xworm | 1bf622f63d06acd305b37aefb205cf4f54fc333e1a448dddd1212d33ab6de7e1

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

C2

uk2.localto.net:1172

Attributes

Install_directory
%ProgramData%
install_file
USB.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/1700-0-0x0000000000620000-0x000000000063C000-memory.dmp	family_xworm
behavioral2/files/0x000a000000023389-48.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
4256	powershell.exe
1296	powershell.exe
3780	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	BlueMan Loader.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
1164	BlueMan Loader.exe
4580	BlueMan Loader.exe
1540	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-1-5-21-4124900551-4068476067-3491212533-1000\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
21	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
1320	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1700	BlueMan Loader.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
4256	powershell.exe
4256	powershell.exe
1296	powershell.exe
1296	powershell.exe
3780	powershell.exe
3780	powershell.exe
1700	BlueMan Loader.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	1700	BlueMan Loader.exe
Token: SeDebugPrivilege	4256	powershell.exe
Token: SeDebugPrivilege	1296	powershell.exe
Token: SeDebugPrivilege	3780	powershell.exe
Token: SeDebugPrivilege	1700	BlueMan Loader.exe
Token: SeDebugPrivilege	1164	BlueMan Loader.exe
Token: SeDebugPrivilege	4580	BlueMan Loader.exe
Token: SeDebugPrivilege	1540	BlueMan Loader.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1700	BlueMan Loader.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1700 wrote to memory of 4256	1700	BlueMan Loader.exe	93
PID 1700 wrote to memory of 4256	1700	BlueMan Loader.exe	93
PID 1700 wrote to memory of 1296	1700	BlueMan Loader.exe	95
PID 1700 wrote to memory of 1296	1700	BlueMan Loader.exe	95
PID 1700 wrote to memory of 3780	1700	BlueMan Loader.exe	98
PID 1700 wrote to memory of 3780	1700	BlueMan Loader.exe	98
PID 1700 wrote to memory of 1320	1700	BlueMan Loader.exe	100
PID 1700 wrote to memory of 1320	1700	BlueMan Loader.exe	100

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⤵
- Checks computer location settings
- 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:1700
- 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:4256
- 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:1296
- 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:3780
- 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:1320

C:\ProgramData\BlueMan Loader.exe
"C:\ProgramData\BlueMan Loader.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1164

C:\ProgramData\BlueMan Loader.exe
"C:\ProgramData\BlueMan Loader.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4580

C:\ProgramData\BlueMan Loader.exe
"C:\ProgramData\BlueMan Loader.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1540

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

2

T1012

System Information Discovery

2

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
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
944B

MD5
2e907f77659a6601fcc408274894da2e

SHA1
9f5b72abef1cd7145bf37547cdb1b9254b4efe9d

SHA256
385da35673330e21ac02545220552fe301fe54dedefbdafc097ac4342a295233

SHA512
34fa0fff24f6550f55f828541aaefe5d75c86f8f0842d54b50065e9746f9662bb7209c74c9a9571540b9855bb3851f01db613190024e89b198d485bb5dc07721

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

Filesize
944B

MD5
5cfe303e798d1cc6c1dab341e7265c15

SHA1
cd2834e05191a24e28a100f3f8114d5a7708dc7c

SHA256
c4d16552769ca1762f6867bce85589c645ac3dc490b650083d74f853f898cfab

SHA512
ef151bbe0033a2caf2d40aff74855a3f42c8171e05a11c8ce93c7039d9430482c43fe93d9164ee94839aff253cad774dbf619dde9a8af38773ca66d59ac3400e

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_cgxdkzpq.nr3.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1700-0-0x0000000000620000-0x000000000063C000-memory.dmp

Filesize
112KB

Download
memory/1700-2-0x00007FFFBA450000-0x00007FFFBAF11000-memory.dmp

Filesize
10.8MB

Download
memory/1700-1-0x00007FFFBA453000-0x00007FFFBA455000-memory.dmp

Filesize
8KB

Download
memory/1700-54-0x00007FFFBA450000-0x00007FFFBAF11000-memory.dmp

Filesize
10.8MB

Download
memory/1700-52-0x00007FFFBA453000-0x00007FFFBA455000-memory.dmp

Filesize
8KB

Download
memory/4256-13-0x00007FFFBA450000-0x00007FFFBAF11000-memory.dmp

Filesize
10.8MB

Download
memory/4256-18-0x00007FFFBA450000-0x00007FFFBAF11000-memory.dmp

Filesize
10.8MB

Download
memory/4256-15-0x00007FFFBA450000-0x00007FFFBAF11000-memory.dmp

Filesize
10.8MB

Download
memory/4256-14-0x00007FFFBA450000-0x00007FFFBAF11000-memory.dmp

Filesize
10.8MB

Download
memory/4256-8-0x00000253F1F50000-0x00000253F1F72000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads