xworm | 995b076987f2c8c9217c04b52f4a618dd317d5d5415b3898ba107d12a8e9522d

General

Target

Nerest sofr/!LOADER.exe
Size

125KB
MD5

0324d4d7ff2026809d8c3f4bd0f3573e
SHA1

73f39a2778bbaa29246a75a7274b8bc7836bd329
SHA256

e14dbac690979b4fa9b2fee4a8221bfdcb03500458d3f9c8912fa1e0e4674492
SHA512

0209d6abb503a2698ee3bb8393da8b7622c3f6318f7aff8173a2406abc31d5d422002ab47113a85e2b7dc292d6735c23fd083aa1c1de4dd275a6e0f28e091f6b
SSDEEP

3072:3uZ+4zKUSfFzqbaQgKA64kCOd4pUzaewwQU4OHRemSL:3gKJFzqb3A64kK+zBuU4OIm

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

back-spots.gl.at.ply.gg:21395

Attributes

Install_directory
%Temp%
install_file
USB.exe

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/memory/1688-1-0x00000000000E0000-0x0000000000106000-memory.dmp	family_xworm
behavioral1/files/0x000a0000000120fd-33.dat	family_xworm
behavioral1/memory/1172-35-0x0000000001050000-0x0000000001076000-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
2668	powershell.exe
2660	powershell.exe
1640	powershell.exe
2840	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
1172	conhost

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-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\conhost = "C:\\Users\\Admin\\AppData\\Local\\Temp\\conhost"	!LOADER.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
4	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
2580	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2840	powershell.exe
2668	powershell.exe
2660	powershell.exe
1640	powershell.exe
1688	!LOADER.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	1688	!LOADER.exe
Token: SeDebugPrivilege	2840	powershell.exe
Token: SeDebugPrivilege	2668	powershell.exe
Token: SeDebugPrivilege	2660	powershell.exe
Token: SeDebugPrivilege	1640	powershell.exe
Token: SeDebugPrivilege	1688	!LOADER.exe
Token: SeDebugPrivilege	1172	conhost

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1688	!LOADER.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1688 wrote to memory of 2840	1688	!LOADER.exe	30
PID 1688 wrote to memory of 2840	1688	!LOADER.exe	30
PID 1688 wrote to memory of 2840	1688	!LOADER.exe	30
PID 1688 wrote to memory of 2668	1688	!LOADER.exe	32
PID 1688 wrote to memory of 2668	1688	!LOADER.exe	32
PID 1688 wrote to memory of 2668	1688	!LOADER.exe	32
PID 1688 wrote to memory of 2660	1688	!LOADER.exe	34
PID 1688 wrote to memory of 2660	1688	!LOADER.exe	34
PID 1688 wrote to memory of 2660	1688	!LOADER.exe	34
PID 1688 wrote to memory of 1640	1688	!LOADER.exe	36
PID 1688 wrote to memory of 1640	1688	!LOADER.exe	36
PID 1688 wrote to memory of 1640	1688	!LOADER.exe	36
PID 1688 wrote to memory of 2580	1688	!LOADER.exe	38
PID 1688 wrote to memory of 2580	1688	!LOADER.exe	38
PID 1688 wrote to memory of 2580	1688	!LOADER.exe	38
PID 2980 wrote to memory of 1172	2980	taskeng.exe	41
PID 2980 wrote to memory of 1172	2980	taskeng.exe	41
PID 2980 wrote to memory of 1172	2980	taskeng.exe	41

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\Nerest sofr\!LOADER.exe
"C:\Users\Admin\AppData\Local\Temp\Nerest sofr\!LOADER.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:1688
- 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\Nerest sofr\!LOADER.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2840
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '!LOADER.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2668
- 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\conhost'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2660
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'conhost'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1640
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "conhost" /tr "C:\Users\Admin\AppData\Local\Temp\conhost"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2580

C:\Windows\system32\taskeng.exe
taskeng.exe {6593733C-0D3B-4342-93E6-D436DDD15F18} S-1-5-21-2703099537-420551529-3771253338-1000:XECUDNCD\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2980
- C:\Users\Admin\AppData\Local\Temp\conhost
  C:\Users\Admin\AppData\Local\Temp\conhost
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1172

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\conhost

Filesize
125KB

MD5
0324d4d7ff2026809d8c3f4bd0f3573e

SHA1
73f39a2778bbaa29246a75a7274b8bc7836bd329

SHA256
e14dbac690979b4fa9b2fee4a8221bfdcb03500458d3f9c8912fa1e0e4674492

SHA512
0209d6abb503a2698ee3bb8393da8b7622c3f6318f7aff8173a2406abc31d5d422002ab47113a85e2b7dc292d6735c23fd083aa1c1de4dd275a6e0f28e091f6b

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\7D35H6SVCLXQ1G1FNM6T.temp

Filesize
7KB

MD5
503b3d6d29ba834c312b92da98f8be94

SHA1
e6ad6689ad4e111718f0652346a91f17fb3c9095

SHA256
81b85f0be06d27b178f87185ec6d1935da4670adab6ba8583bcb678d8d4a0adc

SHA512
0b231b8c9dd42737cc211ae4211bc0bd9952d847dc620df466ac62eed2f82a1560de5580cf2b3449b2fab437256264d670f77d624c2f282710bd3dc65bdf0426

Download Submit
memory/1172-35-0x0000000001050000-0x0000000001076000-memory.dmp

Filesize
152KB

Download
memory/1688-27-0x000007FEF6323000-0x000007FEF6324000-memory.dmp

Filesize
4KB

Download
memory/1688-0-0x000007FEF6323000-0x000007FEF6324000-memory.dmp

Filesize
4KB

Download
memory/1688-31-0x000007FEF6320000-0x000007FEF6D0C000-memory.dmp

Filesize
9.9MB

Download
memory/1688-2-0x000007FEF6320000-0x000007FEF6D0C000-memory.dmp

Filesize
9.9MB

Download
memory/1688-1-0x00000000000E0000-0x0000000000106000-memory.dmp

Filesize
152KB

Download
memory/2668-15-0x000000001B750000-0x000000001BA32000-memory.dmp

Filesize
2.9MB

Download
memory/2668-16-0x0000000002390000-0x0000000002398000-memory.dmp

Filesize
32KB

Download
memory/2840-8-0x000000001B790000-0x000000001BA72000-memory.dmp

Filesize
2.9MB

Download
memory/2840-9-0x0000000001E10000-0x0000000001E18000-memory.dmp

Filesize
32KB

Download
memory/2840-7-0x0000000002E50000-0x0000000002ED0000-memory.dmp

Filesize
512KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads