xworm | 995b076987f2c8c9217c04b52f4a618dd317d5d5415b3898ba107d12a8e9522d

General

Target

Nerest sofr/bin/!LOADER.exe
Size

6.9MB
MD5

de24df122fbc3293087f4939c6fb8b16
SHA1

a061e90c61d9ca357d0f4592bd0768432338fa94
SHA256

ccccf05053891883f6268a31390b3a731fa6b787b16e2c0dd429a31e5878acb0
SHA512

ac27ee610c535d3f5eaf6c03ffc7dd59d30f96bb81e029258f507cffdb243db87533ca10b79846810e624223ac6cd5515c10832f1e907fd37edd4ef6365eb503
SSDEEP

196608:GKah1rbvnKfTMLXla7cJz/FUtUK+hLFV/Ap:GKa7r+fTMLXla7cJTM7+h4p

Score

10^/10

xworm discovery 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 4 IoCs

resource	yara_rule
behavioral3/files/0x00070000000120fb-2.dat	family_xworm
behavioral3/memory/2784-8-0x0000000000080000-0x00000000000A6000-memory.dmp	family_xworm
behavioral3/memory/2196-42-0x0000000000A00000-0x0000000000A26000-memory.dmp	family_xworm
behavioral3/memory/2996-46-0x0000000000110000-0x0000000000136000-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
276	powershell.exe
2396	powershell.exe
2480	powershell.exe
2404	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
2784	!LOADER.exe
2196	conhost
2996	conhost

Loads dropped DLL 1 IoCs

pid	Process
2184	!LOADER.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-1-5-21-2703099537-420551529-3771253338-1000\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

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	!LOADER.exe

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
348	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2404	powershell.exe
276	powershell.exe
2396	powershell.exe
2480	powershell.exe
2784	!LOADER.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2784	!LOADER.exe
Token: SeDebugPrivilege	2404	powershell.exe
Token: SeDebugPrivilege	276	powershell.exe
Token: SeDebugPrivilege	2396	powershell.exe
Token: SeDebugPrivilege	2480	powershell.exe
Token: SeDebugPrivilege	2784	!LOADER.exe
Token: SeDebugPrivilege	2196	conhost
Token: SeDebugPrivilege	2996	conhost

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2784	!LOADER.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 2184 wrote to memory of 2784	2184	!LOADER.exe	30
PID 2184 wrote to memory of 2784	2184	!LOADER.exe	30
PID 2184 wrote to memory of 2784	2184	!LOADER.exe	30
PID 2184 wrote to memory of 2784	2184	!LOADER.exe	30
PID 2784 wrote to memory of 2404	2784	!LOADER.exe	32
PID 2784 wrote to memory of 2404	2784	!LOADER.exe	32
PID 2784 wrote to memory of 2404	2784	!LOADER.exe	32
PID 2784 wrote to memory of 276	2784	!LOADER.exe	34
PID 2784 wrote to memory of 276	2784	!LOADER.exe	34
PID 2784 wrote to memory of 276	2784	!LOADER.exe	34
PID 2784 wrote to memory of 2396	2784	!LOADER.exe	36
PID 2784 wrote to memory of 2396	2784	!LOADER.exe	36
PID 2784 wrote to memory of 2396	2784	!LOADER.exe	36
PID 2784 wrote to memory of 2480	2784	!LOADER.exe	38
PID 2784 wrote to memory of 2480	2784	!LOADER.exe	38
PID 2784 wrote to memory of 2480	2784	!LOADER.exe	38
PID 2784 wrote to memory of 348	2784	!LOADER.exe	40
PID 2784 wrote to memory of 348	2784	!LOADER.exe	40
PID 2784 wrote to memory of 348	2784	!LOADER.exe	40
PID 1092 wrote to memory of 2196	1092	taskeng.exe	43
PID 1092 wrote to memory of 2196	1092	taskeng.exe	43
PID 1092 wrote to memory of 2196	1092	taskeng.exe	43
PID 1092 wrote to memory of 2996	1092	taskeng.exe	45
PID 1092 wrote to memory of 2996	1092	taskeng.exe	45
PID 1092 wrote to memory of 2996	1092	taskeng.exe	45

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\bin\!LOADER.exe
"C:\Users\Admin\AppData\Local\Temp\Nerest sofr\bin\!LOADER.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2184
- C:\Users\Admin\AppData\Local\Temp\!LOADER.exe
  "C:\Users\Admin\AppData\Local\Temp\!LOADER.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2784
- - 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\!LOADER.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2404
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '!LOADER.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:276
- - 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'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2396
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'conhost'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2480
- - 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"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:348

C:\Windows\system32\taskeng.exe
taskeng.exe {CEF0C02E-AC93-4FE5-98ED-49D920F1B98E} S-1-5-21-2703099537-420551529-3771253338-1000:XECUDNCD\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1092
- C:\Users\Admin\AppData\Local\Temp\conhost
  C:\Users\Admin\AppData\Local\Temp\conhost
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2196
- C:\Users\Admin\AppData\Local\Temp\conhost
  C:\Users\Admin\AppData\Local\Temp\conhost
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2996

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

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
46b6736401aac287fc56faf4e6f4f170

SHA1
fc0263b5f53038ae6b3c040d57a622cf5b229996

SHA256
4d7ef3c4cece49d8027e02836f4702700cc89ce884ae7477f082c42d03d76aaa

SHA512
4f4f0699f6095d2e40377dc52c1b57c1c1b6c366993596035c5121f84ba1c80177a32637bf76d27bb218ffcfff03e9fc60c18637243c5092f376589a7b3f0ce8

Download Submit
\Users\Admin\AppData\Local\Temp\!LOADER.exe

Filesize
125KB

MD5
0324d4d7ff2026809d8c3f4bd0f3573e

SHA1
73f39a2778bbaa29246a75a7274b8bc7836bd329

SHA256
e14dbac690979b4fa9b2fee4a8221bfdcb03500458d3f9c8912fa1e0e4674492

SHA512
0209d6abb503a2698ee3bb8393da8b7622c3f6318f7aff8173a2406abc31d5d422002ab47113a85e2b7dc292d6735c23fd083aa1c1de4dd275a6e0f28e091f6b

Download Submit
memory/276-22-0x0000000002790000-0x0000000002798000-memory.dmp

Filesize
32KB

Download
memory/276-21-0x000000001B6B0000-0x000000001B992000-memory.dmp

Filesize
2.9MB

Download
memory/2184-6-0x0000000000400000-0x0000000000AE2000-memory.dmp

Filesize
6.9MB

Download
memory/2196-42-0x0000000000A00000-0x0000000000A26000-memory.dmp

Filesize
152KB

Download
memory/2404-14-0x000000001B4B0000-0x000000001B792000-memory.dmp

Filesize
2.9MB

Download
memory/2404-15-0x0000000002810000-0x0000000002818000-memory.dmp

Filesize
32KB

Download
memory/2784-9-0x000007FEF5D30000-0x000007FEF671C000-memory.dmp

Filesize
9.9MB

Download
memory/2784-8-0x0000000000080000-0x00000000000A6000-memory.dmp

Filesize
152KB

Download
memory/2784-37-0x000007FEF5D33000-0x000007FEF5D34000-memory.dmp

Filesize
4KB

Download
memory/2784-38-0x000007FEF5D30000-0x000007FEF671C000-memory.dmp

Filesize
9.9MB

Download
memory/2784-7-0x000007FEF5D33000-0x000007FEF5D34000-memory.dmp

Filesize
4KB

Download
memory/2784-43-0x000000001AB00000-0x000000001AB0C000-memory.dmp

Filesize
48KB

Download
memory/2996-46-0x0000000000110000-0x0000000000136000-memory.dmp

Filesize
152KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads