Resubmissions
18-01-2021 13:44
210118-tnaye7c7rn 1017-01-2021 17:18
210117-bjwdekjbns 1003-01-2021 10:03
210103-jfxpahl1la 10Analysis
-
max time kernel
142s -
max time network
139s -
platform
windows7_x64 -
resource
win7v20201028 -
submitted
03-01-2021 10:03
Static task
static1
Behavioral task
behavioral1
Sample
7P7DYQVc.exe
Resource
win7v20201028
Behavioral task
behavioral2
Sample
7P7DYQVc.exe
Resource
win10v20201028
Errors
General
-
Target
7P7DYQVc.exe
-
Size
23KB
-
MD5
d350b0d6462773a8f98d60ec7ca993fe
-
SHA1
a8eced99a403074fd6be13a579df9a35acb7acf9
-
SHA256
0e798055549a18d74a4c26621e5925883c55a33f2be16cb4b79eeefd40c9dd0c
-
SHA512
4105c6a027a7e9b89f08cc635ea6cefab8f3c270b9ddb7915ef0232084cad96a1df3b328f97be653f7d5ccaa457396450d2189269ddf9379b24c5b182ca9e567
Malware Config
Signatures
-
Executes dropped EXE 1 IoCs
Processes:
csrss.exepid process 880 csrss.exe -
Modifies Windows Firewall 1 TTPs
-
Drops startup file 2 IoCs
Processes:
csrss.exedescription ioc process File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bd8a83ed8b02d3c995a02f159f9c2953.exe csrss.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bd8a83ed8b02d3c995a02f159f9c2953.exe csrss.exe -
Loads dropped DLL 1 IoCs
Processes:
7P7DYQVc.exepid process 1640 7P7DYQVc.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
csrss.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\bd8a83ed8b02d3c995a02f159f9c2953 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\csrss.exe\" .." csrss.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\bd8a83ed8b02d3c995a02f159f9c2953 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\csrss.exe\" .." csrss.exe -
Suspicious use of AdjustPrivilegeToken 29 IoCs
Processes:
csrss.exedescription pid process Token: SeDebugPrivilege 880 csrss.exe Token: 33 880 csrss.exe Token: SeIncBasePriorityPrivilege 880 csrss.exe Token: 33 880 csrss.exe Token: SeIncBasePriorityPrivilege 880 csrss.exe Token: 33 880 csrss.exe Token: SeIncBasePriorityPrivilege 880 csrss.exe Token: 33 880 csrss.exe Token: SeIncBasePriorityPrivilege 880 csrss.exe Token: 33 880 csrss.exe Token: SeIncBasePriorityPrivilege 880 csrss.exe Token: 33 880 csrss.exe Token: SeIncBasePriorityPrivilege 880 csrss.exe Token: 33 880 csrss.exe Token: SeIncBasePriorityPrivilege 880 csrss.exe Token: 33 880 csrss.exe Token: SeIncBasePriorityPrivilege 880 csrss.exe Token: 33 880 csrss.exe Token: SeIncBasePriorityPrivilege 880 csrss.exe Token: 33 880 csrss.exe Token: SeIncBasePriorityPrivilege 880 csrss.exe Token: 33 880 csrss.exe Token: SeIncBasePriorityPrivilege 880 csrss.exe Token: 33 880 csrss.exe Token: SeIncBasePriorityPrivilege 880 csrss.exe Token: 33 880 csrss.exe Token: SeIncBasePriorityPrivilege 880 csrss.exe Token: 33 880 csrss.exe Token: SeIncBasePriorityPrivilege 880 csrss.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
7P7DYQVc.execsrss.exedescription pid process target process PID 1640 wrote to memory of 880 1640 7P7DYQVc.exe csrss.exe PID 1640 wrote to memory of 880 1640 7P7DYQVc.exe csrss.exe PID 1640 wrote to memory of 880 1640 7P7DYQVc.exe csrss.exe PID 1640 wrote to memory of 880 1640 7P7DYQVc.exe csrss.exe PID 880 wrote to memory of 1612 880 csrss.exe netsh.exe PID 880 wrote to memory of 1612 880 csrss.exe netsh.exe PID 880 wrote to memory of 1612 880 csrss.exe netsh.exe PID 880 wrote to memory of 1612 880 csrss.exe netsh.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\7P7DYQVc.exe"C:\Users\Admin\AppData\Local\Temp\7P7DYQVc.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\csrss.exe"C:\Users\Admin\AppData\Local\Temp\csrss.exe"2⤵
- Executes dropped EXE
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\netsh.exenetsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\csrss.exe" "csrss.exe" ENABLE3⤵
-
C:\Windows\system32\LogonUI.exe"LogonUI.exe" /flags:0x01⤵
-
C:\Windows\system32\LogonUI.exe"LogonUI.exe" /flags:0x11⤵
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
-
C:\Users\Admin\AppData\Local\Temp\csrss.exeMD5
d350b0d6462773a8f98d60ec7ca993fe
SHA1a8eced99a403074fd6be13a579df9a35acb7acf9
SHA2560e798055549a18d74a4c26621e5925883c55a33f2be16cb4b79eeefd40c9dd0c
SHA5124105c6a027a7e9b89f08cc635ea6cefab8f3c270b9ddb7915ef0232084cad96a1df3b328f97be653f7d5ccaa457396450d2189269ddf9379b24c5b182ca9e567
-
C:\Users\Admin\AppData\Local\Temp\csrss.exeMD5
d350b0d6462773a8f98d60ec7ca993fe
SHA1a8eced99a403074fd6be13a579df9a35acb7acf9
SHA2560e798055549a18d74a4c26621e5925883c55a33f2be16cb4b79eeefd40c9dd0c
SHA5124105c6a027a7e9b89f08cc635ea6cefab8f3c270b9ddb7915ef0232084cad96a1df3b328f97be653f7d5ccaa457396450d2189269ddf9379b24c5b182ca9e567
-
\Users\Admin\AppData\Local\Temp\csrss.exeMD5
d350b0d6462773a8f98d60ec7ca993fe
SHA1a8eced99a403074fd6be13a579df9a35acb7acf9
SHA2560e798055549a18d74a4c26621e5925883c55a33f2be16cb4b79eeefd40c9dd0c
SHA5124105c6a027a7e9b89f08cc635ea6cefab8f3c270b9ddb7915ef0232084cad96a1df3b328f97be653f7d5ccaa457396450d2189269ddf9379b24c5b182ca9e567
-
memory/880-3-0x0000000000000000-mapping.dmp
-
memory/1612-6-0x0000000000000000-mapping.dmp