xworm | d6684b27eb3b9913fd9742bf3ce9c38e5f089211b0c105893e44eeaf79f691a2

General

Target

webhack.exe
Size

80KB
MD5

bee4a56d9ba0426d3c95dde1970f6429
SHA1

2bfa99521d4a4f2ed6f9b457074ecf1fae7cd712
SHA256

d6684b27eb3b9913fd9742bf3ce9c38e5f089211b0c105893e44eeaf79f691a2
SHA512

294855ac413dec844467c23ddef1dd87334d0f83f5053a6e9e0b66f032d48e748351f4fa95e166d33c4385c4734d4f4af27365d3379d480a5b5a8ecb30e5f660
SSDEEP

1536:NF423Du5xn5JrsFkAZb1SfMP0I6naOwi0Wasei/mH:NF42zux5WFkAZb14xaObRoH

Score

10^/10

Malware Config

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/memory/2072-1-0x00000000012E0000-0x00000000012FA000-memory.dmp	family_xworm
behavioral1/files/0x0009000000015fba-28.dat	family_xworm
behavioral1/memory/1244-36-0x0000000001250000-0x000000000126A000-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
2524	powershell.exe
2884	powershell.exe
2820	powershell.exe

Deletes itself 1 IoCs

pid	Process
1632	cmd.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
1244	webhack.exe
1608	webhack.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-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\webhack = "C:\\Users\\Admin\\AppData\\Local\\webhack.exe"	webhack.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
1520	timeout.exe

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
2772	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2524	powershell.exe
2884	powershell.exe
2820	powershell.exe
2072	webhack.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	2072	webhack.exe
Token: SeDebugPrivilege	2524	powershell.exe
Token: SeDebugPrivilege	2884	powershell.exe
Token: SeDebugPrivilege	2820	powershell.exe
Token: SeDebugPrivilege	2072	webhack.exe
Token: SeDebugPrivilege	1244	webhack.exe
Token: SeDebugPrivilege	1608	webhack.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2072	webhack.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2072 wrote to memory of 2524	2072	webhack.exe	30
PID 2072 wrote to memory of 2524	2072	webhack.exe	30
PID 2072 wrote to memory of 2524	2072	webhack.exe	30
PID 2072 wrote to memory of 2884	2072	webhack.exe	32
PID 2072 wrote to memory of 2884	2072	webhack.exe	32
PID 2072 wrote to memory of 2884	2072	webhack.exe	32
PID 2072 wrote to memory of 2820	2072	webhack.exe	34
PID 2072 wrote to memory of 2820	2072	webhack.exe	34
PID 2072 wrote to memory of 2820	2072	webhack.exe	34
PID 2072 wrote to memory of 2772	2072	webhack.exe	36
PID 2072 wrote to memory of 2772	2072	webhack.exe	36
PID 2072 wrote to memory of 2772	2072	webhack.exe	36
PID 1484 wrote to memory of 1244	1484	taskeng.exe	41
PID 1484 wrote to memory of 1244	1484	taskeng.exe	41
PID 1484 wrote to memory of 1244	1484	taskeng.exe	41
PID 1484 wrote to memory of 1608	1484	taskeng.exe	42
PID 1484 wrote to memory of 1608	1484	taskeng.exe	42
PID 1484 wrote to memory of 1608	1484	taskeng.exe	42
PID 2072 wrote to memory of 2572	2072	webhack.exe	43
PID 2072 wrote to memory of 2572	2072	webhack.exe	43
PID 2072 wrote to memory of 2572	2072	webhack.exe	43
PID 2072 wrote to memory of 1632	2072	webhack.exe	45
PID 2072 wrote to memory of 1632	2072	webhack.exe	45
PID 2072 wrote to memory of 1632	2072	webhack.exe	45
PID 1632 wrote to memory of 1520	1632	cmd.exe	47
PID 1632 wrote to memory of 1520	1632	cmd.exe	47
PID 1632 wrote to memory of 1520	1632	cmd.exe	47

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\webhack.exe
"C:\Users\Admin\AppData\Local\Temp\webhack.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:2072
- 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\webhack.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2524
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'webhack.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2884
- 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\webhack.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2820
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "webhack" /tr "C:\Users\Admin\AppData\Local\webhack.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2772
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /delete /f /tn "webhack"
  2⤵
  PID:2572
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp163F.tmp.bat""
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1632
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1520

C:\Windows\system32\taskeng.exe
taskeng.exe {48644E6B-BFB4-49DC-AAC7-D06251E5E3C1} S-1-5-21-312935884-697965778-3955649944-1000:MXQFNXLT\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1484
- C:\Users\Admin\AppData\Local\webhack.exe
  C:\Users\Admin\AppData\Local\webhack.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1244
- C:\Users\Admin\AppData\Local\webhack.exe
  C:\Users\Admin\AppData\Local\webhack.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1608

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\tmp163F.tmp.bat

Filesize
159B

MD5
fe9579aee4b8d001a9469f4a732aa6a3

SHA1
f1667aed32771ea9e9414147c5c7b5455a40f50d

SHA256
753dd5fd92c7724ea7e73e5dd1aa0a93c3bcdddcb7a821caa825dc89b4cf5be4

SHA512
9547a82fba103660d8565dab8802a40f417ac2699fcc10e510b0a56bd468c9312ca7d57ca8b7070eccb33c79eda950e4fa984a7626127521493739b70d012427

Download Submit
C:\Users\Admin\AppData\Local\webhack.exe

Filesize
80KB

MD5
bee4a56d9ba0426d3c95dde1970f6429

SHA1
2bfa99521d4a4f2ed6f9b457074ecf1fae7cd712

SHA256
d6684b27eb3b9913fd9742bf3ce9c38e5f089211b0c105893e44eeaf79f691a2

SHA512
294855ac413dec844467c23ddef1dd87334d0f83f5053a6e9e0b66f032d48e748351f4fa95e166d33c4385c4734d4f4af27365d3379d480a5b5a8ecb30e5f660

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

Filesize
7KB

MD5
3ed501eb347a94dc2045c13010c2df43

SHA1
64ea25d6eff456bd5039fab8b3e11e0251068904

SHA256
46d32e4e4429808524481d0daee0c79dcabbfbdf7b93b14242f693be2ecbbbab

SHA512
9e92aa403e47372fb495ef1d76c5ab8dfc7a6005a3d87ab3361c5043cf8d8f8ae920f61c8bef5615645e1c05355bf55cc2530de58ec002717015492c11863b84

Download Submit
memory/1244-36-0x0000000001250000-0x000000000126A000-memory.dmp

Filesize
104KB

Download
memory/2072-31-0x000000001B270000-0x000000001B2F0000-memory.dmp

Filesize
512KB

Download
memory/2072-1-0x00000000012E0000-0x00000000012FA000-memory.dmp

Filesize
104KB

Download
memory/2072-0-0x000007FEF5573000-0x000007FEF5574000-memory.dmp

Filesize
4KB

Download
memory/2072-32-0x000000001B270000-0x000000001B2F0000-memory.dmp

Filesize
512KB

Download
memory/2072-30-0x000007FEF5573000-0x000007FEF5574000-memory.dmp

Filesize
4KB

Download
memory/2524-7-0x000000001B5E0000-0x000000001B8C2000-memory.dmp

Filesize
2.9MB

Download
memory/2524-8-0x0000000002820000-0x0000000002828000-memory.dmp

Filesize
32KB

Download
memory/2524-6-0x0000000002940000-0x00000000029C0000-memory.dmp

Filesize
512KB

Download
memory/2884-15-0x0000000002350000-0x0000000002358000-memory.dmp

Filesize
32KB

Download
memory/2884-14-0x000000001B5C0000-0x000000001B8A2000-memory.dmp

Filesize
2.9MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads