Analysis
- max time kernel
150s - max time network
105s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system - submitted
04/06/2024, 01:54
Behavioral task
behavioral1
Sample
b6c2df057d0e11dabe39fe1800793d5b0b59d249f0ac0e353092fb9fb5c0ec73.exe
Resource
win7-20240508-en
windows7-x64
14 signatures
150 seconds
Behavioral task
behavioral2
Sample
b6c2df057d0e11dabe39fe1800793d5b0b59d249f0ac0e353092fb9fb5c0ec73.exe
Resource
win10v2004-20240508-en
windows10-2004-x64
13 signatures
150 seconds
General
- Target b6c2df057d0e11dabe39fe1800793d5b0b59d249f0ac0e353092fb9fb5c0ec73.exe
- Size 69KB
- Sample240604-cbr8laaa78
- SHA256 b6c2df057d0e11dabe39fe1800793d5b0b59d249f0ac0e353092fb9fb5c0ec73
- MD5 662caade13e8e4916b54ccd4a6037d64
- SHA1 9b041029547ed8bb9527b03af24025cb63241f12
- SHA512 a0de95b2fba0c2143df83ab4207be759b91f17addc4795a1561bec8383c8cc38d05c5af72125fd7cd34400c6f3ca4de97be3c037373dfb3473c0c2b6e1bda8e2
- SSDEEP 1536:EJrFDMRyriCY/qXfatMp4Q2V6fIMxIpLi:0F8dCY85TE6fIMSRi
- MD5 SHA1 SHA512 SSDEEP
Score
10/10
Malware Config
Signatures
- Modifies WinLogon for persistence 2 TTPs 2 IoCs
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
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" explorer.exe Set value (int) \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" svchost.exe - UPX dump on OEP (original entry point) 12 IoCs
resource yara_rule behavioral2/memory/1916-0-0x0000000000400000-0x0000000000434000-memory.dmp UPX behavioral2/files/0x000a0000000233ea-7.dat UPX behavioral2/files/0x0008000000023403-13.dat UPX behavioral2/files/0x0008000000023406-23.dat UPX behavioral2/memory/4744-26-0x0000000000400000-0x0000000000434000-memory.dmp UPX behavioral2/memory/1256-34-0x0000000000400000-0x0000000000434000-memory.dmp UPX behavioral2/memory/3184-37-0x0000000000400000-0x0000000000434000-memory.dmp UPX behavioral2/memory/1916-39-0x0000000000400000-0x0000000000434000-memory.dmp UPX behavioral2/files/0x0009000000023404-40.dat UPX behavioral2/memory/3848-41-0x0000000000400000-0x0000000000434000-memory.dmp UPX behavioral2/memory/4744-42-0x0000000000400000-0x0000000000434000-memory.dmp UPX behavioral2/memory/3848-51-0x0000000000400000-0x0000000000434000-memory.dmp UPX - Modifies Installed Components in the registry 2 TTPs 8 IoCs
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 3848 explorer.exe 3184 spoolsv.exe 4744 svchost.exe 1256 spoolsv.exe -
resource yara_rule behavioral2/memory/1916-0-0x0000000000400000-0x0000000000434000-memory.dmp upx behavioral2/files/0x000a0000000233ea-7.dat upx behavioral2/files/0x0008000000023403-13.dat upx behavioral2/files/0x0008000000023406-23.dat upx behavioral2/memory/4744-26-0x0000000000400000-0x0000000000434000-memory.dmp upx behavioral2/memory/1256-34-0x0000000000400000-0x0000000000434000-memory.dmp upx behavioral2/memory/3184-37-0x0000000000400000-0x0000000000434000-memory.dmp upx behavioral2/memory/1916-39-0x0000000000400000-0x0000000000434000-memory.dmp upx behavioral2/files/0x0009000000023404-40.dat upx behavioral2/memory/3848-41-0x0000000000400000-0x0000000000434000-memory.dmp upx behavioral2/memory/4744-42-0x0000000000400000-0x0000000000434000-memory.dmp upx behavioral2/memory/3848-51-0x0000000000400000-0x0000000000434000-memory.dmp upx - Adds Run key to start application 2 TTPs 4 IoCs
description ioc Process 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 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 - Drops file in Windows directory 6 IoCs
description ioc Process 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 File opened for modification \??\c:\windows\system\explorer.exe b6c2df057d0e11dabe39fe1800793d5b0b59d249f0ac0e353092fb9fb5c0ec73.exe File opened for modification \??\c:\windows\system\spoolsv.exe explorer.exe File opened for modification \??\c:\windows\system\svchost.exe spoolsv.exe - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 1916 b6c2df057d0e11dabe39fe1800793d5b0b59d249f0ac0e353092fb9fb5c0ec73.exe 1916 b6c2df057d0e11dabe39fe1800793d5b0b59d249f0ac0e353092fb9fb5c0ec73.exe 3848 explorer.exe 3848 explorer.exe 3848 explorer.exe 3848 explorer.exe 3848 explorer.exe 3848 explorer.exe 3848 explorer.exe 3848 explorer.exe 4744 svchost.exe 4744 svchost.exe 4744 svchost.exe 4744 svchost.exe 4744 svchost.exe 3848 explorer.exe 3848 explorer.exe 4744 svchost.exe 3848 explorer.exe 4744 svchost.exe 3848 explorer.exe 4744 svchost.exe 3848 explorer.exe 4744 svchost.exe 4744 svchost.exe 3848 explorer.exe 3848 explorer.exe 4744 svchost.exe 3848 explorer.exe 4744 svchost.exe 4744 svchost.exe 3848 explorer.exe 4744 svchost.exe 3848 explorer.exe 4744 svchost.exe 3848 explorer.exe 3848 explorer.exe 4744 svchost.exe 3848 explorer.exe 4744 svchost.exe 3848 explorer.exe 4744 svchost.exe 4744 svchost.exe 3848 explorer.exe 3848 explorer.exe 4744 svchost.exe 4744 svchost.exe 3848 explorer.exe 3848 explorer.exe 4744 svchost.exe 4744 svchost.exe 4744 svchost.exe 3848 explorer.exe 3848 explorer.exe 4744 svchost.exe 3848 explorer.exe 3848 explorer.exe 4744 svchost.exe 4744 svchost.exe 4744 svchost.exe 3848 explorer.exe 3848 explorer.exe 4744 svchost.exe 3848 explorer.exe - Suspicious behavior: GetForegroundWindowSpam 2 IoCs
pid Process 3848 explorer.exe 4744 svchost.exe - Suspicious use of SetWindowsHookEx 12 IoCs
pid Process 1916 b6c2df057d0e11dabe39fe1800793d5b0b59d249f0ac0e353092fb9fb5c0ec73.exe 1916 b6c2df057d0e11dabe39fe1800793d5b0b59d249f0ac0e353092fb9fb5c0ec73.exe 3848 explorer.exe 3848 explorer.exe 3184 spoolsv.exe 3184 spoolsv.exe 4744 svchost.exe 4744 svchost.exe 1256 spoolsv.exe 1256 spoolsv.exe 3848 explorer.exe 3848 explorer.exe - Suspicious use of WriteProcessMemory 21 IoCs
description pid Process procid_target PID 1916 wrote to memory of 3848 1916 b6c2df057d0e11dabe39fe1800793d5b0b59d249f0ac0e353092fb9fb5c0ec73.exe 82 PID 1916 wrote to memory of 3848 1916 b6c2df057d0e11dabe39fe1800793d5b0b59d249f0ac0e353092fb9fb5c0ec73.exe 82 PID 1916 wrote to memory of 3848 1916 b6c2df057d0e11dabe39fe1800793d5b0b59d249f0ac0e353092fb9fb5c0ec73.exe 82 PID 3848 wrote to memory of 3184 3848 explorer.exe 83 PID 3848 wrote to memory of 3184 3848 explorer.exe 83 PID 3848 wrote to memory of 3184 3848 explorer.exe 83 PID 3184 wrote to memory of 4744 3184 spoolsv.exe 84 PID 3184 wrote to memory of 4744 3184 spoolsv.exe 84 PID 3184 wrote to memory of 4744 3184 spoolsv.exe 84 PID 4744 wrote to memory of 1256 4744 svchost.exe 85 PID 4744 wrote to memory of 1256 4744 svchost.exe 85 PID 4744 wrote to memory of 1256 4744 svchost.exe 85 PID 4744 wrote to memory of 3704 4744 svchost.exe 86 PID 4744 wrote to memory of 3704 4744 svchost.exe 86 PID 4744 wrote to memory of 3704 4744 svchost.exe 86 PID 4744 wrote to memory of 4180 4744 svchost.exe 104 PID 4744 wrote to memory of 4180 4744 svchost.exe 104 PID 4744 wrote to memory of 4180 4744 svchost.exe 104 PID 4744 wrote to memory of 5024 4744 svchost.exe 114 PID 4744 wrote to memory of 5024 4744 svchost.exe 114 PID 4744 wrote to memory of 5024 4744 svchost.exe 114
Processes
-
C:\Users\Admin\AppData\Local\Temp\b6c2df057d0e11dabe39fe1800793d5b0b59d249f0ac0e353092fb9fb5c0ec73.exe"C:\Users\Admin\AppData\Local\Temp\b6c2df057d0e11dabe39fe1800793d5b0b59d249f0ac0e353092fb9fb5c0ec73.exe"1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1916 -
\??\c:\windows\system\explorer.exec:\windows\system\explorer.exe2⤵
- Modifies WinLogon for persistence
- Modifies visiblity of hidden/system files in Explorer
- Modifies Installed Components in the registry
- Executes dropped EXE
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3848 -
\??\c:\windows\system\spoolsv.exec:\windows\system\spoolsv.exe SE3⤵
- Executes dropped EXE
- Drops file in Windows directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3184 -
\??\c:\windows\system\svchost.exec:\windows\system\svchost.exe4⤵
- Modifies WinLogon for persistence
- Modifies visiblity of hidden/system files in Explorer
- Modifies Installed Components in the registry
- Executes dropped EXE
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4744 -
\??\c:\windows\system\spoolsv.exec:\windows\system\spoolsv.exe PR5⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:1256
-
-
C:\Windows\SysWOW64\at.exeat 01:56 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe5⤵PID:3704
-
-
C:\Windows\SysWOW64\at.exeat 01:57 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe5⤵PID:4180
-
-
C:\Windows\SysWOW64\at.exeat 01:58 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe5⤵PID:5024
-
-
-
-
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
3Registry Run Keys / Startup Folder
2Winlogon Helper DLL
1Privilege Escalation
Boot or Logon Autostart Execution
3Registry Run Keys / Startup Folder
2Winlogon Helper DLL
1Replay Monitor
Loading Replay Monitor...
Downloads
- Path C:\Users\Admin\AppData\Roaming\mrsys.exe
- Size 69KB
- SHA256 a31ad5b6a3f7c74904c6eaca49955e1a146a0f7e5229b32ae257fb5bd45c2e0f
- MD5 ee31c5c2db1fb966819838f5566a2ebd
- SHA1 b148d17e7fe124e0cd4513965653fd33fda9badb
- SHA512 e1da122b325458972aaf467fce09982f9d8e0ae7079b642e0a37f10748c324b2e1112e28590ef2db8394dc19ed37b09770fbc0f80810ffcf3ad14421f8de7fd6
- SSDEEP 1536:EJrFDMRyriCY/qXfatMp4Q2V6fIMxIpL9:0F8dCY85TE6fIMSR9
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Windows\System\explorer.exe
- Size 69KB
- SHA256 26db21c1a9ca0cd622ef68487bdfe02649fffbce034ede5334993de6046af860
- MD5 ac89a3c1258cfc91e7666c8f3582e6f5
- SHA1 a173699be34ac2b226f000159c1b13d451c5fc10
- SHA512 aaaa2bef8e026c387b320fde53374bc803193b5801ecea3106135d33e06d455640569ce65f5e55fa5fc112182481fb900f2f415bd0a7b2153bff29354712d546
- SSDEEP 1536:EJrFDMRyriCY/qXfatMp4Q2V6fIMxIpLA:0F8dCY85TE6fIMSRA
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Windows\System\spoolsv.exe
- Size 69KB
- SHA256 ff6808a428ba270a6d5dc8be5c49380029167ecc858ccf1acee44dbe82c6f582
- MD5 aaadbe3e77b118332bd6e852d6dc0deb
- SHA1 1b6395b2f559db477d242d797b75af340dbc875f
- SHA512 49f627f3c76337d015dfc09d7b56004ac9b128b2f3594cfce436898739007a711f08f0d72a8680835b0d9d4df11d0170597ba1c5ced084430f4ca929335ed1c0
- SSDEEP 1536:EJrFDMRyriCY/qXfatMp4Q2V6fIMxIpLN:0F8dCY85TE6fIMSRN
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Windows\System\svchost.exe
- Size 69KB
- SHA256 27841ff0d67a5f0711721fd08237c235239422e7ba6a6e3f3c343f22fb21ceb6
- MD5 fad08203bc91b117e45ae1d8f20ce5f8
- SHA1 ce2a4e44bb8ab45d0ddc9e6bb2bab6b7eb87a7f0
- SHA512 5737f58a94b61e891cda9a14b0e5e99c0fe0b72a291df458f21a4efa4eacdb367c4437782f9c50e261186f7744a534fedc74797e9381df607e0f6be4590ed9c9
- SSDEEP 1536:EJrFDMRyriCY/qXfatMp4Q2V6fIMxIpL4:0F8dCY85TE6fIMSR4
- MD5 SHA1 SHA512 SSDEEP