xworm | 250faa1e494e594e8faad0cebcd8d2b1d63f9bc5ddfd8ac6f143a98f8ed9980e

General

Target

XClient.exe
Size

153KB
MD5

1b8820d52554249471ca92c6db6d7e73
SHA1

8b72f08f4c07c2011d42bcdb3cb8299ddceaa16b
SHA256

250faa1e494e594e8faad0cebcd8d2b1d63f9bc5ddfd8ac6f143a98f8ed9980e
SHA512

bfd0864ca829913b66739fe3194e606e7795e8a55ec1da57b79f273f318795d9d41bd6881e5f9e418d4a1fc7481a64ed5728f171a956ebaa2aeb6aaa43208df3
SSDEEP

1536:6UEv+qFIUkzEabbECePsbgoggTLcGu4f069liHbOBPBbyVspJxqmyVttdGFQeOPu:mHpkzFbwCekbgL2+OBPBmVIrqmyBer

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%AppData%
install_file
XClient.exe
pastebin_url
https://pastebin.com/raw/PG3MaVGP

Signatures

Detect Xworm Payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1416-0-0x0000000000D00000-0x0000000000D2C000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm

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

Processes:

XClient.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2818691465-3043947619-2475182763-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

Processes:

XClient.exe

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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

XClient.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2818691465-3043947619-2475182763-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	XClient.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 8 IoCs

Web Service
T1102

Processes:

flow ioc

6 pastebin.com
14 pastebin.com
15 pastebin.com
16 pastebin.com
17 pastebin.com
18 pastebin.com
19 pastebin.com
20 pastebin.com
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

3 ip-api.com
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

flow	ioc
6	pastebin.com
14	pastebin.com
15	pastebin.com
16	pastebin.com
17	pastebin.com
18	pastebin.com
19	pastebin.com
20	pastebin.com

flow	ioc
3	ip-api.com

Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

powershell.exepowershell.exepowershell.exepowershell.exe

pid	process
2096	powershell.exe
2096	powershell.exe
1984	powershell.exe
1984	powershell.exe
4488	powershell.exe
4488	powershell.exe
4480	powershell.exe
4480	powershell.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

XClient.exepowershell.exepowershell.exepowershell.exepowershell.exe

description	pid	process
Token: SeDebugPrivilege	1416	XClient.exe
Token: SeDebugPrivilege	2096	powershell.exe
Token: SeDebugPrivilege	1984	powershell.exe
Token: SeDebugPrivilege	4488	powershell.exe
Token: SeDebugPrivilege	4480	powershell.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

XClient.exe

description	pid	process	target process
PID 1416 wrote to memory of 2096	1416	XClient.exe	powershell.exe
PID 1416 wrote to memory of 2096	1416	XClient.exe	powershell.exe
PID 1416 wrote to memory of 1984	1416	XClient.exe	powershell.exe
PID 1416 wrote to memory of 1984	1416	XClient.exe	powershell.exe
PID 1416 wrote to memory of 4488	1416	XClient.exe	powershell.exe
PID 1416 wrote to memory of 4488	1416	XClient.exe	powershell.exe
PID 1416 wrote to memory of 4480	1416	XClient.exe	powershell.exe
PID 1416 wrote to memory of 4480	1416	XClient.exe	powershell.exe

C:\Users\Admin\AppData\Local\Temp\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1416
- 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\XClient.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2096
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1984
- 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\XClient.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4488
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4480

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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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
1076d13c33069781e0c96a74b2b64d1f

SHA1
56b274c368728fd987a2ccc582bdd32ccf3c4738

SHA256
83a029666efcdbcfd04f4e77a015ae5c88416507ec75cc0e71979048f4566a95

SHA512
401439f09d69c831ff43775632b532a55fb1ea86a30fea767376792c23704ff61965ce9215fa90684d84da7f64d697a13ef9f814efa8bd3734733a58f089931f

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

Filesize
944B

MD5
60945d1a2e48da37d4ce8d9c56b6845a

SHA1
83e80a6acbeb44b68b0da00b139471f428a9d6c1

SHA256
314b91c00997034d6e015f40230d90ebbf57de5dc938b62c1a214d591793dbe3

SHA512
5d068f1d6443e26ae3cad1c80f969e50e5860967b314153c4d3b6efd1cfa39f0907c6427bec7fa43db079f258b6357e4e9a1b0b1a36b1481d2049ea0e67909ed

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

Filesize
944B

MD5
dd1d0b083fedf44b482a028fb70b96e8

SHA1
dc9c027937c9f6d52268a1504cbae42a39c8d36a

SHA256
cab7944d29e0501dc0db904ac460ca7a87700e0ec7eb62298b7b97cbf40c424c

SHA512
96bec38bfda176292ae65dcf735103e7888baa212038737c1d1e215fcb76e4c0355e4a827a1934303e7aecae91012fa412f13e38f382b732758bae985cc67973

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_t4w5y141.eup.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1416-1-0x00007FFFD2E50000-0x00007FFFD3911000-memory.dmp

Filesize
10.8MB

Download
memory/1416-2-0x000000001BB00000-0x000000001BB10000-memory.dmp

Filesize
64KB

Download
memory/1416-59-0x000000001BB00000-0x000000001BB10000-memory.dmp

Filesize
64KB

Download
memory/1416-0-0x0000000000D00000-0x0000000000D2C000-memory.dmp

Filesize
176KB

Download
memory/1416-54-0x00007FFFD2E50000-0x00007FFFD3911000-memory.dmp

Filesize
10.8MB

Download
memory/2096-5-0x000002619B7B0000-0x000002619B7C0000-memory.dmp

Filesize
64KB

Download
memory/2096-19-0x00007FFFD2E50000-0x00007FFFD3911000-memory.dmp

Filesize
10.8MB

Download
memory/2096-16-0x000002619B7B0000-0x000002619B7C0000-memory.dmp

Filesize
64KB

Download
memory/2096-4-0x000002619B7B0000-0x000002619B7C0000-memory.dmp

Filesize
64KB

Download
memory/2096-6-0x00000261B3CB0000-0x00000261B3CD2000-memory.dmp

Filesize
136KB

Download
memory/2096-3-0x00007FFFD2E50000-0x00007FFFD3911000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads