xworm | a2926efee48295c2660bb5b461da3b004a63dbf61eb7dec707a1550fb58c35be

General

Target

aW4gYmFzZTY0.exe
Size

79KB
MD5

10877ec3912d6ea504445afae9f81774
SHA1

2e33867a1e92173d44908f19476a906bd4f3c894
SHA256

a2926efee48295c2660bb5b461da3b004a63dbf61eb7dec707a1550fb58c35be
SHA512

afd3fcf65f051f4e0c05c92e2fb7cba781957e601565292de5c1b93910e9f73160e3dd0f12922708137c115181300df572d000584d06572771baff8095e979cf
SSDEEP

1536:NXxJcCWxlmDiZohvPyiyHo3bc8lCG93s6kc6mgOMOz3tjq8q:FSPmGZ8pyHo3bTfnlgOMOz3t9q

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

3.0

C2

lunassworld-50930.portmap.host:50930

Attributes

Install_directory
%AppData%
install_file
USB.exe

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/2768-1-0x0000000000FB0000-0x0000000000FCA000-memory.dmp	family_xworm
behavioral1/files/0x0019000000005586-29.dat	family_xworm
behavioral1/memory/2848-37-0x0000000000D60000-0x0000000000D7A000-memory.dmp	family_xworm
behavioral1/memory/1404-39-0x00000000013A0000-0x00000000013BA000-memory.dmp	family_xworm

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

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
1348	powershell.exe
2520	powershell.exe
2428	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\aW4gYmFzZTY0.lnk	aW4gYmFzZTY0.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\aW4gYmFzZTY0.lnk	aW4gYmFzZTY0.exe

Executes dropped EXE 2 IoCs

pid	Process
2848	aW4gYmFzZTY0.exe
1404	aW4gYmFzZTY0.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-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Windows\CurrentVersion\Run\aW4gYmFzZTY0 = "C:\\Users\\Admin\\AppData\\Roaming\\aW4gYmFzZTY0.exe"	aW4gYmFzZTY0.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

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
1368	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2520	powershell.exe
2428	powershell.exe
1348	powershell.exe
2768	aW4gYmFzZTY0.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	2768	aW4gYmFzZTY0.exe
Token: SeDebugPrivilege	2520	powershell.exe
Token: SeDebugPrivilege	2428	powershell.exe
Token: SeDebugPrivilege	1348	powershell.exe
Token: SeDebugPrivilege	2768	aW4gYmFzZTY0.exe
Token: SeDebugPrivilege	2848	aW4gYmFzZTY0.exe
Token: SeDebugPrivilege	1404	aW4gYmFzZTY0.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2768	aW4gYmFzZTY0.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2768 wrote to memory of 2520	2768	aW4gYmFzZTY0.exe	29
PID 2768 wrote to memory of 2520	2768	aW4gYmFzZTY0.exe	29
PID 2768 wrote to memory of 2520	2768	aW4gYmFzZTY0.exe	29
PID 2768 wrote to memory of 2428	2768	aW4gYmFzZTY0.exe	31
PID 2768 wrote to memory of 2428	2768	aW4gYmFzZTY0.exe	31
PID 2768 wrote to memory of 2428	2768	aW4gYmFzZTY0.exe	31
PID 2768 wrote to memory of 1348	2768	aW4gYmFzZTY0.exe	33
PID 2768 wrote to memory of 1348	2768	aW4gYmFzZTY0.exe	33
PID 2768 wrote to memory of 1348	2768	aW4gYmFzZTY0.exe	33
PID 2768 wrote to memory of 1368	2768	aW4gYmFzZTY0.exe	35
PID 2768 wrote to memory of 1368	2768	aW4gYmFzZTY0.exe	35
PID 2768 wrote to memory of 1368	2768	aW4gYmFzZTY0.exe	35
PID 2004 wrote to memory of 2848	2004	taskeng.exe	40
PID 2004 wrote to memory of 2848	2004	taskeng.exe	40
PID 2004 wrote to memory of 2848	2004	taskeng.exe	40
PID 2004 wrote to memory of 1404	2004	taskeng.exe	41
PID 2004 wrote to memory of 1404	2004	taskeng.exe	41
PID 2004 wrote to memory of 1404	2004	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\aW4gYmFzZTY0.exe
"C:\Users\Admin\AppData\Local\Temp\aW4gYmFzZTY0.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:2768
- 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\aW4gYmFzZTY0.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2520
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'aW4gYmFzZTY0.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2428
- 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\aW4gYmFzZTY0.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1348
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "aW4gYmFzZTY0" /tr "C:\Users\Admin\AppData\Roaming\aW4gYmFzZTY0.exe"
  2⤵
  - Creates scheduled task(s)
  PID:1368

C:\Windows\system32\taskeng.exe
taskeng.exe {58F72DAC-B991-41CE-83D3-F06E64FDDEFF} S-1-5-21-2721934792-624042501-2768869379-1000:BISMIZHX\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2004
- C:\Users\Admin\AppData\Roaming\aW4gYmFzZTY0.exe
  C:\Users\Admin\AppData\Roaming\aW4gYmFzZTY0.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2848
- C:\Users\Admin\AppData\Roaming\aW4gYmFzZTY0.exe
  C:\Users\Admin\AppData\Roaming\aW4gYmFzZTY0.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1404

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

Scheduled Task/Job

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

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\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
73578bd4d74c3c51f6f4dad47b72b358

SHA1
9ad1109c67317cbb615b7461fa041cf046c569c4

SHA256
96bb619cde927c101227c35c304fa6fb9c77a8756a1d86e0c2ee6da91a3be1ae

SHA512
f28c70581845869526fe26b5e06d30a03b628cb0f0a3498a6c59e105b7b1d16e130cc9958da9dd093cb6059d40c2003e18bd88b7a265a9c85362685b5e2cb778

Download Submit
C:\Users\Admin\AppData\Roaming\aW4gYmFzZTY0.exe

Filesize
79KB

MD5
10877ec3912d6ea504445afae9f81774

SHA1
2e33867a1e92173d44908f19476a906bd4f3c894

SHA256
a2926efee48295c2660bb5b461da3b004a63dbf61eb7dec707a1550fb58c35be

SHA512
afd3fcf65f051f4e0c05c92e2fb7cba781957e601565292de5c1b93910e9f73160e3dd0f12922708137c115181300df572d000584d06572771baff8095e979cf

Download Submit
memory/1404-39-0x00000000013A0000-0x00000000013BA000-memory.dmp

Filesize
104KB

Download
memory/2428-15-0x000000001B640000-0x000000001B922000-memory.dmp

Filesize
2.9MB

Download
memory/2428-16-0x00000000023C0000-0x00000000023C8000-memory.dmp

Filesize
32KB

Download
memory/2520-8-0x000000001B740000-0x000000001BA22000-memory.dmp

Filesize
2.9MB

Download
memory/2520-7-0x0000000002EE0000-0x0000000002F60000-memory.dmp

Filesize
512KB

Download
memory/2520-9-0x0000000001F00000-0x0000000001F08000-memory.dmp

Filesize
32KB

Download
memory/2768-2-0x000007FEF5BA0000-0x000007FEF658C000-memory.dmp

Filesize
9.9MB

Download
memory/2768-0-0x000007FEF5BA3000-0x000007FEF5BA4000-memory.dmp

Filesize
4KB

Download
memory/2768-1-0x0000000000FB0000-0x0000000000FCA000-memory.dmp

Filesize
104KB

Download
memory/2768-31-0x000007FEF5BA3000-0x000007FEF5BA4000-memory.dmp

Filesize
4KB

Download
memory/2768-32-0x000007FEF5BA0000-0x000007FEF658C000-memory.dmp

Filesize
9.9MB

Download
memory/2848-37-0x0000000000D60000-0x0000000000D7A000-memory.dmp

Filesize
104KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads