xtremerat | 688fd01cfe4002cfa253a19cdea3d021d2bc99b5883594e8ab77d9b0a5c817ab

General

Target

manifest.rtf.scr
Size

907KB
MD5

71c5d618ca7c23f9a047a09ff1e85439
SHA1

94a8f295935cad0cd03017b23ce115931f7c13f6
SHA256

0e9b42ef9a5663d38c5cf3161488086a36e04834a6b231bf87486efa56081e3a
SHA512

950683cb16158c461a68cc61f890492492d9eb25a2fd4a0712ded084d1d4b98dbcef80c3de14f0670cc44fd0c68c9cf9252e752a5cbc93b7dcf22f90b141b701
SSDEEP

12288:2hkDgouVA2nxKkorvdRgQriDwOIxmxiZnYQE7PJcE4a0CI5YRBuhI0SjxXt3M1h:mRmJkcoQricOIQxiZY1ianaYCuxy1h

Score

10^/10

xtremerat discovery persistence rat spyware

Malware Config

Extracted

Family

xtremerat

C2

xialscox.no-ip.org

$xialscox.no-ip.org

Signatures

Detect XtremeRAT payload 8 IoCs

resource	yara_rule
behavioral1/memory/1732-8-0x0000000000C80000-0x0000000000CA3000-memory.dmp	family_xtremerat
behavioral1/memory/1732-9-0x0000000000C80000-0x0000000000CA3000-memory.dmp	family_xtremerat
behavioral1/memory/1732-10-0x0000000000C80000-0x0000000000CA3000-memory.dmp	family_xtremerat
behavioral1/memory/1732-11-0x0000000000C80000-0x0000000000CA3000-memory.dmp	family_xtremerat
behavioral1/memory/4464-18-0x0000000000C80000-0x0000000000CA3000-memory.dmp	family_xtremerat
behavioral1/memory/4408-20-0x0000000000C80000-0x0000000000CA3000-memory.dmp	family_xtremerat
behavioral1/memory/1732-23-0x0000000000C80000-0x0000000000CA3000-memory.dmp	family_xtremerat
behavioral1/memory/4408-25-0x0000000000C80000-0x0000000000CA3000-memory.dmp	family_xtremerat

XtremeRAT
The XtremeRAT was developed by xtremecoder and has been available since at least 2010, and written in Delphi.
persistence spyware rat xtremerat
Xtremerat family
xtremerat

Boot or Logon Autostart Execution: Active Setup 2 TTPs 4 IoCs

Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

persistence

Active Setup

T1547.014

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{16IO55VS-GSOS-47VN-IJP8-4ODND72YC4Y5}\StubPath = "C:\\Windows\\system32\\Sysfiles\\csrss.exe restart"	manifest.rtf.scr
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{16IO55VS-GSOS-47VN-IJP8-4ODND72YC4Y5}	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{16IO55VS-GSOS-47VN-IJP8-4ODND72YC4Y5}\StubPath = "C:\\Windows\\system32\\Sysfiles\\csrss.exe restart"	svchost.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{16IO55VS-GSOS-47VN-IJP8-4ODND72YC4Y5}	manifest.rtf.scr

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\HKLM = "C:\\Windows\\system32\\Sysfiles\\csrss.exe"	manifest.rtf.scr
Set value (str)	\REGISTRY\USER\S-1-5-21-3027557611-1484967174-339164627-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HKCU = "C:\\Windows\\system32\\Sysfiles\\csrss.exe"	manifest.rtf.scr
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\HKLM = "C:\\Windows\\system32\\Sysfiles\\csrss.exe"	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3027557611-1484967174-339164627-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HKCU = "C:\\Windows\\system32\\Sysfiles\\csrss.exe"	svchost.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/files/0x00070000000241d8-19.dat	autoit_exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Sysfiles\csrss.exe	manifest.rtf.scr
File created	C:\Windows\SysWOW64\Sysfiles\csrss.exe	manifest.rtf.scr
File opened for modification	C:\Windows\SysWOW64\Sysfiles\	manifest.rtf.scr

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4616 set thread context of 1732	4616	manifest.rtf.scr	86

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 4 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	manifest.rtf.scr
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	manifest.rtf.scr
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4616	manifest.rtf.scr
4616	manifest.rtf.scr
4616	manifest.rtf.scr
4616	manifest.rtf.scr
4616	manifest.rtf.scr
4616	manifest.rtf.scr

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4408	explorer.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 4616 wrote to memory of 1732	4616	manifest.rtf.scr	86
PID 4616 wrote to memory of 1732	4616	manifest.rtf.scr	86
PID 4616 wrote to memory of 1732	4616	manifest.rtf.scr	86
PID 4616 wrote to memory of 1732	4616	manifest.rtf.scr	86
PID 4616 wrote to memory of 1732	4616	manifest.rtf.scr	86
PID 4616 wrote to memory of 1732	4616	manifest.rtf.scr	86
PID 4616 wrote to memory of 1732	4616	manifest.rtf.scr	86
PID 4616 wrote to memory of 1732	4616	manifest.rtf.scr	86
PID 4616 wrote to memory of 1732	4616	manifest.rtf.scr	86
PID 4616 wrote to memory of 1732	4616	manifest.rtf.scr	86
PID 4616 wrote to memory of 1732	4616	manifest.rtf.scr	86
PID 4616 wrote to memory of 1732	4616	manifest.rtf.scr	86
PID 4616 wrote to memory of 1732	4616	manifest.rtf.scr	86
PID 1732 wrote to memory of 4464	1732	manifest.rtf.scr	89
PID 1732 wrote to memory of 4464	1732	manifest.rtf.scr	89
PID 1732 wrote to memory of 4464	1732	manifest.rtf.scr	89
PID 1732 wrote to memory of 4464	1732	manifest.rtf.scr	89
PID 1732 wrote to memory of 4408	1732	manifest.rtf.scr	90
PID 1732 wrote to memory of 4408	1732	manifest.rtf.scr	90
PID 1732 wrote to memory of 4408	1732	manifest.rtf.scr	90
PID 1732 wrote to memory of 4528	1732	manifest.rtf.scr	91
PID 1732 wrote to memory of 4528	1732	manifest.rtf.scr	91
PID 1732 wrote to memory of 4528	1732	manifest.rtf.scr	91
PID 1732 wrote to memory of 4408	1732	manifest.rtf.scr	90

C:\Users\Admin\AppData\Local\Temp\manifest.rtf.scr
"C:\Users\Admin\AppData\Local\Temp\manifest.rtf.scr" /S
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4616
- C:\Users\Admin\AppData\Local\Temp\manifest.rtf.scr
  "C:\Users\Admin\AppData\Local\Temp\manifest.rtf.scr"
  2⤵
  - Boot or Logon Autostart Execution: Active Setup
  - Adds Run key to start application
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1732
- - C:\Windows\SysWOW64\svchost.exe
    svchost.exe
    3⤵
    - Boot or Logon Autostart Execution: Active Setup
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    PID:4464
- - C:\Windows\SysWOW64\explorer.exe
    explorer.exe
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:4408
- - C:\Windows\SysWOW64\explorer.exe
    explorer.exe
    3⤵
    PID:4528

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Active Setup

1

T1547.014

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Active Setup

1

T1547.014

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

2

T1112

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\aut948F.tmp

Filesize
107KB

MD5
77907062630cd5d3d0946f2632f7a389

SHA1
6dc199486b91478ff557c3051bff5d662ad594cb

SHA256
383f054b22f0158a81fc16b35f7cf540dbff7623c1569793f459972f33c28f48

SHA512
182be6a1f3a06c312abe9d56834580d34ca358f9d1bce934332349e04b7f60e597a0d72a4b148a375ae848479694644c1f8b9e907111e26dbdf33b3df6293f1a

Download Submit
C:\Windows\SysWOW64\Sysfiles\csrss.exe

Filesize
907KB

MD5
71c5d618ca7c23f9a047a09ff1e85439

SHA1
94a8f295935cad0cd03017b23ce115931f7c13f6

SHA256
0e9b42ef9a5663d38c5cf3161488086a36e04834a6b231bf87486efa56081e3a

SHA512
950683cb16158c461a68cc61f890492492d9eb25a2fd4a0712ded084d1d4b98dbcef80c3de14f0670cc44fd0c68c9cf9252e752a5cbc93b7dcf22f90b141b701

Download Submit
memory/1732-8-0x0000000000C80000-0x0000000000CA3000-memory.dmp

Filesize
140KB

Download
memory/1732-9-0x0000000000C80000-0x0000000000CA3000-memory.dmp

Filesize
140KB

Download
memory/1732-10-0x0000000000C80000-0x0000000000CA3000-memory.dmp

Filesize
140KB

Download
memory/1732-11-0x0000000000C80000-0x0000000000CA3000-memory.dmp

Filesize
140KB

Download
memory/1732-23-0x0000000000C80000-0x0000000000CA3000-memory.dmp

Filesize
140KB

Download
memory/4408-20-0x0000000000C80000-0x0000000000CA3000-memory.dmp

Filesize
140KB

Download
memory/4408-25-0x0000000000C80000-0x0000000000CA3000-memory.dmp

Filesize
140KB

Download
memory/4464-18-0x0000000000C80000-0x0000000000CA3000-memory.dmp

Filesize
140KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads