Analysis
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max time kernel
150s -
max time network
165s -
platform
windows7_x64 -
resource
win7v20210408 -
submitted
03-09-2021 09:06
Behavioral task
behavioral1
Sample
cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe
Resource
win7v20210408
General
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Target
cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe
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Size
792KB
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MD5
4ef1927705d28faf8456c200397d0af6
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SHA1
b92ab805e7c2884abcf371179b0d8989c4f90025
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SHA256
cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc
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SHA512
fe7f2405a8beb2bd70cfc689ce5ea3fc2cc4e03c72c925db698ea0e56b269b3e66c20f88afc382ea734e39b25cf66b0bcf24d72dab12d1b791ef91c690af17ac
Malware Config
Extracted
quasar
2.1.0.0
Office04
192.168.1.154:4782
VNM_MUTEX_ph9lkMeWS6xgznetvP
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encryption_key
2ABr09PX2FCCobHek8sv
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install_name
Client.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
Venom Client Startup
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subdirectory
SubDir
Signatures
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Contains code to disable Windows Defender 3 IoCs
A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.
Processes:
resource yara_rule behavioral1/files/0x00040000000130e1-65.dat disable_win_def behavioral1/files/0x00040000000130e1-67.dat disable_win_def behavioral1/files/0x00040000000130e1-68.dat disable_win_def -
Quasar Payload 3 IoCs
Processes:
resource yara_rule behavioral1/files/0x00040000000130e1-65.dat family_quasar behavioral1/files/0x00040000000130e1-67.dat family_quasar behavioral1/files/0x00040000000130e1-68.dat family_quasar -
Executes dropped EXE 1 IoCs
Processes:
Client.exepid Process 1624 Client.exe -
Loads dropped DLL 1 IoCs
Processes:
cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exepid Process 1080 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe -
Processes:
cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exedescription ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0" cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe -
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 5 ip-api.com -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
Processes:
schtasks.exeschtasks.exepid Process 1544 schtasks.exe 676 schtasks.exe -
Processes:
cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exedescription ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436\Blob = 04000000010000001000000079e4a9840d7d3a96d7c04fe2434c892e0f0000000100000014000000b34ddd372ed92e8f2abfbb9e20a9d31f204f194b090000000100000034000000303206082b0601050507030106082b0601050507030206082b0601050507030406082b0601050507030306082b0601050507030814000000010000001400000003de503556d14cbb66f0a3e21b1bc397b23dd1550b00000001000000120000004400690067006900430065007200740000001d000000010000001000000059779e39e21a2e3dfced6857ed5c5fd9030000000100000014000000a8985d3a65e5e5c4b2d7d66d40c6dd2fb19c54361900000001000000100000000f3a0527d242de2dc98e5cfcb1e991ee2000000001000000b3030000308203af30820297a0030201020210083be056904246b1a1756ac95991c74a300d06092a864886f70d01010505003061310b300906035504061302555331153013060355040a130c446967694365727420496e6331193017060355040b13107777772e64696769636572742e636f6d3120301e06035504031317446967694365727420476c6f62616c20526f6f74204341301e170d3036313131303030303030305a170d3331313131303030303030305a3061310b300906035504061302555331153013060355040a130c446967694365727420496e6331193017060355040b13107777772e64696769636572742e636f6d3120301e06035504031317446967694365727420476c6f62616c20526f6f7420434130820122300d06092a864886f70d01010105000382010f003082010a0282010100e23be11172dea8a4d3a357aa50a28f0b7790c9a2a5ee12ce965b010920cc0193a74e30b753f743c46900579de28d22dd870640008109cece1b83bfdfcd3b7146e2d666c705b37627168f7b9e1e957deeb748a308dad6af7a0c3906657f4a5d1fbc17f8abbeee28d7747f7a78995985686e5c23324bbf4ec0e85a6de370bf7710bffc01f685d9a844105832a97518d5d1a2be47e2276af49a33f84908608bd45fb43a84bfa1aa4a4c7d3ecf4f5f6c765ea04b37919edc22e66dce141a8e6acbfecdb3146417c75b299e32bff2eefad30b42d4abb74132da0cd4eff881d5bb8d583fb51be84928a270da3104ddf7b216f24c0a4e07a8ed4a3d5eb57fa390c3af270203010001a3633061300e0603551d0f0101ff040403020186300f0603551d130101ff040530030101ff301d0603551d0e0416041403de503556d14cbb66f0a3e21b1bc397b23dd155301f0603551d2304183016801403de503556d14cbb66f0a3e21b1bc397b23dd155300d06092a864886f70d01010505000382010100cb9c37aa4813120afadd449c4f52b0f4dfae04f5797908a32418fc4b2b84c02db9d5c7fef4c11f58cbb86d9c7a74e79829ab11b5e370a0a1cd4c8899938c9170e2ab0f1cbe93a9ff63d5e40760d3a3bf9d5b09f1d58ee353f48e63fa3fa7dbb466df6266d6d16e418df22db5ea774a9f9d58e22b59c04023ed2d2882453e7954922698e08048a837eff0d6796016deace80ecd6eac4417382f49dae1453e2ab93653cf3a5006f72ee8c457496c612118d504ad783c2c3a806ba7ebaf1514e9d889c1b9386ce2916c8aff64b977255730c01b24a3e1dce9df477cb5b424080530ec2dbd0bbf45bf50b9a9f3eb980112adc888c698345f8d0a3cc6e9d595956dde cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe -
Runs ping.exe 1 TTPs 1 IoCs
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Suspicious behavior: EnumeratesProcesses 10 IoCs
Processes:
powershell.execd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.execd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exepid Process 1740 powershell.exe 1740 powershell.exe 1080 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe 1080 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe 1080 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe 1080 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe 1080 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe 1080 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe 1080 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe 1744 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe -
Suspicious use of AdjustPrivilegeToken 5 IoCs
Processes:
cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exepowershell.exeClient.execd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exedescription pid Process Token: SeDebugPrivilege 1080 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe Token: SeDebugPrivilege 1740 powershell.exe Token: SeDebugPrivilege 1624 Client.exe Token: SeDebugPrivilege 1624 Client.exe Token: SeDebugPrivilege 1744 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
Client.exepid Process 1624 Client.exe -
Suspicious use of WriteProcessMemory 40 IoCs
Processes:
cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exeClient.execmd.execmd.exedescription pid Process procid_target PID 1080 wrote to memory of 1544 1080 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe 30 PID 1080 wrote to memory of 1544 1080 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe 30 PID 1080 wrote to memory of 1544 1080 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe 30 PID 1080 wrote to memory of 1544 1080 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe 30 PID 1080 wrote to memory of 1624 1080 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe 32 PID 1080 wrote to memory of 1624 1080 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe 32 PID 1080 wrote to memory of 1624 1080 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe 32 PID 1080 wrote to memory of 1624 1080 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe 32 PID 1080 wrote to memory of 1740 1080 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe 33 PID 1080 wrote to memory of 1740 1080 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe 33 PID 1080 wrote to memory of 1740 1080 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe 33 PID 1080 wrote to memory of 1740 1080 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe 33 PID 1624 wrote to memory of 676 1624 Client.exe 35 PID 1624 wrote to memory of 676 1624 Client.exe 35 PID 1624 wrote to memory of 676 1624 Client.exe 35 PID 1624 wrote to memory of 676 1624 Client.exe 35 PID 1080 wrote to memory of 1384 1080 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe 37 PID 1080 wrote to memory of 1384 1080 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe 37 PID 1080 wrote to memory of 1384 1080 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe 37 PID 1080 wrote to memory of 1384 1080 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe 37 PID 1384 wrote to memory of 1640 1384 cmd.exe 39 PID 1384 wrote to memory of 1640 1384 cmd.exe 39 PID 1384 wrote to memory of 1640 1384 cmd.exe 39 PID 1384 wrote to memory of 1640 1384 cmd.exe 39 PID 1080 wrote to memory of 1436 1080 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe 40 PID 1080 wrote to memory of 1436 1080 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe 40 PID 1080 wrote to memory of 1436 1080 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe 40 PID 1080 wrote to memory of 1436 1080 cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe 40 PID 1436 wrote to memory of 824 1436 cmd.exe 42 PID 1436 wrote to memory of 824 1436 cmd.exe 42 PID 1436 wrote to memory of 824 1436 cmd.exe 42 PID 1436 wrote to memory of 824 1436 cmd.exe 42 PID 1436 wrote to memory of 1368 1436 cmd.exe 43 PID 1436 wrote to memory of 1368 1436 cmd.exe 43 PID 1436 wrote to memory of 1368 1436 cmd.exe 43 PID 1436 wrote to memory of 1368 1436 cmd.exe 43 PID 1436 wrote to memory of 1744 1436 cmd.exe 44 PID 1436 wrote to memory of 1744 1436 cmd.exe 44 PID 1436 wrote to memory of 1744 1436 cmd.exe 44 PID 1436 wrote to memory of 1744 1436 cmd.exe 44
Processes
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C:\Users\Admin\AppData\Local\Temp\cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe"C:\Users\Admin\AppData\Local\Temp\cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe"1⤵
- Loads dropped DLL
- Windows security modification
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1080 -
C:\Windows\SysWOW64\schtasks.exe"schtasks" /create /tn "Venom Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
PID:1544
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C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1624 -
C:\Windows\SysWOW64\schtasks.exe"schtasks" /create /tn "Venom Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
PID:676
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"powershell" Get-MpPreference -verbose2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1740
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /k start /b del /q/f/s %TEMP%\* & exit2⤵
- Suspicious use of WriteProcessMemory
PID:1384 -
C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*3⤵PID:1640
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C:\Windows\SysWOW64\cmd.execmd /c ""C:\Users\Admin\AppData\Local\Temp\8XakQ7zvFHe0.bat" "2⤵
- Suspicious use of WriteProcessMemory
PID:1436 -
C:\Windows\SysWOW64\chcp.comchcp 650013⤵PID:824
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C:\Windows\SysWOW64\PING.EXEping -n 10 localhost3⤵
- Runs ping.exe
PID:1368
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C:\Users\Admin\AppData\Local\Temp\cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe"C:\Users\Admin\AppData\Local\Temp\cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc.exe"3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1744
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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MD5
55b3887f747b31dc67a15d2f10594db8
SHA1e4be96ba216111addde4ae87fcba639dced751ba
SHA2560d4ad9dcfe3755ac08cfa10880fadd8bd11804fe66c2dd6b135087c4c6d65e69
SHA51240e5ed3f644affdb04404ccb26572b070fb6180a6485fea250af96ad57e8f8256bd1c640cde63412cbe9936f0f17507ff0fa19db83b2017318b9a81311fd3222
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MD5
4ef1927705d28faf8456c200397d0af6
SHA1b92ab805e7c2884abcf371179b0d8989c4f90025
SHA256cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc
SHA512fe7f2405a8beb2bd70cfc689ce5ea3fc2cc4e03c72c925db698ea0e56b269b3e66c20f88afc382ea734e39b25cf66b0bcf24d72dab12d1b791ef91c690af17ac
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MD5
4ef1927705d28faf8456c200397d0af6
SHA1b92ab805e7c2884abcf371179b0d8989c4f90025
SHA256cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc
SHA512fe7f2405a8beb2bd70cfc689ce5ea3fc2cc4e03c72c925db698ea0e56b269b3e66c20f88afc382ea734e39b25cf66b0bcf24d72dab12d1b791ef91c690af17ac
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MD5
4ef1927705d28faf8456c200397d0af6
SHA1b92ab805e7c2884abcf371179b0d8989c4f90025
SHA256cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc
SHA512fe7f2405a8beb2bd70cfc689ce5ea3fc2cc4e03c72c925db698ea0e56b269b3e66c20f88afc382ea734e39b25cf66b0bcf24d72dab12d1b791ef91c690af17ac