55debfd8fa5aec78c05795c8e07e173ee25e513853cf8527b5706fefb43d25b3

General

Target

429298ccfa4668eedbc86580c36febe2_JaffaCakes118.exe
Size

1.6MB
MD5

429298ccfa4668eedbc86580c36febe2
SHA1

784216dae93eca0f1114cc102777ad08ea1a39da
SHA256

55debfd8fa5aec78c05795c8e07e173ee25e513853cf8527b5706fefb43d25b3
SHA512

b4b154317fa62fd09533003b4143346e0c912b8184b846a3a3f49473ef64508afae43f66184c534d059ec4b777872c2713822d03baddf40a4c64775f040abec9
SSDEEP

49152:KZqFJ5S4vmQsOmhp92EZgxKGAte5ZPZ2e:oqFJ5S4vEOmhp92jKjUZp

Score

8^/10

persistence upx

Malware Config

Signatures

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\{28ABC5C0-4FCB-11CF-AAX5-81CX1C635612}	windows.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{28ABC5C0-4FCB-11CF-AAX5-81CX1C635612}\StubPath = "C:\\RECYCLER\\S-1-5-21-1482476501-1644491937-682003330-1013\\smartmgr.exe"	windows.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{28ABC5C0-4FCB-11CF-AAX5-81CX1C635612}	csrss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{28ABC5C0-4FCB-11CF-AAX5-81CX1C635612}\StubPath = "C:\\RECYCLER\\S-1-5-21-1482476501-1644491937-682003330-1013\\smartmgr.exe"	csrss.exe

Executes dropped EXE 2 IoCs

pid	Process
3024	csrss.exe
1844	windows.exe

Loads dropped DLL 4 IoCs

pid	Process
2968	429298ccfa4668eedbc86580c36febe2_JaffaCakes118.exe
2968	429298ccfa4668eedbc86580c36febe2_JaffaCakes118.exe
2968	429298ccfa4668eedbc86580c36febe2_JaffaCakes118.exe
2968	429298ccfa4668eedbc86580c36febe2_JaffaCakes118.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2968-2-0x0000000000400000-0x0000000000436000-memory.dmp	upx
behavioral1/files/0x0008000000016140-9.dat	upx
behavioral1/memory/3024-11-0x0000000000400000-0x0000000000436000-memory.dmp	upx
behavioral1/memory/1844-28-0x0000000000400000-0x0000000000436000-memory.dmp	upx
behavioral1/memory/2968-18-0x0000000000400000-0x0000000000436000-memory.dmp	upx
behavioral1/memory/3024-79-0x0000000000400000-0x0000000000436000-memory.dmp	upx

Adds Run key to start application 2 TTPs 3 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\C:\Users\Admin\AppData\Local\Temp\429298ccfa4668eedbc86580c36febe2_JaffaCakes118.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\429298ccfa4668eedbc86580c36febe2_JaffaCakes118.exe"	429298ccfa4668eedbc86580c36febe2_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\C:\WINDOWS\system\windows.exe = "C:\\WINDOWS\\system\\windows.exe"	windows.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\C:\WINDOWS\system\csrss.exe = "C:\\WINDOWS\\system\\csrss.exe"	csrss.exe

Drops desktop.ini file(s) 3 IoCs

description	ioc	Process
File created	C:\RECYCLER\S-1-5-21-1482476501-1644491937-682003330-1013\Desktop.ini	windows.exe
File opened for modification	C:\RECYCLER\S-1-5-21-1482476501-1644491937-682003330-1013\Desktop.ini	windows.exe
File created	C:\RECYCLER\S-1-5-21-1482476501-1644491937-682003330-1013\Desktop.ini	csrss.exe

Drops file in Windows directory 14 IoCs

description	ioc	Process
File created	C:\WINDOWS\system\csrss.exe	429298ccfa4668eedbc86580c36febe2_JaffaCakes118.exe
File created	C:\WINDOWS\system\windows.exe	windows.exe
File created	C:\WINDOWS\system\csrss.exe	windows.exe
File created	C:\WINDOWS\system\windows.exe	429298ccfa4668eedbc86580c36febe2_JaffaCakes118.exe
File opened for modification	C:\WINDOWS\system\csrss.exe	csrss.exe
File created	C:\WINDOWS\system\windows.exe	csrss.exe
File opened for modification	C:\WINDOWS\windowsxp.exe	csrss.exe
File opened for modification	C:\WINDOWS\system\windows.exe	429298ccfa4668eedbc86580c36febe2_JaffaCakes118.exe
File created	C:\WINDOWS\windowsxp.exe	windows.exe
File opened for modification	C:\WINDOWS\windowsxp.exe	windows.exe
File opened for modification	C:\WINDOWS\system\windows.exe	windows.exe
File opened for modification	C:\WINDOWS\system\csrss.exe	windows.exe
File created	C:\WINDOWS\system\csrss.exe	csrss.exe
File created	C:\WINDOWS\windowsxp.exe	csrss.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2968	429298ccfa4668eedbc86580c36febe2_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2968 wrote to memory of 3024	2968	429298ccfa4668eedbc86580c36febe2_JaffaCakes118.exe	30
PID 2968 wrote to memory of 3024	2968	429298ccfa4668eedbc86580c36febe2_JaffaCakes118.exe	30
PID 2968 wrote to memory of 3024	2968	429298ccfa4668eedbc86580c36febe2_JaffaCakes118.exe	30
PID 2968 wrote to memory of 3024	2968	429298ccfa4668eedbc86580c36febe2_JaffaCakes118.exe	30
PID 2968 wrote to memory of 1844	2968	429298ccfa4668eedbc86580c36febe2_JaffaCakes118.exe	31
PID 2968 wrote to memory of 1844	2968	429298ccfa4668eedbc86580c36febe2_JaffaCakes118.exe	31
PID 2968 wrote to memory of 1844	2968	429298ccfa4668eedbc86580c36febe2_JaffaCakes118.exe	31
PID 2968 wrote to memory of 1844	2968	429298ccfa4668eedbc86580c36febe2_JaffaCakes118.exe	31

C:\Users\Admin\AppData\Local\Temp\429298ccfa4668eedbc86580c36febe2_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\429298ccfa4668eedbc86580c36febe2_JaffaCakes118.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2968
- C:\WINDOWS\system\csrss.exe
  "C:\WINDOWS\system\csrss.exe" /para
  2⤵
  - Boot or Logon Autostart Execution: Active Setup
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops desktop.ini file(s)
  - Drops file in Windows directory
  PID:3024
- C:\WINDOWS\system\windows.exe
  "C:\WINDOWS\system\windows.exe" /para
  2⤵
  - Boot or Logon Autostart Execution: Active Setup
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops desktop.ini file(s)
  - Drops file in Windows directory
  PID:1844

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\system\csrss.exe

Filesize
1.6MB

MD5
429298ccfa4668eedbc86580c36febe2

SHA1
784216dae93eca0f1114cc102777ad08ea1a39da

SHA256
55debfd8fa5aec78c05795c8e07e173ee25e513853cf8527b5706fefb43d25b3

SHA512
b4b154317fa62fd09533003b4143346e0c912b8184b846a3a3f49473ef64508afae43f66184c534d059ec4b777872c2713822d03baddf40a4c64775f040abec9

Download Submit
memory/1844-28-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download
memory/2968-2-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download
memory/2968-10-0x00000000003C0000-0x00000000003F6000-memory.dmp

Filesize
216KB

Download
memory/2968-18-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download
memory/3024-11-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download
memory/3024-79-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads