xworm | 1bf622f63d06acd305b37aefb205cf4f54fc333e1a448dddd1212d33ab6de7e1

Analysis

max time kernel
148s
max time network
147s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
25-05-2024 21:18

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General

Target

BlueMan Loader.exe
Size

93KB
MD5

b3db179a713fc8a3c6652df066c3aefe
SHA1

36887220e66847fdaf81d5914857581bf331fedc
SHA256

1bf622f63d06acd305b37aefb205cf4f54fc333e1a448dddd1212d33ab6de7e1
SHA512

2dadd24511d97fe795bda7db83e1841b73f5b0d44625101c9a6ce47e9363cfa1950c86f0994552f35c3018680844cf3dc68bc3782654089f08955164c49331ad
SSDEEP

1536:5DwIbNTR1Jz7WkNP6Wi67umqhPb1SUmYLs6xU6XMObIv721GbYRr2:BwmN1ikNPI67lqhPb1SULLs6xdMObIvN

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

3.1

uk2.localto.net:1172

Attributes

Install_directory
%ProgramData%
install_file
USB.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/2820-1-0x00000000008B0000-0x00000000008CC000-memory.dmp	family_xworm
behavioral1/files/0x000d00000001ac00-145.dat	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
1468	powershell.exe
2348	powershell.exe
1336	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
596	BlueMan Loader.exe
2704	BlueMan Loader.exe
4192	BlueMan 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-1-5-21-3699363923-1875576828-3287151903-1000\Software\Microsoft\Windows\CurrentVersion\Run\BlueMan Loader = "C:\\ProgramData\\BlueMan Loader.exe"	BlueMan 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
1	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
3964	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2820	BlueMan Loader.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1468	powershell.exe
1468	powershell.exe
1468	powershell.exe
2348	powershell.exe
2348	powershell.exe
2348	powershell.exe
1336	powershell.exe
1336	powershell.exe
1336	powershell.exe
2820	BlueMan Loader.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2820	BlueMan Loader.exe
Token: SeDebugPrivilege	1468	powershell.exe
Token: SeIncreaseQuotaPrivilege	1468	powershell.exe
Token: SeSecurityPrivilege	1468	powershell.exe
Token: SeTakeOwnershipPrivilege	1468	powershell.exe
Token: SeLoadDriverPrivilege	1468	powershell.exe
Token: SeSystemProfilePrivilege	1468	powershell.exe
Token: SeSystemtimePrivilege	1468	powershell.exe
Token: SeProfSingleProcessPrivilege	1468	powershell.exe
Token: SeIncBasePriorityPrivilege	1468	powershell.exe
Token: SeCreatePagefilePrivilege	1468	powershell.exe
Token: SeBackupPrivilege	1468	powershell.exe
Token: SeRestorePrivilege	1468	powershell.exe
Token: SeShutdownPrivilege	1468	powershell.exe
Token: SeDebugPrivilege	1468	powershell.exe
Token: SeSystemEnvironmentPrivilege	1468	powershell.exe
Token: SeRemoteShutdownPrivilege	1468	powershell.exe
Token: SeUndockPrivilege	1468	powershell.exe
Token: SeManageVolumePrivilege	1468	powershell.exe
Token: 33	1468	powershell.exe
Token: 34	1468	powershell.exe
Token: 35	1468	powershell.exe
Token: 36	1468	powershell.exe
Token: SeDebugPrivilege	2348	powershell.exe
Token: SeIncreaseQuotaPrivilege	2348	powershell.exe
Token: SeSecurityPrivilege	2348	powershell.exe
Token: SeTakeOwnershipPrivilege	2348	powershell.exe
Token: SeLoadDriverPrivilege	2348	powershell.exe
Token: SeSystemProfilePrivilege	2348	powershell.exe
Token: SeSystemtimePrivilege	2348	powershell.exe
Token: SeProfSingleProcessPrivilege	2348	powershell.exe
Token: SeIncBasePriorityPrivilege	2348	powershell.exe
Token: SeCreatePagefilePrivilege	2348	powershell.exe
Token: SeBackupPrivilege	2348	powershell.exe
Token: SeRestorePrivilege	2348	powershell.exe
Token: SeShutdownPrivilege	2348	powershell.exe
Token: SeDebugPrivilege	2348	powershell.exe
Token: SeSystemEnvironmentPrivilege	2348	powershell.exe
Token: SeRemoteShutdownPrivilege	2348	powershell.exe
Token: SeUndockPrivilege	2348	powershell.exe
Token: SeManageVolumePrivilege	2348	powershell.exe
Token: 33	2348	powershell.exe
Token: 34	2348	powershell.exe
Token: 35	2348	powershell.exe
Token: 36	2348	powershell.exe
Token: SeDebugPrivilege	1336	powershell.exe
Token: SeIncreaseQuotaPrivilege	1336	powershell.exe
Token: SeSecurityPrivilege	1336	powershell.exe
Token: SeTakeOwnershipPrivilege	1336	powershell.exe
Token: SeLoadDriverPrivilege	1336	powershell.exe
Token: SeSystemProfilePrivilege	1336	powershell.exe
Token: SeSystemtimePrivilege	1336	powershell.exe
Token: SeProfSingleProcessPrivilege	1336	powershell.exe
Token: SeIncBasePriorityPrivilege	1336	powershell.exe
Token: SeCreatePagefilePrivilege	1336	powershell.exe
Token: SeBackupPrivilege	1336	powershell.exe
Token: SeRestorePrivilege	1336	powershell.exe
Token: SeShutdownPrivilege	1336	powershell.exe
Token: SeDebugPrivilege	1336	powershell.exe
Token: SeSystemEnvironmentPrivilege	1336	powershell.exe
Token: SeRemoteShutdownPrivilege	1336	powershell.exe
Token: SeUndockPrivilege	1336	powershell.exe
Token: SeManageVolumePrivilege	1336	powershell.exe
Token: 33	1336	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2820	BlueMan Loader.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2820 wrote to memory of 1468	2820	BlueMan Loader.exe	75
PID 2820 wrote to memory of 1468	2820	BlueMan Loader.exe	75
PID 2820 wrote to memory of 2348	2820	BlueMan Loader.exe	78
PID 2820 wrote to memory of 2348	2820	BlueMan Loader.exe	78
PID 2820 wrote to memory of 1336	2820	BlueMan Loader.exe	80
PID 2820 wrote to memory of 1336	2820	BlueMan Loader.exe	80
PID 2820 wrote to memory of 3964	2820	BlueMan Loader.exe	82
PID 2820 wrote to memory of 3964	2820	BlueMan Loader.exe	82

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\BlueMan Loader.exe
"C:\Users\Admin\AppData\Local\Temp\BlueMan Loader.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2820
- 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\BlueMan Loader.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1468
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'BlueMan Loader.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2348
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\BlueMan Loader.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1336
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "BlueMan Loader" /tr "C:\ProgramData\BlueMan Loader.exe"
  2⤵
  - Creates scheduled task(s)
  PID:3964

C:\ProgramData\BlueMan Loader.exe
"C:\ProgramData\BlueMan Loader.exe"
1⤵
- Executes dropped EXE
PID:596

C:\ProgramData\BlueMan Loader.exe
"C:\ProgramData\BlueMan Loader.exe"
1⤵
- Executes dropped EXE
PID:2704

C:\ProgramData\BlueMan Loader.exe
"C:\ProgramData\BlueMan Loader.exe"
1⤵
- Executes dropped EXE
PID:4192

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\BlueMan Loader.exe

Filesize
93KB

MD5
b3db179a713fc8a3c6652df066c3aefe

SHA1
36887220e66847fdaf81d5914857581bf331fedc

SHA256
1bf622f63d06acd305b37aefb205cf4f54fc333e1a448dddd1212d33ab6de7e1

SHA512
2dadd24511d97fe795bda7db83e1841b73f5b0d44625101c9a6ce47e9363cfa1950c86f0994552f35c3018680844cf3dc68bc3782654089f08955164c49331ad

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\BlueMan Loader.exe.log

Filesize
654B

MD5
16c5fce5f7230eea11598ec11ed42862

SHA1
75392d4824706090f5e8907eee1059349c927600

SHA256
87ba77c13905298acbac72be90949c4fe0755b6eff9777615aa37f252515f151

SHA512
153edd6da59beea6cc411ed7383c32916425d6ebb65f04c65aab7c1d6b25443d143aa8449aa92149de0ad8a975f6ecaa60f9f7574536eec6b38fe5fd3a6c6adc

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
3KB

MD5
8592ba100a78835a6b94d5949e13dfc1

SHA1
63e901200ab9a57c7dd4c078d7f75dcd3b357020

SHA256
fdd7d9def6f9f0c0f2e60dbc8a2d1999071cd7d3095e9e087bb1cda7a614ac3c

SHA512
87f98e6cb61b2a2a7d65710c4d33881d89715eb7a06e00d492259f35c3902498baabffc5886be0ec5a14312ad4c262e3fc40cd3a5cb91701af0fb229726b88c3

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

Filesize
1KB

MD5
a9074e081268bfe5ccc8160f6aa40759

SHA1
d65071376505f602bf2d7478f44d392cdbb33dd4

SHA256
e944ed48f06630da92bc073300ed9f1a8cffe41a9614bb01eff506dcd18940a0

SHA512
96b840bf456c78192b420b8a6f91b84855068051ce652f74de851d587463035fafc2f2e20ce07b77e51618d79b08e391c6684953aa9e64667d954d9fd187b737

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

Filesize
1KB

MD5
a953721d088e3d07456fdfca2220f99c

SHA1
5b12aded20d8ab611f9e8fa25d458f9ef0f91a72

SHA256
7dcf742206203a1a98cc04e546ae8482a43e6c1a449e34fb1f5a97b414af66e4

SHA512
77564f706ffda97a399c1c06b12774385f2f4a64c74037069c6d2549dc5bf127b5f70bfaefb30b0e76a9aae360131b4203e2fd2de2a8b6ff89cc420b63a3fb18

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_cg1y5yrj.roc.ps1

Filesize
1B

MD5
c4ca4238a0b923820dcc509a6f75849b

SHA1
356a192b7913b04c54574d18c28d46e6395428ab

SHA256
6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b

SHA512
4dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a

Download Submit
memory/1468-10-0x00007FFD5EBC0000-0x00007FFD5F5AC000-memory.dmp

Filesize
9.9MB

Download
memory/1468-13-0x00000231AE250000-0x00000231AE2C6000-memory.dmp

Filesize
472KB

Download
memory/1468-51-0x00007FFD5EBC0000-0x00007FFD5F5AC000-memory.dmp

Filesize
9.9MB

Download
memory/1468-9-0x00007FFD5EBC0000-0x00007FFD5F5AC000-memory.dmp

Filesize
9.9MB

Download
memory/1468-8-0x0000023195BA0000-0x0000023195BC2000-memory.dmp

Filesize
136KB

Download
memory/1468-7-0x00007FFD5EBC0000-0x00007FFD5F5AC000-memory.dmp

Filesize
9.9MB

Download
memory/2820-0-0x00007FFD5EBC3000-0x00007FFD5EBC4000-memory.dmp

Filesize
4KB

Download
memory/2820-2-0x00007FFD5EBC0000-0x00007FFD5F5AC000-memory.dmp

Filesize
9.9MB

Download
memory/2820-149-0x00007FFD5EBC3000-0x00007FFD5EBC4000-memory.dmp

Filesize
4KB

Download
memory/2820-151-0x00007FFD5EBC0000-0x00007FFD5F5AC000-memory.dmp

Filesize
9.9MB

Download
memory/2820-152-0x0000000002D70000-0x0000000002D7A000-memory.dmp

Filesize
40KB

Download
memory/2820-1-0x00000000008B0000-0x00000000008CC000-memory.dmp

Filesize
112KB

Download