8bd40eca571300794316c8988c558e73738f91805ed8f3ed6c0803a1d0c80319

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
15/03/2024, 12:48

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General

Target
cb730bb370dbb207ce3277a4db08da4c.exe
Size 1.9MB
Sample240315-p1v21aaf97
SHA256 8bd40eca571300794316c8988c558e73738f91805ed8f3ed6c0803a1d0c80319
MD5 cb730bb370dbb207ce3277a4db08da4c
SHA1 7cc41251ed8d3fb2676199b32b278266e795db8f
SHA512 cdb6b5790e4c1fbaf95ea1e24a3a171e988b0c4bcdf62f42776f9705aa95155127255954d16ea29e2f46f4952df65c5b07dcb466ea91c75a349035d84f702df2
SSDEEP 12288:RFfwcHcu8pMkZ3Fn9d+Vd3SUZ+7EeI1x7f7V3+hT6DaRWz58kc+1xy8SyG84h:RJcu8pl9d+VdCUhN1SsNK+1pSy94h
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

aspackv2 persistence

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"	cb730bb370dbb207ce3277a4db08da4c.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe C:\\Windows\\system32\\fservice.exe"	services.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	cb730bb370dbb207ce3277a4db08da4c.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\DirectX For Microsoft® Windows = "C:\\Windows\\system32\\fservice.exe"	cb730bb370dbb207ce3277a4db08da4c.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

Modifies Installed Components in the registry 2 TTPs 5 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

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}	cb730bb370dbb207ce3277a4db08da4c.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5Y99AE78-58TT-11dW-BE53-Y67078979Y}\	cb730bb370dbb207ce3277a4db08da4c.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5Y99AE78-58TT-11dW-BE53-Y67078979Y}\StubPath = "C:\\Windows\\system\\sservice.exe"	cb730bb370dbb207ce3277a4db08da4c.exe

ASPack v2.12-2.42 1 IoCs

Detects executables packed with ASPack v2.12-2.42

aspackv2

resource	yara_rule
behavioral2/files/0x00070000000231e2-19.dat	aspack_v212_v242

Executes dropped EXE 2 IoCs

pid	Process
1492	fservice.exe
2968	services.exe

Loads dropped DLL 5 IoCs

pid	Process
2968	services.exe
2968	services.exe
2968	services.exe
1492	fservice.exe
5236	cb730bb370dbb207ce3277a4db08da4c.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\	cb730bb370dbb207ce3277a4db08da4c.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	cb730bb370dbb207ce3277a4db08da4c.exe
File opened for modification	C:\Windows\SysWOW64\fservice.exe	cb730bb370dbb207ce3277a4db08da4c.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

Drops file in Windows directory 7 IoCs

description	ioc	Process
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
File created	C:\Windows\system\sservice.exe	cb730bb370dbb207ce3277a4db08da4c.exe
File opened for modification	C:\Windows\system\sservice.exe	cb730bb370dbb207ce3277a4db08da4c.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe
2968	services.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2968	services.exe
2968	services.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 5236 wrote to memory of 1492	5236	cb730bb370dbb207ce3277a4db08da4c.exe	89
PID 5236 wrote to memory of 1492	5236	cb730bb370dbb207ce3277a4db08da4c.exe	89
PID 5236 wrote to memory of 1492	5236	cb730bb370dbb207ce3277a4db08da4c.exe	89
PID 1492 wrote to memory of 2968	1492	fservice.exe	90
PID 1492 wrote to memory of 2968	1492	fservice.exe	90
PID 1492 wrote to memory of 2968	1492	fservice.exe	90
PID 2968 wrote to memory of 5716	2968	services.exe	91
PID 2968 wrote to memory of 5716	2968	services.exe	91
PID 2968 wrote to memory of 5716	2968	services.exe	91
PID 2968 wrote to memory of 208	2968	services.exe	92
PID 2968 wrote to memory of 208	2968	services.exe	92
PID 2968 wrote to memory of 208	2968	services.exe	92
PID 208 wrote to memory of 6012	208	NET.exe	95
PID 208 wrote to memory of 6012	208	NET.exe	95
PID 208 wrote to memory of 6012	208	NET.exe	95
PID 5236 wrote to memory of 4840	5236	cb730bb370dbb207ce3277a4db08da4c.exe	96
PID 5236 wrote to memory of 4840	5236	cb730bb370dbb207ce3277a4db08da4c.exe	96
PID 5236 wrote to memory of 4840	5236	cb730bb370dbb207ce3277a4db08da4c.exe	96
PID 5716 wrote to memory of 452	5716	NET.exe	98
PID 5716 wrote to memory of 452	5716	NET.exe	98
PID 5716 wrote to memory of 452	5716	NET.exe	98

C:\Users\Admin\AppData\Local\Temp\cb730bb370dbb207ce3277a4db08da4c.exe
"C:\Users\Admin\AppData\Local\Temp\cb730bb370dbb207ce3277a4db08da4c.exe"
1⤵
- Modifies WinLogon for persistence
- Adds policy Run key to start application
- Modifies Installed Components in the registry
- Loads dropped DLL
- Modifies WinLogon
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:5236
- 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
  - Suspicious use of WriteProcessMemory
  PID:1492
- - C:\Windows\services.exe
    C:\Windows\services.exe -XP
    3⤵
    - Modifies WinLogon for persistence
    - Adds policy Run key to start application
    - Modifies Installed Components in the registry
    - Executes dropped EXE
    - Loads dropped DLL
    - Modifies WinLogon
    - Drops file in System32 directory
    - Drops file in Windows directory
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2968
  - - C:\Windows\SysWOW64\NET.exe
      NET STOP srservice
      4⤵
      Suspicious use of WriteProcessMemory
      PID:5716
    - - C:\Windows\SysWOW64\net1.exe
        
        C:\Windows\system32\net1 STOP srservice
        5⤵
        
        PID:452
  - - C:\Windows\SysWOW64\NET.exe
      NET STOP navapsvc
      4⤵
      Suspicious use of WriteProcessMemory
      PID:208
    - - C:\Windows\SysWOW64\net1.exe
        
        C:\Windows\system32\net1 STOP navapsvc
        5⤵
        
        PID:6012
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\cb730bb370dbb207ce3277a4db08da4c.exe.bat
  2⤵
  PID:4840

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

cb730bb370dbb207ce3277a4db08da4c.exe.bat

Path C:\Users\Admin\AppData\Local\Temp\cb730bb370dbb207ce3277a4db08da4c.exe.bat
Size 133B
SHA256 bd3bb6cc77cba7704ab047c275e33bd65841bfeb7278f21ae4914fa044819750
MD5 b25f7550cc3f92fe693dabc0c44b94d1
SHA1 3eaca9f73ab163e9f711fa5f5bb426e7f08e3cf5
SHA512 03d0fec1af83b39f4ef67ea8772f983dce6196f78b8b595567e72f847d4ed6ccb4d5272c7fa44591919a500e754f0dde99590fb13f30700cb086b8cd8d4639f2
MD5 SHA1 SHA512

Submit Download

fservice.exe

Path C:\Windows\SysWOW64\fservice.exe
Size 1.9MB
SHA256 8bd40eca571300794316c8988c558e73738f91805ed8f3ed6c0803a1d0c80319
MD5 cb730bb370dbb207ce3277a4db08da4c
SHA1 7cc41251ed8d3fb2676199b32b278266e795db8f
SHA512 cdb6b5790e4c1fbaf95ea1e24a3a171e988b0c4bcdf62f42776f9705aa95155127255954d16ea29e2f46f4952df65c5b07dcb466ea91c75a349035d84f702df2
SSDEEP 12288:RFfwcHcu8pMkZ3Fn9d+Vd3SUZ+7EeI1x7f7V3+hT6DaRWz58kc+1xy8SyG84h:RJcu8pl9d+VdCUhN1SsNK+1pSy94h
MD5 SHA1 SHA512 SSDEEP

Submit Download

reginv.dll

Path C:\Windows\SysWOW64\reginv.dll
Size 36KB
SHA256 c5b1d800c86d550c0b68c57c0d9911c1dd21df9e5e37e9e7bc032b5e66fdebe6
MD5 562e0d01d6571fa2251a1e9f54c6cc69
SHA1 83677ad3bc630aa6327253c7b3deffbd4a8ce905
SHA512 166e132432eca24061f7e7d0c58c0b286e971ae2bc50f7c890b7707dd5dede19fcd83a5f79b6fd3f93dd691e07ad9bc1bd05fe82ccaade1610282188571585ea
SSDEEP 384:nqqS78pWkPT5NGqu1mlWVtCj7y6bWHAtgNoUo3GFa:nqNmvT5JOCj7lWHAeiUo
MD5 SHA1 SHA512 SSDEEP

Submit Download

winkey.dll

Path C:\Windows\SysWOW64\winkey.dll
Size 13KB
SHA256 45d266269634ba2de70f179a26d7224111e677e66b38dff2802851b71ce4458f
MD5 b4c72da9fd1a0dcb0698b7da97daa0cd
SHA1 b25a79e8ea4c723c58caab83aed6ea48de7ed759
SHA512 f5f184416c5381d275bc093c9275e9fdb35c58e2c401d188aef097950013de6e43269da5d4dd5e7baea34735bd7de664d15fe487b2292fd66926c9845b0cd066
SSDEEP 384:NlYOgpRBTLCIlt5dtahAxvr6+S9Pfu7n5:NlZEXL3t5dtnx+deV
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1492-8-0x0000000002270000-0x0000000002271000-memory.dmp

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memory/1492-31-0x0000000000400000-0x00000000005F8000-memory.dmp

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memory/2968-41-0x0000000002760000-0x0000000002761000-memory.dmp

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memory/2968-46-0x0000000000400000-0x00000000005F8000-memory.dmp

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memory/2968-64-0x0000000000400000-0x00000000005F8000-memory.dmp

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memory/2968-17-0x0000000002760000-0x0000000002761000-memory.dmp

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memory/2968-37-0x0000000000400000-0x00000000005F8000-memory.dmp

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memory/2968-39-0x0000000000400000-0x00000000005F8000-memory.dmp

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memory/2968-62-0x0000000000400000-0x00000000005F8000-memory.dmp

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memory/2968-42-0x0000000000400000-0x00000000005F8000-memory.dmp

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memory/2968-44-0x0000000000400000-0x00000000005F8000-memory.dmp

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memory/2968-22-0x0000000010000000-0x000000001000B000-memory.dmp

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memory/2968-48-0x0000000000400000-0x00000000005F8000-memory.dmp

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memory/2968-50-0x0000000000400000-0x00000000005F8000-memory.dmp

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memory/2968-52-0x0000000000400000-0x00000000005F8000-memory.dmp

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memory/2968-54-0x0000000000400000-0x00000000005F8000-memory.dmp

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memory/2968-56-0x0000000000400000-0x00000000005F8000-memory.dmp

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memory/2968-58-0x0000000000400000-0x00000000005F8000-memory.dmp

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memory/2968-60-0x0000000000400000-0x00000000005F8000-memory.dmp

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memory/5236-0-0x0000000000D90000-0x0000000000D91000-memory.dmp

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memory/5236-35-0x0000000000400000-0x00000000005F8000-memory.dmp

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