xtremerat | f5a67079ca773d6862aab798b84b3c175a025ae0205a15b69723c2bc5ac6ed92

General

Target

a5c337b9a5108d6172cbca8867b42afa_JaffaCakes118.exe
Size

286KB
MD5

a5c337b9a5108d6172cbca8867b42afa
SHA1

8886719a216391db4193ae096240fc8fa77a298d
SHA256

f5a67079ca773d6862aab798b84b3c175a025ae0205a15b69723c2bc5ac6ed92
SHA512

6cbacfb0d46046355db9146b24f7a3706d5925bb92f4139b31b872d4f3d23d38a7aad3fc362c6223c1746df20a360b89ad09990e1f0296156fe3053f64a55f6a
SSDEEP

3072:4vDNI+KjNTjuO8zYkS6P+pmjVItNz/jO71r06JvJiPn29D+55HSk99XJcTphigTt:023jNWspjNHSk7uXCRzl5R/cx

Score

10^/10

xtremerat discovery persistence rat spyware upx

Malware Config

Signatures

Detect XtremeRAT payload 4 IoCs

resource	yara_rule
behavioral2/memory/5116-24-0x0000000000C80000-0x0000000000C95000-memory.dmp	family_xtremerat
behavioral2/memory/3732-26-0x0000000000C80000-0x0000000000C95000-memory.dmp	family_xtremerat
behavioral2/memory/3512-27-0x0000000000C80000-0x0000000000C95000-memory.dmp	family_xtremerat
behavioral2/memory/3732-29-0x0000000000C80000-0x0000000000C95000-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

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{5460C4DF-B266-909E-CB58-E32B79832EB2}	Decrypted.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5460C4DF-B266-909E-CB58-E32B79832EB2}\StubPath = "C:\\Windows\\InstallDir\\winlog.exe restart"	Decrypted.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{5460C4DF-B266-909E-CB58-E32B79832EB2}	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5460C4DF-B266-909E-CB58-E32B79832EB2}\StubPath = "C:\\Windows\\InstallDir\\winlog.exe"	svchost.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	a5c337b9a5108d6172cbca8867b42afa_JaffaCakes118.exe

Executes dropped EXE 1 IoCs

pid	Process
3512	Decrypted.exe

Adds Run key to start application 2 TTPs 4 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\\winlog.exe"	Decrypted.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HKCU = "C:\\Windows\\InstallDir\\winlog.exe"	Decrypted.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\HKLM = "C:\\Windows\\InstallDir\\winlog.exe"	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HKCU = "C:\\Windows\\InstallDir\\winlog.exe"	svchost.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1960 set thread context of 4232	1960	a5c337b9a5108d6172cbca8867b42afa_JaffaCakes118.exe	82

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000a000000023b9b-12.dat	upx
behavioral2/memory/3512-15-0x0000000000C80000-0x0000000000C95000-memory.dmp	upx
behavioral2/memory/5116-24-0x0000000000C80000-0x0000000000C95000-memory.dmp	upx
behavioral2/memory/3732-26-0x0000000000C80000-0x0000000000C95000-memory.dmp	upx
behavioral2/memory/3512-27-0x0000000000C80000-0x0000000000C95000-memory.dmp	upx
behavioral2/memory/3732-29-0x0000000000C80000-0x0000000000C95000-memory.dmp	upx

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\InstallDir\winlog.exe	Decrypted.exe
File created	C:\Windows\InstallDir\winlog.exe	Decrypted.exe

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 5 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	a5c337b9a5108d6172cbca8867b42afa_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a5c337b9a5108d6172cbca8867b42afa_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Decrypted.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
1960	a5c337b9a5108d6172cbca8867b42afa_JaffaCakes118.exe
4232	a5c337b9a5108d6172cbca8867b42afa_JaffaCakes118.exe
4232	a5c337b9a5108d6172cbca8867b42afa_JaffaCakes118.exe
3732	explorer.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1960 wrote to memory of 4232	1960	a5c337b9a5108d6172cbca8867b42afa_JaffaCakes118.exe	82
PID 1960 wrote to memory of 4232	1960	a5c337b9a5108d6172cbca8867b42afa_JaffaCakes118.exe	82
PID 1960 wrote to memory of 4232	1960	a5c337b9a5108d6172cbca8867b42afa_JaffaCakes118.exe	82
PID 1960 wrote to memory of 4232	1960	a5c337b9a5108d6172cbca8867b42afa_JaffaCakes118.exe	82
PID 1960 wrote to memory of 4232	1960	a5c337b9a5108d6172cbca8867b42afa_JaffaCakes118.exe	82
PID 1960 wrote to memory of 4232	1960	a5c337b9a5108d6172cbca8867b42afa_JaffaCakes118.exe	82
PID 1960 wrote to memory of 4232	1960	a5c337b9a5108d6172cbca8867b42afa_JaffaCakes118.exe	82
PID 1960 wrote to memory of 4232	1960	a5c337b9a5108d6172cbca8867b42afa_JaffaCakes118.exe	82
PID 1960 wrote to memory of 4232	1960	a5c337b9a5108d6172cbca8867b42afa_JaffaCakes118.exe	82
PID 4232 wrote to memory of 3512	4232	a5c337b9a5108d6172cbca8867b42afa_JaffaCakes118.exe	83
PID 4232 wrote to memory of 3512	4232	a5c337b9a5108d6172cbca8867b42afa_JaffaCakes118.exe	83
PID 4232 wrote to memory of 3512	4232	a5c337b9a5108d6172cbca8867b42afa_JaffaCakes118.exe	83
PID 3512 wrote to memory of 5116	3512	Decrypted.exe	84
PID 3512 wrote to memory of 5116	3512	Decrypted.exe	84
PID 3512 wrote to memory of 5116	3512	Decrypted.exe	84
PID 3512 wrote to memory of 5116	3512	Decrypted.exe	84
PID 3512 wrote to memory of 3732	3512	Decrypted.exe	85
PID 3512 wrote to memory of 3732	3512	Decrypted.exe	85
PID 3512 wrote to memory of 3732	3512	Decrypted.exe	85
PID 3512 wrote to memory of 3732	3512	Decrypted.exe	85

C:\Users\Admin\AppData\Local\Temp\a5c337b9a5108d6172cbca8867b42afa_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\a5c337b9a5108d6172cbca8867b42afa_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1960
- C:\Users\Admin\AppData\Local\Temp\a5c337b9a5108d6172cbca8867b42afa_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\a5c337b9a5108d6172cbca8867b42afa_JaffaCakes118.exe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4232
- - C:\Users\Admin\AppData\Local\Temp\Decrypted.exe
    "C:\Users\Admin\AppData\Local\Temp\Decrypted.exe"
    3⤵
    - Boot or Logon Autostart Execution: Active Setup
    - Executes dropped EXE
    - Adds Run key to start application
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3512
  - - C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      4⤵
      Boot or Logon Autostart Execution: Active Setup
      Adds Run key to start application
      System Location Discovery: System Language Discovery
      PID:5116
  - - C:\Windows\SysWOW64\explorer.exe
      explorer.exe
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of SetWindowsHookEx
      PID:3732

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

1

T1012

System Information Discovery

2

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\Decrypted.exe

Filesize
19KB

MD5
dc2282dcfe443e577797391c58388f77

SHA1
54fe662a36204f6bde581537fa8431013b1a7a22

SHA256
08f265da5941c23c2869d05c563bf5aa65f7a4b4e54b607b8864e49b32466f8d

SHA512
e14f107a00520975385c8324dfc7b784e0335721a801dedfbfeb2d867e8c67b6ddd9cd360709d29f12fdabc7da2dc21baed1725f2d42689769a6660f91febac5

Download Submit
memory/3512-15-0x0000000000C80000-0x0000000000C95000-memory.dmp

Filesize
84KB

Download
memory/3512-27-0x0000000000C80000-0x0000000000C95000-memory.dmp

Filesize
84KB

Download
memory/3732-26-0x0000000000C80000-0x0000000000C95000-memory.dmp

Filesize
84KB

Download
memory/3732-29-0x0000000000C80000-0x0000000000C95000-memory.dmp

Filesize
84KB

Download
memory/4232-3-0x0000000000400000-0x0000000000408000-memory.dmp

Filesize
32KB

Download
memory/4232-5-0x0000000000400000-0x0000000000408000-memory.dmp

Filesize
32KB

Download
memory/4232-17-0x0000000000400000-0x0000000000408000-memory.dmp

Filesize
32KB

Download
memory/5116-24-0x0000000000C80000-0x0000000000C95000-memory.dmp

Filesize
84KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads