xworm | feba3474a30f9b010741c34ee4773777fc329390418713ffef424b2eb9243a5f

General

Target

feba3474a30f9b010741c34ee4773777fc329390418713ffef424b2eb9243a5f.exe
Size

40KB
MD5

3ab61ee8a81099edddf87af587420a10
SHA1

d6c0f6f60d13cc786cf7ac0df2c45b5dc47b945c
SHA256

feba3474a30f9b010741c34ee4773777fc329390418713ffef424b2eb9243a5f
SHA512

f43326c79ea8bd118fd90efc8c2c8306e02901727ffd7c6666b2a35820eb8799976007f4886a68a7f411509ad61dcf7ddf5a3630fa5342014ad5aa978818ff3f
SSDEEP

768:pNfPMSk3K/EzTb/008WuFZ4ZJF5PC9O9Fy68OMhi3/aV:nf05a/CTjp89IFc9Uc68OMsi

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

154.197.69.165:7000

Mutex

jcTVbnlMjCEJAYCp

Attributes

Install_directory
%AppData%
install_file
crss.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/4852-1-0x00000000001C0000-0x00000000001D0000-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
4844	powershell.exe
744	powershell.exe
4360	powershell.exe
3968	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-1-5-21-656926755-4116854191-210765258-1000\Control Panel\International\Geo\Nation	feba3474a30f9b010741c34ee4773777fc329390418713ffef424b2eb9243a5f.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\crss.lnk	feba3474a30f9b010741c34ee4773777fc329390418713ffef424b2eb9243a5f.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\crss.lnk	feba3474a30f9b010741c34ee4773777fc329390418713ffef424b2eb9243a5f.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
23	ip-api.com

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
3968	powershell.exe
3968	powershell.exe
4844	powershell.exe
4844	powershell.exe
744	powershell.exe
744	powershell.exe
4360	powershell.exe
4360	powershell.exe
4852	feba3474a30f9b010741c34ee4773777fc329390418713ffef424b2eb9243a5f.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	4852	feba3474a30f9b010741c34ee4773777fc329390418713ffef424b2eb9243a5f.exe
Token: SeDebugPrivilege	3968	powershell.exe
Token: SeDebugPrivilege	4844	powershell.exe
Token: SeDebugPrivilege	744	powershell.exe
Token: SeDebugPrivilege	4360	powershell.exe
Token: SeDebugPrivilege	4852	feba3474a30f9b010741c34ee4773777fc329390418713ffef424b2eb9243a5f.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4852	feba3474a30f9b010741c34ee4773777fc329390418713ffef424b2eb9243a5f.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4852 wrote to memory of 3968	4852	feba3474a30f9b010741c34ee4773777fc329390418713ffef424b2eb9243a5f.exe	92
PID 4852 wrote to memory of 3968	4852	feba3474a30f9b010741c34ee4773777fc329390418713ffef424b2eb9243a5f.exe	92
PID 4852 wrote to memory of 4844	4852	feba3474a30f9b010741c34ee4773777fc329390418713ffef424b2eb9243a5f.exe	94
PID 4852 wrote to memory of 4844	4852	feba3474a30f9b010741c34ee4773777fc329390418713ffef424b2eb9243a5f.exe	94
PID 4852 wrote to memory of 744	4852	feba3474a30f9b010741c34ee4773777fc329390418713ffef424b2eb9243a5f.exe	96
PID 4852 wrote to memory of 744	4852	feba3474a30f9b010741c34ee4773777fc329390418713ffef424b2eb9243a5f.exe	96
PID 4852 wrote to memory of 4360	4852	feba3474a30f9b010741c34ee4773777fc329390418713ffef424b2eb9243a5f.exe	98
PID 4852 wrote to memory of 4360	4852	feba3474a30f9b010741c34ee4773777fc329390418713ffef424b2eb9243a5f.exe	98

C:\Users\Admin\AppData\Local\Temp\feba3474a30f9b010741c34ee4773777fc329390418713ffef424b2eb9243a5f.exe
"C:\Users\Admin\AppData\Local\Temp\feba3474a30f9b010741c34ee4773777fc329390418713ffef424b2eb9243a5f.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4852
- 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\feba3474a30f9b010741c34ee4773777fc329390418713ffef424b2eb9243a5f.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3968
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'feba3474a30f9b010741c34ee4773777fc329390418713ffef424b2eb9243a5f.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4844
- 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\crss.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:744
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'crss.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4360

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

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
bd5940f08d0be56e65e5f2aaf47c538e

SHA1
d7e31b87866e5e383ab5499da64aba50f03e8443

SHA256
2d2f364c75bd2897504249f42cdf1d19374f5230aad68fa9154ea3d03e3031a6

SHA512
c34d10c7e07da44a180fae9889b61f08903aa84e8ddfa80c31c272b1ef9d491b8cec6b8a4c836c3cb1583fe8f4955c6a8db872515de3a9e10eae09610c959406

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

Filesize
944B

MD5
15dde0683cd1ca19785d7262f554ba93

SHA1
d039c577e438546d10ac64837b05da480d06bf69

SHA256
d6fa39eab7ee36f44dc3f9f2839d098433db95c1eba924e4bcf4e5c0d268d961

SHA512
57c0e1b87bc1c136f0d39f3ce64bb8f8274a0491e4ca6e45e5c7f9070aa9d9370c6f590ce37cd600b252df2638d870205249a514c43245ca7ed49017024a4672

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

Filesize
944B

MD5
50d3033f2bc3a3774c469d03e71a79a9

SHA1
22027b1d52085de99b3bffa276530fea5d961471

SHA256
2987e99ec7fa17bd4ab7de3cb4dc62645e1052012a5a357904d6fc6db9054147

SHA512
ecf7ab1a9e4192454a3e24c60453fd702a8c648e00078fc933b9182f4a3d3c10c6f5da622a5729b35727e6ddc8837029caddcaf76f56e805b9744253b56da5d8

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_fw2qeotu.ozp.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3968-10-0x000002B2CAF50000-0x000002B2CAF72000-memory.dmp

Filesize
136KB

Download
memory/3968-14-0x00007FF9A8980000-0x00007FF9A9441000-memory.dmp

Filesize
10.8MB

Download
memory/3968-15-0x00007FF9A8980000-0x00007FF9A9441000-memory.dmp

Filesize
10.8MB

Download
memory/3968-18-0x00007FF9A8980000-0x00007FF9A9441000-memory.dmp

Filesize
10.8MB

Download
memory/3968-11-0x00007FF9A8980000-0x00007FF9A9441000-memory.dmp

Filesize
10.8MB

Download
memory/4852-0-0x00007FF9A8983000-0x00007FF9A8985000-memory.dmp

Filesize
8KB

Download
memory/4852-2-0x00007FF9A8980000-0x00007FF9A9441000-memory.dmp

Filesize
10.8MB

Download
memory/4852-1-0x00000000001C0000-0x00000000001D0000-memory.dmp

Filesize
64KB

Download
memory/4852-57-0x00007FF9A8983000-0x00007FF9A8985000-memory.dmp

Filesize
8KB

Download
memory/4852-58-0x00007FF9A8980000-0x00007FF9A9441000-memory.dmp

Filesize
10.8MB

Download

Analysis

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