metasploit | 937513ddd7983c71724dfa5ef40da0fe5512a46953896750167b1ea84e5bb7b5

General

Target

f802d4ad5947d74a6044505bac255248_JaffaCakes118.exe
Size

186KB
MD5

f802d4ad5947d74a6044505bac255248
SHA1

e048c6ce9e14341bac366f44ce80b517b0531157
SHA256

937513ddd7983c71724dfa5ef40da0fe5512a46953896750167b1ea84e5bb7b5
SHA512

32331d0c0e05d1a048b935bdd0251502f7bb3a010ae343da6ac43607cb2f13e880a5771df9cc4aa7c25770c36b06852556e14c58ef4353b2af35862828a35875
SSDEEP

3072:FNU0i8jvbw1C2/b5uoa1b1f0n2kbN/1Bir26GfQJENU0w:j3PACOTwr8Ym3

Score

10^/10

metasploit backdoor discovery persistence trojan upx

Malware Config

Extracted

Family

metasploit

Version

encoder/call4_dword_xor

Signatures

MetaSploit
Detected malicious payload which is part of the Metasploit Framework, likely generated with msfvenom or similar.
trojan backdoor metasploit

Executes dropped EXE 2 IoCs

pid	Process
4684	csrss.exe
2564	csrss.exe

Adds Run key to start application 2 TTPs 1 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\Remote Registry Service = "csrss.exe"	f802d4ad5947d74a6044505bac255248_JaffaCakes118.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4932 set thread context of 824	4932	f802d4ad5947d74a6044505bac255248_JaffaCakes118.exe	84
PID 4684 set thread context of 2564	4684	csrss.exe	86

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4932-0-0x0000000000400000-0x0000000000430000-memory.dmp	upx
behavioral2/memory/4932-4-0x0000000000400000-0x0000000000430000-memory.dmp	upx
behavioral2/files/0x0008000000023456-11.dat	upx
behavioral2/memory/4684-23-0x0000000000400000-0x0000000000430000-memory.dmp	upx

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\csrss.exe	f802d4ad5947d74a6044505bac255248_JaffaCakes118.exe
File opened for modification	C:\Windows\csrss.exe	f802d4ad5947d74a6044505bac255248_JaffaCakes118.exe

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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f802d4ad5947d74a6044505bac255248_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f802d4ad5947d74a6044505bac255248_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrss.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrss.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4932	f802d4ad5947d74a6044505bac255248_JaffaCakes118.exe
4684	csrss.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 4932 wrote to memory of 824	4932	f802d4ad5947d74a6044505bac255248_JaffaCakes118.exe	84
PID 4932 wrote to memory of 824	4932	f802d4ad5947d74a6044505bac255248_JaffaCakes118.exe	84
PID 4932 wrote to memory of 824	4932	f802d4ad5947d74a6044505bac255248_JaffaCakes118.exe	84
PID 4932 wrote to memory of 824	4932	f802d4ad5947d74a6044505bac255248_JaffaCakes118.exe	84
PID 4932 wrote to memory of 824	4932	f802d4ad5947d74a6044505bac255248_JaffaCakes118.exe	84
PID 4932 wrote to memory of 824	4932	f802d4ad5947d74a6044505bac255248_JaffaCakes118.exe	84
PID 4932 wrote to memory of 824	4932	f802d4ad5947d74a6044505bac255248_JaffaCakes118.exe	84
PID 4932 wrote to memory of 824	4932	f802d4ad5947d74a6044505bac255248_JaffaCakes118.exe	84
PID 4932 wrote to memory of 824	4932	f802d4ad5947d74a6044505bac255248_JaffaCakes118.exe	84
PID 824 wrote to memory of 4684	824	f802d4ad5947d74a6044505bac255248_JaffaCakes118.exe	85
PID 824 wrote to memory of 4684	824	f802d4ad5947d74a6044505bac255248_JaffaCakes118.exe	85
PID 824 wrote to memory of 4684	824	f802d4ad5947d74a6044505bac255248_JaffaCakes118.exe	85
PID 4684 wrote to memory of 2564	4684	csrss.exe	86
PID 4684 wrote to memory of 2564	4684	csrss.exe	86
PID 4684 wrote to memory of 2564	4684	csrss.exe	86
PID 4684 wrote to memory of 2564	4684	csrss.exe	86
PID 4684 wrote to memory of 2564	4684	csrss.exe	86
PID 4684 wrote to memory of 2564	4684	csrss.exe	86
PID 4684 wrote to memory of 2564	4684	csrss.exe	86
PID 4684 wrote to memory of 2564	4684	csrss.exe	86
PID 4684 wrote to memory of 2564	4684	csrss.exe	86

C:\Users\Admin\AppData\Local\Temp\f802d4ad5947d74a6044505bac255248_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f802d4ad5947d74a6044505bac255248_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4932
- C:\Users\Admin\AppData\Local\Temp\f802d4ad5947d74a6044505bac255248_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\f802d4ad5947d74a6044505bac255248_JaffaCakes118.exe"
  2⤵
  - Adds Run key to start application
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:824
- - C:\Windows\csrss.exe
    "C:\Windows\csrss.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4684
  - - C:\Windows\csrss.exe
      "C:\Windows\csrss.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:2564

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

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\csrss.exe

Filesize
186KB

MD5
f802d4ad5947d74a6044505bac255248

SHA1
e048c6ce9e14341bac366f44ce80b517b0531157

SHA256
937513ddd7983c71724dfa5ef40da0fe5512a46953896750167b1ea84e5bb7b5

SHA512
32331d0c0e05d1a048b935bdd0251502f7bb3a010ae343da6ac43607cb2f13e880a5771df9cc4aa7c25770c36b06852556e14c58ef4353b2af35862828a35875

Download Submit
memory/824-17-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/824-6-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/824-7-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/824-3-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/2564-21-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/2564-22-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/2564-24-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/2564-25-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/2564-38-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/4684-23-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/4932-4-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/4932-0-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads