8efdd75cbe81fcbeb47acf6082db087b668808f721aeaacc89d2b79efa4da971

Analysis

max time kernel
151s
max time network
135s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
30/12/2023, 01:39

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General

Target

0a5bc0c4edebf59f51c43532a8695f7f.exe
Size

1.9MB
MD5

0a5bc0c4edebf59f51c43532a8695f7f
SHA1

346ccb61505d0c554997c5b767706a28393bbe69
SHA256

8efdd75cbe81fcbeb47acf6082db087b668808f721aeaacc89d2b79efa4da971
SHA512

9b18adf3d1d7f3100e153033f99728050f2188243d8aaf88f60abd9ed7ef02156d0267a9d5c1cdac7d45e6e3e2e3ea1a37b9054e2fb9f48f72f0bab096f4a9ba
SSDEEP

12288:RFfwcHcu8pMkZ3Fn9d+Vd3SUZ+7EeI1x7f7V3+hT6DaRWz58kc+1xy8SyGR4Z:RJcu8pl9d+VdCUhN1SsNK+1pSyA4Z

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"	0a5bc0c4edebf59f51c43532a8695f7f.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	0a5bc0c4edebf59f51c43532a8695f7f.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\DirectX For Microsoft® Windows = "C:\\Windows\\system32\\fservice.exe"	0a5bc0c4edebf59f51c43532a8695f7f.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}	0a5bc0c4edebf59f51c43532a8695f7f.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{5Y99AE78-58TT-11dW-BE53-Y67078979Y}\	0a5bc0c4edebf59f51c43532a8695f7f.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{5Y99AE78-58TT-11dW-BE53-Y67078979Y}\StubPath = "C:\\Windows\\system\\sservice.exe"	0a5bc0c4edebf59f51c43532a8695f7f.exe

ASPack v2.12-2.42 1 IoCs

Detects executables packed with ASPack v2.12-2.42

aspackv2

resource	yara_rule
behavioral1/files/0x0007000000015c80-24.dat	aspack_v212_v242

Executes dropped EXE 2 IoCs

pid	Process
2608	fservice.exe
2740	services.exe

Loads dropped DLL 4 IoCs

pid	Process
2228	0a5bc0c4edebf59f51c43532a8695f7f.exe
2228	0a5bc0c4edebf59f51c43532a8695f7f.exe
2740	services.exe
2740	services.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\	0a5bc0c4edebf59f51c43532a8695f7f.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	0a5bc0c4edebf59f51c43532a8695f7f.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	0a5bc0c4edebf59f51c43532a8695f7f.exe

Drops file in Windows directory 8 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system\sservice.exe	fservice.exe
File created	C:\Windows\system\sservice.exe	services.exe
File opened for modification	C:\Windows\system\sservice.exe	services.exe
File created	C:\Windows\system\sservice.exe	0a5bc0c4edebf59f51c43532a8695f7f.exe
File opened for modification	C:\Windows\system\sservice.exe	0a5bc0c4edebf59f51c43532a8695f7f.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

Runs net.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe
2740	services.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2740	services.exe
2740	services.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2228 wrote to memory of 2608	2228	0a5bc0c4edebf59f51c43532a8695f7f.exe	28
PID 2228 wrote to memory of 2608	2228	0a5bc0c4edebf59f51c43532a8695f7f.exe	28
PID 2228 wrote to memory of 2608	2228	0a5bc0c4edebf59f51c43532a8695f7f.exe	28
PID 2228 wrote to memory of 2608	2228	0a5bc0c4edebf59f51c43532a8695f7f.exe	28
PID 2608 wrote to memory of 2740	2608	fservice.exe	29
PID 2608 wrote to memory of 2740	2608	fservice.exe	29
PID 2608 wrote to memory of 2740	2608	fservice.exe	29
PID 2608 wrote to memory of 2740	2608	fservice.exe	29
PID 2740 wrote to memory of 2492	2740	services.exe	31
PID 2740 wrote to memory of 2492	2740	services.exe	31
PID 2740 wrote to memory of 2492	2740	services.exe	31
PID 2740 wrote to memory of 2492	2740	services.exe	31
PID 2740 wrote to memory of 2808	2740	services.exe	32
PID 2740 wrote to memory of 2808	2740	services.exe	32
PID 2740 wrote to memory of 2808	2740	services.exe	32
PID 2740 wrote to memory of 2808	2740	services.exe	32
PID 2492 wrote to memory of 2900	2492	NET.exe	36
PID 2492 wrote to memory of 2900	2492	NET.exe	36
PID 2492 wrote to memory of 2900	2492	NET.exe	36
PID 2492 wrote to memory of 2900	2492	NET.exe	36
PID 2808 wrote to memory of 1564	2808	NET.exe	37
PID 2808 wrote to memory of 1564	2808	NET.exe	37
PID 2808 wrote to memory of 1564	2808	NET.exe	37
PID 2808 wrote to memory of 1564	2808	NET.exe	37

C:\Users\Admin\AppData\Local\Temp\0a5bc0c4edebf59f51c43532a8695f7f.exe
"C:\Users\Admin\AppData\Local\Temp\0a5bc0c4edebf59f51c43532a8695f7f.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:2228
- C:\Windows\SysWOW64\fservice.exe
  C:\Windows\system32\fservice.exe
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:2608
- - 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:2740
  - - C:\Windows\SysWOW64\NET.exe
      NET STOP srservice
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2492
    - - C:\Windows\SysWOW64\net1.exe
        
        C:\Windows\system32\net1 STOP srservice
        5⤵
        
        PID:2900
  - - C:\Windows\SysWOW64\NET.exe
      NET STOP navapsvc
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2808
    - - C:\Windows\SysWOW64\net1.exe
        
        C:\Windows\system32\net1 STOP navapsvc
        5⤵
        
        PID:1564

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

\Windows\SysWOW64\fservice.exe

Filesize
1.9MB

MD5
0a5bc0c4edebf59f51c43532a8695f7f

SHA1
346ccb61505d0c554997c5b767706a28393bbe69

SHA256
8efdd75cbe81fcbeb47acf6082db087b668808f721aeaacc89d2b79efa4da971

SHA512
9b18adf3d1d7f3100e153033f99728050f2188243d8aaf88f60abd9ed7ef02156d0267a9d5c1cdac7d45e6e3e2e3ea1a37b9054e2fb9f48f72f0bab096f4a9ba

Download Submit
\Windows\SysWOW64\reginv.dll

Filesize
36KB

MD5
562e0d01d6571fa2251a1e9f54c6cc69

SHA1
83677ad3bc630aa6327253c7b3deffbd4a8ce905

SHA256
c5b1d800c86d550c0b68c57c0d9911c1dd21df9e5e37e9e7bc032b5e66fdebe6

SHA512
166e132432eca24061f7e7d0c58c0b286e971ae2bc50f7c890b7707dd5dede19fcd83a5f79b6fd3f93dd691e07ad9bc1bd05fe82ccaade1610282188571585ea

Download Submit
\Windows\SysWOW64\winkey.dll

Filesize
13KB

MD5
b4c72da9fd1a0dcb0698b7da97daa0cd

SHA1
b25a79e8ea4c723c58caab83aed6ea48de7ed759

SHA256
45d266269634ba2de70f179a26d7224111e677e66b38dff2802851b71ce4458f

SHA512
f5f184416c5381d275bc093c9275e9fdb35c58e2c401d188aef097950013de6e43269da5d4dd5e7baea34735bd7de664d15fe487b2292fd66926c9845b0cd066

Download Submit
memory/2228-36-0x0000000000400000-0x00000000005F8000-memory.dmp

Filesize
2.0MB

Download
memory/2228-31-0x00000000002C0000-0x00000000002C1000-memory.dmp

Filesize
4KB

Download
memory/2228-27-0x0000000000400000-0x00000000005F8000-memory.dmp

Filesize
2.0MB

Download
memory/2228-0-0x00000000002C0000-0x00000000002C1000-memory.dmp

Filesize
4KB

Download
memory/2608-12-0x00000000003C0000-0x00000000003C1000-memory.dmp

Filesize
4KB

Download
memory/2608-28-0x0000000000400000-0x00000000005F8000-memory.dmp

Filesize
2.0MB

Download
memory/2608-37-0x0000000000400000-0x00000000005F8000-memory.dmp

Filesize
2.0MB

Download
memory/2740-29-0x0000000000400000-0x00000000005F8000-memory.dmp

Filesize
2.0MB

Download
memory/2740-51-0x0000000000400000-0x00000000005F8000-memory.dmp

Filesize
2.0MB

Download
memory/2740-23-0x0000000000250000-0x0000000000251000-memory.dmp

Filesize
4KB

Download
memory/2740-30-0x0000000010000000-0x000000001000B000-memory.dmp

Filesize
44KB

Download
memory/2740-26-0x0000000010000000-0x000000001000B000-memory.dmp

Filesize
44KB

Download
memory/2740-47-0x0000000000400000-0x00000000005F8000-memory.dmp

Filesize
2.0MB

Download
memory/2740-49-0x0000000000400000-0x00000000005F8000-memory.dmp

Filesize
2.0MB

Download
memory/2740-34-0x0000000000400000-0x00000000005F8000-memory.dmp

Filesize
2.0MB

Download
memory/2740-53-0x0000000000400000-0x00000000005F8000-memory.dmp

Filesize
2.0MB

Download
memory/2740-55-0x0000000000400000-0x00000000005F8000-memory.dmp

Filesize
2.0MB

Download
memory/2740-57-0x0000000000400000-0x00000000005F8000-memory.dmp

Filesize
2.0MB

Download
memory/2740-59-0x0000000000400000-0x00000000005F8000-memory.dmp

Filesize
2.0MB

Download
memory/2740-61-0x0000000000400000-0x00000000005F8000-memory.dmp

Filesize
2.0MB

Download
memory/2740-63-0x0000000000400000-0x00000000005F8000-memory.dmp

Filesize
2.0MB

Download
memory/2740-65-0x0000000000400000-0x00000000005F8000-memory.dmp

Filesize
2.0MB

Download
memory/2740-67-0x0000000000400000-0x00000000005F8000-memory.dmp

Filesize
2.0MB

Download