xtremerat | a409efd8b2bcc803bffdc3b0901634ee46eb0d0a2eecf3eaa46741e59cec813f

General

Target

78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe
Size

651KB
MD5

78cd48b4481c1e8ab9989097d2f14913
SHA1

be37149bd577e82b081dff4c4bca669ee8cc360c
SHA256

a409efd8b2bcc803bffdc3b0901634ee46eb0d0a2eecf3eaa46741e59cec813f
SHA512

0a5a31e2ca884da748a3c0e0d8f372aa31c99b275b5ffc07a93026d854ba9c12c3d02c2455dbf37f45ca0eceaa323125acaaeb531c8afada4f29ace7af45e630
SSDEEP

12288:kxpz4TolPke11PbUcqcyylNoJSKT4Cw5ZqDrqKgA96MmAgj24:kxF40pkW1j5LyylNoJSpCi4p96Muy4

Score

10^/10

xtremerat discovery persistence rat spyware upx

Malware Config

Extracted

Family

xtremerat

C2

eminn115.zapto.org

Signatures

Detect XtremeRAT payload 6 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4296-13-0x0000000010000000-0x000000001004D000-memory.dmp	family_xtremerat
behavioral2/memory/1560-14-0x0000000010000000-0x000000001004D000-memory.dmp	family_xtremerat
behavioral2/memory/2044-15-0x0000000010000000-0x000000001004D000-memory.dmp	family_xtremerat
behavioral2/memory/2044-17-0x0000000010000000-0x000000001004D000-memory.dmp	family_xtremerat
behavioral2/memory/1560-18-0x0000000010000000-0x000000001004D000-memory.dmp	family_xtremerat
behavioral2/memory/2044-19-0x0000000010000000-0x000000001004D000-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

Processes:

explorer.exe

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{S3UCUNI3-N71B-K1N3-UXIC-C0D86E681A87}	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{S3UCUNI3-N71B-K1N3-UXIC-C0D86E681A87}\StubPath = "C:\\Windows\\system32\\InstallDir\\svchost.exe restart"	explorer.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

explorer.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\HKLM = "C:\\Windows\\system32\\InstallDir\\svchost.exe"	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HKCU = "C:\\Windows\\system32\\InstallDir\\svchost.exe"	explorer.exe

Drops file in System32 directory 2 IoCs

Processes:

explorer.exe

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\InstallDir\svchost.exe	explorer.exe
File created	C:\Windows\SysWOW64\InstallDir\svchost.exe	explorer.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe

description	pid	Process	procid_target
PID 1920 set thread context of 4296	1920	78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe	84

UPX packed file 8 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4296-8-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral2/memory/4296-10-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral2/memory/4296-13-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral2/memory/1560-14-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral2/memory/2044-15-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral2/memory/2044-17-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral2/memory/1560-18-0x0000000010000000-0x000000001004D000-memory.dmp	upx
behavioral2/memory/2044-19-0x0000000010000000-0x000000001004D000-memory.dmp	upx

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

System Information Discovery
T1082

Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid	pid_target	Process	procid_target
4408	1560	WerFault.exe	85
4496	1560	WerFault.exe	85

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

Processes:

78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exesvchost.exeexplorer.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe

Modifies registry class 2 IoCs

Processes:

78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\ad1524300687u.hnx	78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\ad1524300687u.hnx\ = 2a12d083c8562216c2616fb1e4f39320	78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exeexplorer.exe

pid	Process
1920	78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe
2044	explorer.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe

description	pid	Process	procid_target
PID 1920 wrote to memory of 4296	1920	78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe	84
PID 1920 wrote to memory of 4296	1920	78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe	84
PID 1920 wrote to memory of 4296	1920	78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe	84
PID 1920 wrote to memory of 4296	1920	78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe	84
PID 1920 wrote to memory of 4296	1920	78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe	84
PID 1920 wrote to memory of 4296	1920	78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe	84
PID 1920 wrote to memory of 4296	1920	78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe	84
PID 1920 wrote to memory of 4296	1920	78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe	84
PID 4296 wrote to memory of 1560	4296	78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe	85
PID 4296 wrote to memory of 1560	4296	78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe	85
PID 4296 wrote to memory of 1560	4296	78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe	85
PID 4296 wrote to memory of 1560	4296	78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe	85
PID 4296 wrote to memory of 2044	4296	78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe	86
PID 4296 wrote to memory of 2044	4296	78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe	86
PID 4296 wrote to memory of 2044	4296	78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe	86
PID 4296 wrote to memory of 2044	4296	78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe	86

C:\Users\Admin\AppData\Local\Temp\78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe"
1⤵
- Checks BIOS information in registry
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Enumerates system info in registry
- Modifies registry class
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1920
- C:\Users\Admin\AppData\Local\Temp\78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe
  C:\Users\Admin\AppData\Local\Temp\78cd48b4481c1e8ab9989097d2f14913_JaffaCakes118.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4296
- - C:\Windows\SysWOW64\svchost.exe
    svchost.exe
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1560
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1560 -s 480
      4⤵
      Program crash
      PID:4408
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1560 -s 504
      4⤵
      Program crash
      PID:4496
- - C:\Windows\SysWOW64\explorer.exe
    explorer.exe
    3⤵
    - 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 SetWindowsHookEx
    PID:2044

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 208 -p 1560 -ip 1560
1⤵
PID:4372

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 1560 -ip 1560
1⤵
PID:3892

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

Query Registry

2

T1012

System Information Discovery

3

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

memory/1560-14-0x0000000010000000-0x000000001004D000-memory.dmp

Filesize
308KB

Download
memory/1560-18-0x0000000010000000-0x000000001004D000-memory.dmp

Filesize
308KB

Download
memory/1920-0-0x0000000000400000-0x00000000004B9000-memory.dmp

Filesize
740KB

Download
memory/1920-5-0x0000000000401000-0x0000000000422000-memory.dmp

Filesize
132KB

Download
memory/1920-12-0x0000000000401000-0x0000000000422000-memory.dmp

Filesize
132KB

Download
memory/1920-11-0x0000000000400000-0x00000000004B9000-memory.dmp

Filesize
740KB

Download
memory/2044-15-0x0000000010000000-0x000000001004D000-memory.dmp

Filesize
308KB

Download
memory/2044-17-0x0000000010000000-0x000000001004D000-memory.dmp

Filesize
308KB

Download
memory/2044-19-0x0000000010000000-0x000000001004D000-memory.dmp

Filesize
308KB

Download
memory/4296-8-0x0000000010000000-0x000000001004D000-memory.dmp

Filesize
308KB

Download
memory/4296-10-0x0000000010000000-0x000000001004D000-memory.dmp

Filesize
308KB

Download
memory/4296-13-0x0000000010000000-0x000000001004D000-memory.dmp

Filesize
308KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads