latentbot | c4301978bfe1f1e601b8a9ccc63f2fbc4590b74bb46d6a95ed26f72a12556daa

Analysis

max time kernel
150s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
08-10-2024 02:38

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General

Target

c4301978bfe1f1e601b8a9ccc63f2fbc4590b74bb46d6a95ed26f72a12556daa.exe
Size

342KB
MD5

1a390ce9a38656bacbab2c736b376086
SHA1

8ed6c5c558ccef8562e9b414efc258933e60ea6f
SHA256

c4301978bfe1f1e601b8a9ccc63f2fbc4590b74bb46d6a95ed26f72a12556daa
SHA512

a42b3754c2e1ebba6c2cbae61825243f93c3d1322c08c924003a53af10c9fbc9c0f9d07854dae9a1cffe2ea99986cdb0250c6c9989abbd65c8c6c7d7eaf44a8a
SSDEEP

6144:9Rqmpp+amNOGokzLyM9tsLAitQo6tzOKkzIt8gKyfjxfR9D2j4yXoQHtVee:DqmpplpGoGL3etQoMiXM8gxf/Sj4yXlu

Score

10^/10

latentbot aspackv2 discovery persistence trojan upx

Malware Config

Extracted

Family

latentbot

lesperez1337.zapto.org

Signatures

LatentBot
Modular trojan written in Delphi which has been in-the-wild since 2013.
trojan latentbot

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"	c4301978bfe1f1e601b8a9ccc63f2fbc4590b74bb46d6a95ed26f72a12556daa.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	c4301978bfe1f1e601b8a9ccc63f2fbc4590b74bb46d6a95ed26f72a12556daa.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\DirectX For Microsoft® Windows = "C:\\Windows\\system32\\fservice.exe"	c4301978bfe1f1e601b8a9ccc63f2fbc4590b74bb46d6a95ed26f72a12556daa.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
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}	c4301978bfe1f1e601b8a9ccc63f2fbc4590b74bb46d6a95ed26f72a12556daa.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5Y99AE78-58TT-11dW-BE53-Y67078979Y}\	c4301978bfe1f1e601b8a9ccc63f2fbc4590b74bb46d6a95ed26f72a12556daa.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5Y99AE78-58TT-11dW-BE53-Y67078979Y}\StubPath = "C:\\Windows\\system\\sservice.exe"	c4301978bfe1f1e601b8a9ccc63f2fbc4590b74bb46d6a95ed26f72a12556daa.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5Y99AE78-58TT-11dW-BE53-Y67078979Y}\	services.exe

ASPack v2.12-2.42 1 IoCs

Detects executables packed with ASPack v2.12-2.42

aspackv2

resource	yara_rule
behavioral2/files/0x0009000000023c82-21.dat	aspack_v212_v242

Executes dropped EXE 2 IoCs

pid	Process
2788	fservice.exe
1092	services.exe

Loads dropped DLL 5 IoCs

pid	Process
1092	services.exe
1092	services.exe
1092	services.exe
2788	fservice.exe
1432	c4301978bfe1f1e601b8a9ccc63f2fbc4590b74bb46d6a95ed26f72a12556daa.exe

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\	c4301978bfe1f1e601b8a9ccc63f2fbc4590b74bb46d6a95ed26f72a12556daa.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\	services.exe

Drops file in System32 directory 7 IoCs

description	ioc	Process
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	c4301978bfe1f1e601b8a9ccc63f2fbc4590b74bb46d6a95ed26f72a12556daa.exe
File opened for modification	C:\Windows\SysWOW64\fservice.exe	c4301978bfe1f1e601b8a9ccc63f2fbc4590b74bb46d6a95ed26f72a12556daa.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

UPX packed file 20 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1432-0-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/files/0x000c000000023b9c-6.dat	upx
behavioral2/memory/2788-9-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/2788-33-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/1432-38-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/1092-40-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/1092-42-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/1092-44-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/1092-46-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/1092-48-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/1092-50-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/1092-52-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/1092-54-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/1092-56-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/1092-58-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/1092-60-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/1092-62-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/1092-64-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/1092-66-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/1092-68-0x0000000000400000-0x00000000005FC000-memory.dmp	upx

Drops file in Windows directory 7 IoCs

description	ioc	Process
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
File created	C:\Windows\system\sservice.exe	c4301978bfe1f1e601b8a9ccc63f2fbc4590b74bb46d6a95ed26f72a12556daa.exe
File opened for modification	C:\Windows\system\sservice.exe	c4301978bfe1f1e601b8a9ccc63f2fbc4590b74bb46d6a95ed26f72a12556daa.exe
File created	C:\Windows\services.exe	fservice.exe
File opened for modification	C:\Windows\services.exe	fservice.exe

System Location Discovery: System Language Discovery 1 TTPs 8 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	c4301978bfe1f1e601b8a9ccc63f2fbc4590b74bb46d6a95ed26f72a12556daa.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fservice.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	services.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	cmd.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe
1092	services.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1092	services.exe
1092	services.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1432 wrote to memory of 2788	1432	c4301978bfe1f1e601b8a9ccc63f2fbc4590b74bb46d6a95ed26f72a12556daa.exe	84
PID 1432 wrote to memory of 2788	1432	c4301978bfe1f1e601b8a9ccc63f2fbc4590b74bb46d6a95ed26f72a12556daa.exe	84
PID 1432 wrote to memory of 2788	1432	c4301978bfe1f1e601b8a9ccc63f2fbc4590b74bb46d6a95ed26f72a12556daa.exe	84
PID 2788 wrote to memory of 1092	2788	fservice.exe	86
PID 2788 wrote to memory of 1092	2788	fservice.exe	86
PID 2788 wrote to memory of 1092	2788	fservice.exe	86
PID 1092 wrote to memory of 764	1092	services.exe	87
PID 1092 wrote to memory of 764	1092	services.exe	87
PID 1092 wrote to memory of 764	1092	services.exe	87
PID 1092 wrote to memory of 1172	1092	services.exe	88
PID 1092 wrote to memory of 1172	1092	services.exe	88
PID 1092 wrote to memory of 1172	1092	services.exe	88
PID 1432 wrote to memory of 2852	1432	c4301978bfe1f1e601b8a9ccc63f2fbc4590b74bb46d6a95ed26f72a12556daa.exe	91
PID 1432 wrote to memory of 2852	1432	c4301978bfe1f1e601b8a9ccc63f2fbc4590b74bb46d6a95ed26f72a12556daa.exe	91
PID 1432 wrote to memory of 2852	1432	c4301978bfe1f1e601b8a9ccc63f2fbc4590b74bb46d6a95ed26f72a12556daa.exe	91
PID 1172 wrote to memory of 4004	1172	NET.exe	92
PID 1172 wrote to memory of 4004	1172	NET.exe	92
PID 1172 wrote to memory of 4004	1172	NET.exe	92
PID 764 wrote to memory of 1600	764	NET.exe	94
PID 764 wrote to memory of 1600	764	NET.exe	94
PID 764 wrote to memory of 1600	764	NET.exe	94

C:\Users\Admin\AppData\Local\Temp\c4301978bfe1f1e601b8a9ccc63f2fbc4590b74bb46d6a95ed26f72a12556daa.exe
"C:\Users\Admin\AppData\Local\Temp\c4301978bfe1f1e601b8a9ccc63f2fbc4590b74bb46d6a95ed26f72a12556daa.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:1432
- 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:2788
- - 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:1092
  - - C:\Windows\SysWOW64\NET.exe
      NET STOP srservice
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:764
    - - C:\Windows\SysWOW64\net1.exe
        
        C:\Windows\system32\net1 STOP srservice
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:1600
  - - C:\Windows\SysWOW64\NET.exe
      NET STOP navapsvc
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:1172
    - - C:\Windows\SysWOW64\net1.exe
        
        C:\Windows\system32\net1 STOP navapsvc
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:4004
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\c4301978bfe1f1e601b8a9ccc63f2fbc4590b74bb46d6a95ed26f72a12556daa.exe.bat
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2852

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\c4301978bfe1f1e601b8a9ccc63f2fbc4590b74bb46d6a95ed26f72a12556daa.exe.bat

Filesize
133B

MD5
efb30faa7ada928096545b08ba20289f

SHA1
eeb01848f786f22b4331723130032693066e5176

SHA256
715cf8784160253a4eb1c3bbe024cb96d47c13203690ca5b2e63f511790b4d64

SHA512
a9e51d2b69f046c5d4664c7f9ef065e4367bcc82f36af96cfac95f55dd7d9e01b738c7ed82db2cf51e10cd2710c42dc1648e24be4ec5729097a61093712665a9

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

Filesize
342KB

MD5
1a390ce9a38656bacbab2c736b376086

SHA1
8ed6c5c558ccef8562e9b414efc258933e60ea6f

SHA256
c4301978bfe1f1e601b8a9ccc63f2fbc4590b74bb46d6a95ed26f72a12556daa

SHA512
a42b3754c2e1ebba6c2cbae61825243f93c3d1322c08c924003a53af10c9fbc9c0f9d07854dae9a1cffe2ea99986cdb0250c6c9989abbd65c8c6c7d7eaf44a8a

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

Filesize
36KB

MD5
562e0d01d6571fa2251a1e9f54c6cc69

SHA1
83677ad3bc630aa6327253c7b3deffbd4a8ce905

SHA256
c5b1d800c86d550c0b68c57c0d9911c1dd21df9e5e37e9e7bc032b5e66fdebe6

SHA512
166e132432eca24061f7e7d0c58c0b286e971ae2bc50f7c890b7707dd5dede19fcd83a5f79b6fd3f93dd691e07ad9bc1bd05fe82ccaade1610282188571585ea

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

Filesize
13KB

MD5
b4c72da9fd1a0dcb0698b7da97daa0cd

SHA1
b25a79e8ea4c723c58caab83aed6ea48de7ed759

SHA256
45d266269634ba2de70f179a26d7224111e677e66b38dff2802851b71ce4458f

SHA512
f5f184416c5381d275bc093c9275e9fdb35c58e2c401d188aef097950013de6e43269da5d4dd5e7baea34735bd7de664d15fe487b2292fd66926c9845b0cd066

Download Submit
memory/1092-43-0x0000000010000000-0x000000001000B000-memory.dmp

Filesize
44KB

Download
memory/1092-58-0x0000000000400000-0x00000000005FC000-memory.dmp

Filesize
2.0MB

Download
memory/1092-68-0x0000000000400000-0x00000000005FC000-memory.dmp

Filesize
2.0MB

Download
memory/1092-23-0x0000000010000000-0x000000001000B000-memory.dmp

Filesize
44KB

Download
memory/1092-66-0x0000000000400000-0x00000000005FC000-memory.dmp

Filesize
2.0MB

Download
memory/1092-64-0x0000000000400000-0x00000000005FC000-memory.dmp

Filesize
2.0MB

Download
memory/1092-62-0x0000000000400000-0x00000000005FC000-memory.dmp

Filesize
2.0MB

Download
memory/1092-60-0x0000000000400000-0x00000000005FC000-memory.dmp

Filesize
2.0MB

Download
memory/1092-40-0x0000000000400000-0x00000000005FC000-memory.dmp

Filesize
2.0MB

Download
memory/1092-41-0x0000000002570000-0x0000000002571000-memory.dmp

Filesize
4KB

Download
memory/1092-19-0x0000000002570000-0x0000000002571000-memory.dmp

Filesize
4KB

Download
memory/1092-42-0x0000000000400000-0x00000000005FC000-memory.dmp

Filesize
2.0MB

Download
memory/1092-44-0x0000000000400000-0x00000000005FC000-memory.dmp

Filesize
2.0MB

Download
memory/1092-46-0x0000000000400000-0x00000000005FC000-memory.dmp

Filesize
2.0MB

Download
memory/1092-48-0x0000000000400000-0x00000000005FC000-memory.dmp

Filesize
2.0MB

Download
memory/1092-50-0x0000000000400000-0x00000000005FC000-memory.dmp

Filesize
2.0MB

Download
memory/1092-52-0x0000000000400000-0x00000000005FC000-memory.dmp

Filesize
2.0MB

Download
memory/1092-54-0x0000000000400000-0x00000000005FC000-memory.dmp

Filesize
2.0MB

Download
memory/1092-56-0x0000000000400000-0x00000000005FC000-memory.dmp

Filesize
2.0MB

Download
memory/1432-0-0x0000000000400000-0x00000000005FC000-memory.dmp

Filesize
2.0MB

Download
memory/1432-1-0x0000000000C10000-0x0000000000C11000-memory.dmp

Filesize
4KB

Download
memory/1432-38-0x0000000000400000-0x00000000005FC000-memory.dmp

Filesize
2.0MB

Download
memory/2788-33-0x0000000000400000-0x00000000005FC000-memory.dmp

Filesize
2.0MB

Download
memory/2788-9-0x0000000000400000-0x00000000005FC000-memory.dmp

Filesize
2.0MB

Download
memory/2788-10-0x00000000009D0000-0x00000000009D1000-memory.dmp

Filesize
4KB

Download