xworm | ea6a26539f74891663a03fc3cf348ef53c14295ef3662b9a29b211a8d0503e1c

General

Target

svchost.scr
Size

79KB
MD5

0b192c8ec04f4dcd360957eb478221d2
SHA1

522a5c7336a31c23efec4b8ccab7ce7c17d620d4
SHA256

ea6a26539f74891663a03fc3cf348ef53c14295ef3662b9a29b211a8d0503e1c
SHA512

7d5dd7c9aca799a8dc15eea9bf767ca6c7e2145ad848d2b2cefb3548cffb30bbbb3e3933aac7c602e4a1b5f02e14e46b7edbcc3945e1aa2e3cc6219941e90eb6
SSDEEP

1536:bN9+rzFV4eo/7Bd53gXby6WVhodFa/6BAMOgepesq:bNneo/1fqbyd+iQAMOg5sq

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

IDKTOBEHONESTNIGAS-56344.portmap.io:56344

Attributes

Install_directory
%LocalAppData%

Signatures

Detect Xworm Payload 5 IoCs

resource	yara_rule
behavioral1/memory/1996-1-0x0000000000360000-0x000000000037A000-memory.dmp	family_xworm
behavioral1/files/0x00150000000054a9-32.dat	family_xworm
behavioral1/memory/1408-34-0x0000000000D20000-0x0000000000D3A000-memory.dmp	family_xworm
behavioral1/memory/916-37-0x00000000002D0000-0x00000000002EA000-memory.dmp	family_xworm
behavioral1/memory/1656-39-0x0000000000120000-0x000000000013A000-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 3 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2792	powershell.exe
2808	powershell.exe
2844	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
1408	svchost.scr
916	svchost.scr
1656	svchost.scr

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-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Local\\svchost.scr"	svchost.scr

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

Modifies system certificate store 2 TTPs 2 IoCs

defense_evasion spyware trojan

Install Root Certificate

T1553.004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8	svchost.scr
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8\Blob = 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	svchost.scr

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
3032	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2792	powershell.exe
2808	powershell.exe
2844	powershell.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	1996	svchost.scr
Token: SeDebugPrivilege	2792	powershell.exe
Token: SeDebugPrivilege	2808	powershell.exe
Token: SeDebugPrivilege	2844	powershell.exe
Token: SeDebugPrivilege	1996	svchost.scr
Token: SeDebugPrivilege	1408	svchost.scr
Token: SeDebugPrivilege	916	svchost.scr
Token: SeDebugPrivilege	1656	svchost.scr

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1996 wrote to memory of 2792	1996	svchost.scr	32
PID 1996 wrote to memory of 2792	1996	svchost.scr	32
PID 1996 wrote to memory of 2792	1996	svchost.scr	32
PID 1996 wrote to memory of 2808	1996	svchost.scr	34
PID 1996 wrote to memory of 2808	1996	svchost.scr	34
PID 1996 wrote to memory of 2808	1996	svchost.scr	34
PID 1996 wrote to memory of 2844	1996	svchost.scr	36
PID 1996 wrote to memory of 2844	1996	svchost.scr	36
PID 1996 wrote to memory of 2844	1996	svchost.scr	36
PID 1996 wrote to memory of 3032	1996	svchost.scr	38
PID 1996 wrote to memory of 3032	1996	svchost.scr	38
PID 1996 wrote to memory of 3032	1996	svchost.scr	38
PID 2732 wrote to memory of 1408	2732	taskeng.exe	41
PID 2732 wrote to memory of 1408	2732	taskeng.exe	41
PID 2732 wrote to memory of 1408	2732	taskeng.exe	41
PID 2732 wrote to memory of 916	2732	taskeng.exe	42
PID 2732 wrote to memory of 916	2732	taskeng.exe	42
PID 2732 wrote to memory of 916	2732	taskeng.exe	42
PID 2732 wrote to memory of 1656	2732	taskeng.exe	44
PID 2732 wrote to memory of 1656	2732	taskeng.exe	44
PID 2732 wrote to memory of 1656	2732	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\svchost.scr
"C:\Users\Admin\AppData\Local\Temp\svchost.scr" /S
1⤵
- Drops startup file
- Adds Run key to start application
- Modifies system certificate store
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1996
- 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.scr'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2792
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.scr'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2808
- 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\svchost.scr'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2844
- 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\svchost.scr"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3032

C:\Windows\system32\taskeng.exe
taskeng.exe {18E37F53-49D1-4165-9CEF-7111E4B0B8AA} S-1-5-21-2872745919-2748461613-2989606286-1000:CCJBVTGQ\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2732
- C:\Users\Admin\AppData\Local\svchost.scr
  C:\Users\Admin\AppData\Local\svchost.scr "C:\Users\Admin\AppData\Local\svchost.scr"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1408
- C:\Users\Admin\AppData\Local\svchost.scr
  C:\Users\Admin\AppData\Local\svchost.scr "C:\Users\Admin\AppData\Local\svchost.scr"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:916
- C:\Users\Admin\AppData\Local\svchost.scr
  C:\Users\Admin\AppData\Local\svchost.scr "C:\Users\Admin\AppData\Local\svchost.scr"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1656

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

2

T1112

Subvert Trust Controls

1

T1553

Install Root Certificate

1

T1553.004

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\Local\svchost.scr

Filesize
79KB

MD5
0b192c8ec04f4dcd360957eb478221d2

SHA1
522a5c7336a31c23efec4b8ccab7ce7c17d620d4

SHA256
ea6a26539f74891663a03fc3cf348ef53c14295ef3662b9a29b211a8d0503e1c

SHA512
7d5dd7c9aca799a8dc15eea9bf767ca6c7e2145ad848d2b2cefb3548cffb30bbbb3e3933aac7c602e4a1b5f02e14e46b7edbcc3945e1aa2e3cc6219941e90eb6

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

Filesize
7KB

MD5
f5eaa1e429bde9dda7c9eea5dc917d1a

SHA1
96822205708b3fc50c898721d35caeca5813bdca

SHA256
09481339ec68bf5a728d2a4064076c6e547355b7f7d49020840523528faa7708

SHA512
c94cc9bc9d61a16626c3afc76edb19ebd4ad29bc7cfc3c6a6afed558b0f1eeb69bf0fc5b418b1a6c862ee0af0cc7a07d5d46fdb3f66a8129e9eeeebfe27b05c6

Download Submit
memory/916-37-0x00000000002D0000-0x00000000002EA000-memory.dmp

Filesize
104KB

Download
memory/1408-34-0x0000000000D20000-0x0000000000D3A000-memory.dmp

Filesize
104KB

Download
memory/1656-39-0x0000000000120000-0x000000000013A000-memory.dmp

Filesize
104KB

Download
memory/1996-25-0x000007FEF6030000-0x000007FEF6A1C000-memory.dmp

Filesize
9.9MB

Download
memory/1996-1-0x0000000000360000-0x000000000037A000-memory.dmp

Filesize
104KB

Download
memory/1996-2-0x000007FEF6030000-0x000007FEF6A1C000-memory.dmp

Filesize
9.9MB

Download
memory/1996-7-0x000007FEF6033000-0x000007FEF6034000-memory.dmp

Filesize
4KB

Download
memory/1996-0-0x000007FEF6033000-0x000007FEF6034000-memory.dmp

Filesize
4KB

Download
memory/2792-10-0x0000000002290000-0x0000000002298000-memory.dmp

Filesize
32KB

Download
memory/2792-9-0x000000001B7B0000-0x000000001BA92000-memory.dmp

Filesize
2.9MB

Download
memory/2792-8-0x0000000002D90000-0x0000000002E10000-memory.dmp

Filesize
512KB

Download
memory/2808-17-0x0000000001D90000-0x0000000001D98000-memory.dmp

Filesize
32KB

Download
memory/2808-16-0x000000001B660000-0x000000001B942000-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