xworm | 8bcb1766e1f236382b36fab2fc6a8ee385275c0acbf3067471cd9b35703f2875

General

Target

INV-20230406FD3.scr.exe
Size

620KB
MD5

ce504e263e64e997c9dfb2b4953d6ed9
SHA1

acd670aab3e783c87b1ab7781068f44b5379d83a
SHA256

8bcb1766e1f236382b36fab2fc6a8ee385275c0acbf3067471cd9b35703f2875
SHA512

fa990cd9f3e787f78ffce86cc54442750824ca7e7b0195d925809be8563db85bd692b71321f4ecd7c835e4e2f3fc77ac7d6669384a334f1029caf85f7904c18a
SSDEEP

12288:A+1AIO8DfvjXUL90+FuS7X8pVejWT1On8yEyhLreTAEBFvkR:A+1DfvjXABr7X0sjWxOn8yKTAEBFq

Score

10^/10

xworm discovery rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

45.200.148.105:2011

Mutex

d6r4OvNbMuDCNrHk

Attributes

Install_directory
%AppData%
install_file
Win32.exe

aes.plain

Signatures

Detect Xworm Payload 5 IoCs

resource	yara_rule
behavioral1/memory/2980-9-0x0000000000400000-0x0000000000410000-memory.dmp	family_xworm
behavioral1/memory/2980-13-0x0000000000400000-0x0000000000410000-memory.dmp	family_xworm
behavioral1/memory/2980-10-0x0000000000400000-0x0000000000410000-memory.dmp	family_xworm
behavioral1/memory/2980-15-0x0000000000400000-0x0000000000410000-memory.dmp	family_xworm
behavioral1/memory/2980-17-0x0000000000400000-0x0000000000410000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
xworm

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Win32.lnk	INV-20230406FD3.scr.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Win32.lnk	INV-20230406FD3.scr.exe

Loads dropped DLL 1 IoCs

pid	Process
2980	INV-20230406FD3.scr.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1652 set thread context of 2980	1652	INV-20230406FD3.scr.exe	31

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 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	INV-20230406FD3.scr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	INV-20230406FD3.scr.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1652	INV-20230406FD3.scr.exe
1652	INV-20230406FD3.scr.exe
2980	INV-20230406FD3.scr.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1652	INV-20230406FD3.scr.exe
Token: SeDebugPrivilege	2980	INV-20230406FD3.scr.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2980	INV-20230406FD3.scr.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1652 wrote to memory of 2980	1652	INV-20230406FD3.scr.exe	31
PID 1652 wrote to memory of 2980	1652	INV-20230406FD3.scr.exe	31
PID 1652 wrote to memory of 2980	1652	INV-20230406FD3.scr.exe	31
PID 1652 wrote to memory of 2980	1652	INV-20230406FD3.scr.exe	31
PID 1652 wrote to memory of 2980	1652	INV-20230406FD3.scr.exe	31
PID 1652 wrote to memory of 2980	1652	INV-20230406FD3.scr.exe	31
PID 1652 wrote to memory of 2980	1652	INV-20230406FD3.scr.exe	31
PID 1652 wrote to memory of 2980	1652	INV-20230406FD3.scr.exe	31
PID 1652 wrote to memory of 2980	1652	INV-20230406FD3.scr.exe	31

C:\Users\Admin\AppData\Local\Temp\INV-20230406FD3.scr.exe
"C:\Users\Admin\AppData\Local\Temp\INV-20230406FD3.scr.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1652
- C:\Users\Admin\AppData\Local\Temp\INV-20230406FD3.scr.exe
  "C:\Users\Admin\AppData\Local\Temp\INV-20230406FD3.scr.exe"
  2⤵
  - Drops startup file
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:2980

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

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

\Users\Admin\AppData\Roaming\Win32.exe

Filesize
620KB

MD5
ce504e263e64e997c9dfb2b4953d6ed9

SHA1
acd670aab3e783c87b1ab7781068f44b5379d83a

SHA256
8bcb1766e1f236382b36fab2fc6a8ee385275c0acbf3067471cd9b35703f2875

SHA512
fa990cd9f3e787f78ffce86cc54442750824ca7e7b0195d925809be8563db85bd692b71321f4ecd7c835e4e2f3fc77ac7d6669384a334f1029caf85f7904c18a

Download Submit
memory/1652-0-0x0000000074A8E000-0x0000000074A8F000-memory.dmp

Filesize
4KB

Download
memory/1652-1-0x0000000000D60000-0x0000000000DFE000-memory.dmp

Filesize
632KB

Download
memory/1652-2-0x0000000074A80000-0x000000007516E000-memory.dmp

Filesize
6.9MB

Download
memory/1652-3-0x0000000000700000-0x0000000000726000-memory.dmp

Filesize
152KB

Download
memory/1652-4-0x0000000074A8E000-0x0000000074A8F000-memory.dmp

Filesize
4KB

Download
memory/1652-5-0x0000000074A80000-0x000000007516E000-memory.dmp

Filesize
6.9MB

Download
memory/1652-6-0x0000000000250000-0x00000000002A4000-memory.dmp

Filesize
336KB

Download
memory/1652-19-0x0000000074A80000-0x000000007516E000-memory.dmp

Filesize
6.9MB

Download
memory/2980-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2980-13-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2980-10-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2980-8-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2980-15-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2980-17-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2980-18-0x0000000074A80000-0x000000007516E000-memory.dmp

Filesize
6.9MB

Download
memory/2980-9-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2980-7-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2980-25-0x0000000074A80000-0x000000007516E000-memory.dmp

Filesize
6.9MB

Download
memory/2980-26-0x0000000074A80000-0x000000007516E000-memory.dmp

Filesize
6.9MB

Download
memory/2980-27-0x0000000074A80000-0x000000007516E000-memory.dmp

Filesize
6.9MB

Download

Analysis

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