xworm | b2e9b488e12360fc455512ddae99dba10dd455df423853875e89ac1ffbdd06be

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/2696-10-0x0000000000400000-0x000000000040E000-memory.dmp	family_xworm
behavioral1/memory/2696-8-0x0000000000400000-0x000000000040E000-memory.dmp	family_xworm
behavioral1/memory/2696-13-0x0000000000400000-0x000000000040E000-memory.dmp	family_xworm
behavioral1/memory/2696-15-0x0000000000400000-0x000000000040E000-memory.dmp	family_xworm
behavioral1/memory/2696-17-0x0000000000400000-0x000000000040E000-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
2768	powershell.exe
2896	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1192 set thread context of 2696	1192	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	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	CasPol.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2768	powershell.exe
2896	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2696	CasPol.exe
Token: SeDebugPrivilege	2768	powershell.exe
Token: SeDebugPrivilege	2896	powershell.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1192 wrote to memory of 2696	1192	Item Specifications.exe	30
PID 1192 wrote to memory of 2696	1192	Item Specifications.exe	30
PID 1192 wrote to memory of 2696	1192	Item Specifications.exe	30
PID 1192 wrote to memory of 2696	1192	Item Specifications.exe	30
PID 1192 wrote to memory of 2696	1192	Item Specifications.exe	30
PID 1192 wrote to memory of 2696	1192	Item Specifications.exe	30
PID 1192 wrote to memory of 2696	1192	Item Specifications.exe	30
PID 1192 wrote to memory of 2696	1192	Item Specifications.exe	30
PID 1192 wrote to memory of 2696	1192	Item Specifications.exe	30
PID 1192 wrote to memory of 1724	1192	Item Specifications.exe	31
PID 1192 wrote to memory of 1724	1192	Item Specifications.exe	31
PID 1192 wrote to memory of 1724	1192	Item Specifications.exe	31
PID 2696 wrote to memory of 2768	2696	CasPol.exe	32
PID 2696 wrote to memory of 2768	2696	CasPol.exe	32
PID 2696 wrote to memory of 2768	2696	CasPol.exe	32
PID 2696 wrote to memory of 2768	2696	CasPol.exe	32
PID 2696 wrote to memory of 2896	2696	CasPol.exe	34
PID 2696 wrote to memory of 2896	2696	CasPol.exe	34
PID 2696 wrote to memory of 2896	2696	CasPol.exe	34
PID 2696 wrote to memory of 2896	2696	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:1192
- 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:2696
- - 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:2768
- - 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:2896
- C:\Windows\system32\WerFault.exe
  C:\Windows\system32\WerFault.exe -u -p 1192 -s 656
  2⤵
  PID:1724

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
f4da60437154e9487b4a52fdd9c4cf19

SHA1
bf5dc5376882243ea1b154a5a4354a3047da8157

SHA256
dda55e44e8ab9b2a0d7fb5d47d05dee437939edb7426296d6b3c4a114d80940e

SHA512
0247133f899ab9f725697600e54aa553f2b237378096ee93643b15feefe2da3abd73a9b7899e13dc5a6f29181c7ef2631b08faf54991381cabfbda1f6a77ab52

Download Submit
memory/1192-0-0x000007FEF58D3000-0x000007FEF58D4000-memory.dmp

Filesize
4KB

Download
memory/1192-1-0x00000000010A0000-0x00000000010A8000-memory.dmp

Filesize
32KB

Download
memory/1192-2-0x000007FEF58D0000-0x000007FEF62BC000-memory.dmp

Filesize
9.9MB

Download
memory/1192-3-0x0000000000300000-0x0000000000360000-memory.dmp

Filesize
384KB

Download
memory/1192-27-0x000007FEF58D0000-0x000007FEF62BC000-memory.dmp

Filesize
9.9MB

Download
memory/2696-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2696-6-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2696-8-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2696-13-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2696-15-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2696-17-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2696-18-0x00000000746FE000-0x00000000746FF000-memory.dmp

Filesize
4KB

Download
memory/2696-10-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2696-26-0x00000000746F0000-0x0000000074DDE000-memory.dmp

Filesize
6.9MB

Download
memory/2696-4-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2696-28-0x00000000746FE000-0x00000000746FF000-memory.dmp

Filesize
4KB

Download
memory/2696-29-0x00000000746F0000-0x0000000074DDE000-memory.dmp

Filesize
6.9MB

Download

Analysis

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