xworm | ad34f6a17ee318591b59ac4fbc300c53808630e4f163b644a58eadc85057348a

General

Target

NetCat Loader.exe
Size

76KB
MD5

1a56b39b62cff3bf7a75a708f6a11762
SHA1

180d91a57ebb95a81bfaa394bca35c123efa916e
SHA256

ad34f6a17ee318591b59ac4fbc300c53808630e4f163b644a58eadc85057348a
SHA512

b86dfa4287e283fd7e734cc3897589c2bb6b98e35f1c82a6ab50f271baf8a9748a125a6c04425ccdf93566ddacb453290a9a63e5fc0d2797b70fb70b6dac03fb
SSDEEP

1536:JqDtM7DwroXh9bSQ6/jyrV9nmRWnXzWb6Alyj:EwblSlryrV9nmwPeyj

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

C2

194.59.31.87:1111

Attributes

install_file
USB.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral3/files/0x000b000000023cb6-6.dat	family_xworm
behavioral3/memory/1164-15-0x0000000000F50000-0x0000000000F66000-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
1020	powershell.exe
4924	powershell.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	NetCat Loader.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	System32.exe

Executes dropped EXE 1 IoCs

pid	Process
1164	System32.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
14	ip-api.com

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000_Classes\Local Settings	NetCat Loader.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1164	System32.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1020	powershell.exe
1020	powershell.exe
4924	powershell.exe
4924	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1164	System32.exe
Token: SeDebugPrivilege	1020	powershell.exe
Token: SeDebugPrivilege	4924	powershell.exe
Token: SeDebugPrivilege	1164	System32.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2300 wrote to memory of 1164	2300	NetCat Loader.exe	83
PID 2300 wrote to memory of 1164	2300	NetCat Loader.exe	83
PID 2300 wrote to memory of 804	2300	NetCat Loader.exe	84
PID 2300 wrote to memory of 804	2300	NetCat Loader.exe	84
PID 1164 wrote to memory of 1020	1164	System32.exe	87
PID 1164 wrote to memory of 1020	1164	System32.exe	87
PID 1164 wrote to memory of 4924	1164	System32.exe	89
PID 1164 wrote to memory of 4924	1164	System32.exe	89

C:\Users\Admin\AppData\Local\Temp\NetCat Loader.exe
"C:\Users\Admin\AppData\Local\Temp\NetCat Loader.exe"
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2300
- C:\Users\Admin\AppData\Roaming\System32.exe
  "C:\Users\Admin\AppData\Roaming\System32.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1164
- - 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\System32.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1020
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'System32.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4924
- C:\Windows\system32\NOTEPAD.EXE
  "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\Thanks For Using.txt
  2⤵
  PID:804

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

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
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_zavoznju.eed.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\System32.exe

Filesize
63KB

MD5
66bbe5829a613fedad7f79e2c6273448

SHA1
57314396a65e08b7bfc5f0b8cdfa9a050579d9d9

SHA256
72499a032c26ef7031b942590e4dd2e28d60b332620c7d2dc42bc4b70995e0dd

SHA512
9b0ea0bb6a4a6ae75c6463f2bc3b5bd012a40a89f491868979230b850b948240b40326c703211edd349911e97a218bf77d01d06f254c33d83939c21a152efae3

Download Submit
C:\Users\Admin\AppData\Roaming\Thanks For Using.txt

Filesize
57B

MD5
f9cfd0c4da0a9a068f8a26ee31c85036

SHA1
ea75b71cfdf7364eacfafcaac0421f9c80a2b4e5

SHA256
e52f33ee65ceb7e5fe9cd47744888c089c37ba7dbadeaf345e75b5cadd43ee2d

SHA512
f81823ed92d8f5aa299d0164f59fb77a3af4c6a9ca5a98e0d4b33104ec7f15ef19037d4bb4f3b2c8c1ca156bac2253f5052eb801468db73d71a67b10405e4b51

Download Submit
memory/1020-20-0x0000020BBB640000-0x0000020BBB662000-memory.dmp

Filesize
136KB

Download
memory/1164-15-0x0000000000F50000-0x0000000000F66000-memory.dmp

Filesize
88KB

Download
memory/1164-19-0x00007FFCC0720000-0x00007FFCC11E1000-memory.dmp

Filesize
10.8MB

Download
memory/1164-18-0x00007FFCC0720000-0x00007FFCC11E1000-memory.dmp

Filesize
10.8MB

Download
memory/1164-44-0x00007FFCC0720000-0x00007FFCC11E1000-memory.dmp

Filesize
10.8MB

Download
memory/1164-45-0x00007FFCC0720000-0x00007FFCC11E1000-memory.dmp

Filesize
10.8MB

Download
memory/2300-0-0x00007FFCC0723000-0x00007FFCC0725000-memory.dmp

Filesize
8KB

Download
memory/2300-1-0x00000000009A0000-0x00000000009BA000-memory.dmp

Filesize
104KB

Download

Analysis

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