xworm | f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc

Analysis

max time kernel
150s
max time network
151s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
18-11-2024 02:53

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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/0x0009000000012266-2.dat	family_xworm
behavioral1/memory/2816-4-0x0000000000E80000-0x0000000000EB8000-memory.dmp	family_xworm
behavioral1/memory/2128-35-0x00000000013B0000-0x00000000013E8000-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
2456	powershell.exe
2700	powershell.exe
2832	powershell.exe
2336	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
2816	msedge.exe
2128	Msedge.exe
816	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
568	cmd.exe
2924	cmd.exe

Kills process with taskkill 4 IoCs

evasion

pid	Process
2864	taskkill.exe
2876	taskkill.exe
2208	taskkill.exe
3064	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
2380	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2456	powershell.exe
2700	powershell.exe
2832	powershell.exe
2336	powershell.exe
2816	msedge.exe

Suspicious use of AdjustPrivilegeToken 12 IoCs

description	pid	Process
Token: SeDebugPrivilege	2864	taskkill.exe
Token: SeDebugPrivilege	2876	taskkill.exe
Token: SeDebugPrivilege	2208	taskkill.exe
Token: SeDebugPrivilege	3064	taskkill.exe
Token: SeDebugPrivilege	2816	msedge.exe
Token: SeDebugPrivilege	2456	powershell.exe
Token: SeDebugPrivilege	2700	powershell.exe
Token: SeDebugPrivilege	2832	powershell.exe
Token: SeDebugPrivilege	2336	powershell.exe
Token: SeDebugPrivilege	2816	msedge.exe
Token: SeDebugPrivilege	2128	Msedge.exe
Token: SeDebugPrivilege	816	Msedge.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2816	msedge.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 2528 wrote to memory of 1272	2528	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	31
PID 2528 wrote to memory of 1272	2528	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	31
PID 2528 wrote to memory of 1272	2528	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	31
PID 1272 wrote to memory of 2864	1272	cmd.exe	32
PID 1272 wrote to memory of 2864	1272	cmd.exe	32
PID 1272 wrote to memory of 2864	1272	cmd.exe	32
PID 2528 wrote to memory of 2924	2528	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	34
PID 2528 wrote to memory of 2924	2528	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	34
PID 2528 wrote to memory of 2924	2528	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	34
PID 2924 wrote to memory of 2876	2924	cmd.exe	35
PID 2924 wrote to memory of 2876	2924	cmd.exe	35
PID 2924 wrote to memory of 2876	2924	cmd.exe	35
PID 2528 wrote to memory of 568	2528	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	36
PID 2528 wrote to memory of 568	2528	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	36
PID 2528 wrote to memory of 568	2528	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	36
PID 568 wrote to memory of 2208	568	cmd.exe	37
PID 568 wrote to memory of 2208	568	cmd.exe	37
PID 568 wrote to memory of 2208	568	cmd.exe	37
PID 2528 wrote to memory of 2964	2528	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	38
PID 2528 wrote to memory of 2964	2528	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	38
PID 2528 wrote to memory of 2964	2528	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	38
PID 2964 wrote to memory of 3064	2964	cmd.exe	39
PID 2964 wrote to memory of 3064	2964	cmd.exe	39
PID 2964 wrote to memory of 3064	2964	cmd.exe	39
PID 2528 wrote to memory of 1988	2528	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	40
PID 2528 wrote to memory of 1988	2528	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	40
PID 2528 wrote to memory of 1988	2528	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	40
PID 2528 wrote to memory of 2908	2528	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	41
PID 2528 wrote to memory of 2908	2528	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	41
PID 2528 wrote to memory of 2908	2528	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	41
PID 2908 wrote to memory of 2816	2908	cmd.exe	42
PID 2908 wrote to memory of 2816	2908	cmd.exe	42
PID 2908 wrote to memory of 2816	2908	cmd.exe	42
PID 2528 wrote to memory of 2992	2528	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	43
PID 2528 wrote to memory of 2992	2528	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	43
PID 2528 wrote to memory of 2992	2528	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	43
PID 2992 wrote to memory of 2772	2992	cmd.exe	44
PID 2992 wrote to memory of 2772	2992	cmd.exe	44
PID 2992 wrote to memory of 2772	2992	cmd.exe	44
PID 2992 wrote to memory of 2780	2992	cmd.exe	45
PID 2992 wrote to memory of 2780	2992	cmd.exe	45
PID 2992 wrote to memory of 2780	2992	cmd.exe	45
PID 2992 wrote to memory of 2788	2992	cmd.exe	46
PID 2992 wrote to memory of 2788	2992	cmd.exe	46
PID 2992 wrote to memory of 2788	2992	cmd.exe	46
PID 2816 wrote to memory of 2456	2816	msedge.exe	47
PID 2816 wrote to memory of 2456	2816	msedge.exe	47
PID 2816 wrote to memory of 2456	2816	msedge.exe	47
PID 2816 wrote to memory of 2700	2816	msedge.exe	49
PID 2816 wrote to memory of 2700	2816	msedge.exe	49
PID 2816 wrote to memory of 2700	2816	msedge.exe	49
PID 2816 wrote to memory of 2832	2816	msedge.exe	51
PID 2816 wrote to memory of 2832	2816	msedge.exe	51
PID 2816 wrote to memory of 2832	2816	msedge.exe	51
PID 2816 wrote to memory of 2336	2816	msedge.exe	53
PID 2816 wrote to memory of 2336	2816	msedge.exe	53
PID 2816 wrote to memory of 2336	2816	msedge.exe	53
PID 2816 wrote to memory of 2380	2816	msedge.exe	55
PID 2816 wrote to memory of 2380	2816	msedge.exe	55
PID 2816 wrote to memory of 2380	2816	msedge.exe	55
PID 1820 wrote to memory of 2128	1820	taskeng.exe	58
PID 1820 wrote to memory of 2128	1820	taskeng.exe	58
PID 1820 wrote to memory of 2128	1820	taskeng.exe	58
PID 1820 wrote to memory of 816	1820	taskeng.exe	59

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:2528
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c taskkill /IM EpicGamesLauncher.exe /F
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1272
- - C:\Windows\system32\taskkill.exe
    taskkill /IM EpicGamesLauncher.exe /F
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2864
- 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:2924
- - C:\Windows\system32\taskkill.exe
    taskkill /IM FortniteClient-Win64-Shipping_BE.exe /F
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2876
- 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:568
- - C:\Windows\system32\taskkill.exe
    taskkill /IM FortniteClient-Win64-Shipping.exe /F
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2208
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c taskkill /IM x64dbg.exe
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2964
- - C:\Windows\system32\taskkill.exe
    taskkill /IM x64dbg.exe
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:3064
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c cls
  2⤵
  PID:1988
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c start C:\Windows\msedge.exe
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2908
- - 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:2816
  - - 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:2456
  - - 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:2700
  - - 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:2832
  - - 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:2336
  - - 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:2380
- 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:2992
- - C:\Windows\system32\certutil.exe
    certutil -hashfile "C:\Users\Admin\AppData\Local\Temp\f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe" MD5
    3⤵
    PID:2772
- - C:\Windows\system32\find.exe
    find /i /v "md5"
    3⤵
    PID:2780
- - C:\Windows\system32\find.exe
    find /i /v "certutil"
    3⤵
    PID:2788

C:\Windows\system32\taskeng.exe
taskeng.exe {9E205758-A1F9-4D45-9BE8-E2EE8F30CA88} S-1-5-21-3692679935-4019334568-335155002-1000:BCXRJFKE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1820
- C:\Users\Public\Msedge.exe
  C:\Users\Public\Msedge.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2128
- C:\Users\Public\Msedge.exe
  C:\Users\Public\Msedge.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:816

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

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Downloads

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

Filesize
7KB

MD5
c39cc50d37e9cee6f159c4f58f382f2e

SHA1
cfea204bdd090a2cc3f692d30d18106824cc8441

SHA256
82e75cad3ccbdf47e3955b56f2f9bbe21b70b506aaac7117c44daf0d2bc5cdb3

SHA512
57520456f4e81684d719a35bbd7f94bd8bacfe08efe192f111e8558cafe1fe29f2f8eea3223f268ddaa5eaae73bfc3f2e9d6689d7797c09faec482ce2734f080

Download Submit
C:\Windows\msedge.exe

Filesize
204KB

MD5
4738e3496a3efe5f19c57b764eb5ba9b

SHA1
da9163944b1f51438b2602cbc95660af43172065

SHA256
cb51764f19e66bb6accd7f0418332bac7759073ed245f0633dddd53f68e81933

SHA512
4cb3029e136471edf2ebb46d1e4fc3a70e5138a5bd4b3fb182b6746d00c69fd5cf8822c0c90c2bcb4d8276db0cecac16ea0198e18a44e755a340495b19cc2238

Download Submit
memory/2128-35-0x00000000013B0000-0x00000000013E8000-memory.dmp

Filesize
224KB

Download
memory/2456-9-0x000000001B230000-0x000000001B512000-memory.dmp

Filesize
2.9MB

Download
memory/2456-10-0x0000000002020000-0x0000000002028000-memory.dmp

Filesize
32KB

Download
memory/2700-16-0x000000001B2B0000-0x000000001B592000-memory.dmp

Filesize
2.9MB

Download
memory/2700-17-0x0000000001E60000-0x0000000001E68000-memory.dmp

Filesize
32KB

Download
memory/2816-4-0x0000000000E80000-0x0000000000EB8000-memory.dmp

Filesize
224KB

Download