xtremerat | bbcd9cd4a24ade21beb738ef84fa10afd475ecef65108ec29405b414ed34ce99

General

Target

7635820815d5e249ba90931ba32f70c1_JaffaCakes118.exe
Size

489KB
MD5

7635820815d5e249ba90931ba32f70c1
SHA1

8f676a92c378c6d67af5db6bd012c9943a979011
SHA256

bbcd9cd4a24ade21beb738ef84fa10afd475ecef65108ec29405b414ed34ce99
SHA512

0352f10d28a044ff18cd35c9d61c8a3a496e3e9e3a88dd20d6d916b929ae19844e84c5632c97a7088607ef169a05f21da106ac93597a2fd601cba883c62bcdb2
SSDEEP

3072:P1Cn0kBGhqUkDIshyfNdzRRdFNvNXLo/6CQBGhqUkDIshyftdzVRdPNLN:PcnSEynzLPNhLWjBEyHz3lN

Score

10^/10

xtremerat discovery persistence rat spyware upx

Malware Config

Signatures

Detect XtremeRAT payload 6 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4188-0-0x0000000000C80000-0x0000000000CFC000-memory.dmp	family_xtremerat
behavioral2/memory/4524-6-0x0000000000C80000-0x0000000000CFC000-memory.dmp	family_xtremerat
C:\Windows\SysWOW64\InstallDir\csrss.exe	family_xtremerat
behavioral2/memory/944-8-0x0000000000C80000-0x0000000000CFC000-memory.dmp	family_xtremerat
behavioral2/memory/4188-9-0x0000000000C80000-0x0000000000CFC000-memory.dmp	family_xtremerat
behavioral2/memory/944-11-0x0000000000C80000-0x0000000000CFC000-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

Processes:

7635820815d5e249ba90931ba32f70c1_JaffaCakes118.exesvchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{A81J14C6-813V-MUU8-S8N6-O3NG48YTA8L7}\StubPath = "C:\\Windows\\system32\\InstallDir\\csrss.exe restart"	7635820815d5e249ba90931ba32f70c1_JaffaCakes118.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{A81J14C6-813V-MUU8-S8N6-O3NG48YTA8L7}	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{A81J14C6-813V-MUU8-S8N6-O3NG48YTA8L7}\StubPath = "C:\\Windows\\system32\\InstallDir\\csrss.exe"	svchost.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{A81J14C6-813V-MUU8-S8N6-O3NG48YTA8L7}	7635820815d5e249ba90931ba32f70c1_JaffaCakes118.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

7635820815d5e249ba90931ba32f70c1_JaffaCakes118.exesvchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\HKLM = "C:\\Windows\\system32\\InstallDir\\csrss.exe"	7635820815d5e249ba90931ba32f70c1_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HKCU = "C:\\Windows\\system32\\InstallDir\\csrss.exe"	7635820815d5e249ba90931ba32f70c1_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\HKLM = "C:\\Windows\\system32\\InstallDir\\csrss.exe"	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HKCU = "C:\\Windows\\system32\\InstallDir\\csrss.exe"	svchost.exe

Drops file in System32 directory 2 IoCs

Processes:

7635820815d5e249ba90931ba32f70c1_JaffaCakes118.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\InstallDir\csrss.exe	7635820815d5e249ba90931ba32f70c1_JaffaCakes118.exe
File created	C:\Windows\SysWOW64\InstallDir\csrss.exe	7635820815d5e249ba90931ba32f70c1_JaffaCakes118.exe

UPX packed file 6 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4188-0-0x0000000000C80000-0x0000000000CFC000-memory.dmp	upx
behavioral2/memory/4524-6-0x0000000000C80000-0x0000000000CFC000-memory.dmp	upx
C:\Windows\SysWOW64\InstallDir\csrss.exe	upx
behavioral2/memory/944-8-0x0000000000C80000-0x0000000000CFC000-memory.dmp	upx
behavioral2/memory/4188-9-0x0000000000C80000-0x0000000000CFC000-memory.dmp	upx
behavioral2/memory/944-11-0x0000000000C80000-0x0000000000CFC000-memory.dmp	upx

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 3 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:

7635820815d5e249ba90931ba32f70c1_JaffaCakes118.exesvchost.exenotepad.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	7635820815d5e249ba90931ba32f70c1_JaffaCakes118.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

Processes:

notepad.exe

pid process

944 notepad.exe

pid	process
944	notepad.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

7635820815d5e249ba90931ba32f70c1_JaffaCakes118.exe

description	pid	process	target process
PID 4188 wrote to memory of 4524	4188	7635820815d5e249ba90931ba32f70c1_JaffaCakes118.exe	svchost.exe
PID 4188 wrote to memory of 4524	4188	7635820815d5e249ba90931ba32f70c1_JaffaCakes118.exe	svchost.exe
PID 4188 wrote to memory of 4524	4188	7635820815d5e249ba90931ba32f70c1_JaffaCakes118.exe	svchost.exe
PID 4188 wrote to memory of 4524	4188	7635820815d5e249ba90931ba32f70c1_JaffaCakes118.exe	svchost.exe
PID 4188 wrote to memory of 944	4188	7635820815d5e249ba90931ba32f70c1_JaffaCakes118.exe	notepad.exe
PID 4188 wrote to memory of 944	4188	7635820815d5e249ba90931ba32f70c1_JaffaCakes118.exe	notepad.exe
PID 4188 wrote to memory of 944	4188	7635820815d5e249ba90931ba32f70c1_JaffaCakes118.exe	notepad.exe
PID 4188 wrote to memory of 944	4188	7635820815d5e249ba90931ba32f70c1_JaffaCakes118.exe	notepad.exe

C:\Users\Admin\AppData\Local\Temp\7635820815d5e249ba90931ba32f70c1_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\7635820815d5e249ba90931ba32f70c1_JaffaCakes118.exe"
1⤵
- 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:4188
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Boot or Logon Autostart Execution: Active Setup
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  PID:4524
- C:\Windows\SysWOW64\notepad.exe
  notepad.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:944

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:\Windows\SysWOW64\InstallDir\csrss.exe

Filesize
489KB

MD5
7635820815d5e249ba90931ba32f70c1

SHA1
8f676a92c378c6d67af5db6bd012c9943a979011

SHA256
bbcd9cd4a24ade21beb738ef84fa10afd475ecef65108ec29405b414ed34ce99

SHA512
0352f10d28a044ff18cd35c9d61c8a3a496e3e9e3a88dd20d6d916b929ae19844e84c5632c97a7088607ef169a05f21da106ac93597a2fd601cba883c62bcdb2

Download Submit
memory/944-8-0x0000000000C80000-0x0000000000CFC000-memory.dmp

Filesize
496KB

Download
memory/944-11-0x0000000000C80000-0x0000000000CFC000-memory.dmp

Filesize
496KB

Download
memory/4188-0-0x0000000000C80000-0x0000000000CFC000-memory.dmp

Filesize
496KB

Download
memory/4188-9-0x0000000000C80000-0x0000000000CFC000-memory.dmp

Filesize
496KB

Download
memory/4524-6-0x0000000000C80000-0x0000000000CFC000-memory.dmp

Filesize
496KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads