40839940c41d7f6817a2c485319521e22cf54c0fc9afe2de3bf1afa8201d5107

Analysis

max time kernel
156s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
20/10/2022, 00:57

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General

Target

40839940c41d7f6817a2c485319521e22cf54c0fc9afe2de3bf1afa8201d5107.exe
Size

342KB
MD5

a1a6a6e1b62b99365d8ea4db957692b6
SHA1

2bc8a873270bea2e1a6063689aeec1a2fac6d13b
SHA256

40839940c41d7f6817a2c485319521e22cf54c0fc9afe2de3bf1afa8201d5107
SHA512

ebd0e9e1aa811bdff48b8ded618003f674cac09af02917520d9a276193296395fdbf1303c63771705efc3e28771bce6394c701062b07fd25530ee6686260cc59
SSDEEP

6144:cRqmpp+amNOGokzLyM9tsLAitQo6tzOKkzIt8gKyfjxfR9D2j4yNR:4qmpplpGoGL3etQoMiXM8gxf/Sj4yNR

Score

10^/10

aspackv2 persistence upx

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1004

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"	40839940c41d7f6817a2c485319521e22cf54c0fc9afe2de3bf1afa8201d5107.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe C:\\Windows\\system32\\fservice.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/0x0006000000022e5f-142.dat	aspack_v212_v242

Adds policy Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
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
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	40839940c41d7f6817a2c485319521e22cf54c0fc9afe2de3bf1afa8201d5107.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\DirectX For Microsoft® Windows = "C:\\Windows\\system32\\fservice.exe"	40839940c41d7f6817a2c485319521e22cf54c0fc9afe2de3bf1afa8201d5107.exe

Executes dropped EXE 2 IoCs

pid	Process
3388	fservice.exe
2500	services.exe

Modifies Installed Components in the registry 2 TTPs 5 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

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"	40839940c41d7f6817a2c485319521e22cf54c0fc9afe2de3bf1afa8201d5107.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
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5Y99AE78-58TT-11dW-BE53-Y67078979Y}	40839940c41d7f6817a2c485319521e22cf54c0fc9afe2de3bf1afa8201d5107.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5Y99AE78-58TT-11dW-BE53-Y67078979Y}\	40839940c41d7f6817a2c485319521e22cf54c0fc9afe2de3bf1afa8201d5107.exe

UPX packed file 11 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000a000000022e2a-133.dat	upx
behavioral2/files/0x000a000000022e2a-134.dat	upx
behavioral2/files/0x0009000000022e30-135.dat	upx
behavioral2/files/0x000a000000022e4f-137.dat	upx
behavioral2/files/0x000a000000022e4f-138.dat	upx
behavioral2/memory/4116-139-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/3388-140-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/2500-141-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/3388-153-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/4116-155-0x0000000000400000-0x00000000005FC000-memory.dmp	upx
behavioral2/memory/2500-158-0x0000000000400000-0x00000000005FC000-memory.dmp	upx

Loads dropped DLL 5 IoCs

pid	Process
2500	services.exe
2500	services.exe
2500	services.exe
3388	fservice.exe
4116	40839940c41d7f6817a2c485319521e22cf54c0fc9afe2de3bf1afa8201d5107.exe

Unexpected DNS network traffic destination 5 IoCs

Network traffic to other servers than the configured DNS servers was detected on the DNS port.

description	ioc
Destination IP	95.0.242.21
Destination IP	151.164.23.201
Destination IP	155.223.2.2
Destination IP	184.56.183.72
Destination IP	193.255.49.56

Modifies WinLogon 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\	40839940c41d7f6817a2c485319521e22cf54c0fc9afe2de3bf1afa8201d5107.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 opened for modification	C:\Windows\SysWOW64\fservice.exe	40839940c41d7f6817a2c485319521e22cf54c0fc9afe2de3bf1afa8201d5107.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	40839940c41d7f6817a2c485319521e22cf54c0fc9afe2de3bf1afa8201d5107.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	40839940c41d7f6817a2c485319521e22cf54c0fc9afe2de3bf1afa8201d5107.exe
File opened for modification	C:\Windows\system\sservice.exe	40839940c41d7f6817a2c485319521e22cf54c0fc9afe2de3bf1afa8201d5107.exe
File created	C:\Windows\services.exe	fservice.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe
2500	services.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2500	services.exe
2500	services.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 4116 wrote to memory of 3388	4116	40839940c41d7f6817a2c485319521e22cf54c0fc9afe2de3bf1afa8201d5107.exe	82
PID 4116 wrote to memory of 3388	4116	40839940c41d7f6817a2c485319521e22cf54c0fc9afe2de3bf1afa8201d5107.exe	82
PID 4116 wrote to memory of 3388	4116	40839940c41d7f6817a2c485319521e22cf54c0fc9afe2de3bf1afa8201d5107.exe	82
PID 3388 wrote to memory of 2500	3388	fservice.exe	83
PID 3388 wrote to memory of 2500	3388	fservice.exe	83
PID 3388 wrote to memory of 2500	3388	fservice.exe	83
PID 2500 wrote to memory of 3776	2500	services.exe	87
PID 2500 wrote to memory of 3776	2500	services.exe	87
PID 2500 wrote to memory of 3776	2500	services.exe	87
PID 2500 wrote to memory of 4824	2500	services.exe	84
PID 2500 wrote to memory of 4824	2500	services.exe	84
PID 2500 wrote to memory of 4824	2500	services.exe	84
PID 3776 wrote to memory of 4260	3776	NET.exe	89
PID 3776 wrote to memory of 4260	3776	NET.exe	89
PID 3776 wrote to memory of 4260	3776	NET.exe	89
PID 4824 wrote to memory of 4644	4824	NET.exe	88
PID 4824 wrote to memory of 4644	4824	NET.exe	88
PID 4824 wrote to memory of 4644	4824	NET.exe	88
PID 4116 wrote to memory of 5032	4116	40839940c41d7f6817a2c485319521e22cf54c0fc9afe2de3bf1afa8201d5107.exe	90
PID 4116 wrote to memory of 5032	4116	40839940c41d7f6817a2c485319521e22cf54c0fc9afe2de3bf1afa8201d5107.exe	90
PID 4116 wrote to memory of 5032	4116	40839940c41d7f6817a2c485319521e22cf54c0fc9afe2de3bf1afa8201d5107.exe	90

C:\Users\Admin\AppData\Local\Temp\40839940c41d7f6817a2c485319521e22cf54c0fc9afe2de3bf1afa8201d5107.exe
"C:\Users\Admin\AppData\Local\Temp\40839940c41d7f6817a2c485319521e22cf54c0fc9afe2de3bf1afa8201d5107.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:4116
- 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:3388
- - C:\Windows\services.exe
    C:\Windows\services.exe -XP
    3⤵
    - Modifies WinLogon for persistence
    - Adds policy Run key to start application
    - Executes dropped EXE
    - Modifies Installed Components in the registry
    - 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:2500
  - - C:\Windows\SysWOW64\NET.exe
      NET STOP navapsvc
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4824
    - - C:\Windows\SysWOW64\net1.exe
        
        C:\Windows\system32\net1 STOP navapsvc
        5⤵
        
        PID:4644
  - - C:\Windows\SysWOW64\NET.exe
      NET STOP srservice
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3776
    - - C:\Windows\SysWOW64\net1.exe
        
        C:\Windows\system32\net1 STOP srservice
        5⤵
        
        PID:4260
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\40839940c41d7f6817a2c485319521e22cf54c0fc9afe2de3bf1afa8201d5107.exe.bat
  2⤵
  PID:5032

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\40839940c41d7f6817a2c485319521e22cf54c0fc9afe2de3bf1afa8201d5107.exe.bat

Filesize
133B

MD5
1fb0f8f0285c6493a821e6d220cd8455

SHA1
b7e2126a6bf47063ef0f44ef58790f500fd4263d

SHA256
733050babbdb88a99ce09c8d77a16456a54254ddfebd25f887efd7f48f8111cf

SHA512
b47ad9f44721a59b6c44995293303639806e702b0ad30a9974ff1c34d3050f0b971027d206087721a79fddb99698174298811bf75a735323a285bed94320a6e7

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

Filesize
342KB

MD5
a1a6a6e1b62b99365d8ea4db957692b6

SHA1
2bc8a873270bea2e1a6063689aeec1a2fac6d13b

SHA256
40839940c41d7f6817a2c485319521e22cf54c0fc9afe2de3bf1afa8201d5107

SHA512
ebd0e9e1aa811bdff48b8ded618003f674cac09af02917520d9a276193296395fdbf1303c63771705efc3e28771bce6394c701062b07fd25530ee6686260cc59

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

Filesize
342KB

MD5
a1a6a6e1b62b99365d8ea4db957692b6

SHA1
2bc8a873270bea2e1a6063689aeec1a2fac6d13b

SHA256
40839940c41d7f6817a2c485319521e22cf54c0fc9afe2de3bf1afa8201d5107

SHA512
ebd0e9e1aa811bdff48b8ded618003f674cac09af02917520d9a276193296395fdbf1303c63771705efc3e28771bce6394c701062b07fd25530ee6686260cc59

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

Filesize
36KB

MD5
562e0d01d6571fa2251a1e9f54c6cc69

SHA1
83677ad3bc630aa6327253c7b3deffbd4a8ce905

SHA256
c5b1d800c86d550c0b68c57c0d9911c1dd21df9e5e37e9e7bc032b5e66fdebe6

SHA512
166e132432eca24061f7e7d0c58c0b286e971ae2bc50f7c890b7707dd5dede19fcd83a5f79b6fd3f93dd691e07ad9bc1bd05fe82ccaade1610282188571585ea

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

Filesize
36KB

MD5
562e0d01d6571fa2251a1e9f54c6cc69

SHA1
83677ad3bc630aa6327253c7b3deffbd4a8ce905

SHA256
c5b1d800c86d550c0b68c57c0d9911c1dd21df9e5e37e9e7bc032b5e66fdebe6

SHA512
166e132432eca24061f7e7d0c58c0b286e971ae2bc50f7c890b7707dd5dede19fcd83a5f79b6fd3f93dd691e07ad9bc1bd05fe82ccaade1610282188571585ea

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

Filesize
36KB

MD5
562e0d01d6571fa2251a1e9f54c6cc69

SHA1
83677ad3bc630aa6327253c7b3deffbd4a8ce905

SHA256
c5b1d800c86d550c0b68c57c0d9911c1dd21df9e5e37e9e7bc032b5e66fdebe6

SHA512
166e132432eca24061f7e7d0c58c0b286e971ae2bc50f7c890b7707dd5dede19fcd83a5f79b6fd3f93dd691e07ad9bc1bd05fe82ccaade1610282188571585ea

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

Filesize
36KB

MD5
562e0d01d6571fa2251a1e9f54c6cc69

SHA1
83677ad3bc630aa6327253c7b3deffbd4a8ce905

SHA256
c5b1d800c86d550c0b68c57c0d9911c1dd21df9e5e37e9e7bc032b5e66fdebe6

SHA512
166e132432eca24061f7e7d0c58c0b286e971ae2bc50f7c890b7707dd5dede19fcd83a5f79b6fd3f93dd691e07ad9bc1bd05fe82ccaade1610282188571585ea

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
C:\Windows\services.exe

Filesize
342KB

MD5
a1a6a6e1b62b99365d8ea4db957692b6

SHA1
2bc8a873270bea2e1a6063689aeec1a2fac6d13b

SHA256
40839940c41d7f6817a2c485319521e22cf54c0fc9afe2de3bf1afa8201d5107

SHA512
ebd0e9e1aa811bdff48b8ded618003f674cac09af02917520d9a276193296395fdbf1303c63771705efc3e28771bce6394c701062b07fd25530ee6686260cc59

Download Submit
C:\Windows\services.exe

Filesize
342KB

MD5
a1a6a6e1b62b99365d8ea4db957692b6

SHA1
2bc8a873270bea2e1a6063689aeec1a2fac6d13b

SHA256
40839940c41d7f6817a2c485319521e22cf54c0fc9afe2de3bf1afa8201d5107

SHA512
ebd0e9e1aa811bdff48b8ded618003f674cac09af02917520d9a276193296395fdbf1303c63771705efc3e28771bce6394c701062b07fd25530ee6686260cc59

Download Submit
C:\Windows\system\sservice.exe

Filesize
342KB

MD5
a1a6a6e1b62b99365d8ea4db957692b6

SHA1
2bc8a873270bea2e1a6063689aeec1a2fac6d13b

SHA256
40839940c41d7f6817a2c485319521e22cf54c0fc9afe2de3bf1afa8201d5107

SHA512
ebd0e9e1aa811bdff48b8ded618003f674cac09af02917520d9a276193296395fdbf1303c63771705efc3e28771bce6394c701062b07fd25530ee6686260cc59

Download Submit
memory/2500-157-0x0000000010000000-0x000000001000B000-memory.dmp

Filesize
44KB

Download
memory/2500-158-0x0000000000400000-0x00000000005FC000-memory.dmp

Filesize
2.0MB

Download
memory/2500-147-0x0000000002D91000-0x0000000002D95000-memory.dmp

Filesize
16KB

Download
memory/2500-141-0x0000000000400000-0x00000000005FC000-memory.dmp

Filesize
2.0MB

Download
memory/3388-140-0x0000000000400000-0x00000000005FC000-memory.dmp

Filesize
2.0MB

Download
memory/3388-153-0x0000000000400000-0x00000000005FC000-memory.dmp

Filesize
2.0MB

Download
memory/4116-139-0x0000000000400000-0x00000000005FC000-memory.dmp

Filesize
2.0MB

Download
memory/4116-155-0x0000000000400000-0x00000000005FC000-memory.dmp

Filesize
2.0MB

Download