xworm | e55752ce0e4bdc9426430bf580efd1559864d24c3c0f118d58ff513e6d618fd1

Analysis

max time kernel
147s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240704-en
resource tags

arch:x64arch:x86image:win10v2004-20240704-enlocale:en-usos:windows10-2004-x64system
submitted
07/07/2024, 03:20

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General

Target

bin/release/release.exe
Size

64KB
MD5

36969de6b4bf8de24684de1bb71f624f
SHA1

0327d7d9d7f739e4b09bab680249ed997a281c9b
SHA256

57035572212814c4666994f1a0d2b6955b0951a8f1e9e1686dead895de5f64cf
SHA512

cd8eae1b19c8ae9a2d22b999e85e86625a1e74630e6f3155ff63965b8f116e62f79dcc23b88c92f51fa42ee26f7bd87cad22a21f32f16306890576e309dfe548
SSDEEP

1536:TTodvW06WoBsscJSbigiYUVkaNW6PmqCO26erLq:UenWissBbigHmkaRmHO26erLq

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

79.110.49.233:4444

Attributes

Install_directory
%AppData%
install_file
VSREDIST.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral8/memory/3220-1-0x0000000000680000-0x0000000000696000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat 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
2836	powershell.exe
4164	powershell.exe
2872	powershell.exe
2380	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-1-5-21-587429654-1855694383-2268796072-1000\Control Panel\International\Geo\Nation	release.exe

Drops startup file 2 IoCs

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

Loads dropped DLL 1 IoCs

pid	Process
3220	release.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-1-5-21-587429654-1855694383-2268796072-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\VSREDIST = "C:\\Users\\Admin\\AppData\\Roaming\\VSREDIST.exe"	release.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
15	ip-api.com

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

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	release.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	release.exe

Enumerates system info in registry 2 TTPs 4 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\BIOSVersion	release.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\BIOSReleaseDate	release.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemProductName	release.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS	release.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2836	powershell.exe
2836	powershell.exe
4164	powershell.exe
4164	powershell.exe
2872	powershell.exe
2872	powershell.exe
2380	powershell.exe
2380	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	3220	release.exe
Token: SeDebugPrivilege	2836	powershell.exe
Token: SeDebugPrivilege	4164	powershell.exe
Token: SeDebugPrivilege	2872	powershell.exe
Token: SeDebugPrivilege	2380	powershell.exe
Token: SeDebugPrivilege	3220	release.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3220 wrote to memory of 2836	3220	release.exe	86
PID 3220 wrote to memory of 2836	3220	release.exe	86
PID 3220 wrote to memory of 4164	3220	release.exe	88
PID 3220 wrote to memory of 4164	3220	release.exe	88
PID 3220 wrote to memory of 2872	3220	release.exe	90
PID 3220 wrote to memory of 2872	3220	release.exe	90
PID 3220 wrote to memory of 2380	3220	release.exe	92
PID 3220 wrote to memory of 2380	3220	release.exe	92

C:\Users\Admin\AppData\Local\Temp\bin\release\release.exe
"C:\Users\Admin\AppData\Local\Temp\bin\release\release.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Loads dropped DLL
- Adds Run key to start application
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3220
- 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\bin\release\release.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2836
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'release.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4164
- 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\VSREDIST.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2872
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'VSREDIST.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2380

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

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
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
944B

MD5
2e907f77659a6601fcc408274894da2e

SHA1
9f5b72abef1cd7145bf37547cdb1b9254b4efe9d

SHA256
385da35673330e21ac02545220552fe301fe54dedefbdafc097ac4342a295233

SHA512
34fa0fff24f6550f55f828541aaefe5d75c86f8f0842d54b50065e9746f9662bb7209c74c9a9571540b9855bb3851f01db613190024e89b198d485bb5dc07721

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

Filesize
944B

MD5
8ea938a6f1242fac3a9a747689600474

SHA1
8d37edbda5f628029766d276ff45eaf58e381f2e

SHA256
657561ece58b69dcefdbf798aca86d7deab63baf9fa134d6fa1c41065f60b6a4

SHA512
8bde9c1d717df14a71fed4e989615b84d6c6056d24dd7258cbe082777cb26c27b5563864b2f6e5df925980da1dac879eaaf347d0573fb34e6bff6a8a58d2fb1d

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

Filesize
944B

MD5
07a771c4f31f62b2d04e2befaa36dce7

SHA1
662952ede6c1acbb575e8149a5ac2f08edade811

SHA256
a2df2570980e1123d9af8e12a27a82d3a4d332f0e7dd44e4e225743207c099b3

SHA512
9e339a2d0bfaf5bbe5252f69061652c5880fe1233930830ca7190a65516366e05129907b1656a6790c0093ad82ac73ddee6738d0b78ecb1e3d888f467b889fe9

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_oabxjayl.dmo.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp911F.tmp

Filesize
100KB

MD5
1b942faa8e8b1008a8c3c1004ba57349

SHA1
cd99977f6c1819b12b33240b784ca816dfe2cb91

SHA256
555ccb7ecd9ae52a75135fdd81ab443a49d5785b0621ed6468d28c4234e46ccc

SHA512
5aee3d59478d41ddd5885c99b394c9c4983064e2b3528db1a3f7fc289662bced4f57d072517bbe7573c6d1789435e987ef1aa9cc91f372bcfd30bc016675fa43

Download Submit
memory/2836-9-0x0000017EC8930000-0x0000017EC8952000-memory.dmp

Filesize
136KB

Download
memory/2836-15-0x00007FF944FB0000-0x00007FF945A71000-memory.dmp

Filesize
10.8MB

Download
memory/2836-18-0x00007FF944FB0000-0x00007FF945A71000-memory.dmp

Filesize
10.8MB

Download
memory/2836-14-0x00007FF944FB0000-0x00007FF945A71000-memory.dmp

Filesize
10.8MB

Download
memory/2836-10-0x00007FF944FB0000-0x00007FF945A71000-memory.dmp

Filesize
10.8MB

Download
memory/3220-0-0x00007FF944FB3000-0x00007FF944FB5000-memory.dmp

Filesize
8KB

Download
memory/3220-2-0x00007FF944FB0000-0x00007FF945A71000-memory.dmp

Filesize
10.8MB

Download
memory/3220-57-0x00007FF944FB3000-0x00007FF944FB5000-memory.dmp

Filesize
8KB

Download
memory/3220-58-0x00007FF944FB0000-0x00007FF945A71000-memory.dmp

Filesize
10.8MB

Download
memory/3220-59-0x0000000002710000-0x000000000271C000-memory.dmp

Filesize
48KB

Download
memory/3220-60-0x000000001E330000-0x000000001E858000-memory.dmp

Filesize
5.2MB

Download
memory/3220-62-0x0000000000E10000-0x0000000000E4A000-memory.dmp

Filesize
232KB

Download
memory/3220-1-0x0000000000680000-0x0000000000696000-memory.dmp

Filesize
88KB

Download