xworm | 64348ec4267b52c1a7f639ccfaf9478b6d5159f796176076650901e5b7c0e1df

Analysis

max time kernel
1790s
max time network
1797s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
20-11-2024 22:08

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General

Target

tumblr-main/svchost.exe
Size

54KB
MD5

161f7262ae9a6d95ce0f93e46cc5fcf9
SHA1

164551a9330c19a9ed62b6e7d54c6d247704b5e0
SHA256

73a74ebd5e95700aef901c8771fc4b64a677885f23e15bd67628b38e726f7408
SHA512

63bcc54b5846ec20e65c660054d5f6051f357bf803451bf740d7d27505dcc3497a122d62e62ed966329d5b713b8848300bb5ddd77025a3b53cd0d53a19a4c3ea
SSDEEP

1536:SgkETz/wBd3o3nnJWbdWDc06KVnO/jtg:SGnIcXJWbdWBnO/xg

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

45.10.151.182:7000

Attributes

Install_directory
%AppData%
install_file
svchost.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral7/memory/3336-1-0x0000000000530000-0x0000000000544000-memory.dmp	family_xworm
behavioral7/files/0x002c00000004506e-59.dat	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
2584	powershell.exe
4212	powershell.exe
3528	powershell.exe
2240	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-1-5-21-4074627901-37362009-3519777259-1000\Control Panel\International\Geo\Nation	svchost.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 30 IoCs

pid	Process
3200	svchost.exe
784	svchost.exe
5072	svchost.exe
3184	svchost.exe
2068	svchost.exe
4060	svchost.exe
2984	svchost.exe
5072	svchost.exe
3340	svchost.exe
2472	svchost.exe
3932	svchost.exe
3188	svchost.exe
1496	svchost.exe
376	svchost.exe
1092	svchost.exe
2648	svchost.exe
3788	svchost.exe
1276	svchost.exe
4872	svchost.exe
3736	svchost.exe
3508	svchost.exe
2860	svchost.exe
1920	svchost.exe
1540	svchost.exe
4000	svchost.exe
3004	svchost.exe
2900	svchost.exe
2108	svchost.exe
1684	svchost.exe
2824	svchost.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-1-5-21-4074627901-37362009-3519777259-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	svchost.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
17	ip-api.com

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
4620	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2584	powershell.exe
2584	powershell.exe
4212	powershell.exe
4212	powershell.exe
3528	powershell.exe
3528	powershell.exe
2240	powershell.exe
2240	powershell.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3336	svchost.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3336	svchost.exe
Token: SeDebugPrivilege	2584	powershell.exe
Token: SeIncreaseQuotaPrivilege	2584	powershell.exe
Token: SeSecurityPrivilege	2584	powershell.exe
Token: SeTakeOwnershipPrivilege	2584	powershell.exe
Token: SeLoadDriverPrivilege	2584	powershell.exe
Token: SeSystemProfilePrivilege	2584	powershell.exe
Token: SeSystemtimePrivilege	2584	powershell.exe
Token: SeProfSingleProcessPrivilege	2584	powershell.exe
Token: SeIncBasePriorityPrivilege	2584	powershell.exe
Token: SeCreatePagefilePrivilege	2584	powershell.exe
Token: SeBackupPrivilege	2584	powershell.exe
Token: SeRestorePrivilege	2584	powershell.exe
Token: SeShutdownPrivilege	2584	powershell.exe
Token: SeDebugPrivilege	2584	powershell.exe
Token: SeSystemEnvironmentPrivilege	2584	powershell.exe
Token: SeRemoteShutdownPrivilege	2584	powershell.exe
Token: SeUndockPrivilege	2584	powershell.exe
Token: SeManageVolumePrivilege	2584	powershell.exe
Token: 33	2584	powershell.exe
Token: 34	2584	powershell.exe
Token: 35	2584	powershell.exe
Token: 36	2584	powershell.exe
Token: SeDebugPrivilege	4212	powershell.exe
Token: SeIncreaseQuotaPrivilege	4212	powershell.exe
Token: SeSecurityPrivilege	4212	powershell.exe
Token: SeTakeOwnershipPrivilege	4212	powershell.exe
Token: SeLoadDriverPrivilege	4212	powershell.exe
Token: SeSystemProfilePrivilege	4212	powershell.exe
Token: SeSystemtimePrivilege	4212	powershell.exe
Token: SeProfSingleProcessPrivilege	4212	powershell.exe
Token: SeIncBasePriorityPrivilege	4212	powershell.exe
Token: SeCreatePagefilePrivilege	4212	powershell.exe
Token: SeBackupPrivilege	4212	powershell.exe
Token: SeRestorePrivilege	4212	powershell.exe
Token: SeShutdownPrivilege	4212	powershell.exe
Token: SeDebugPrivilege	4212	powershell.exe
Token: SeSystemEnvironmentPrivilege	4212	powershell.exe
Token: SeRemoteShutdownPrivilege	4212	powershell.exe
Token: SeUndockPrivilege	4212	powershell.exe
Token: SeManageVolumePrivilege	4212	powershell.exe
Token: 33	4212	powershell.exe
Token: 34	4212	powershell.exe
Token: 35	4212	powershell.exe
Token: 36	4212	powershell.exe
Token: SeDebugPrivilege	3528	powershell.exe
Token: SeIncreaseQuotaPrivilege	3528	powershell.exe
Token: SeSecurityPrivilege	3528	powershell.exe
Token: SeTakeOwnershipPrivilege	3528	powershell.exe
Token: SeLoadDriverPrivilege	3528	powershell.exe
Token: SeSystemProfilePrivilege	3528	powershell.exe
Token: SeSystemtimePrivilege	3528	powershell.exe
Token: SeProfSingleProcessPrivilege	3528	powershell.exe
Token: SeIncBasePriorityPrivilege	3528	powershell.exe
Token: SeCreatePagefilePrivilege	3528	powershell.exe
Token: SeBackupPrivilege	3528	powershell.exe
Token: SeRestorePrivilege	3528	powershell.exe
Token: SeShutdownPrivilege	3528	powershell.exe
Token: SeDebugPrivilege	3528	powershell.exe
Token: SeSystemEnvironmentPrivilege	3528	powershell.exe
Token: SeRemoteShutdownPrivilege	3528	powershell.exe
Token: SeUndockPrivilege	3528	powershell.exe
Token: SeManageVolumePrivilege	3528	powershell.exe
Token: 33	3528	powershell.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3336 wrote to memory of 2584	3336	svchost.exe	86
PID 3336 wrote to memory of 2584	3336	svchost.exe	86
PID 3336 wrote to memory of 4212	3336	svchost.exe	89
PID 3336 wrote to memory of 4212	3336	svchost.exe	89
PID 3336 wrote to memory of 3528	3336	svchost.exe	92
PID 3336 wrote to memory of 3528	3336	svchost.exe	92
PID 3336 wrote to memory of 2240	3336	svchost.exe	94
PID 3336 wrote to memory of 2240	3336	svchost.exe	94
PID 3336 wrote to memory of 4620	3336	svchost.exe	96
PID 3336 wrote to memory of 4620	3336	svchost.exe	96

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\tumblr-main\svchost.exe
"C:\Users\Admin\AppData\Local\Temp\tumblr-main\svchost.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3336
- 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\tumblr-main\svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2584
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4212
- 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\Roaming\svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3528
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:2240
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Admin\AppData\Roaming\svchost.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4620

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
1⤵
- Executes dropped EXE
PID:3200

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
1⤵
- Executes dropped EXE
PID:784

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
1⤵
- Executes dropped EXE
PID:5072

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
1⤵
- Executes dropped EXE
PID:3184

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
1⤵
- Executes dropped EXE
PID:2068

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
1⤵
- Executes dropped EXE
PID:4060

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
1⤵
- Executes dropped EXE
PID:2984

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
1⤵
- Executes dropped EXE
PID:5072

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
1⤵
- Executes dropped EXE
PID:3340

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
1⤵
- Executes dropped EXE
PID:2472

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
1⤵
- Executes dropped EXE
PID:3932

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
1⤵
- Executes dropped EXE
PID:3188

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
1⤵
- Executes dropped EXE
PID:1496

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
1⤵
- Executes dropped EXE
PID:376

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
1⤵
- Executes dropped EXE
PID:1092

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
1⤵
- Executes dropped EXE
PID:2648

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
1⤵
- Executes dropped EXE
PID:3788

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
1⤵
- Executes dropped EXE
PID:1276

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
1⤵
- Executes dropped EXE
PID:4872

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
1⤵
- Executes dropped EXE
PID:3736

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
1⤵
- Executes dropped EXE
PID:3508

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
1⤵
- Executes dropped EXE
PID:2860

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
1⤵
- Executes dropped EXE
PID:1920

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
1⤵
- Executes dropped EXE
PID:1540

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
1⤵
- Executes dropped EXE
PID:4000

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
1⤵
- Executes dropped EXE
PID:3004

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
1⤵
- Executes dropped EXE
PID:2900

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
1⤵
- Executes dropped EXE
PID:2108

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
1⤵
- Executes dropped EXE
PID:1684

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
1⤵
- Executes dropped EXE
PID:2824

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

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
3KB

MD5
3eb3833f769dd890afc295b977eab4b4

SHA1
e857649b037939602c72ad003e5d3698695f436f

SHA256
c485a6e2fd17c342fca60060f47d6a5655a65a412e35e001bb5bf88d96e6e485

SHA512
c24bbc8f278478d43756807b8c584d4e3fb2289db468bc92986a489f74a8da386a667a758360a397e77e018e363be8912ac260072fa3e31117ad0599ac749e72

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

Filesize
654B

MD5
11c6e74f0561678d2cf7fc075a6cc00c

SHA1
535ee79ba978554abcb98c566235805e7ea18490

SHA256
d39a78fabca39532fcb85ce908781a75132e1bd01cc50a3b290dd87127837d63

SHA512
32c63d67bf512b42e7f57f71287b354200126cb417ef9d869c72e0b9388a7c2f5e3b61f303f1353baa1bf482d0f17e06e23c9f50b2f1babd4d958b6da19c40b0

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

Filesize
1KB

MD5
60b3262c3163ee3d466199160b9ed07d

SHA1
994ece4ea4e61de0be2fdd580f87e3415f9e1ff6

SHA256
e3b30f16d41f94cba2b8a75f35c91ae7418465abfbfe5477ec0551d1952b2fdb

SHA512
081d2015cb94477eb0fbc38f44b6d9b4a3204fb3ad0b7d0e146a88ab4ab9a0d475207f1adae03f4a81ccc5beb7568dc8be1249f69e32fe56efd9ee2f6ee3b1af

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

Filesize
1KB

MD5
56225a76c58b72128b7c09ef90b0256f

SHA1
6e1abf596acf38a87899d493308352f84340f547

SHA256
a2a672f12408bfd169dcf57cdc659da6975e5aad6d2ef9e98d1c13c7fb0bd6b8

SHA512
511c3ed4bde7f3c662de4b118be243e99c41f9ec08ee2bafdc81994e43ba55e623b91c4c24fd389e61824bbd30f987688d25b15e326068f22b74018bfc7dc06a

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

Filesize
1KB

MD5
598b69320ef706b945ff3a568323127a

SHA1
40848c25fbdeffa38b74b15e691ceec37a3042e8

SHA256
0a41cfbe75f656020328df4f385c0d689e2f48ab173f33010455cca9a07b8137

SHA512
e32d996efc78c352050ace009e9f95495a0bc64c8e3a7fa3ce445532fdb7ea486351468d6e197bfa891b10d87d97eecfb94e58a84a0141cb72c103c36893243a

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_lnbibwle.zj5.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\svchost.exe

Filesize
54KB

MD5
161f7262ae9a6d95ce0f93e46cc5fcf9

SHA1
164551a9330c19a9ed62b6e7d54c6d247704b5e0

SHA256
73a74ebd5e95700aef901c8771fc4b64a677885f23e15bd67628b38e726f7408

SHA512
63bcc54b5846ec20e65c660054d5f6051f357bf803451bf740d7d27505dcc3497a122d62e62ed966329d5b713b8848300bb5ddd77025a3b53cd0d53a19a4c3ea

Download Submit
memory/2584-12-0x00007FFA7CAD0000-0x00007FFA7D592000-memory.dmp

Filesize
10.8MB

Download
memory/2584-16-0x00007FFA7CAD0000-0x00007FFA7D592000-memory.dmp

Filesize
10.8MB

Download
memory/2584-19-0x00007FFA7CAD0000-0x00007FFA7D592000-memory.dmp

Filesize
10.8MB

Download
memory/2584-15-0x00007FFA7CAD0000-0x00007FFA7D592000-memory.dmp

Filesize
10.8MB

Download
memory/2584-14-0x00007FFA7CAD0000-0x00007FFA7D592000-memory.dmp

Filesize
10.8MB

Download
memory/2584-13-0x00007FFA7CAD0000-0x00007FFA7D592000-memory.dmp

Filesize
10.8MB

Download
memory/2584-2-0x000001B70F9F0000-0x000001B70FA12000-memory.dmp

Filesize
136KB

Download
memory/3336-0-0x00007FFA7CAD3000-0x00007FFA7CAD5000-memory.dmp

Filesize
8KB

Download
memory/3336-54-0x00007FFA7CAD3000-0x00007FFA7CAD5000-memory.dmp

Filesize
8KB

Download
memory/3336-1-0x0000000000530000-0x0000000000544000-memory.dmp

Filesize
80KB

Download