xtremerat | a1e54b743426f32cf96dcb45aa6becb44fc7de9f9b73154cf9188335abfd1e20

General

Target

7a917fd27a6e574cc4d722049e2e47f1_JaffaCakes118.exe
Size

67KB
MD5

7a917fd27a6e574cc4d722049e2e47f1
SHA1

586d1e930193e58ecf80277a5fad52d5b0ad24f3
SHA256

a1e54b743426f32cf96dcb45aa6becb44fc7de9f9b73154cf9188335abfd1e20
SHA512

12e580195a311a13d5cf04964d06e78935660208e4a2bf67d9cb055c0161e9d6ab541d5e373c0d24d91030a6a118037f38671dbf1b14b10dd091b8c4b1dfb9a1
SSDEEP

768:G8m1Sq4NQErBsH1tzoisBKQI6dObAG/dq7uW29Ifnca/yyR+P2ujfGiCKPA+7XoJ:0sq+QV4rObAdCWpf/y+QozNwi6o1ZD

Score

10^/10

xtremerat discovery persistence rat spyware

Malware Config

Extracted

Family

xtremerat

C2

silent-hilll.no-ip.biz

Signatures

Detect XtremeRAT payload 3 IoCs

resource	yara_rule
behavioral2/memory/3068-0-0x0000000010000000-0x000000001004A000-memory.dmp	family_xtremerat
behavioral2/memory/3068-6-0x0000000010000000-0x000000001004A000-memory.dmp	family_xtremerat
behavioral2/memory/4784-7-0x0000000010000000-0x000000001004A000-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
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

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{5460C4DF-B266-909E-CB58-E32B79832EB2}	7a917fd27a6e574cc4d722049e2e47f1_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5460C4DF-B266-909E-CB58-E32B79832EB2}\StubPath = "C:\\Windows\\system32\\msn\\msn.exe restart"	7a917fd27a6e574cc4d722049e2e47f1_JaffaCakes118.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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	7a917fd27a6e574cc4d722049e2e47f1_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\HKLM = "C:\\Windows\\system32\\msn\\msn.exe"	7a917fd27a6e574cc4d722049e2e47f1_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HKCU = "C:\\Windows\\system32\\msn\\msn.exe"	7a917fd27a6e574cc4d722049e2e47f1_JaffaCakes118.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\msn\msn.exe	7a917fd27a6e574cc4d722049e2e47f1_JaffaCakes118.exe
File created	C:\Windows\SysWOW64\msn\msn.exe	7a917fd27a6e574cc4d722049e2e47f1_JaffaCakes118.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\182erreur.txt.txt.exe	7a917fd27a6e574cc4d722049e2e47f1_JaffaCakes118.exe
File created	C:\Windows\182erreur.txt.txt	7a917fd27a6e574cc4d722049e2e47f1_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
1352	3068	WerFault.exe	84
1336	3068	WerFault.exe	84

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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	7a917fd27a6e574cc4d722049e2e47f1_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	NOTEPAD.EXE

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000_Classes\Local Settings	7a917fd27a6e574cc4d722049e2e47f1_JaffaCakes118.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1236	NOTEPAD.EXE

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4784	7a917fd27a6e574cc4d722049e2e47f1_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 4784 wrote to memory of 3068	4784	7a917fd27a6e574cc4d722049e2e47f1_JaffaCakes118.exe	84
PID 4784 wrote to memory of 3068	4784	7a917fd27a6e574cc4d722049e2e47f1_JaffaCakes118.exe	84
PID 4784 wrote to memory of 3068	4784	7a917fd27a6e574cc4d722049e2e47f1_JaffaCakes118.exe	84
PID 4784 wrote to memory of 3068	4784	7a917fd27a6e574cc4d722049e2e47f1_JaffaCakes118.exe	84
PID 4784 wrote to memory of 1236	4784	7a917fd27a6e574cc4d722049e2e47f1_JaffaCakes118.exe	87
PID 4784 wrote to memory of 1236	4784	7a917fd27a6e574cc4d722049e2e47f1_JaffaCakes118.exe	87
PID 4784 wrote to memory of 1236	4784	7a917fd27a6e574cc4d722049e2e47f1_JaffaCakes118.exe	87

C:\Users\Admin\AppData\Local\Temp\7a917fd27a6e574cc4d722049e2e47f1_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\7a917fd27a6e574cc4d722049e2e47f1_JaffaCakes118.exe"
1⤵
- Boot or Logon Autostart Execution: Active Setup
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4784
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3068
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3068 -s 480
    3⤵
    - Program crash
    PID:1352
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3068 -s 476
    3⤵
    - Program crash
    PID:1336
- C:\Windows\SysWOW64\NOTEPAD.EXE
  "C:\Windows\system32\NOTEPAD.EXE" C:\Windows\182erreur.txt.txt
  2⤵
  - System Location Discovery: System Language Discovery
  - Opens file in notepad (likely ransom note)
  PID:1236

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3068 -ip 3068
1⤵
PID:2240

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 3068 -ip 3068
1⤵
PID:3748

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:\Windows\182erreur.txt.txt

Filesize
32B

MD5
607cfd66d4ba80bec5ddaa6a3f7312da

SHA1
df0a8f6e7a3c9db38e5ecf1fc3569cf833852b9f

SHA256
838f38b7c1ffe015d200affbefad6f4bd0440db576c14b1ce66b7a58a011d221

SHA512
22de106b628043a73ffddfabe973bb4504f0e97714d316e2ea86c2e70c2d5a67dc7bf650e0fdffbc7fa77c94c6a9934a3e2702abb97767e96519805637b44670

Download Submit
memory/3068-0-0x0000000010000000-0x000000001004A000-memory.dmp

Filesize
296KB

Download
memory/3068-6-0x0000000010000000-0x000000001004A000-memory.dmp

Filesize
296KB

Download
memory/4784-7-0x0000000010000000-0x000000001004A000-memory.dmp

Filesize
296KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads