xworm | 244db0aad5271d5d5ce245acb02c0856673f7dcefcccd65007b7fc604dcda570

General

Target

Item Specifications.exe
Size

1.3MB
MD5

5e8c689ae7f342a2b2dcf76ad9f990d4
SHA1

dc659d8c8284c0ec2d5cd4b0c4dd3a250d481331
SHA256

b2e9b488e12360fc455512ddae99dba10dd455df423853875e89ac1ffbdd06be
SHA512

46bd683b51c45cc92d5b35c236d8e339ab808cd87465eebd7f1a96ccdb28f994e0048a185a46a68dfd106e6fdd6e46a75c85caea180c03ac20ca2e3e778e64c9
SSDEEP

12288:0kjmrocDPyNhuTsAGBDNMrRbeyBYidXG4LrXFb2N:0ZbPyNqsAwyFCreDJKN

Score

10^/10

xworm discovery execution rat trojan

Malware Config

Extracted

Family

xworm

Version

3.1

C2

savelat19847.duckdns.org:7000

Mutex

6FO7gyeQQmt4IGRZ

Attributes

install_file
USB.exe

aes.plain

Signatures

Detect Xworm Payload 5 IoCs

resource	yara_rule
behavioral1/memory/2520-7-0x0000000000400000-0x000000000040E000-memory.dmp	family_xworm
behavioral1/memory/2520-6-0x0000000000400000-0x000000000040E000-memory.dmp	family_xworm
behavioral1/memory/2520-9-0x0000000000400000-0x000000000040E000-memory.dmp	family_xworm
behavioral1/memory/2520-13-0x0000000000400000-0x000000000040E000-memory.dmp	family_xworm
behavioral1/memory/2520-11-0x0000000000400000-0x000000000040E000-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
2864	powershell.exe
2840	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3056 set thread context of 2520	3056	Item Specifications.exe	30

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	CasPol.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2864	powershell.exe
2840	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2520	CasPol.exe
Token: SeDebugPrivilege	2864	powershell.exe
Token: SeDebugPrivilege	2840	powershell.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 3056 wrote to memory of 2520	3056	Item Specifications.exe	30
PID 3056 wrote to memory of 2520	3056	Item Specifications.exe	30
PID 3056 wrote to memory of 2520	3056	Item Specifications.exe	30
PID 3056 wrote to memory of 2520	3056	Item Specifications.exe	30
PID 3056 wrote to memory of 2520	3056	Item Specifications.exe	30
PID 3056 wrote to memory of 2520	3056	Item Specifications.exe	30
PID 3056 wrote to memory of 2520	3056	Item Specifications.exe	30
PID 3056 wrote to memory of 2520	3056	Item Specifications.exe	30
PID 3056 wrote to memory of 2520	3056	Item Specifications.exe	30
PID 3056 wrote to memory of 2984	3056	Item Specifications.exe	31
PID 3056 wrote to memory of 2984	3056	Item Specifications.exe	31
PID 3056 wrote to memory of 2984	3056	Item Specifications.exe	31
PID 2520 wrote to memory of 2864	2520	CasPol.exe	32
PID 2520 wrote to memory of 2864	2520	CasPol.exe	32
PID 2520 wrote to memory of 2864	2520	CasPol.exe	32
PID 2520 wrote to memory of 2864	2520	CasPol.exe	32
PID 2520 wrote to memory of 2840	2520	CasPol.exe	34
PID 2520 wrote to memory of 2840	2520	CasPol.exe	34
PID 2520 wrote to memory of 2840	2520	CasPol.exe	34
PID 2520 wrote to memory of 2840	2520	CasPol.exe	34

C:\Users\Admin\AppData\Local\Temp\Item Specifications.exe
"C:\Users\Admin\AppData\Local\Temp\Item Specifications.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3056
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2520
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2864
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'CasPol.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2840
- C:\Windows\system32\WerFault.exe
  C:\Windows\system32\WerFault.exe -u -p 3056 -s 660
  2⤵
  PID:2984

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

Filesize
7KB

MD5
d5b535379772bb6090fd1d23faa81389

SHA1
ac1f6e66df79ee3b9729a1173ac99b21fed50457

SHA256
6b6de23e4e944f15bfeb2b7a721c1bc30f28e01731787562a66dcf682978c38a

SHA512
208ce5107e6f8585706bc447b39563ba9fe88aba24a9d1a65781c5c5e7c5b84a22e033b822237c69a7d021050c33bad92a636e49d880c9492de332cc00ed5df9

Download Submit
memory/2520-9-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2520-13-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2520-25-0x0000000074720000-0x0000000074E0E000-memory.dmp

Filesize
6.9MB

Download
memory/2520-4-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2520-7-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2520-6-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2520-5-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2520-24-0x000000007472E000-0x000000007472F000-memory.dmp

Filesize
4KB

Download
memory/2520-22-0x0000000074720000-0x0000000074E0E000-memory.dmp

Filesize
6.9MB

Download
memory/2520-11-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2520-8-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2520-14-0x000000007472E000-0x000000007472F000-memory.dmp

Filesize
4KB

Download
memory/3056-1-0x0000000000FA0000-0x0000000000FA8000-memory.dmp

Filesize
32KB

Download
memory/3056-2-0x000007FEF58B0000-0x000007FEF629C000-memory.dmp

Filesize
9.9MB

Download
memory/3056-23-0x000007FEF58B0000-0x000007FEF629C000-memory.dmp

Filesize
9.9MB

Download
memory/3056-0-0x000007FEF58B3000-0x000007FEF58B4000-memory.dmp

Filesize
4KB

Download
memory/3056-3-0x0000000000660000-0x00000000006C0000-memory.dmp

Filesize
384KB

Download

Analysis

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