xtremerat | 5c4946add18f556173a1d39ab8ff9715b87683d076f2c080ea48caf8c380b629

General

Target
349faf873bf744843321372d136909ab_JaffaCakes118.exe
Size 243KB
Sample240710-n5kldsycra
SHA256 5c4946add18f556173a1d39ab8ff9715b87683d076f2c080ea48caf8c380b629
MD5 349faf873bf744843321372d136909ab
SHA1 d3bd232c7caa67ef75ee1a748be2538dcf369141
SHA512 7c7cdd4bb4bdadaf8b5c451be152410b1102d9b0556dce6f4b8ba1c6a2f298230ef322378a106c7da1215345972d0917f8611ec4d9ec33460da1c872966e42fc
SSDEEP 3072:XFd2Afoka0uMMGYmKlMCJ+UrxkCkK9a7+Z3wCYdj8vK1HDvhk1eSkDyfCnewUmG7:1jQwuYKs7M3jvEu1nkaCneT3NmEQm
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xtremerat persistence rat spyware

Malware Config

Extracted

Family

xtremerat

C2

umtakcicek.dyndns.org
ࠁ谀umtakcicek.dyndns.org

Signatures

Detect XtremeRAT payload 9 IoCs

resource	yara_rule
behavioral2/memory/3944-3-0x0000000010000000-0x000000001004A000-memory.dmp	family_xtremerat
behavioral2/memory/3944-4-0x0000000010000000-0x000000001004A000-memory.dmp	family_xtremerat
behavioral2/memory/3944-5-0x0000000010000000-0x000000001004A000-memory.dmp	family_xtremerat
behavioral2/memory/3944-7-0x0000000010000000-0x000000001004A000-memory.dmp	family_xtremerat
behavioral2/memory/4552-8-0x0000000010000000-0x000000001004A000-memory.dmp	family_xtremerat
behavioral2/memory/3944-10-0x0000000010000000-0x000000001004A000-memory.dmp	family_xtremerat
behavioral2/memory/3944-11-0x0000000010000000-0x000000001004A000-memory.dmp	family_xtremerat
behavioral2/memory/4552-13-0x0000000010000000-0x000000001004A000-memory.dmp	family_xtremerat
behavioral2/memory/3944-14-0x0000000010000000-0x000000001004A000-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

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\{R2WI1CKR-X553-362C-326D-0QL77F442L71}	349faf873bf744843321372d136909ab_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{R2WI1CKR-X553-362C-326D-0QL77F442L71}\StubPath = "C:\\Windows\\Windows Live Messenger\\msnmsgr.exe restart"	349faf873bf744843321372d136909ab_JaffaCakes118.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\Windows Live Messenger = "C:\\Windows\\Windows Live Messenger\\msnmsgr.exe"	349faf873bf744843321372d136909ab_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-47134698-4092160662-1261813102-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Live Messenger = "C:\\Windows\\Windows Live Messenger\\msnmsgr.exe"	349faf873bf744843321372d136909ab_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4260 set thread context of 3944	4260	349faf873bf744843321372d136909ab_JaffaCakes118.exe	83

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Windows Live Messenger\msnmsgr.exe	349faf873bf744843321372d136909ab_JaffaCakes118.exe
File created	C:\Windows\Windows Live Messenger\msnmsgr.exe	349faf873bf744843321372d136909ab_JaffaCakes118.exe

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

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
2916	4552	WerFault.exe	85
2756	4552	WerFault.exe	85

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4260	349faf873bf744843321372d136909ab_JaffaCakes118.exe
3944	349faf873bf744843321372d136909ab_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 4260 wrote to memory of 3944	4260	349faf873bf744843321372d136909ab_JaffaCakes118.exe	83
PID 4260 wrote to memory of 3944	4260	349faf873bf744843321372d136909ab_JaffaCakes118.exe	83
PID 4260 wrote to memory of 3944	4260	349faf873bf744843321372d136909ab_JaffaCakes118.exe	83
PID 4260 wrote to memory of 3944	4260	349faf873bf744843321372d136909ab_JaffaCakes118.exe	83
PID 4260 wrote to memory of 3944	4260	349faf873bf744843321372d136909ab_JaffaCakes118.exe	83
PID 4260 wrote to memory of 3944	4260	349faf873bf744843321372d136909ab_JaffaCakes118.exe	83
PID 4260 wrote to memory of 3944	4260	349faf873bf744843321372d136909ab_JaffaCakes118.exe	83
PID 4260 wrote to memory of 3944	4260	349faf873bf744843321372d136909ab_JaffaCakes118.exe	83
PID 4260 wrote to memory of 3944	4260	349faf873bf744843321372d136909ab_JaffaCakes118.exe	83
PID 4260 wrote to memory of 3944	4260	349faf873bf744843321372d136909ab_JaffaCakes118.exe	83
PID 4260 wrote to memory of 3944	4260	349faf873bf744843321372d136909ab_JaffaCakes118.exe	83
PID 4260 wrote to memory of 3944	4260	349faf873bf744843321372d136909ab_JaffaCakes118.exe	83
PID 4260 wrote to memory of 3944	4260	349faf873bf744843321372d136909ab_JaffaCakes118.exe	83
PID 3944 wrote to memory of 4552	3944	349faf873bf744843321372d136909ab_JaffaCakes118.exe	85
PID 3944 wrote to memory of 4552	3944	349faf873bf744843321372d136909ab_JaffaCakes118.exe	85
PID 3944 wrote to memory of 4552	3944	349faf873bf744843321372d136909ab_JaffaCakes118.exe	85
PID 3944 wrote to memory of 4552	3944	349faf873bf744843321372d136909ab_JaffaCakes118.exe	85

C:\Users\Admin\AppData\Local\Temp\349faf873bf744843321372d136909ab_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\349faf873bf744843321372d136909ab_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4260
- C:\Users\Admin\AppData\Local\Temp\349faf873bf744843321372d136909ab_JaffaCakes118.exe
  C:\Users\Admin\AppData\Local\Temp\349faf873bf744843321372d136909ab_JaffaCakes118.exe
  2⤵
  - Boot or Logon Autostart Execution: Active Setup
  - Adds Run key to start application
  - Drops file in Windows directory
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3944
- - C:\Windows\SysWOW64\svchost.exe
    svchost.exe
    3⤵
    PID:4552
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4552 -s 480
      4⤵
      Program crash
      PID:2916
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4552 -s 488
      4⤵
      Program crash
      PID:2756