Analysis
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max time kernel
149s -
max time network
123s -
platform
windows7_x64 -
resource
win7-20240215-en -
resource tags
arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system -
submitted
10/03/2024, 23:47
Behavioral task
behavioral1
Sample
bf46c0f10ddd3a16518cdd366c48830b.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
bf46c0f10ddd3a16518cdd366c48830b.exe
Resource
win10v2004-20240226-en
General
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Target
bf46c0f10ddd3a16518cdd366c48830b.exe
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Size
344KB
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MD5
bf46c0f10ddd3a16518cdd366c48830b
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SHA1
1e5a63266a0fcfdcad8517e439f109977fbba0bc
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SHA256
30d17c665801b2bc713301552d45bad970be0e0ca90f09769a6ad385128ff12d
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SHA512
f35487040480142cbdb6be99b099471655d5f629c908607aaa988aecb99803b4a4119f5c4ab1c9754379cd372e355a91e202022590e9b677ceec3b9f7341e6a7
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SSDEEP
6144:9Hxi2fmOCRXHK4Ms/sjZfHyVZbGMGRC6xs/uZJkBYkRdTZCYGkoS:bJskj5SVoLRCBuEWkRdTEYGkoS
Malware Config
Signatures
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Modifies firewall policy service 2 TTPs 8 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile reg.exe Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DoNotAllowExceptions = "0" reg.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List reg.exe Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\Users\Admin\AppData\Roaming\SmallerDARK.exe = "C:\\Users\\Admin\\AppData\\Roaming\\SmallerDARK.exe:*:Enabled:Windows Messanger" reg.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile reg.exe Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DoNotAllowExceptions = "0" reg.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List reg.exe Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\Users\Admin\AppData\Roaming\%NON%\small.exe = "C:\\Users\\Admin\\AppData\\Roaming\\%NON%\\small.exe:*:Enabled:Windows Messanger" reg.exe -
Executes dropped EXE 3 IoCs
pid Process 2736 small.exe 2644 small.exe 2420 small.exe -
Loads dropped DLL 7 IoCs
pid Process 2460 bf46c0f10ddd3a16518cdd366c48830b.exe 2460 bf46c0f10ddd3a16518cdd366c48830b.exe 2460 bf46c0f10ddd3a16518cdd366c48830b.exe 2460 bf46c0f10ddd3a16518cdd366c48830b.exe 2460 bf46c0f10ddd3a16518cdd366c48830b.exe 2736 small.exe 2736 small.exe -
resource yara_rule behavioral1/memory/2460-0-0x0000000000400000-0x0000000000777000-memory.dmp upx behavioral1/files/0x000c00000001315b-24.dat upx behavioral1/memory/2460-36-0x0000000000400000-0x0000000000777000-memory.dmp upx behavioral1/memory/2736-40-0x0000000000400000-0x0000000000777000-memory.dmp upx behavioral1/memory/2736-45-0x0000000002B60000-0x0000000002ED7000-memory.dmp upx behavioral1/memory/2644-51-0x0000000000400000-0x0000000000473000-memory.dmp upx behavioral1/memory/2420-50-0x0000000000400000-0x0000000000409000-memory.dmp upx behavioral1/memory/2644-49-0x0000000000400000-0x0000000000473000-memory.dmp upx behavioral1/memory/2420-55-0x0000000000400000-0x0000000000409000-memory.dmp upx behavioral1/memory/2644-44-0x0000000000400000-0x0000000000473000-memory.dmp upx behavioral1/memory/2420-58-0x0000000000400000-0x0000000000409000-memory.dmp upx behavioral1/memory/2736-61-0x0000000000400000-0x0000000000777000-memory.dmp upx behavioral1/memory/2644-66-0x0000000000400000-0x0000000000473000-memory.dmp upx behavioral1/memory/2420-67-0x0000000000400000-0x0000000000409000-memory.dmp upx behavioral1/memory/2644-68-0x0000000000400000-0x0000000000473000-memory.dmp upx behavioral1/memory/2644-69-0x0000000000400000-0x0000000000473000-memory.dmp upx behavioral1/memory/2644-74-0x0000000000400000-0x0000000000473000-memory.dmp upx behavioral1/memory/2644-76-0x0000000000400000-0x0000000000473000-memory.dmp upx behavioral1/memory/2644-79-0x0000000000400000-0x0000000000473000-memory.dmp upx behavioral1/memory/2644-88-0x0000000000400000-0x0000000000473000-memory.dmp upx behavioral1/memory/2644-90-0x0000000000400000-0x0000000000473000-memory.dmp upx behavioral1/memory/2644-93-0x0000000000400000-0x0000000000473000-memory.dmp upx -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2248906074-2862704502-246302768-1000\Software\Microsoft\Windows\CurrentVersion\Run\mrecss = "C:\\Users\\Admin\\AppData\\Roaming\\\\small.exe" reg.exe -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 2736 set thread context of 2644 2736 small.exe 32 PID 2736 set thread context of 2420 2736 small.exe 33 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Modifies registry key 1 TTPs 4 IoCs
pid Process 2624 reg.exe 2448 reg.exe 1256 reg.exe 2668 reg.exe -
Suspicious use of AdjustPrivilegeToken 36 IoCs
description pid Process Token: SeDebugPrivilege 2420 small.exe Token: 1 2644 small.exe Token: SeCreateTokenPrivilege 2644 small.exe Token: SeAssignPrimaryTokenPrivilege 2644 small.exe Token: SeLockMemoryPrivilege 2644 small.exe Token: SeIncreaseQuotaPrivilege 2644 small.exe Token: SeMachineAccountPrivilege 2644 small.exe Token: SeTcbPrivilege 2644 small.exe Token: SeSecurityPrivilege 2644 small.exe Token: SeTakeOwnershipPrivilege 2644 small.exe Token: SeLoadDriverPrivilege 2644 small.exe Token: SeSystemProfilePrivilege 2644 small.exe Token: SeSystemtimePrivilege 2644 small.exe Token: SeProfSingleProcessPrivilege 2644 small.exe Token: SeIncBasePriorityPrivilege 2644 small.exe Token: SeCreatePagefilePrivilege 2644 small.exe Token: SeCreatePermanentPrivilege 2644 small.exe Token: SeBackupPrivilege 2644 small.exe Token: SeRestorePrivilege 2644 small.exe Token: SeShutdownPrivilege 2644 small.exe Token: SeDebugPrivilege 2644 small.exe Token: SeAuditPrivilege 2644 small.exe Token: SeSystemEnvironmentPrivilege 2644 small.exe Token: SeChangeNotifyPrivilege 2644 small.exe Token: SeRemoteShutdownPrivilege 2644 small.exe Token: SeUndockPrivilege 2644 small.exe Token: SeSyncAgentPrivilege 2644 small.exe Token: SeEnableDelegationPrivilege 2644 small.exe Token: SeManageVolumePrivilege 2644 small.exe Token: SeImpersonatePrivilege 2644 small.exe Token: SeCreateGlobalPrivilege 2644 small.exe Token: 31 2644 small.exe Token: 32 2644 small.exe Token: 33 2644 small.exe Token: 34 2644 small.exe Token: 35 2644 small.exe -
Suspicious use of SetWindowsHookEx 6 IoCs
pid Process 2460 bf46c0f10ddd3a16518cdd366c48830b.exe 2736 small.exe 2644 small.exe 2420 small.exe 2644 small.exe 2644 small.exe -
Suspicious use of WriteProcessMemory 62 IoCs
description pid Process procid_target PID 2460 wrote to memory of 2520 2460 bf46c0f10ddd3a16518cdd366c48830b.exe 28 PID 2460 wrote to memory of 2520 2460 bf46c0f10ddd3a16518cdd366c48830b.exe 28 PID 2460 wrote to memory of 2520 2460 bf46c0f10ddd3a16518cdd366c48830b.exe 28 PID 2460 wrote to memory of 2520 2460 bf46c0f10ddd3a16518cdd366c48830b.exe 28 PID 2520 wrote to memory of 2572 2520 cmd.exe 30 PID 2520 wrote to memory of 2572 2520 cmd.exe 30 PID 2520 wrote to memory of 2572 2520 cmd.exe 30 PID 2520 wrote to memory of 2572 2520 cmd.exe 30 PID 2460 wrote to memory of 2736 2460 bf46c0f10ddd3a16518cdd366c48830b.exe 31 PID 2460 wrote to memory of 2736 2460 bf46c0f10ddd3a16518cdd366c48830b.exe 31 PID 2460 wrote to memory of 2736 2460 bf46c0f10ddd3a16518cdd366c48830b.exe 31 PID 2460 wrote to memory of 2736 2460 bf46c0f10ddd3a16518cdd366c48830b.exe 31 PID 2736 wrote to memory of 2644 2736 small.exe 32 PID 2736 wrote to memory of 2644 2736 small.exe 32 PID 2736 wrote to memory of 2644 2736 small.exe 32 PID 2736 wrote to memory of 2644 2736 small.exe 32 PID 2736 wrote to memory of 2644 2736 small.exe 32 PID 2736 wrote to memory of 2644 2736 small.exe 32 PID 2736 wrote to memory of 2644 2736 small.exe 32 PID 2736 wrote to memory of 2644 2736 small.exe 32 PID 2736 wrote to memory of 2644 2736 small.exe 32 PID 2736 wrote to memory of 2420 2736 small.exe 33 PID 2736 wrote to memory of 2420 2736 small.exe 33 PID 2736 wrote to memory of 2420 2736 small.exe 33 PID 2736 wrote to memory of 2420 2736 small.exe 33 PID 2736 wrote to memory of 2420 2736 small.exe 33 PID 2736 wrote to memory of 2420 2736 small.exe 33 PID 2736 wrote to memory of 2420 2736 small.exe 33 PID 2736 wrote to memory of 2420 2736 small.exe 33 PID 2736 wrote to memory of 2420 2736 small.exe 33 PID 2644 wrote to memory of 2428 2644 small.exe 34 PID 2644 wrote to memory of 2428 2644 small.exe 34 PID 2644 wrote to memory of 2428 2644 small.exe 34 PID 2644 wrote to memory of 2428 2644 small.exe 34 PID 2644 wrote to memory of 2816 2644 small.exe 35 PID 2644 wrote to memory of 2816 2644 small.exe 35 PID 2644 wrote to memory of 2816 2644 small.exe 35 PID 2644 wrote to memory of 2816 2644 small.exe 35 PID 2644 wrote to memory of 3048 2644 small.exe 36 PID 2644 wrote to memory of 3048 2644 small.exe 36 PID 2644 wrote to memory of 3048 2644 small.exe 36 PID 2644 wrote to memory of 3048 2644 small.exe 36 PID 2644 wrote to memory of 2824 2644 small.exe 37 PID 2644 wrote to memory of 2824 2644 small.exe 37 PID 2644 wrote to memory of 2824 2644 small.exe 37 PID 2644 wrote to memory of 2824 2644 small.exe 37 PID 2816 wrote to memory of 1256 2816 cmd.exe 42 PID 2816 wrote to memory of 1256 2816 cmd.exe 42 PID 2816 wrote to memory of 1256 2816 cmd.exe 42 PID 2816 wrote to memory of 1256 2816 cmd.exe 42 PID 3048 wrote to memory of 2448 3048 cmd.exe 43 PID 3048 wrote to memory of 2448 3048 cmd.exe 43 PID 3048 wrote to memory of 2448 3048 cmd.exe 43 PID 3048 wrote to memory of 2448 3048 cmd.exe 43 PID 2428 wrote to memory of 2624 2428 cmd.exe 44 PID 2428 wrote to memory of 2624 2428 cmd.exe 44 PID 2428 wrote to memory of 2624 2428 cmd.exe 44 PID 2428 wrote to memory of 2624 2428 cmd.exe 44 PID 2824 wrote to memory of 2668 2824 cmd.exe 45 PID 2824 wrote to memory of 2668 2824 cmd.exe 45 PID 2824 wrote to memory of 2668 2824 cmd.exe 45 PID 2824 wrote to memory of 2668 2824 cmd.exe 45
Processes
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C:\Users\Admin\AppData\Local\Temp\bf46c0f10ddd3a16518cdd366c48830b.exe"C:\Users\Admin\AppData\Local\Temp\bf46c0f10ddd3a16518cdd366c48830b.exe"1⤵
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2460 -
C:\Windows\SysWOW64\cmd.execmd /c ""C:\Users\Admin\AppData\Local\Temp\GWsBQ.bat" "2⤵
- Suspicious use of WriteProcessMemory
PID:2520 -
C:\Windows\SysWOW64\reg.exeREG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "mrecss" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\\small.exe" /f3⤵
- Adds Run key to start application
PID:2572
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C:\Users\Admin\AppData\Roaming\%NON%\small.exe"C:\Users\Admin\AppData\Roaming\%NON%\small.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2736 -
C:\Users\Admin\AppData\Roaming\%NON%\small.exeFalse3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2644 -
C:\Windows\SysWOW64\cmd.execmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f4⤵
- Suspicious use of WriteProcessMemory
PID:2428 -
C:\Windows\SysWOW64\reg.exeREG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f5⤵
- Modifies firewall policy service
- Modifies registry key
PID:2624
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C:\Windows\SysWOW64\cmd.execmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Roaming\%NON%\small.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\%NON%\small.exe:*:Enabled:Windows Messanger" /f4⤵
- Suspicious use of WriteProcessMemory
PID:2816 -
C:\Windows\SysWOW64\reg.exeREG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Roaming\%NON%\small.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\%NON%\small.exe:*:Enabled:Windows Messanger" /f5⤵
- Modifies firewall policy service
- Modifies registry key
PID:1256
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C:\Windows\SysWOW64\cmd.execmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f4⤵
- Suspicious use of WriteProcessMemory
PID:3048 -
C:\Windows\SysWOW64\reg.exeREG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f5⤵
- Modifies firewall policy service
- Modifies registry key
PID:2448
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C:\Windows\SysWOW64\cmd.execmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Roaming\SmallerDARK.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\SmallerDARK.exe:*:Enabled:Windows Messanger" /f4⤵
- Suspicious use of WriteProcessMemory
PID:2824 -
C:\Windows\SysWOW64\reg.exeREG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Roaming\SmallerDARK.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\SmallerDARK.exe:*:Enabled:Windows Messanger" /f5⤵
- Modifies firewall policy service
- Modifies registry key
PID:2668
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C:\Users\Admin\AppData\Roaming\%NON%\small.exeFalse3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:2420
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Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Replay Monitor
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Downloads
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Filesize
137B
MD5b60a6d7bd543c2827d9ed1979606fcd6
SHA1de48b503245a05dff5f67e3035e2f512dea8aaf1
SHA25682ab509a50b5e03deee267ec940ea65c3588d54baf2986d08a90cd1a5f98dd71
SHA512c8d654632362862f1a8484c4e7fbc779c73f2f9cd554ee890326865c81eea89142df743a573c00ed08e8a37190871d1c1f33d31e8721f10a036246e2e0113cd0
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Filesize
344KB
MD5bf46c0f10ddd3a16518cdd366c48830b
SHA11e5a63266a0fcfdcad8517e439f109977fbba0bc
SHA25630d17c665801b2bc713301552d45bad970be0e0ca90f09769a6ad385128ff12d
SHA512f35487040480142cbdb6be99b099471655d5f629c908607aaa988aecb99803b4a4119f5c4ab1c9754379cd372e355a91e202022590e9b677ceec3b9f7341e6a7