xworm
behavioral1/memory/2576-12-0x00000000013E0000-0x0000000001438000-memory.dmp	family_xworm
behavioral1/memory/2808-15-0x00000000002F0000-0x0000000000348000-memory.dmp	family_xworm
behavioral1/memory/2976-17-0x0000000000E50000-0x0000000000EA8000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
xworm

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
2576	SteamProcFix.exe
2808	SteamProcFix.exe
2976	SteamProcFix.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-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\SteamProcFix = "C:\\Users\\Admin\\AppData\\Roaming\\SteamProcFix.exe"	SteamServersFix.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
1020	schtasks.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2324	SteamServersFix.exe
Token: SeDebugPrivilege	2324	SteamServersFix.exe
Token: SeDebugPrivilege	2576	SteamProcFix.exe
Token: SeDebugPrivilege	2808	SteamProcFix.exe
Token: SeDebugPrivilege	2976	SteamProcFix.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2324 wrote to memory of 1020	2324	SteamServersFix.exe	31
PID 2324 wrote to memory of 1020	2324	SteamServersFix.exe	31
PID 2324 wrote to memory of 1020	2324	SteamServersFix.exe	31
PID 2652 wrote to memory of 2576	2652	taskeng.exe	35
PID 2652 wrote to memory of 2576	2652	taskeng.exe	35
PID 2652 wrote to memory of 2576	2652	taskeng.exe	35
PID 2652 wrote to memory of 2808	2652	taskeng.exe	36
PID 2652 wrote to memory of 2808	2652	taskeng.exe	36
PID 2652 wrote to memory of 2808	2652	taskeng.exe	36
PID 2652 wrote to memory of 2976	2652	taskeng.exe	38
PID 2652 wrote to memory of 2976	2652	taskeng.exe	38
PID 2652 wrote to memory of 2976	2652	taskeng.exe	38

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\SteamServersFix.exe
"C:\Users\Admin\AppData\Local\Temp\SteamServersFix.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2324
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "SteamProcFix" /tr "C:\Users\Admin\AppData\Roaming\SteamProcFix.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1020

C:\Windows\system32\taskeng.exe
taskeng.exe {8A8EFB4D-93E9-4B94-8C60-A685B84D4003} S-1-5-21-312935884-697965778-3955649944-1000:MXQFNXLT\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2652
- C:\Users\Admin\AppData\Roaming\SteamProcFix.exe
  C:\Users\Admin\AppData\Roaming\SteamProcFix.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2576
- C:\Users\Admin\AppData\Roaming\SteamProcFix.exe
  C:\Users\Admin\AppData\Roaming\SteamProcFix.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2808
- C:\Users\Admin\AppData\Roaming\SteamProcFix.exe
  C:\Users\Admin\AppData\Roaming\SteamProcFix.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2976

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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\SteamProcFix.exe

Filesize
327KB

MD5
a4b716a88bd9bffe93238cf361d2bb9b

SHA1
a8d98a27fe2c4d36b0093d518660afe5f8f59208

SHA256
fa01f82861a9949b4bddcadd6c2c5fd707b07c6a4090b08a19e932236c04feb9

SHA512
65d1c05de9634c4fc6562233010b473dabf13507108fd9ba83842598a72270b57added822726bb71585a5c70a8355940258c322cfe427e150d7e579f067421a6

Download Submit
memory/2324-0-0x000007FEF5E03000-0x000007FEF5E04000-memory.dmp

Filesize
4KB

Download
memory/2324-1-0x0000000000E00000-0x0000000000E58000-memory.dmp

Filesize
352KB

Download
memory/2324-6-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

Filesize
9.9MB

Download
memory/2324-7-0x000007FEF5E03000-0x000007FEF5E04000-memory.dmp

Filesize
4KB

Download
memory/2324-8-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

Filesize
9.9MB

Download
memory/2576-12-0x00000000013E0000-0x0000000001438000-memory.dmp

Filesize
352KB

Download
memory/2808-15-0x00000000002F0000-0x0000000000348000-memory.dmp

Filesize
352KB

Download
memory/2976-17-0x0000000000E50000-0x0000000000EA8000-memory.dmp

Filesize
352KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads