xworm | 57b3c6691f0c7cd0b001b6a2b1ff318cedc586ce042641b46befe3f4e5b9c765

General

Target

XClient.exe
Size

68KB
MD5

7211f73e408ec41e11fdbb85880d8c1e
SHA1

6a8a1453153de5df5ce622cad3e0a174082763e5
SHA256

57b3c6691f0c7cd0b001b6a2b1ff318cedc586ce042641b46befe3f4e5b9c765
SHA512

de3d0978acfd451c060ebd4f9cb1591c12d554048b21dd2cbf9dbfc4391a44337abf800e44b953726168ad5389536d30d4ec19c38603df24d695ec90b3403aa9
SSDEEP

1536:43JtaTWQlhe+u91ngXJseUcDw+bHab7gl56j3Om7KRv:45taTWqhe7TngXGDcDw+bHavglA3Om7S

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

C2

26.51.16.201:45737

Attributes

install_file
client.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/2820-1-0x0000000000680000-0x0000000000698000-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 2 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
872	powershell.exe
4408	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-1-5-21-3181990009-820930284-137514597-1000\Control Panel\International\Geo\Nation	XClient.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
872	powershell.exe
872	powershell.exe
4408	powershell.exe
4408	powershell.exe
2820	XClient.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2820	XClient.exe
Token: SeDebugPrivilege	872	powershell.exe
Token: SeDebugPrivilege	4408	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2820	XClient.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2820 wrote to memory of 872	2820	XClient.exe	91
PID 2820 wrote to memory of 872	2820	XClient.exe	91
PID 2820 wrote to memory of 4408	2820	XClient.exe	93
PID 2820 wrote to memory of 4408	2820	XClient.exe	93

C:\Users\Admin\AppData\Local\Temp\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2820
- 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⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:872
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4408

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
d28a889fd956d5cb3accfbaf1143eb6f

SHA1
157ba54b365341f8ff06707d996b3635da8446f7

SHA256
21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

SHA512
0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ajva1jhh.o3w.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/872-11-0x000001242D050000-0x000001242D072000-memory.dmp

Filesize
136KB

Download
memory/872-12-0x00007FF97C070000-0x00007FF97CB31000-memory.dmp

Filesize
10.8MB

Download
memory/872-13-0x00007FF97C070000-0x00007FF97CB31000-memory.dmp

Filesize
10.8MB

Download
memory/872-14-0x00007FF97C070000-0x00007FF97CB31000-memory.dmp

Filesize
10.8MB

Download
memory/872-17-0x00007FF97C070000-0x00007FF97CB31000-memory.dmp

Filesize
10.8MB

Download
memory/2820-0-0x00007FF97C073000-0x00007FF97C075000-memory.dmp

Filesize
8KB

Download
memory/2820-1-0x0000000000680000-0x0000000000698000-memory.dmp

Filesize
96KB

Download
memory/2820-30-0x00007FF97C070000-0x00007FF97CB31000-memory.dmp

Filesize
10.8MB

Download
memory/2820-31-0x00007FF97C073000-0x00007FF97C075000-memory.dmp

Filesize
8KB

Download
memory/2820-32-0x00007FF97C070000-0x00007FF97CB31000-memory.dmp

Filesize
10.8MB

Download

Analysis

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