13b6780f730975cde9120eff7a4dc51604090acd180d1e27a05272849f4bdedf

Analysis

max time kernel
153s
max time network
147s
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, 15:10

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General

Target
cbbaee287079ad3f8444a9f7f966b09a.exe
Size 342KB
Sample240315-skd1bsdf53
SHA256 13b6780f730975cde9120eff7a4dc51604090acd180d1e27a05272849f4bdedf
MD5 cbbaee287079ad3f8444a9f7f966b09a
SHA1 2f8779a00d15a49c8f80d92374a51bda6a2cf688
SHA512 8f1039f981a4939aeb34bb826889e0d6ab8a12f1fdbc7347247adc0363469be724800badfe3bc309a51d535a1bbb0f41cc8874bb11ecf1dda6f4347e967a8772
SSDEEP 6144:lRqmpp+amNOGokzLyM9tsLAitQo6tzOKkzIt8gKyfjxfR9D2j4yBO:7qmpplpGoGL3etQoMiXM8gxf/Sj4yBO
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

aspackv2 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"	cbbaee287079ad3f8444a9f7f966b09a.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	cbbaee287079ad3f8444a9f7f966b09a.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\DirectX For Microsoft® Windows = "C:\\Windows\\system32\\fservice.exe"	cbbaee287079ad3f8444a9f7f966b09a.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}	cbbaee287079ad3f8444a9f7f966b09a.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5Y99AE78-58TT-11dW-BE53-Y67078979Y}\	cbbaee287079ad3f8444a9f7f966b09a.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5Y99AE78-58TT-11dW-BE53-Y67078979Y}\StubPath = "C:\\Windows\\system\\sservice.exe"	cbbaee287079ad3f8444a9f7f966b09a.exe
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

ASPack v2.12-2.42 1 IoCs

Detects executables packed with ASPack v2.12-2.42

aspackv2

resource	yara_rule
behavioral2/files/0x0003000000022ea1-22.dat	aspack_v212_v242

Executes dropped EXE 2 IoCs

pid	Process
1240	fservice.exe
2560	services.exe

Loads dropped DLL 5 IoCs

pid	Process
2560	services.exe
2560	services.exe
2560	services.exe
1240	fservice.exe
656	cbbaee287079ad3f8444a9f7f966b09a.exe

UPX packed file 21 IoCs

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

upx

resource	yara_rule
behavioral2/memory/656-0-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/files/0x0005000000022d26-6.dat	upx
behavioral2/memory/1240-9-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/2560-19-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/1240-34-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/656-38-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/2560-40-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/2560-42-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/2560-44-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/2560-46-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/2560-48-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/2560-50-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/2560-52-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/2560-54-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/2560-56-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/2560-58-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/2560-60-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/2560-62-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/2560-64-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/2560-66-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/2560-68-0x0000000000400000-0x00000000005FC000-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\	cbbaee287079ad3f8444a9f7f966b09a.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	cbbaee287079ad3f8444a9f7f966b09a.exe
File opened for modification	C:\Windows\SysWOW64\fservice.exe	cbbaee287079ad3f8444a9f7f966b09a.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 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	cbbaee287079ad3f8444a9f7f966b09a.exe
File opened for modification	C:\Windows\system\sservice.exe	cbbaee287079ad3f8444a9f7f966b09a.exe
File created	C:\Windows\services.exe	fservice.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe
2560	services.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2560	services.exe
2560	services.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 656 wrote to memory of 1240	656	cbbaee287079ad3f8444a9f7f966b09a.exe	98
PID 656 wrote to memory of 1240	656	cbbaee287079ad3f8444a9f7f966b09a.exe	98
PID 656 wrote to memory of 1240	656	cbbaee287079ad3f8444a9f7f966b09a.exe	98
PID 1240 wrote to memory of 2560	1240	fservice.exe	100
PID 1240 wrote to memory of 2560	1240	fservice.exe	100
PID 1240 wrote to memory of 2560	1240	fservice.exe	100
PID 2560 wrote to memory of 3672	2560	services.exe	101
PID 2560 wrote to memory of 3672	2560	services.exe	101
PID 2560 wrote to memory of 3672	2560	services.exe	101
PID 3672 wrote to memory of 3460	3672	NET.exe	103
PID 3672 wrote to memory of 3460	3672	NET.exe	103
PID 3672 wrote to memory of 3460	3672	NET.exe	103
PID 656 wrote to memory of 4104	656	cbbaee287079ad3f8444a9f7f966b09a.exe	105
PID 656 wrote to memory of 4104	656	cbbaee287079ad3f8444a9f7f966b09a.exe	105
PID 656 wrote to memory of 4104	656	cbbaee287079ad3f8444a9f7f966b09a.exe	105

C:\Users\Admin\AppData\Local\Temp\cbbaee287079ad3f8444a9f7f966b09a.exe
"C:\Users\Admin\AppData\Local\Temp\cbbaee287079ad3f8444a9f7f966b09a.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:656
- 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:1240
- - 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:2560
  - - C:\Windows\SysWOW64\NET.exe
      NET STOP navapsvc
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3672
    - - C:\Windows\SysWOW64\net1.exe
        
        C:\Windows\system32\net1 STOP navapsvc
        5⤵
        
        PID:3460
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\cbbaee287079ad3f8444a9f7f966b09a.exe.bat
  2⤵
  PID:4104

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1408 --field-trial-handle=2276,i,5697607538120380977,9987005253899555344,262144 --variations-seed-version /prefetch:8
1⤵
PID:1872

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

cbbaee287079ad3f8444a9f7f966b09a.exe.bat

Path C:\Users\Admin\AppData\Local\Temp\cbbaee287079ad3f8444a9f7f966b09a.exe.bat
Size 133B
SHA256 0705ce9137968b571a0fa05b9c40c00d4f3aea80cbb1ab31c899f2d894a01296
MD5 e77e15042dab5f7ea76e68f96d6bcafa
SHA1 b4a1256b2e5478ac5029d45ecead8fb5d387a53a
SHA512 ee5ed0c517ec82e1e05f32af826dd01bd0748ddfe7b629a03a6eb87f04b433bb9f401f7bd5e79710714991ad1718479076f9fadee603ccb5095afed24f5ba645
MD5 SHA1 SHA512

Submit Download

fservice.exe

Path C:\Windows\SysWOW64\fservice.exe
Size 342KB
SHA256 13b6780f730975cde9120eff7a4dc51604090acd180d1e27a05272849f4bdedf
MD5 cbbaee287079ad3f8444a9f7f966b09a
SHA1 2f8779a00d15a49c8f80d92374a51bda6a2cf688
SHA512 8f1039f981a4939aeb34bb826889e0d6ab8a12f1fdbc7347247adc0363469be724800badfe3bc309a51d535a1bbb0f41cc8874bb11ecf1dda6f4347e967a8772
SSDEEP 6144:lRqmpp+amNOGokzLyM9tsLAitQo6tzOKkzIt8gKyfjxfR9D2j4yBO:7qmpplpGoGL3etQoMiXM8gxf/Sj4yBO
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/656-1-0x00000000024C0000-0x00000000024C1000-memory.dmp

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memory/656-0-0x0000000000400000-0x00000000005FC000-memory.dmp

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memory/656-38-0x0000000000400000-0x00000000005FC000-memory.dmp

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memory/1240-34-0x0000000000400000-0x00000000005FC000-memory.dmp

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memory/1240-9-0x0000000000400000-0x00000000005FC000-memory.dmp

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memory/1240-10-0x0000000002480000-0x0000000002481000-memory.dmp

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memory/2560-41-0x0000000010000000-0x000000001000B000-memory.dmp

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memory/2560-48-0x0000000000400000-0x00000000005FC000-memory.dmp

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memory/2560-20-0x0000000002570000-0x0000000002571000-memory.dmp

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memory/2560-40-0x0000000000400000-0x00000000005FC000-memory.dmp

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memory/2560-19-0x0000000000400000-0x00000000005FC000-memory.dmp

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memory/2560-42-0x0000000000400000-0x00000000005FC000-memory.dmp

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memory/2560-45-0x0000000002570000-0x0000000002571000-memory.dmp

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memory/2560-44-0x0000000000400000-0x00000000005FC000-memory.dmp

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memory/2560-46-0x0000000000400000-0x00000000005FC000-memory.dmp

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memory/2560-24-0x0000000010000000-0x000000001000B000-memory.dmp

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memory/2560-50-0x0000000000400000-0x00000000005FC000-memory.dmp

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memory/2560-52-0x0000000000400000-0x00000000005FC000-memory.dmp

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memory/2560-54-0x0000000000400000-0x00000000005FC000-memory.dmp

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memory/2560-56-0x0000000000400000-0x00000000005FC000-memory.dmp

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memory/2560-58-0x0000000000400000-0x00000000005FC000-memory.dmp

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memory/2560-60-0x0000000000400000-0x00000000005FC000-memory.dmp

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memory/2560-62-0x0000000000400000-0x00000000005FC000-memory.dmp

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memory/2560-64-0x0000000000400000-0x00000000005FC000-memory.dmp

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memory/2560-66-0x0000000000400000-0x00000000005FC000-memory.dmp

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memory/2560-68-0x0000000000400000-0x00000000005FC000-memory.dmp

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