ac81f6e6887bcc1f6bbced0adce7f7a4c49c774c81a522b2faef74f7ecbfa7d4

Analysis

max time kernel
150s
max time network
124s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
12-08-2024 06:59

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General

Target

8dc2bc892ba1f2f7f25a9e9bcfaa4def_JaffaCakes118.exe
Size

342KB
MD5

8dc2bc892ba1f2f7f25a9e9bcfaa4def
SHA1

74cd24917e9ce5f1c2cb86bcd992ba8b86919e13
SHA256

ac81f6e6887bcc1f6bbced0adce7f7a4c49c774c81a522b2faef74f7ecbfa7d4
SHA512

3dd590a4455b707f7ae82335c451e9b6d7fa0ccf5661a9d2f85a2899cac017805b96b6314dd00ad3dcecdf930928020b121c9cd16f11fc1e7ca6465b6deac35d
SSDEEP

6144:J6gJbaRkNJvY2k0bsRkcQRkfIwps+69yV9Goa0ixEHzBmcrBlVZU+LF6CBPG:nbm8qN0bFciRwf69GxiKTBvVZJG

Score

10^/10

aspackv2 discovery persistence upx

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe C:\\Windows\\system32\\fservice.exe"	services.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe C:\\Windows\\system32\\fservice.exe"	8dc2bc892ba1f2f7f25a9e9bcfaa4def_JaffaCakes118.exe

Adds policy Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	8dc2bc892ba1f2f7f25a9e9bcfaa4def_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\DirectX For Microsoft® Windows = "C:\\Windows\\system32\\fservice.exe"	8dc2bc892ba1f2f7f25a9e9bcfaa4def_JaffaCakes118.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	services.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\DirectX For Microsoft® Windows = "C:\\Windows\\system32\\fservice.exe"	services.exe

Boot or Logon Autostart Execution: Active Setup 2 TTPs 5 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\{5Y99AE78-58TT-11dW-BE53-Y67078979Y}\	services.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5Y99AE78-58TT-11dW-BE53-Y67078979Y}\StubPath = "C:\\Windows\\system\\sservice.exe"	services.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5Y99AE78-58TT-11dW-BE53-Y67078979Y}	8dc2bc892ba1f2f7f25a9e9bcfaa4def_JaffaCakes118.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5Y99AE78-58TT-11dW-BE53-Y67078979Y}\	8dc2bc892ba1f2f7f25a9e9bcfaa4def_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5Y99AE78-58TT-11dW-BE53-Y67078979Y}\StubPath = "C:\\Windows\\system\\sservice.exe"	8dc2bc892ba1f2f7f25a9e9bcfaa4def_JaffaCakes118.exe

ASPack v2.12-2.42 1 IoCs

Detects executables packed with ASPack v2.12-2.42

aspackv2

resource	yara_rule
behavioral2/files/0x00080000000234cb-21.dat	aspack_v212_v242

Executes dropped EXE 2 IoCs

pid	Process
2804	fservice.exe
4044	services.exe

Loads dropped DLL 5 IoCs

pid	Process
4044	services.exe
4044	services.exe
4044	services.exe
2804	fservice.exe
4864	8dc2bc892ba1f2f7f25a9e9bcfaa4def_JaffaCakes118.exe

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4864-0-0x0000000000400000-0x00000000005F9000-memory.dmp	upx
behavioral2/files/0x00090000000234b1-7.dat	upx
behavioral2/memory/2804-9-0x0000000000400000-0x00000000005F9000-memory.dmp	upx
behavioral2/memory/2804-41-0x0000000000400000-0x00000000005F9000-memory.dmp	upx
behavioral2/memory/4864-43-0x0000000000400000-0x00000000005F9000-memory.dmp	upx
behavioral2/memory/4864-46-0x0000000000400000-0x00000000005F9000-memory.dmp	upx
behavioral2/memory/4044-50-0x0000000000400000-0x00000000005F9000-memory.dmp	upx
behavioral2/memory/4044-48-0x0000000000400000-0x00000000005F9000-memory.dmp	upx
behavioral2/memory/4044-52-0x0000000000400000-0x00000000005F9000-memory.dmp	upx
behavioral2/memory/4044-56-0x0000000000400000-0x00000000005F9000-memory.dmp	upx

Modifies WinLogon 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\	8dc2bc892ba1f2f7f25a9e9bcfaa4def_JaffaCakes118.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\	services.exe

Network Share Discovery 1 TTPs
Attempt to gather information on host network.
discovery

Network Share Discovery
T1135

Drops file in System32 directory 7 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\fservice.exe	8dc2bc892ba1f2f7f25a9e9bcfaa4def_JaffaCakes118.exe
File created	C:\Windows\SysWOW64\fservice.exe	fservice.exe
File opened for modification	C:\Windows\SysWOW64\fservice.exe	fservice.exe
File created	C:\Windows\SysWOW64\winkey.dll	services.exe
File created	C:\Windows\SysWOW64\reginv.dll	services.exe
File created	C:\Windows\SysWOW64\fservice.exe	services.exe
File created	C:\Windows\SysWOW64\fservice.exe	8dc2bc892ba1f2f7f25a9e9bcfaa4def_JaffaCakes118.exe

Drops file in Windows directory 7 IoCs

description	ioc	Process
File created	C:\Windows\system\sservice.exe	8dc2bc892ba1f2f7f25a9e9bcfaa4def_JaffaCakes118.exe
File opened for modification	C:\Windows\system\sservice.exe	8dc2bc892ba1f2f7f25a9e9bcfaa4def_JaffaCakes118.exe
File created	C:\Windows\services.exe	fservice.exe
File opened for modification	C:\Windows\services.exe	fservice.exe
File created	C:\Windows\system\sservice.exe	fservice.exe
File opened for modification	C:\Windows\system\sservice.exe	fservice.exe
File created	C:\Windows\system\sservice.exe	services.exe

System Location Discovery: System Language Discovery 1 TTPs 10 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	net1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fservice.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	NET.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	NET.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	NET.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	net1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	net1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8dc2bc892ba1f2f7f25a9e9bcfaa4def_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	services.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe
4044	services.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4044	services.exe
4044	services.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 4864 wrote to memory of 2804	4864	8dc2bc892ba1f2f7f25a9e9bcfaa4def_JaffaCakes118.exe	84
PID 4864 wrote to memory of 2804	4864	8dc2bc892ba1f2f7f25a9e9bcfaa4def_JaffaCakes118.exe	84
PID 4864 wrote to memory of 2804	4864	8dc2bc892ba1f2f7f25a9e9bcfaa4def_JaffaCakes118.exe	84
PID 2804 wrote to memory of 4044	2804	fservice.exe	87
PID 2804 wrote to memory of 4044	2804	fservice.exe	87
PID 2804 wrote to memory of 4044	2804	fservice.exe	87
PID 4044 wrote to memory of 972	4044	services.exe	88
PID 4044 wrote to memory of 972	4044	services.exe	88
PID 4044 wrote to memory of 972	4044	services.exe	88
PID 4044 wrote to memory of 4852	4044	services.exe	89
PID 4044 wrote to memory of 4852	4044	services.exe	89
PID 4044 wrote to memory of 4852	4044	services.exe	89
PID 4044 wrote to memory of 1624	4044	services.exe	90
PID 4044 wrote to memory of 1624	4044	services.exe	90
PID 4044 wrote to memory of 1624	4044	services.exe	90
PID 4864 wrote to memory of 1172	4864	8dc2bc892ba1f2f7f25a9e9bcfaa4def_JaffaCakes118.exe	94
PID 4864 wrote to memory of 1172	4864	8dc2bc892ba1f2f7f25a9e9bcfaa4def_JaffaCakes118.exe	94
PID 4864 wrote to memory of 1172	4864	8dc2bc892ba1f2f7f25a9e9bcfaa4def_JaffaCakes118.exe	94
PID 4852 wrote to memory of 320	4852	NET.exe	96
PID 4852 wrote to memory of 320	4852	NET.exe	96
PID 4852 wrote to memory of 320	4852	NET.exe	96
PID 972 wrote to memory of 928	972	NET.exe	97
PID 972 wrote to memory of 928	972	NET.exe	97
PID 972 wrote to memory of 928	972	NET.exe	97
PID 1624 wrote to memory of 844	1624	NET.exe	98
PID 1624 wrote to memory of 844	1624	NET.exe	98
PID 1624 wrote to memory of 844	1624	NET.exe	98

C:\Users\Admin\AppData\Local\Temp\8dc2bc892ba1f2f7f25a9e9bcfaa4def_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\8dc2bc892ba1f2f7f25a9e9bcfaa4def_JaffaCakes118.exe"
1⤵
- Modifies WinLogon for persistence
- Adds policy Run key to start application
- Boot or Logon Autostart Execution: Active Setup
- Loads dropped DLL
- Modifies WinLogon
- Drops file in System32 directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4864
- C:\Windows\SysWOW64\fservice.exe
  C:\Windows\system32\fservice.exe
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in System32 directory
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2804
- - C:\Windows\services.exe
    C:\Windows\services.exe -XP
    3⤵
    - Modifies WinLogon for persistence
    - Adds policy Run key to start application
    - Boot or Logon Autostart Execution: Active Setup
    - Executes dropped EXE
    - Loads dropped DLL
    - Modifies WinLogon
    - Drops file in System32 directory
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4044
  - - C:\Windows\SysWOW64\NET.exe
      NET STOP SharedAccess
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:972
    - - C:\Windows\SysWOW64\net1.exe
        
        C:\Windows\system32\net1 STOP SharedAccess
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:928
  - - C:\Windows\SysWOW64\NET.exe
      NET STOP srservice
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:4852
    - - C:\Windows\SysWOW64\net1.exe
        
        C:\Windows\system32\net1 STOP srservice
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:320
  - - C:\Windows\SysWOW64\NET.exe
      NET STOP navapsvc
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:1624
    - - C:\Windows\SysWOW64\net1.exe
        
        C:\Windows\system32\net1 STOP navapsvc
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:844
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\8dc2bc892ba1f2f7f25a9e9bcfaa4def_JaffaCakes118.exe.bat
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1172

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Active Setup

T1547.014

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Active Setup

T1547.014

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Network Share Discovery

T1135

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\8dc2bc892ba1f2f7f25a9e9bcfaa4def_JaffaCakes118.exe.bat

Filesize
133B

MD5
0b7c66eccc9dbb195011ce34222c436d

SHA1
9f14df727c956da6ba5c0144d63ba337e7c49134

SHA256
49d8aea181fc939bef209b17f133f8c683b6cc8b4a0f5be7700db58019eb5aeb

SHA512
93f966ca6aca681551fb81033ca8131052b3919991efa595b7709ba226ba011cecfb8640b8ba772afb9ca3bf505fb3e8f464083e0f0f94d0667ef54a8b82f77f

Download Submit
C:\Windows\SysWOW64\fservice.exe

Filesize
342KB

MD5
8dc2bc892ba1f2f7f25a9e9bcfaa4def

SHA1
74cd24917e9ce5f1c2cb86bcd992ba8b86919e13

SHA256
ac81f6e6887bcc1f6bbced0adce7f7a4c49c774c81a522b2faef74f7ecbfa7d4

SHA512
3dd590a4455b707f7ae82335c451e9b6d7fa0ccf5661a9d2f85a2899cac017805b96b6314dd00ad3dcecdf930928020b121c9cd16f11fc1e7ca6465b6deac35d

Download Submit
C:\Windows\SysWOW64\reginv.dll

Filesize
20KB

MD5
904f3b552d0b762edb4520163d12d3cf

SHA1
5cca6b60732fe12d5d0d33e2fb2eb0c9004b9a8a

SHA256
6f2c2b2c8733eac6ca9fb1e95804ab08fcff20caa9e2a59b300400f18900b874

SHA512
14a8855ea04cf0bd9508bca077995eb4700988043ae63b8c320762904f415b0a29de5f9bfd8f1c1b9e1cd76700e6e988569b33f14c8a3ed16fa6eade10ab40a4

Download Submit
C:\Windows\SysWOW64\winkey.dll

Filesize
16KB

MD5
d910659cca6a1650c10ff263c8a10fe7

SHA1
d38dbccb50b63430a51d8f6df2a6c4d23677cff0

SHA256
5b308dfdd00dadc887a56f90e05ebfa9963be0c463d524e2ddd8680cb810d2d8

SHA512
30c2e455478d270fc1800d251e36014f16c5e7dd9e67c1c1b0f5d4e6070fbd2875c6706efff710b83897704cefb10c7ce1b5c993548568c1f142e5b5c8d44df4

Download Submit
memory/2804-35-0x0000000010000000-0x0000000010008000-memory.dmp

Filesize
32KB

Download
memory/2804-10-0x00000000009E0000-0x00000000009E1000-memory.dmp

Filesize
4KB

Download
memory/2804-41-0x0000000000400000-0x00000000005F9000-memory.dmp

Filesize
2.0MB

Download
memory/2804-39-0x0000000010000000-0x0000000010008000-memory.dmp

Filesize
32KB

Download
memory/2804-9-0x0000000000400000-0x00000000005F9000-memory.dmp

Filesize
2.0MB

Download
memory/4044-50-0x0000000000400000-0x00000000005F9000-memory.dmp

Filesize
2.0MB

Download
memory/4044-19-0x0000000002570000-0x0000000002571000-memory.dmp

Filesize
4KB

Download
memory/4044-34-0x00000000025E1000-0x00000000025E2000-memory.dmp

Filesize
4KB

Download
memory/4044-23-0x0000000010000000-0x000000001000B000-memory.dmp

Filesize
44KB

Download
memory/4044-33-0x00000000025E0000-0x00000000025E8000-memory.dmp

Filesize
32KB

Download
memory/4044-56-0x0000000000400000-0x00000000005F9000-memory.dmp

Filesize
2.0MB

Download
memory/4044-52-0x0000000000400000-0x00000000005F9000-memory.dmp

Filesize
2.0MB

Download
memory/4044-51-0x0000000002570000-0x0000000002571000-memory.dmp

Filesize
4KB

Download
memory/4044-48-0x0000000000400000-0x00000000005F9000-memory.dmp

Filesize
2.0MB

Download
memory/4044-49-0x0000000010000000-0x000000001000B000-memory.dmp

Filesize
44KB

Download
memory/4864-0-0x0000000000400000-0x00000000005F9000-memory.dmp

Filesize
2.0MB

Download
memory/4864-1-0x0000000000DA0000-0x0000000000DA1000-memory.dmp

Filesize
4KB

Download
memory/4864-45-0x0000000010000000-0x0000000010008000-memory.dmp

Filesize
32KB

Download
memory/4864-46-0x0000000000400000-0x00000000005F9000-memory.dmp

Filesize
2.0MB

Download
memory/4864-42-0x0000000010000000-0x0000000010008000-memory.dmp

Filesize
32KB

Download
memory/4864-43-0x0000000000400000-0x00000000005F9000-memory.dmp

Filesize
2.0MB

Download