xworm | 233b4e09ce8f93d5b8d05fe966b6dee0e8f72a4b044c1f81cb76ab38c840ce7e

General

Target

NerestCrack.exe
Size

15.0MB
MD5

8acd2d51225c26977b7a6c05133b5d0e
SHA1

f7e78fced38d5cf695a1fc5babbc0087e4c82682
SHA256

233b4e09ce8f93d5b8d05fe966b6dee0e8f72a4b044c1f81cb76ab38c840ce7e
SHA512

71e679fda369fbbf169892c9cfca555bc5d4746292fc78f4207f15ef041bcb7f67a46061688e5dfc2bda3dba54cc064e84c652b58bef1e4114a4dedf03161662
SSDEEP

3072:1jx5U/FRxkan+bgVkvQ2rObGUzaewwQU4OHRemS0:Bx5iWa+b5IjzBuU4OIm

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:30067

florida-leather.gl.at.ply.gg:30067

than-behavioral.gl.at.ply.gg:30067

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/1412-1-0x0000000000AE0000-0x0000000000B02000-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
4872	powershell.exe
4692	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-1-5-21-100612193-3312047696-905266872-1000\Control Panel\International\Geo\Nation	NerestCrack.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
4872	powershell.exe
4872	powershell.exe
4692	powershell.exe
4692	powershell.exe
1412	NerestCrack.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1412	NerestCrack.exe
Token: SeDebugPrivilege	4872	powershell.exe
Token: SeDebugPrivilege	4692	powershell.exe
Token: SeDebugPrivilege	1412	NerestCrack.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1412	NerestCrack.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1412 wrote to memory of 4872	1412	NerestCrack.exe	95
PID 1412 wrote to memory of 4872	1412	NerestCrack.exe	95
PID 1412 wrote to memory of 4692	1412	NerestCrack.exe	97
PID 1412 wrote to memory of 4692	1412	NerestCrack.exe	97

C:\Users\Admin\AppData\Local\Temp\NerestCrack.exe
"C:\Users\Admin\AppData\Local\Temp\NerestCrack.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1412
- 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\NerestCrack.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4872
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'NerestCrack.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4692

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
3a6bad9528f8e23fb5c77fbd81fa28e8

SHA1
f127317c3bc6407f536c0f0600dcbcf1aabfba36

SHA256
986366767de5873f1b170a63f2a33ce05132d1afd90c8f5017afbca8ef1beb05

SHA512
846002154a0ece6f3e9feda6f115d3161dc21b3789525dd62ae1d9188495171293efdbe7be4710666dd8a15e66b557315b5a02918a741ed1d5f3ff0c515b98e2

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_aiyms40o.ymx.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1412-0-0x00007FFB9C493000-0x00007FFB9C495000-memory.dmp

Filesize
8KB

Download
memory/1412-1-0x0000000000AE0000-0x0000000000B02000-memory.dmp

Filesize
136KB

Download
memory/1412-30-0x00007FFB9C490000-0x00007FFB9CF51000-memory.dmp

Filesize
10.8MB

Download
memory/1412-31-0x00007FFB9C490000-0x00007FFB9CF51000-memory.dmp

Filesize
10.8MB

Download
memory/4872-2-0x000002096B860000-0x000002096B882000-memory.dmp

Filesize
136KB

Download
memory/4872-12-0x00007FFB9C490000-0x00007FFB9CF51000-memory.dmp

Filesize
10.8MB

Download
memory/4872-13-0x00007FFB9C490000-0x00007FFB9CF51000-memory.dmp

Filesize
10.8MB

Download
memory/4872-14-0x00007FFB9C490000-0x00007FFB9CF51000-memory.dmp

Filesize
10.8MB

Download
memory/4872-17-0x00007FFB9C490000-0x00007FFB9CF51000-memory.dmp

Filesize
10.8MB

Download

Analysis

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