xworm | 435011ebed0c301de1847935c54d9b80a4c279e380413d207febd895e8164e3f

General

Target

injector-helper.exe
Size

184KB
MD5

c777067925c4275efccd6e31750b2a4d
SHA1

52259a1bf97340490e0208145bb8c666e07c31f9
SHA256

435011ebed0c301de1847935c54d9b80a4c279e380413d207febd895e8164e3f
SHA512

0ad92779cc0073089d8c7c252eab1ff5e8ddafab9aa6a0391c41625a40a6ca46dd228bd3a36e0aaa399bd89b22e7fb09bc6bcb2f27c7e5f89b75a5798b22ce85
SSDEEP

3072:P567FmwoIb5iz+bIOVMQMGxO1VjBz65/M6If+3Js+3JFkKeTno:P5im6iKbYjxBt25

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%Temp%
install_file
svchost.exe
pastebin_url
https://pastebin.com/raw/kADeGNZE

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/2096-1-0x0000000000F40000-0x0000000000F74000-memory.dmp	family_xworm
behavioral1/memory/2040-36-0x00000000000F0000-0x0000000000124000-memory.dmp	family_xworm
behavioral1/files/0x000d000000012281-35.dat	family_xworm
behavioral1/memory/1476-40-0x0000000000EE0000-0x0000000000F14000-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
2488	powershell.exe
2700	powershell.exe
2968	powershell.exe
1136	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
2040	svchost.exe
1476	svchost.exe
2408	svchost.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-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Local\\Temp\\svchost.exe"	injector-helper.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
4	pastebin.com
5	pastebin.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
2632	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2488	powershell.exe
2700	powershell.exe
2968	powershell.exe
1136	powershell.exe
2096	injector-helper.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	2096	injector-helper.exe
Token: SeDebugPrivilege	2488	powershell.exe
Token: SeDebugPrivilege	2700	powershell.exe
Token: SeDebugPrivilege	2968	powershell.exe
Token: SeDebugPrivilege	1136	powershell.exe
Token: SeDebugPrivilege	2096	injector-helper.exe
Token: SeDebugPrivilege	2040	svchost.exe
Token: SeDebugPrivilege	1476	svchost.exe
Token: SeDebugPrivilege	2408	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2096	injector-helper.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2096 wrote to memory of 2488	2096	injector-helper.exe	31
PID 2096 wrote to memory of 2488	2096	injector-helper.exe	31
PID 2096 wrote to memory of 2488	2096	injector-helper.exe	31
PID 2096 wrote to memory of 2700	2096	injector-helper.exe	33
PID 2096 wrote to memory of 2700	2096	injector-helper.exe	33
PID 2096 wrote to memory of 2700	2096	injector-helper.exe	33
PID 2096 wrote to memory of 2968	2096	injector-helper.exe	35
PID 2096 wrote to memory of 2968	2096	injector-helper.exe	35
PID 2096 wrote to memory of 2968	2096	injector-helper.exe	35
PID 2096 wrote to memory of 1136	2096	injector-helper.exe	37
PID 2096 wrote to memory of 1136	2096	injector-helper.exe	37
PID 2096 wrote to memory of 1136	2096	injector-helper.exe	37
PID 2096 wrote to memory of 2632	2096	injector-helper.exe	39
PID 2096 wrote to memory of 2632	2096	injector-helper.exe	39
PID 2096 wrote to memory of 2632	2096	injector-helper.exe	39
PID 2864 wrote to memory of 2040	2864	taskeng.exe	42
PID 2864 wrote to memory of 2040	2864	taskeng.exe	42
PID 2864 wrote to memory of 2040	2864	taskeng.exe	42
PID 2864 wrote to memory of 1476	2864	taskeng.exe	44
PID 2864 wrote to memory of 1476	2864	taskeng.exe	44
PID 2864 wrote to memory of 1476	2864	taskeng.exe	44
PID 2864 wrote to memory of 2408	2864	taskeng.exe	46
PID 2864 wrote to memory of 2408	2864	taskeng.exe	46
PID 2864 wrote to memory of 2408	2864	taskeng.exe	46

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\injector-helper.exe
"C:\Users\Admin\AppData\Local\Temp\injector-helper.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:2096
- 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\injector-helper.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2488
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'injector-helper.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2700
- 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\svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2968
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1136
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Admin\AppData\Local\Temp\svchost.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2632

C:\Windows\system32\taskeng.exe
taskeng.exe {39988B6A-CC8D-46FF-9808-075380033844} S-1-5-21-4177215427-74451935-3209572229-1000:JSMURNPT\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2864
- C:\Users\Admin\AppData\Local\Temp\svchost.exe
  C:\Users\Admin\AppData\Local\Temp\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2040
- C:\Users\Admin\AppData\Local\Temp\svchost.exe
  C:\Users\Admin\AppData\Local\Temp\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1476
- C:\Users\Admin\AppData\Local\Temp\svchost.exe
  C:\Users\Admin\AppData\Local\Temp\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2408

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

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\svchost.exe

Filesize
184KB

MD5
c777067925c4275efccd6e31750b2a4d

SHA1
52259a1bf97340490e0208145bb8c666e07c31f9

SHA256
435011ebed0c301de1847935c54d9b80a4c279e380413d207febd895e8164e3f

SHA512
0ad92779cc0073089d8c7c252eab1ff5e8ddafab9aa6a0391c41625a40a6ca46dd228bd3a36e0aaa399bd89b22e7fb09bc6bcb2f27c7e5f89b75a5798b22ce85

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\UZS5M1WJGDWEJ1OPD12O.temp

Filesize
7KB

MD5
b9a71158b56e8d651724bf7beaf9161f

SHA1
49e3107fed3ea119b0613526d32bc4ba443800bb

SHA256
dc40a571c8311612e7ad82b49dfdcd55eecd1d3f143426b5da370b9f0c6f0979

SHA512
f01a484f9606c59177d90ec2424786c973fbf16146d6cfa77550109f8925295e2b6547db6f487841c62989d4d93b932dc57dbc5924621d9b64e5458d6428fa8d

Download Submit
memory/1476-40-0x0000000000EE0000-0x0000000000F14000-memory.dmp

Filesize
208KB

Download
memory/2040-36-0x00000000000F0000-0x0000000000124000-memory.dmp

Filesize
208KB

Download
memory/2096-32-0x000007FEF53E3000-0x000007FEF53E4000-memory.dmp

Filesize
4KB

Download
memory/2096-1-0x0000000000F40000-0x0000000000F74000-memory.dmp

Filesize
208KB

Download
memory/2096-0-0x000007FEF53E3000-0x000007FEF53E4000-memory.dmp

Filesize
4KB

Download
memory/2096-37-0x000000001AB80000-0x000000001AC00000-memory.dmp

Filesize
512KB

Download
memory/2096-31-0x000000001AB80000-0x000000001AC00000-memory.dmp

Filesize
512KB

Download
memory/2488-8-0x0000000001EF0000-0x0000000001EF8000-memory.dmp

Filesize
32KB

Download
memory/2488-7-0x000000001B690000-0x000000001B972000-memory.dmp

Filesize
2.9MB

Download
memory/2488-6-0x0000000002950000-0x00000000029D0000-memory.dmp

Filesize
512KB

Download
memory/2700-15-0x0000000002790000-0x0000000002798000-memory.dmp

Filesize
32KB

Download
memory/2700-14-0x000000001B5F0000-0x000000001B8D2000-memory.dmp

Filesize
2.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads