xtremerat | 8404c0bbedfd037d0a9587ae53e14610451dcf3dd8aaad0319347018a736bfd1

General

Target
JaffaCakes118_0201068d419420a99c289f33877a243f.exe
Size 830KB
Sample250121-evh55swlem
SHA256 8404c0bbedfd037d0a9587ae53e14610451dcf3dd8aaad0319347018a736bfd1
MD5 0201068d419420a99c289f33877a243f
SHA1 a2e32a2e97652728ab2add67f3f407ed79bffd7b
SHA512 9e9b316238d379b63e92f38d820a4c6f86f324400b189f5684a814a59a5bbf6bcd23e2f4fe6f921818ae9fbedf522fb72c02369d4d7f75ff66d6a400138a2458
SSDEEP 12288:v0sGCE4zBreayZpL3LaMv89OWOLVVF3B4oLPmolWNotd4/TAU/xoqLPay1odbm5n:RGsBrYZ5r5VT+ogHNfLPjQbm5Xaz0Ld
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

Family

C2

Detect XtremeRAT payload 4 IoCs

resource	yara_rule
behavioral2/memory/2356-2-0x0000000010000000-0x0000000010209000-memory.dmp	family_xtremerat
behavioral2/memory/2356-3-0x0000000010000000-0x0000000010209000-memory.dmp	family_xtremerat
behavioral2/memory/2356-4-0x0000000010000000-0x0000000010209000-memory.dmp	family_xtremerat
behavioral2/memory/2356-7-0x0000000010000000-0x0000000010209000-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

Identifies Wine through registry keys 2 TTPs 1 IoCs

Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

Query Registry

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Software\Wine	JaffaCakes118_0201068d419420a99c289f33877a243f.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

Bootkit

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	JaffaCakes118_0201068d419420a99c289f33877a243f.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
2356	JaffaCakes118_0201068d419420a99c289f33877a243f.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
4072	2880	WerFault.exe	83
3424	2880	WerFault.exe	83

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

System Language Discovery

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_0201068d419420a99c289f33877a243f.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2356	JaffaCakes118_0201068d419420a99c289f33877a243f.exe
2356	JaffaCakes118_0201068d419420a99c289f33877a243f.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2356 wrote to memory of 2880	2356	JaffaCakes118_0201068d419420a99c289f33877a243f.exe	83
PID 2356 wrote to memory of 2880	2356	JaffaCakes118_0201068d419420a99c289f33877a243f.exe	83
PID 2356 wrote to memory of 2880	2356	JaffaCakes118_0201068d419420a99c289f33877a243f.exe	83
PID 2356 wrote to memory of 2880	2356	JaffaCakes118_0201068d419420a99c289f33877a243f.exe	83
PID 2356 wrote to memory of 3456	2356	JaffaCakes118_0201068d419420a99c289f33877a243f.exe	84
PID 2356 wrote to memory of 3456	2356	JaffaCakes118_0201068d419420a99c289f33877a243f.exe	84
PID 2356 wrote to memory of 3456	2356	JaffaCakes118_0201068d419420a99c289f33877a243f.exe	84

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0201068d419420a99c289f33877a243f.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0201068d419420a99c289f33877a243f.exe"
1⤵
- Identifies Wine through registry keys
- Writes to the Master Boot Record (MBR)
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2356
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  PID:2880
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2880 -s 200
    3⤵
    - Program crash
    PID:4072
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2880 -s 208
    3⤵
    - Program crash
    PID:3424
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"
  2⤵
  PID:3456