xtremerat | 3945eb0f3cab76c2b4ab04ed15cef673e3441512d71a4130d7354826b73f8e60

General

Target

ccc81326fe04f6fafeed6feb27538e6f_JaffaCakes118.exe
Size

150KB
MD5

ccc81326fe04f6fafeed6feb27538e6f
SHA1

15b5e789a8b24a869020085f8253f1645439ae28
SHA256

3945eb0f3cab76c2b4ab04ed15cef673e3441512d71a4130d7354826b73f8e60
SHA512

e6622c68cb84eb61dec146a76118f1129668fe2f6b90ddab6541fad2811b82f7bad5bc1b85dfd250ce0d9312469e369a3527378899e8954d0a73ce23eacc6c5a
SSDEEP

3072:PEPHs79dJt1ipxz9h5nGlFt0myNW7dEvotvXWaK:xVt1ipxxelczNW7mvIu

Score

10^/10

xtremerat discovery persistence rat spyware upx

Malware Config

Signatures

Detect XtremeRAT payload 6 IoCs

resource	yara_rule
behavioral2/memory/3944-8-0x0000000010000000-0x000000001004D000-memory.dmp	family_xtremerat
behavioral2/memory/640-9-0x0000000010000000-0x000000001004D000-memory.dmp	family_xtremerat
behavioral2/memory/2616-11-0x0000000010000000-0x000000001004D000-memory.dmp	family_xtremerat
behavioral2/memory/640-13-0x0000000010000000-0x000000001004D000-memory.dmp	family_xtremerat
behavioral2/memory/3944-15-0x0000000010000000-0x000000001004D000-memory.dmp	family_xtremerat
behavioral2/memory/640-16-0x0000000010000000-0x000000001004D000-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 2 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
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{0431CCX1-O811-M84J-BH64-H1J2B6B6742D}	notepad.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{0431CCX1-O811-M84J-BH64-H1J2B6B6742D}\StubPath = "C:\\Windows\\InstallDir\\Server.exe restart"	notepad.exe

Executes dropped EXE 1 IoCs

pid	Process
2616	server.exe

Adds Run key to start application 2 TTPs 2 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\\InstallDir\\Server.exe"	notepad.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HKCU = "C:\\Windows\\InstallDir\\Server.exe"	notepad.exe

UPX packed file 8 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/files/0x0009000000023c91-5.dat	upx
behavioral2/memory/2616-6-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral2/memory/3944-8-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral2/memory/640-9-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral2/memory/2616-11-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral2/memory/640-13-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral2/memory/3944-15-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral2/memory/640-16-0x0000000010000000-0x000000001004D000-memory.dmp	upx

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\InstallDir\Server.exe	notepad.exe
File created	C:\Windows\InstallDir\Server.exe	notepad.exe

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

System Information Discovery
T1082

Program crash 4 IoCs

pid	pid_target	Process	procid_target
384	3944	WerFault.exe	83
2504	3944	WerFault.exe	83
3180	640	WerFault.exe	84
3928	640	WerFault.exe	84

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	ccc81326fe04f6fafeed6feb27538e6f_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	server.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	notepad.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
640	notepad.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 3164 wrote to memory of 2616	3164	ccc81326fe04f6fafeed6feb27538e6f_JaffaCakes118.exe	82
PID 3164 wrote to memory of 2616	3164	ccc81326fe04f6fafeed6feb27538e6f_JaffaCakes118.exe	82
PID 3164 wrote to memory of 2616	3164	ccc81326fe04f6fafeed6feb27538e6f_JaffaCakes118.exe	82
PID 2616 wrote to memory of 3944	2616	server.exe	83
PID 2616 wrote to memory of 3944	2616	server.exe	83
PID 2616 wrote to memory of 3944	2616	server.exe	83
PID 2616 wrote to memory of 3944	2616	server.exe	83
PID 2616 wrote to memory of 640	2616	server.exe	84
PID 2616 wrote to memory of 640	2616	server.exe	84
PID 2616 wrote to memory of 640	2616	server.exe	84
PID 2616 wrote to memory of 640	2616	server.exe	84

C:\Users\Admin\AppData\Local\Temp\ccc81326fe04f6fafeed6feb27538e6f_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\ccc81326fe04f6fafeed6feb27538e6f_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3164
- C:\Users\Admin\AppData\Local\Temp\server.exe
  "C:\Users\Admin\AppData\Local\Temp\server.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2616
- - C:\Windows\SysWOW64\svchost.exe
    svchost.exe
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3944
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3944 -s 488
      4⤵
      Program crash
      PID:384
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3944 -s 496
      4⤵
      Program crash
      PID:2504
- - C:\Windows\SysWOW64\notepad.exe
    notepad.exe
    3⤵
    - Boot or Logon Autostart Execution: Active Setup
    - Adds Run key to start application
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:640
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 640 -s 972
      4⤵
      Program crash
      PID:3180
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 640 -s 980
      4⤵
      Program crash
      PID:3928

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3944 -ip 3944
1⤵
PID:4948

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 3944 -ip 3944
1⤵
PID:3660

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 640 -ip 640
1⤵
PID:3284

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 640 -ip 640
1⤵
PID:5000

Network

MITRE ATT&CK Enterprise v15

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\server.exe

Filesize
33KB

MD5
76bad5e20a710a55b66cdc0d77650e08

SHA1
51a55fe8ea408e8dd0ba47f63af18b0253442479

SHA256
a2a39704296e9fe7dfe4e01458b7062ab368110db376440286db40d641e1d001

SHA512
35bdaea153e853e1a489ae153c4c5319425d3560a7d9e027e2e8d46cb9662a3199c2b24bba2f9aa92996cb85c7e628907b644d016f2a8efe94815dfc8322062c

Download Submit
memory/640-9-0x0000000010000000-0x000000001004D000-memory.dmp

Filesize
308KB

Download
memory/640-13-0x0000000010000000-0x000000001004D000-memory.dmp

Filesize
308KB

Download
memory/640-16-0x0000000010000000-0x000000001004D000-memory.dmp

Filesize
308KB

Download
memory/2616-6-0x0000000010000000-0x000000001004D000-memory.dmp

Filesize
308KB

Download
memory/2616-11-0x0000000010000000-0x000000001004D000-memory.dmp

Filesize
308KB

Download
memory/3944-8-0x0000000010000000-0x000000001004D000-memory.dmp

Filesize
308KB

Download
memory/3944-15-0x0000000010000000-0x000000001004D000-memory.dmp

Filesize
308KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads