xworm | ba599c53479ad87732d7d5dab8a4cca44bb55cbc134e6054ddb6414e9cfd1508

General

Target

X.exe
Size

63KB
MD5

f16a3a537f873f3e7bd334d6cf93c525
SHA1

4fbedba1adbeda56019534b1bf74ff47ed814e61
SHA256

ba599c53479ad87732d7d5dab8a4cca44bb55cbc134e6054ddb6414e9cfd1508
SHA512

032ec3782acaa2d21b24b8aae659e2bede424e594fee00aafbcf66840a8fd048fceae7ef2a8ad449a38590041d241c7edd1c219e9b5ffb3b5e8993a01ba4011a
SSDEEP

1536:zDJ1KwwGadRqckbTz0hdOWwdx6mf6ZOTLGuJi:p14GURjkbTnWvOTJJi

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:7787

92.43.187.26:7787

Attributes

Install_directory
%Temp%
install_file
St.exe

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/2088-1-0x00000000001B0000-0x00000000001C6000-memory.dmp	family_xworm
behavioral1/files/0x000b000000012118-34.dat	family_xworm
behavioral1/memory/1612-36-0x00000000002B0000-0x00000000002C6000-memory.dmp	family_xworm
behavioral1/memory/576-40-0x0000000000030000-0x0000000000046000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat 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
2756	powershell.exe
2332	powershell.exe
2960	powershell.exe
2872	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
1612	St.exe
576	St.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-1-5-21-1506706701-1246725540-2219210854-1000\Software\Microsoft\Windows\CurrentVersion\Run\St = "C:\\Users\\Admin\\AppData\\Local\\Temp\\St.exe"	X.exe

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
1712	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2332	powershell.exe
2960	powershell.exe
2872	powershell.exe
2756	powershell.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2088	X.exe
Token: SeDebugPrivilege	2332	powershell.exe
Token: SeDebugPrivilege	2960	powershell.exe
Token: SeDebugPrivilege	2872	powershell.exe
Token: SeDebugPrivilege	2756	powershell.exe
Token: SeDebugPrivilege	2088	X.exe
Token: SeDebugPrivilege	1612	St.exe
Token: SeDebugPrivilege	576	St.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2088 wrote to memory of 2332	2088	X.exe	30
PID 2088 wrote to memory of 2332	2088	X.exe	30
PID 2088 wrote to memory of 2332	2088	X.exe	30
PID 2088 wrote to memory of 2960	2088	X.exe	32
PID 2088 wrote to memory of 2960	2088	X.exe	32
PID 2088 wrote to memory of 2960	2088	X.exe	32
PID 2088 wrote to memory of 2872	2088	X.exe	34
PID 2088 wrote to memory of 2872	2088	X.exe	34
PID 2088 wrote to memory of 2872	2088	X.exe	34
PID 2088 wrote to memory of 2756	2088	X.exe	36
PID 2088 wrote to memory of 2756	2088	X.exe	36
PID 2088 wrote to memory of 2756	2088	X.exe	36
PID 2088 wrote to memory of 1712	2088	X.exe	38
PID 2088 wrote to memory of 1712	2088	X.exe	38
PID 2088 wrote to memory of 1712	2088	X.exe	38
PID 592 wrote to memory of 1612	592	taskeng.exe	42
PID 592 wrote to memory of 1612	592	taskeng.exe	42
PID 592 wrote to memory of 1612	592	taskeng.exe	42
PID 592 wrote to memory of 576	592	taskeng.exe	43
PID 592 wrote to memory of 576	592	taskeng.exe	43
PID 592 wrote to memory of 576	592	taskeng.exe	43

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\X.exe
"C:\Users\Admin\AppData\Local\Temp\X.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2088
- 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\X.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2332
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'X.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2960
- 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\St.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2872
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'St.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2756
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "St" /tr "C:\Users\Admin\AppData\Local\Temp\St.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1712

C:\Windows\system32\taskeng.exe
taskeng.exe {E318817D-078E-488B-80C3-622CAA948409} S-1-5-21-1506706701-1246725540-2219210854-1000:MUYDDIIS\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:592
- C:\Users\Admin\AppData\Local\Temp\St.exe
  C:\Users\Admin\AppData\Local\Temp\St.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1612
- C:\Users\Admin\AppData\Local\Temp\St.exe
  C:\Users\Admin\AppData\Local\Temp\St.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:576

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\Local\Temp\St.exe

Filesize
63KB

MD5
f16a3a537f873f3e7bd334d6cf93c525

SHA1
4fbedba1adbeda56019534b1bf74ff47ed814e61

SHA256
ba599c53479ad87732d7d5dab8a4cca44bb55cbc134e6054ddb6414e9cfd1508

SHA512
032ec3782acaa2d21b24b8aae659e2bede424e594fee00aafbcf66840a8fd048fceae7ef2a8ad449a38590041d241c7edd1c219e9b5ffb3b5e8993a01ba4011a

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

Filesize
7KB

MD5
2583fbb3f06194b82fdb73e436b1dc9e

SHA1
a8a573967031c455dd785d46da78d4eb974eebd7

SHA256
4a9aaf9c3a8f508477d233022cad57af2c748a66a6581bead00a4452821204cc

SHA512
e55321ca62de5f0cc3ac41cc7f15dccbed53f0815e48f8857ac513c42a5865e8a3b320a77a43ce5d3e9673ffbf32f2aecbfb9534ed6ce892292c1fc724c1e563

Download Submit
memory/576-40-0x0000000000030000-0x0000000000046000-memory.dmp

Filesize
88KB

Download
memory/1612-36-0x00000000002B0000-0x00000000002C6000-memory.dmp

Filesize
88KB

Download
memory/2088-32-0x000000001B150000-0x000000001B1D0000-memory.dmp

Filesize
512KB

Download
memory/2088-1-0x00000000001B0000-0x00000000001C6000-memory.dmp

Filesize
88KB

Download
memory/2088-0-0x000007FEF60D3000-0x000007FEF60D4000-memory.dmp

Filesize
4KB

Download
memory/2088-38-0x0000000002040000-0x000000000204C000-memory.dmp

Filesize
48KB

Download
memory/2088-30-0x000000001B150000-0x000000001B1D0000-memory.dmp

Filesize
512KB

Download
memory/2088-31-0x000007FEF60D3000-0x000007FEF60D4000-memory.dmp

Filesize
4KB

Download
memory/2332-7-0x000000001B530000-0x000000001B812000-memory.dmp

Filesize
2.9MB

Download
memory/2332-8-0x0000000002240000-0x0000000002248000-memory.dmp

Filesize
32KB

Download
memory/2332-6-0x0000000002B40000-0x0000000002BC0000-memory.dmp

Filesize
512KB

Download
memory/2960-15-0x0000000002710000-0x0000000002718000-memory.dmp

Filesize
32KB

Download
memory/2960-14-0x000000001B570000-0x000000001B852000-memory.dmp

Filesize
2.9MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads