xworm | 96d7f2474c300d7f24cd2635f03d52fe40964a030787d9e84dd1fedbb5618691

General

Target

555.exe
Size

73KB
MD5

a419ffb32ad6422938129688d39a898f
SHA1

303695e2f43566685c568ca670133b0d717eabcf
SHA256

96d7f2474c300d7f24cd2635f03d52fe40964a030787d9e84dd1fedbb5618691
SHA512

6a145de4ee6d26b1ee8be5cc22f7888291b8544ea8323f425da8ecfafdf79d961164ddd3c3eaf5a5d7abaa6208e5539c2ea8d2685440e81c6eea2248f8552e9f
SSDEEP

1536:v2oktWbR7i2wiOXObYzDVSUbLUSsr36xOwGZtadQAa:v2ocs7iaOebHUbLGcOwGCdfa

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

house-jungle.gl.at.ply.gg:14868

Attributes

Install_directory
%Userprofile%
install_file
USB.exe

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/memory/2020-1-0x00000000013C0000-0x00000000013D8000-memory.dmp	family_xworm
behavioral1/files/0x000b0000000165a7-34.dat	family_xworm
behavioral1/memory/2904-36-0x0000000000E30000-0x0000000000E48000-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
2624	powershell.exe
2628	powershell.exe
2736	powershell.exe
2944	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Bar2lecb.lnk	555.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Bar2lecb.lnk	555.exe

Executes dropped EXE 2 IoCs

pid	Process
2904	Bar2lecb
3064	Bar2lecb

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-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Windows\CurrentVersion\Run\Bar2lecb = "C:\\Users\\Admin\\Bar2lecb"	555.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
2884	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2736	powershell.exe
2944	powershell.exe
2624	powershell.exe
2628	powershell.exe
2020	555.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2020	555.exe
Token: SeDebugPrivilege	2736	powershell.exe
Token: SeDebugPrivilege	2944	powershell.exe
Token: SeDebugPrivilege	2624	powershell.exe
Token: SeDebugPrivilege	2628	powershell.exe
Token: SeDebugPrivilege	2020	555.exe
Token: SeDebugPrivilege	2904	Bar2lecb
Token: SeDebugPrivilege	3064	Bar2lecb

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2020	555.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2020 wrote to memory of 2736	2020	555.exe	32
PID 2020 wrote to memory of 2736	2020	555.exe	32
PID 2020 wrote to memory of 2736	2020	555.exe	32
PID 2020 wrote to memory of 2944	2020	555.exe	34
PID 2020 wrote to memory of 2944	2020	555.exe	34
PID 2020 wrote to memory of 2944	2020	555.exe	34
PID 2020 wrote to memory of 2624	2020	555.exe	36
PID 2020 wrote to memory of 2624	2020	555.exe	36
PID 2020 wrote to memory of 2624	2020	555.exe	36
PID 2020 wrote to memory of 2628	2020	555.exe	38
PID 2020 wrote to memory of 2628	2020	555.exe	38
PID 2020 wrote to memory of 2628	2020	555.exe	38
PID 2020 wrote to memory of 2884	2020	555.exe	40
PID 2020 wrote to memory of 2884	2020	555.exe	40
PID 2020 wrote to memory of 2884	2020	555.exe	40
PID 1700 wrote to memory of 2904	1700	taskeng.exe	43
PID 1700 wrote to memory of 2904	1700	taskeng.exe	43
PID 1700 wrote to memory of 2904	1700	taskeng.exe	43
PID 1700 wrote to memory of 3064	1700	taskeng.exe	44
PID 1700 wrote to memory of 3064	1700	taskeng.exe	44
PID 1700 wrote to memory of 3064	1700	taskeng.exe	44

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\555.exe
"C:\Users\Admin\AppData\Local\Temp\555.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:2020
- 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\555.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2736
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '555.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2944
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\Bar2lecb'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2624
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Bar2lecb'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2628
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Bar2lecb" /tr "C:\Users\Admin\Bar2lecb"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2884

C:\Windows\system32\taskeng.exe
taskeng.exe {0A266B81-0407-41FB-ABB9-5D436DD99A85} S-1-5-21-4177215427-74451935-3209572229-1000:JSMURNPT\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1700
- C:\Users\Admin\Bar2lecb
  C:\Users\Admin\Bar2lecb
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2904
- C:\Users\Admin\Bar2lecb
  C:\Users\Admin\Bar2lecb
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:3064

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

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
679acbf6baad6531f002b2d20fda5239

SHA1
3e111ddb61b2c3c8770a84901507a111db00a77a

SHA256
2538bb7b014be2be6bf922f4e52e794dfaaeeccd9bc4b887863760dae0640375

SHA512
5c6dc5e47a2dcff8710aa016d726c80634fb7041d59e18dc69ea7d273e4c532053698f8a420a5a53088b4b52af3795121810d7d29322f5462f47cb730e002070

Download Submit
C:\Users\Admin\Bar2lecb

Filesize
73KB

MD5
a419ffb32ad6422938129688d39a898f

SHA1
303695e2f43566685c568ca670133b0d717eabcf

SHA256
96d7f2474c300d7f24cd2635f03d52fe40964a030787d9e84dd1fedbb5618691

SHA512
6a145de4ee6d26b1ee8be5cc22f7888291b8544ea8323f425da8ecfafdf79d961164ddd3c3eaf5a5d7abaa6208e5539c2ea8d2685440e81c6eea2248f8552e9f

Download Submit
memory/2020-2-0x000007FEF55B0000-0x000007FEF5F9C000-memory.dmp

Filesize
9.9MB

Download
memory/2020-0-0x000007FEF55B3000-0x000007FEF55B4000-memory.dmp

Filesize
4KB

Download
memory/2020-28-0x000007FEF55B3000-0x000007FEF55B4000-memory.dmp

Filesize
4KB

Download
memory/2020-32-0x000007FEF55B0000-0x000007FEF5F9C000-memory.dmp

Filesize
9.9MB

Download
memory/2020-1-0x00000000013C0000-0x00000000013D8000-memory.dmp

Filesize
96KB

Download
memory/2736-7-0x0000000002D60000-0x0000000002DE0000-memory.dmp

Filesize
512KB

Download
memory/2736-8-0x000000001B710000-0x000000001B9F2000-memory.dmp

Filesize
2.9MB

Download
memory/2736-9-0x0000000002690000-0x0000000002698000-memory.dmp

Filesize
32KB

Download
memory/2904-36-0x0000000000E30000-0x0000000000E48000-memory.dmp

Filesize
96KB

Download
memory/2944-15-0x000000001B630000-0x000000001B912000-memory.dmp

Filesize
2.9MB

Download
memory/2944-16-0x00000000023C0000-0x00000000023C8000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads