Analysis
- max time kernel
148s - max time network
148s - platform
windows10_x64 - resource
win10v20201028 - submitted
09/11/2020, 20:49
Static task
static1
Behavioral task
behavioral1
Sample
34991b7520110a2b781dbb5000fbe3194dd2d5bff9951f7d682afff40b4a91b8.exe
Resource
win7v20201028
windows7_x64
0 signatures
0 seconds
Behavioral task
behavioral2
Sample
34991b7520110a2b781dbb5000fbe3194dd2d5bff9951f7d682afff40b4a91b8.exe
Resource
win10v20201028
windows10_x64
0 signatures
0 seconds
General
- Target 34991b7520110a2b781dbb5000fbe3194dd2d5bff9951f7d682afff40b4a91b8.exe
- Size 1.1MB
- Sample201109-qaez7jbd5a
- SHA256 34991b7520110a2b781dbb5000fbe3194dd2d5bff9951f7d682afff40b4a91b8
- MD5 87c405e591beb831088d908dad3d5d79
- SHA1 1bde488591b324ccd07416d805087944c1f64efe
- SHA512 d8cea6ebdf272770cd4ba4f84d177fa9a80592b7028cc94b543dde7fae9d32aaadef840fc3272a544b50c5e02a88b90526b111f1863b394b7e95f8fdc505cef5
- MD5 SHA1 SHA512
Score
10/10
Malware Config
Extracted
Family
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remcos
C2
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daya4659.ddns.net:8282
Signatures
- Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs
description pid Process procid_target PID 2716 created 2128 2716 WerFault.exe 85 - ServiceHost packer 3 IoCs
Detects ServiceHost packer used for .NET malware
resource yara_rule behavioral2/memory/2128-17-0x000000000042800A-mapping.dmp servicehost behavioral2/memory/2128-19-0x000000000042800A-mapping.dmp servicehost behavioral2/memory/2128-18-0x000000000042800A-mapping.dmp servicehost - Executes dropped EXE 6 IoCs
pid Process 1100 remcos.exe 8 remcos.exe 1180 sfc.exe 208 sfc.exe 4000 sfc.exe 1612 sfc.exe - Adds Run key to start application 2 TTPs 8 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\remcos.exe\"" 34991b7520110a2b781dbb5000fbe3194dd2d5bff9951f7d682afff40b4a91b8.exe Key created \REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\ remcos.exe Set value (str) \REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\remcos.exe\"" remcos.exe Key created \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ remcos.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\remcos.exe\"" remcos.exe Key created \REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\ 34991b7520110a2b781dbb5000fbe3194dd2d5bff9951f7d682afff40b4a91b8.exe Set value (str) \REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\remcos.exe\"" 34991b7520110a2b781dbb5000fbe3194dd2d5bff9951f7d682afff40b4a91b8.exe Key created \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ 34991b7520110a2b781dbb5000fbe3194dd2d5bff9951f7d682afff40b4a91b8.exe - Suspicious use of SetThreadContext 5 IoCs
description pid Process procid_target PID 796 set thread context of 3824 796 34991b7520110a2b781dbb5000fbe3194dd2d5bff9951f7d682afff40b4a91b8.exe 75 PID 1100 set thread context of 8 1100 remcos.exe 84 PID 8 set thread context of 2128 8 remcos.exe 85 PID 1180 set thread context of 208 1180 sfc.exe 92 PID 4000 set thread context of 1612 4000 sfc.exe 96 - Program crash 1 IoCs
pid pid_target Process procid_target 2716 2128 WerFault.exe 85 - Creates scheduled task(s) 1 TTPs 4 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 1764 schtasks.exe 3796 schtasks.exe 616 schtasks.exe 1620 schtasks.exe - Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000_Classes\Local Settings 34991b7520110a2b781dbb5000fbe3194dd2d5bff9951f7d682afff40b4a91b8.exe - Suspicious behavior: EnumeratesProcesses 15 IoCs
pid Process 2716 WerFault.exe 2716 WerFault.exe 2716 WerFault.exe 2716 WerFault.exe 2716 WerFault.exe 2716 WerFault.exe 2716 WerFault.exe 2716 WerFault.exe 2716 WerFault.exe 2716 WerFault.exe 2716 WerFault.exe 2716 WerFault.exe 2716 WerFault.exe 2716 WerFault.exe 2716 WerFault.exe - Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 8 remcos.exe - Suspicious use of AdjustPrivilegeToken 3 IoCs
description pid Process Token: SeRestorePrivilege 2716 WerFault.exe Token: SeBackupPrivilege 2716 WerFault.exe Token: SeDebugPrivilege 2716 WerFault.exe - Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 8 remcos.exe - Suspicious use of WriteProcessMemory 51 IoCs
description pid Process procid_target PID 796 wrote to memory of 3824 796 34991b7520110a2b781dbb5000fbe3194dd2d5bff9951f7d682afff40b4a91b8.exe 75 PID 796 wrote to memory of 3824 796 34991b7520110a2b781dbb5000fbe3194dd2d5bff9951f7d682afff40b4a91b8.exe 75 PID 796 wrote to memory of 3824 796 34991b7520110a2b781dbb5000fbe3194dd2d5bff9951f7d682afff40b4a91b8.exe 75 PID 796 wrote to memory of 3824 796 34991b7520110a2b781dbb5000fbe3194dd2d5bff9951f7d682afff40b4a91b8.exe 75 PID 796 wrote to memory of 3824 796 34991b7520110a2b781dbb5000fbe3194dd2d5bff9951f7d682afff40b4a91b8.exe 75 PID 3824 wrote to memory of 792 3824 34991b7520110a2b781dbb5000fbe3194dd2d5bff9951f7d682afff40b4a91b8.exe 76 PID 3824 wrote to memory of 792 3824 34991b7520110a2b781dbb5000fbe3194dd2d5bff9951f7d682afff40b4a91b8.exe 76 PID 3824 wrote to memory of 792 3824 34991b7520110a2b781dbb5000fbe3194dd2d5bff9951f7d682afff40b4a91b8.exe 76 PID 796 wrote to memory of 1764 796 34991b7520110a2b781dbb5000fbe3194dd2d5bff9951f7d682afff40b4a91b8.exe 77 PID 796 wrote to memory of 1764 796 34991b7520110a2b781dbb5000fbe3194dd2d5bff9951f7d682afff40b4a91b8.exe 77 PID 796 wrote to memory of 1764 796 34991b7520110a2b781dbb5000fbe3194dd2d5bff9951f7d682afff40b4a91b8.exe 77 PID 792 wrote to memory of 3372 792 WScript.exe 79 PID 792 wrote to memory of 3372 792 WScript.exe 79 PID 792 wrote to memory of 3372 792 WScript.exe 79 PID 3372 wrote to memory of 1100 3372 cmd.exe 81 PID 3372 wrote to memory of 1100 3372 cmd.exe 81 PID 3372 wrote to memory of 1100 3372 cmd.exe 81 PID 1100 wrote to memory of 8 1100 remcos.exe 84 PID 1100 wrote to memory of 8 1100 remcos.exe 84 PID 1100 wrote to memory of 8 1100 remcos.exe 84 PID 1100 wrote to memory of 8 1100 remcos.exe 84 PID 1100 wrote to memory of 8 1100 remcos.exe 84 PID 8 wrote to memory of 2128 8 remcos.exe 85 PID 8 wrote to memory of 2128 8 remcos.exe 85 PID 8 wrote to memory of 2128 8 remcos.exe 85 PID 8 wrote to memory of 2128 8 remcos.exe 85 PID 8 wrote to memory of 2128 8 remcos.exe 85 PID 8 wrote to memory of 2128 8 remcos.exe 85 PID 8 wrote to memory of 2128 8 remcos.exe 85 PID 8 wrote to memory of 2128 8 remcos.exe 85 PID 8 wrote to memory of 2128 8 remcos.exe 85 PID 8 wrote to memory of 2128 8 remcos.exe 85 PID 1100 wrote to memory of 3796 1100 remcos.exe 89 PID 1100 wrote to memory of 3796 1100 remcos.exe 89 PID 1100 wrote to memory of 3796 1100 remcos.exe 89 PID 1180 wrote to memory of 208 1180 sfc.exe 92 PID 1180 wrote to memory of 208 1180 sfc.exe 92 PID 1180 wrote to memory of 208 1180 sfc.exe 92 PID 1180 wrote to memory of 208 1180 sfc.exe 92 PID 1180 wrote to memory of 208 1180 sfc.exe 92 PID 1180 wrote to memory of 616 1180 sfc.exe 93 PID 1180 wrote to memory of 616 1180 sfc.exe 93 PID 1180 wrote to memory of 616 1180 sfc.exe 93 PID 4000 wrote to memory of 1612 4000 sfc.exe 96 PID 4000 wrote to memory of 1612 4000 sfc.exe 96 PID 4000 wrote to memory of 1612 4000 sfc.exe 96 PID 4000 wrote to memory of 1612 4000 sfc.exe 96 PID 4000 wrote to memory of 1612 4000 sfc.exe 96 PID 4000 wrote to memory of 1620 4000 sfc.exe 97 PID 4000 wrote to memory of 1620 4000 sfc.exe 97 PID 4000 wrote to memory of 1620 4000 sfc.exe 97
Processes
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C:\Users\Admin\AppData\Local\Temp\34991b7520110a2b781dbb5000fbe3194dd2d5bff9951f7d682afff40b4a91b8.exe"C:\Users\Admin\AppData\Local\Temp\34991b7520110a2b781dbb5000fbe3194dd2d5bff9951f7d682afff40b4a91b8.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:796 -
C:\Users\Admin\AppData\Local\Temp\34991b7520110a2b781dbb5000fbe3194dd2d5bff9951f7d682afff40b4a91b8.exe"C:\Users\Admin\AppData\Local\Temp\34991b7520110a2b781dbb5000fbe3194dd2d5bff9951f7d682afff40b4a91b8.exe"2⤵
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:3824 -
C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"3⤵
- Suspicious use of WriteProcessMemory
PID:792 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\remcos\remcos.exe"4⤵
- Suspicious use of WriteProcessMemory
PID:3372 -
C:\Users\Admin\AppData\Roaming\remcos\remcos.exeC:\Users\Admin\AppData\Roaming\remcos\remcos.exe5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1100 -
C:\Users\Admin\AppData\Roaming\remcos\remcos.exe"C:\Users\Admin\AppData\Roaming\remcos\remcos.exe"6⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:8 -
C:\Windows\SysWOW64\svchost.exeC:\Windows\SysWOW64\svchost.exe7⤵PID:2128
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2128 -s 5768⤵
- Suspicious use of NtCreateProcessExOtherParentProcess
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2716
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\SysWOW64\schtasks.exe" /create /tn setx /tr "C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe" /sc minute /mo 1 /F6⤵
- Creates scheduled task(s)
PID:3796
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\SysWOW64\schtasks.exe" /create /tn setx /tr "C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe" /sc minute /mo 1 /F2⤵
- Creates scheduled task(s)
PID:1764
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C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exeC:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1180 -
C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe"C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe"2⤵
- Executes dropped EXE
PID:208
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\SysWOW64\schtasks.exe" /create /tn setx /tr "C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe" /sc minute /mo 1 /F2⤵
- Creates scheduled task(s)
PID:616
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C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exeC:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4000 -
C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe"C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe"2⤵
- Executes dropped EXE
PID:1612
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\SysWOW64\schtasks.exe" /create /tn setx /tr "C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe" /sc minute /mo 1 /F2⤵
- Creates scheduled task(s)
PID:1620
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