dc015037a687274736aa766539a17532971ac4e249c157460271c704f5adc364

Analysis

max time kernel
120s
max time network
120s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
12/09/2024, 03:03

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General

Target

a6a7d0449c2d8626b59d01dfa3899400N.exe
Size

69KB
MD5

a6a7d0449c2d8626b59d01dfa3899400
SHA1

e0f336832ec01deb62acc97a8a85af511cf69f37
SHA256

dc015037a687274736aa766539a17532971ac4e249c157460271c704f5adc364
SHA512

207cac72eef61e234c3f2d3349f50f250e6454ca4830a37355e01d1dcddbbb343c3f05e71bdb4503bf6982366368473fa33979f60db86b46dda874b8cfa4f4a2
SSDEEP

1536:EJrFDMRyriCY/qXfatMp4Q2V6fIMxIpL9:0F8dCY85TE6fIMSR9

Score

10^/10

discovery evasion 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 = "C:\\Windows\\explorer.exe, c:\\windows\\system\\explorer.exe"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "C:\\Windows\\explorer.exe, c:\\windows\\system\\explorer.exe"	svchost.exe

Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.exe

Boot or Logon Autostart Execution: Active Setup 2 TTPs 8 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\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}\StubPath = "C:\\Users\\Admin\\AppData\\Roaming\\mrsys.exe MR"	explorer.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}\StubPath = "C:\\Users\\Admin\\AppData\\Roaming\\mrsys.exe MR"	svchost.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	svchost.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}\StubPath = "C:\\Users\\Admin\\AppData\\Roaming\\mrsys.exe MR"	svchost.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}	svchost.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	explorer.exe

Executes dropped EXE 4 IoCs

pid	Process
3044	explorer.exe
3300	spoolsv.exe
4496	svchost.exe
1732	spoolsv.exe

UPX packed file 11 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2636-0-0x0000000000400000-0x0000000000434000-memory.dmp	upx
behavioral2/files/0x000a000000023531-7.dat	upx
behavioral2/files/0x0009000000023557-13.dat	upx
behavioral2/files/0x0009000000023559-24.dat	upx
behavioral2/memory/1732-33-0x0000000000400000-0x0000000000434000-memory.dmp	upx
behavioral2/memory/3300-37-0x0000000000400000-0x0000000000434000-memory.dmp	upx
behavioral2/memory/2636-38-0x0000000000400000-0x0000000000434000-memory.dmp	upx
behavioral2/files/0x000b000000023558-39.dat	upx
behavioral2/memory/3044-40-0x0000000000400000-0x0000000000434000-memory.dmp	upx
behavioral2/memory/4496-41-0x0000000000400000-0x0000000000434000-memory.dmp	upx
behavioral2/memory/3044-52-0x0000000000400000-0x0000000000434000-memory.dmp	upx

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\system\\explorer.exe RO"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\system\\svchost.exe RO"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\system\\explorer.exe RO"	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\system\\svchost.exe RO"	svchost.exe

Drops file in Windows directory 6 IoCs

description	ioc	Process
File opened for modification	\??\c:\windows\system\explorer.exe	a6a7d0449c2d8626b59d01dfa3899400N.exe
File opened for modification	\??\c:\windows\system\spoolsv.exe	explorer.exe
File opened for modification	\??\c:\windows\system\svchost.exe	spoolsv.exe
File opened for modification	\??\c:\windows\system\explorer.exe	explorer.exe
File opened for modification	\??\c:\windows\system\svchost.exe	svchost.exe
File opened for modification	C:\Windows\system\udsys.exe	explorer.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 7 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	spoolsv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	at.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	at.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a6a7d0449c2d8626b59d01dfa3899400N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2636	a6a7d0449c2d8626b59d01dfa3899400N.exe
2636	a6a7d0449c2d8626b59d01dfa3899400N.exe
3044	explorer.exe
3044	explorer.exe
3044	explorer.exe
3044	explorer.exe
3044	explorer.exe
3044	explorer.exe
3044	explorer.exe
4496	svchost.exe
3044	explorer.exe
4496	svchost.exe
4496	svchost.exe
4496	svchost.exe
3044	explorer.exe
4496	svchost.exe
3044	explorer.exe
4496	svchost.exe
3044	explorer.exe
4496	svchost.exe
3044	explorer.exe
4496	svchost.exe
3044	explorer.exe
4496	svchost.exe
3044	explorer.exe
4496	svchost.exe
4496	svchost.exe
4496	svchost.exe
3044	explorer.exe
3044	explorer.exe
3044	explorer.exe
4496	svchost.exe
3044	explorer.exe
4496	svchost.exe
3044	explorer.exe
3044	explorer.exe
4496	svchost.exe
4496	svchost.exe
3044	explorer.exe
4496	svchost.exe
3044	explorer.exe
4496	svchost.exe
4496	svchost.exe
3044	explorer.exe
4496	svchost.exe
3044	explorer.exe
3044	explorer.exe
3044	explorer.exe
4496	svchost.exe
4496	svchost.exe
3044	explorer.exe
4496	svchost.exe
4496	svchost.exe
3044	explorer.exe
3044	explorer.exe
4496	svchost.exe
3044	explorer.exe
4496	svchost.exe
3044	explorer.exe
4496	svchost.exe
4496	svchost.exe
3044	explorer.exe
3044	explorer.exe
3044	explorer.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
3044	explorer.exe
4496	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2636	a6a7d0449c2d8626b59d01dfa3899400N.exe
2636	a6a7d0449c2d8626b59d01dfa3899400N.exe
3044	explorer.exe
3044	explorer.exe
3300	spoolsv.exe
3300	spoolsv.exe
4496	svchost.exe
4496	svchost.exe
1732	spoolsv.exe
1732	spoolsv.exe
3044	explorer.exe
3044	explorer.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2636 wrote to memory of 3044	2636	a6a7d0449c2d8626b59d01dfa3899400N.exe	91
PID 2636 wrote to memory of 3044	2636	a6a7d0449c2d8626b59d01dfa3899400N.exe	91
PID 2636 wrote to memory of 3044	2636	a6a7d0449c2d8626b59d01dfa3899400N.exe	91
PID 3044 wrote to memory of 3300	3044	explorer.exe	92
PID 3044 wrote to memory of 3300	3044	explorer.exe	92
PID 3044 wrote to memory of 3300	3044	explorer.exe	92
PID 3300 wrote to memory of 4496	3300	spoolsv.exe	94
PID 3300 wrote to memory of 4496	3300	spoolsv.exe	94
PID 3300 wrote to memory of 4496	3300	spoolsv.exe	94
PID 4496 wrote to memory of 1732	4496	svchost.exe	95
PID 4496 wrote to memory of 1732	4496	svchost.exe	95
PID 4496 wrote to memory of 1732	4496	svchost.exe	95
PID 4496 wrote to memory of 4396	4496	svchost.exe	96
PID 4496 wrote to memory of 4396	4496	svchost.exe	96
PID 4496 wrote to memory of 4396	4496	svchost.exe	96
PID 4496 wrote to memory of 2768	4496	svchost.exe	109
PID 4496 wrote to memory of 2768	4496	svchost.exe	109
PID 4496 wrote to memory of 2768	4496	svchost.exe	109

C:\Users\Admin\AppData\Local\Temp\a6a7d0449c2d8626b59d01dfa3899400N.exe
"C:\Users\Admin\AppData\Local\Temp\a6a7d0449c2d8626b59d01dfa3899400N.exe"
1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2636
- \??\c:\windows\system\explorer.exe
  c:\windows\system\explorer.exe
  2⤵
  - Modifies WinLogon for persistence
  - Modifies visiblity of hidden/system files in Explorer
  - Boot or Logon Autostart Execution: Active Setup
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3044
- - \??\c:\windows\system\spoolsv.exe
    c:\windows\system\spoolsv.exe SE
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3300
  - - \??\c:\windows\system\svchost.exe
      c:\windows\system\svchost.exe
      4⤵
      Modifies WinLogon for persistence
      Modifies visiblity of hidden/system files in Explorer
      Boot or Logon Autostart Execution: Active Setup
      Executes dropped EXE
      Adds Run key to start application
      Drops file in Windows directory
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:4496
    - - \??\c:\windows\system\spoolsv.exe
        
        c:\windows\system\spoolsv.exe PR
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:1732
    - - C:\Windows\SysWOW64\at.exe
        
        at 03:05 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:4396
    - - C:\Windows\SysWOW64\at.exe
        
        at 03:06 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:2768

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 --field-trial-handle=4436,i,11251706013556949551,5157034131170452377,262144 --variations-seed-version --mojo-platform-channel-handle=4184 /prefetch:8
1⤵
PID:4500

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

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\mrsys.exe

Filesize
69KB

MD5
4fb8ce47569ef858462b653d61e302b5

SHA1
e321529d583224bab29cab8f54b4a82ba9cabf68

SHA256
3b876101e53e36c4f22e987da15bffa90e9fb9f4a55fb2e127c28de4de610643

SHA512
3368f8ec13289466f78595382ad380c3645821f946d3459eee4d1a42db37b5294000dee2d2ba25357e99993e9cbbe1c36086909124b656268ef43acd4d799eb0

Download Submit
C:\Windows\System\explorer.exe

Filesize
69KB

MD5
4b0587b42ccdbd3ff923eb3895990f24

SHA1
a74c8457023ec1567ba9a4f82b33d00f20610d2a

SHA256
e273534b69d6ec4454d8dffeca409153e7d6e29e218041048c7c29a887889e77

SHA512
51495689b6f16a21231c90700073594264962ca561544997cc80691434301b273ce292ec2a8bbcab8cda6e1cb505316959446115cd526c3d28491677b2baefe3

Download Submit
C:\Windows\System\spoolsv.exe

Filesize
70KB

MD5
bf6486cf75cd7d0e4e14387909fd52ce

SHA1
5c95a5ebc6e921cc6d6f496c1d9c1d4f57142c1f

SHA256
195b9caf5d35bde0e63520349129e0ea576f9d7e574184d7b8a2abe4623723eb

SHA512
e00b1571a92ecf133521872511a7661dc7d8adc49f3bd89619664caed2d96c79efd8545e3b263b018efd6831f661faab074bbdd1ab03c38e40c3723bb93c0d4e

Download Submit
\??\c:\windows\system\svchost.exe

Filesize
69KB

MD5
25d90e0ca04684cf4f463594e7c88044

SHA1
88a685690a0c648e57e38f9d99a5b907ec1a0a66

SHA256
804300d3d10db4c666df303ceb3a18787633cb8dbd3e8b03944eff8ff1da850b

SHA512
735d7bbf386b86c224dce53df36aaa7dcce2cf322be1dc8561cd7b5613f923ef72027a10dc2d307f974388ac11aa12324712f6feb4e4c7106d0d082ca665343e

Download Submit
memory/1732-33-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/2636-0-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/2636-38-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/3044-40-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/3044-52-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/3300-37-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/4496-41-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download