xworm | f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc

Analysis

max time kernel
150s
max time network
142s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
17-11-2024 18:19

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General

Target

f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe
Size

867KB
MD5

a8bd5b655845ba8a23a38abfd7e1bb03
SHA1

90b245be80f5beb8b7b0e50bf910e1b4bff1f1cf
SHA256

f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc
SHA512

f560893e04ee817be99c07a42ea654ce3f2ceaddcb3a644094a5316333ce85911f87eb06c10960673d53050e9b4a60410f0c61169c21e203014ba338138ed664
SSDEEP

12288:i98NVBjvwSRz04lj4k/GG6yY5adl8M64mzx8B/wmtilK6yEbx9:vV9vT5lj4MGdyY5SWv4mM/eyEr

Score

10^/10

xworm discovery execution rat trojan

Malware Config

Extracted

Family

xworm

45.84.199.152:7000

Attributes

Install_directory
%Public%
install_file
Msedge.exe

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/files/0x00080000000120fe-2.dat	family_xworm
behavioral1/memory/2780-4-0x0000000000070000-0x00000000000A8000-memory.dmp	family_xworm
behavioral1/memory/2252-37-0x0000000000BB0000-0x0000000000BE8000-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
1064	powershell.exe
2148	powershell.exe
1412	powershell.exe
2140	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\Msedge.lnk	msedge.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Msedge.lnk	msedge.exe

Executes dropped EXE 3 IoCs

pid	Process
2780	msedge.exe
2252	Msedge.exe
1592	Msedge.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
10	ip-api.com

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\msedge.exe	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe

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

System Information Discovery
T1082

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2412	cmd.exe
2716	cmd.exe

Kills process with taskkill 4 IoCs

evasion

pid	Process
2084	taskkill.exe
2176	taskkill.exe
1960	taskkill.exe
1724	taskkill.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
2728	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2148	powershell.exe
1412	powershell.exe
2140	powershell.exe
1064	powershell.exe
2780	msedge.exe

Suspicious use of AdjustPrivilegeToken 12 IoCs

description	pid	Process
Token: SeDebugPrivilege	1960	taskkill.exe
Token: SeDebugPrivilege	1724	taskkill.exe
Token: SeDebugPrivilege	2084	taskkill.exe
Token: SeDebugPrivilege	2176	taskkill.exe
Token: SeDebugPrivilege	2780	msedge.exe
Token: SeDebugPrivilege	2148	powershell.exe
Token: SeDebugPrivilege	1412	powershell.exe
Token: SeDebugPrivilege	2140	powershell.exe
Token: SeDebugPrivilege	1064	powershell.exe
Token: SeDebugPrivilege	2780	msedge.exe
Token: SeDebugPrivilege	2252	Msedge.exe
Token: SeDebugPrivilege	1592	Msedge.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2780	msedge.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 2500 wrote to memory of 2564	2500	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	31
PID 2500 wrote to memory of 2564	2500	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	31
PID 2500 wrote to memory of 2564	2500	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	31
PID 2564 wrote to memory of 1960	2564	cmd.exe	32
PID 2564 wrote to memory of 1960	2564	cmd.exe	32
PID 2564 wrote to memory of 1960	2564	cmd.exe	32
PID 2500 wrote to memory of 2412	2500	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	34
PID 2500 wrote to memory of 2412	2500	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	34
PID 2500 wrote to memory of 2412	2500	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	34
PID 2412 wrote to memory of 1724	2412	cmd.exe	35
PID 2412 wrote to memory of 1724	2412	cmd.exe	35
PID 2412 wrote to memory of 1724	2412	cmd.exe	35
PID 2500 wrote to memory of 2716	2500	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	36
PID 2500 wrote to memory of 2716	2500	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	36
PID 2500 wrote to memory of 2716	2500	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	36
PID 2716 wrote to memory of 2084	2716	cmd.exe	37
PID 2716 wrote to memory of 2084	2716	cmd.exe	37
PID 2716 wrote to memory of 2084	2716	cmd.exe	37
PID 2500 wrote to memory of 2236	2500	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	38
PID 2500 wrote to memory of 2236	2500	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	38
PID 2500 wrote to memory of 2236	2500	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	38
PID 2236 wrote to memory of 2176	2236	cmd.exe	39
PID 2236 wrote to memory of 2176	2236	cmd.exe	39
PID 2236 wrote to memory of 2176	2236	cmd.exe	39
PID 2500 wrote to memory of 2504	2500	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	40
PID 2500 wrote to memory of 2504	2500	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	40
PID 2500 wrote to memory of 2504	2500	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	40
PID 2500 wrote to memory of 2772	2500	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	41
PID 2500 wrote to memory of 2772	2500	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	41
PID 2500 wrote to memory of 2772	2500	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	41
PID 2772 wrote to memory of 2780	2772	cmd.exe	42
PID 2772 wrote to memory of 2780	2772	cmd.exe	42
PID 2772 wrote to memory of 2780	2772	cmd.exe	42
PID 2500 wrote to memory of 2864	2500	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	43
PID 2500 wrote to memory of 2864	2500	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	43
PID 2500 wrote to memory of 2864	2500	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	43
PID 2864 wrote to memory of 2888	2864	cmd.exe	44
PID 2864 wrote to memory of 2888	2864	cmd.exe	44
PID 2864 wrote to memory of 2888	2864	cmd.exe	44
PID 2864 wrote to memory of 2848	2864	cmd.exe	45
PID 2864 wrote to memory of 2848	2864	cmd.exe	45
PID 2864 wrote to memory of 2848	2864	cmd.exe	45
PID 2864 wrote to memory of 2788	2864	cmd.exe	46
PID 2864 wrote to memory of 2788	2864	cmd.exe	46
PID 2864 wrote to memory of 2788	2864	cmd.exe	46
PID 2780 wrote to memory of 2148	2780	msedge.exe	48
PID 2780 wrote to memory of 2148	2780	msedge.exe	48
PID 2780 wrote to memory of 2148	2780	msedge.exe	48
PID 2780 wrote to memory of 1412	2780	msedge.exe	50
PID 2780 wrote to memory of 1412	2780	msedge.exe	50
PID 2780 wrote to memory of 1412	2780	msedge.exe	50
PID 2780 wrote to memory of 2140	2780	msedge.exe	52
PID 2780 wrote to memory of 2140	2780	msedge.exe	52
PID 2780 wrote to memory of 2140	2780	msedge.exe	52
PID 2780 wrote to memory of 1064	2780	msedge.exe	54
PID 2780 wrote to memory of 1064	2780	msedge.exe	54
PID 2780 wrote to memory of 1064	2780	msedge.exe	54
PID 2780 wrote to memory of 2728	2780	msedge.exe	56
PID 2780 wrote to memory of 2728	2780	msedge.exe	56
PID 2780 wrote to memory of 2728	2780	msedge.exe	56
PID 1244 wrote to memory of 2252	1244	taskeng.exe	59
PID 1244 wrote to memory of 2252	1244	taskeng.exe	59
PID 1244 wrote to memory of 2252	1244	taskeng.exe	59
PID 1244 wrote to memory of 1592	1244	taskeng.exe	60

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\f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe
"C:\Users\Admin\AppData\Local\Temp\f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe"
1⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2500
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c taskkill /IM EpicGamesLauncher.exe /F
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2564
- - C:\Windows\system32\taskkill.exe
    taskkill /IM EpicGamesLauncher.exe /F
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1960
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c taskkill /IM FortniteClient-Win64-Shipping_BE.exe /F
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2412
- - C:\Windows\system32\taskkill.exe
    taskkill /IM FortniteClient-Win64-Shipping_BE.exe /F
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1724
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c taskkill /IM FortniteClient-Win64-Shipping.exe /F
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2716
- - C:\Windows\system32\taskkill.exe
    taskkill /IM FortniteClient-Win64-Shipping.exe /F
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2084
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c taskkill /IM x64dbg.exe
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2236
- - C:\Windows\system32\taskkill.exe
    taskkill /IM x64dbg.exe
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2176
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c cls
  2⤵
  PID:2504
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c start C:\Windows\msedge.exe
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2772
- - C:\Windows\msedge.exe
    C:\Windows\msedge.exe
    3⤵
    - Drops startup file
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2780
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Windows\msedge.exe'
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2148
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'msedge.exe'
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1412
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Public\Msedge.exe'
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2140
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Msedge.exe'
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1064
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Msedge" /tr "C:\Users\Public\Msedge.exe"
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:2728
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c certutil -hashfile "C:\Users\Admin\AppData\Local\Temp\f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe" MD5 | find /i /v "md5" | find /i /v "certutil"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2864
- - C:\Windows\system32\certutil.exe
    certutil -hashfile "C:\Users\Admin\AppData\Local\Temp\f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe" MD5
    3⤵
    PID:2888
- - C:\Windows\system32\find.exe
    find /i /v "md5"
    3⤵
    PID:2848
- - C:\Windows\system32\find.exe
    find /i /v "certutil"
    3⤵
    PID:2788

C:\Windows\system32\taskeng.exe
taskeng.exe {BB637F54-61C6-4918-9247-98E912CE4C97} S-1-5-21-2703099537-420551529-3771253338-1000:XECUDNCD\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1244
- C:\Users\Public\Msedge.exe
  C:\Users\Public\Msedge.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2252
- C:\Users\Public\Msedge.exe
  C:\Users\Public\Msedge.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1592

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
7KB

MD5
7ba86d78b65cee433098768f7c811c63

SHA1
d92fecaf5c13c810a358b35d1de57849037ac12b

SHA256
3f63a1b97ca7bd020d1c9667dadc0ca9a5b6789e231cabeb3bad48c965b233a0

SHA512
4179aa8dae0b97eb264f991dd7a750cda8b8337d1325e63c604bccd4f751724c00861e7beaeb871f4032ebb74bdf61cf291c381483ea61674d8fe1b504e0b9b9

Download Submit
C:\Windows\msedge.exe

Filesize
204KB

MD5
4738e3496a3efe5f19c57b764eb5ba9b

SHA1
da9163944b1f51438b2602cbc95660af43172065

SHA256
cb51764f19e66bb6accd7f0418332bac7759073ed245f0633dddd53f68e81933

SHA512
4cb3029e136471edf2ebb46d1e4fc3a70e5138a5bd4b3fb182b6746d00c69fd5cf8822c0c90c2bcb4d8276db0cecac16ea0198e18a44e755a340495b19cc2238

Download Submit
memory/1412-16-0x000000001B500000-0x000000001B7E2000-memory.dmp

Filesize
2.9MB

Download
memory/1412-17-0x0000000002250000-0x0000000002258000-memory.dmp

Filesize
32KB

Download
memory/2148-9-0x000000001B610000-0x000000001B8F2000-memory.dmp

Filesize
2.9MB

Download
memory/2148-10-0x0000000001D90000-0x0000000001D98000-memory.dmp

Filesize
32KB

Download
memory/2252-37-0x0000000000BB0000-0x0000000000BE8000-memory.dmp

Filesize
224KB

Download
memory/2780-4-0x0000000000070000-0x00000000000A8000-memory.dmp

Filesize
224KB

Download