xworm | f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-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 2 IoCs

resource	yara_rule
behavioral2/files/0x0009000000023c9d-2.dat	family_xworm
behavioral2/memory/3412-4-0x0000000000AF0000-0x0000000000B28000-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
1768	powershell.exe
4352	powershell.exe
548	powershell.exe
976	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	msedge.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
3412	msedge.exe
1868	Msedge.exe
1640	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
21	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
4912	cmd.exe
3308	cmd.exe

Kills process with taskkill 4 IoCs

evasion

pid	Process
5044	taskkill.exe
1604	taskkill.exe
2776	taskkill.exe
3652	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
4056	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
548	powershell.exe
548	powershell.exe
976	powershell.exe
976	powershell.exe
1768	powershell.exe
1768	powershell.exe
4352	powershell.exe
4352	powershell.exe
3412	msedge.exe

Suspicious use of AdjustPrivilegeToken 12 IoCs

description	pid	Process
Token: SeDebugPrivilege	1604	taskkill.exe
Token: SeDebugPrivilege	2776	taskkill.exe
Token: SeDebugPrivilege	3652	taskkill.exe
Token: SeDebugPrivilege	5044	taskkill.exe
Token: SeDebugPrivilege	3412	msedge.exe
Token: SeDebugPrivilege	548	powershell.exe
Token: SeDebugPrivilege	976	powershell.exe
Token: SeDebugPrivilege	1768	powershell.exe
Token: SeDebugPrivilege	4352	powershell.exe
Token: SeDebugPrivilege	3412	msedge.exe
Token: SeDebugPrivilege	1868	Msedge.exe
Token: SeDebugPrivilege	1640	Msedge.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3412	msedge.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 872 wrote to memory of 2552	872	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	84
PID 872 wrote to memory of 2552	872	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	84
PID 2552 wrote to memory of 1604	2552	cmd.exe	85
PID 2552 wrote to memory of 1604	2552	cmd.exe	85
PID 872 wrote to memory of 4912	872	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	87
PID 872 wrote to memory of 4912	872	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	87
PID 4912 wrote to memory of 2776	4912	cmd.exe	88
PID 4912 wrote to memory of 2776	4912	cmd.exe	88
PID 872 wrote to memory of 3308	872	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	89
PID 872 wrote to memory of 3308	872	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	89
PID 3308 wrote to memory of 3652	3308	cmd.exe	90
PID 3308 wrote to memory of 3652	3308	cmd.exe	90
PID 872 wrote to memory of 3860	872	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	91
PID 872 wrote to memory of 3860	872	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	91
PID 3860 wrote to memory of 5044	3860	cmd.exe	92
PID 3860 wrote to memory of 5044	3860	cmd.exe	92
PID 872 wrote to memory of 1860	872	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	94
PID 872 wrote to memory of 1860	872	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	94
PID 872 wrote to memory of 3656	872	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	95
PID 872 wrote to memory of 3656	872	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	95
PID 3656 wrote to memory of 3412	3656	cmd.exe	96
PID 3656 wrote to memory of 3412	3656	cmd.exe	96
PID 872 wrote to memory of 2344	872	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	97
PID 872 wrote to memory of 2344	872	f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe	97
PID 2344 wrote to memory of 1276	2344	cmd.exe	98
PID 2344 wrote to memory of 1276	2344	cmd.exe	98
PID 2344 wrote to memory of 4172	2344	cmd.exe	99
PID 2344 wrote to memory of 4172	2344	cmd.exe	99
PID 2344 wrote to memory of 224	2344	cmd.exe	100
PID 2344 wrote to memory of 224	2344	cmd.exe	100
PID 3412 wrote to memory of 548	3412	msedge.exe	107
PID 3412 wrote to memory of 548	3412	msedge.exe	107
PID 3412 wrote to memory of 976	3412	msedge.exe	109
PID 3412 wrote to memory of 976	3412	msedge.exe	109
PID 3412 wrote to memory of 1768	3412	msedge.exe	111
PID 3412 wrote to memory of 1768	3412	msedge.exe	111
PID 3412 wrote to memory of 4352	3412	msedge.exe	113
PID 3412 wrote to memory of 4352	3412	msedge.exe	113
PID 3412 wrote to memory of 4056	3412	msedge.exe	116
PID 3412 wrote to memory of 4056	3412	msedge.exe	116

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:872
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c taskkill /IM EpicGamesLauncher.exe /F
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2552
- - C:\Windows\system32\taskkill.exe
    taskkill /IM EpicGamesLauncher.exe /F
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1604
- 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:4912
- - C:\Windows\system32\taskkill.exe
    taskkill /IM FortniteClient-Win64-Shipping_BE.exe /F
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2776
- 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:3308
- - C:\Windows\system32\taskkill.exe
    taskkill /IM FortniteClient-Win64-Shipping.exe /F
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:3652
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c taskkill /IM x64dbg.exe
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3860
- - C:\Windows\system32\taskkill.exe
    taskkill /IM x64dbg.exe
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:5044
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c cls
  2⤵
  PID:1860
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c start C:\Windows\msedge.exe
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3656
- - C:\Windows\msedge.exe
    C:\Windows\msedge.exe
    3⤵
    - Checks computer location settings
    - Drops startup file
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3412
  - - 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:548
  - - 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:976
  - - 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:1768
  - - 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:4352
  - - 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:4056
- 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:2344
- - C:\Windows\system32\certutil.exe
    certutil -hashfile "C:\Users\Admin\AppData\Local\Temp\f126b1c0b4ff973d9618b7287d011b61731c2b0e5e9960c72f5ef444288aa8dc.exe" MD5
    3⤵
    PID:1276
- - C:\Windows\system32\find.exe
    find /i /v "md5"
    3⤵
    PID:4172
- - C:\Windows\system32\find.exe
    find /i /v "certutil"
    3⤵
    PID:224

C:\Users\Public\Msedge.exe
C:\Users\Public\Msedge.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1868

C:\Users\Public\Msedge.exe
C:\Users\Public\Msedge.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1640

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\Local\Microsoft\CLR_v4.0\UsageLogs\Msedge.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
10890cda4b6eab618e926c4118ab0647

SHA1
1e1d63b73a0e6c7575f458b3c7917a9ce5ba776d

SHA256
00f8a035324d39bd62e6dee5e1b480069015471c487ebee4479e6990ea9ddb14

SHA512
a2ee84006c24a36f25e0bca0772430d64e3791f233da916aecdeae6712763e77d55bbbd00dc8f6b2b3887f3c26ab3980b96c5f46cc823e81e28abbbc5fc78221

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
c08aea9c78561a5f00398a723fdf2925

SHA1
2c880cbb5d02169a86bb9517ce2a0184cb177c6e

SHA256
63d2688b92da4d1bb69980b7998b9be1595dd9e53951434a9414d019c4f825a7

SHA512
d30db2f55bbda7102ffe90520d233355633313dcc77cdb69a26fdbb56e59dd41793def23d69dc5dc3f94c5bd41d3c26b3628886fd2edbed2df0b332e9a21f95c

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1k3bpf23.4sp.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Windows\msedge.exe

Filesize
204KB

MD5
4738e3496a3efe5f19c57b764eb5ba9b

SHA1
da9163944b1f51438b2602cbc95660af43172065

SHA256
cb51764f19e66bb6accd7f0418332bac7759073ed245f0633dddd53f68e81933

SHA512
4cb3029e136471edf2ebb46d1e4fc3a70e5138a5bd4b3fb182b6746d00c69fd5cf8822c0c90c2bcb4d8276db0cecac16ea0198e18a44e755a340495b19cc2238

Download Submit
memory/548-10-0x000001D31C460000-0x000001D31C482000-memory.dmp

Filesize
136KB

Download
memory/3412-4-0x0000000000AF0000-0x0000000000B28000-memory.dmp

Filesize
224KB

Download