9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030

General

Target

9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030.exe
Size

34KB
MD5

42e1fa5eef01a0c236527af51dbc1463
SHA1

9b0010ed028835966b3be5fa65f5d159042488d8
SHA256

9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030
SHA512

54dec7282b84b147904833b3cebe5d3045d336fb385f8a7958c3fb8d1980193465e21a9cea43723941f22af4e87389259c414cdf5dc25bce7ada4b764716f0d2
SSDEEP

768:8n0T6I8fCpcEMXxqEPORL9uFYcFd1d31klS7:80+IywoqB+Cc9dt7

Score

10^/10

evasion persistence upx

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

Processes:

9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\system32\\userinit.exe,C:\\Users\\Admin\\AppData\\Roaming\\csrss.exe"	9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030.exe

Adds policy Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\csrss = "C:\\Users\\Admin\\AppData\\Roaming\\csrss.exe"	9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\csrss = "C:\\Users\\Admin\\AppData\\Roaming\\csrss.exe"	9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030.exe

Executes dropped EXE 1 IoCs

Processes:

csrss.exe

pid process

956 csrss.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

1720 netsh.exe

pid	process
956	csrss.exe

pid	process
1720	netsh.exe

UPX packed file 7 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
\Users\Admin\AppData\Roaming\csrss.exe	upx
\Users\Admin\AppData\Roaming\csrss.exe	upx
C:\Users\Admin\AppData\Roaming\csrss.exe	upx
behavioral1/memory/580-65-0x0000000000400000-0x0000000000424000-memory.dmp	upx
behavioral1/memory/956-67-0x0000000000400000-0x0000000000424000-memory.dmp	upx
behavioral1/memory/956-69-0x0000000000400000-0x0000000000424000-memory.dmp	upx
behavioral1/memory/956-70-0x0000000000400000-0x0000000000424000-memory.dmp	upx

Loads dropped DLL 2 IoCs

Processes:

9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030.exe

pid	process
580	9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030.exe
580	9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\csrss = "C:\\Users\\Admin\\AppData\\Roaming\\csrss.exe"	9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run	9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\csrss = "C:\\Users\\Admin\\AppData\\Roaming\\csrss.exe"	9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run	9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030.execsrss.exe

pid process

580 9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030.exe
956 csrss.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030.exe

description	pid	process	target process
PID 580 wrote to memory of 1720	580	9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030.exe	netsh.exe
PID 580 wrote to memory of 1720	580	9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030.exe	netsh.exe
PID 580 wrote to memory of 1720	580	9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030.exe	netsh.exe
PID 580 wrote to memory of 1720	580	9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030.exe	netsh.exe
PID 580 wrote to memory of 956	580	9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030.exe	csrss.exe
PID 580 wrote to memory of 956	580	9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030.exe	csrss.exe
PID 580 wrote to memory of 956	580	9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030.exe	csrss.exe
PID 580 wrote to memory of 956	580	9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030.exe	csrss.exe

C:\Users\Admin\AppData\Local\Temp\9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030.exe
"C:\Users\Admin\AppData\Local\Temp\9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030.exe"
1⤵
- Modifies WinLogon for persistence
- Adds policy Run key to start application
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:580

C:\Windows\SysWOW64\netsh.exe
netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\csrss.exe" CityScape Enable
2⤵
- Modifies Windows Firewall
PID:1720

C:\Users\Admin\AppData\Roaming\csrss.exe
C:\Users\Admin\AppData\Local\Temp\9e56f8d07e5c62eeacf8f9be0a215748ce66d529f6c1344355674f8d57fe6030.exe
2⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:956

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Registry Run Keys / Startup Folder

2

T1060

Modify Existing Service

1

T1031

Privilege Escalation

Defense Evasion

Modify Registry

3

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\csrss.exe
Filesize
34KB

MD5
3546fd7238a2696aaa25135abcf4b899

SHA1
5da4d356f2863063d43847aef97c40e042e594ff

SHA256
eb40ebc292c557bb948da4b9274bf21c6015d45e91a8f9dd0e4c34735738f651

SHA512
065817e262550402353acb64922b67016a7ee97cb68a1b0a0c54f6aaf877f70d45b709f39e8da27677e0fdfa610038c053631d58263d83477d924a6c3334961f

Download Submit
\Users\Admin\AppData\Roaming\csrss.exe
Filesize
34KB

MD5
3546fd7238a2696aaa25135abcf4b899

SHA1
5da4d356f2863063d43847aef97c40e042e594ff

SHA256
eb40ebc292c557bb948da4b9274bf21c6015d45e91a8f9dd0e4c34735738f651

SHA512
065817e262550402353acb64922b67016a7ee97cb68a1b0a0c54f6aaf877f70d45b709f39e8da27677e0fdfa610038c053631d58263d83477d924a6c3334961f

Download Submit
\Users\Admin\AppData\Roaming\csrss.exe
Filesize
34KB

MD5
3546fd7238a2696aaa25135abcf4b899

SHA1
5da4d356f2863063d43847aef97c40e042e594ff

SHA256
eb40ebc292c557bb948da4b9274bf21c6015d45e91a8f9dd0e4c34735738f651

SHA512
065817e262550402353acb64922b67016a7ee97cb68a1b0a0c54f6aaf877f70d45b709f39e8da27677e0fdfa610038c053631d58263d83477d924a6c3334961f

Download Submit
memory/580-56-0x0000000075931000-0x0000000075933000-memory.dmp

Filesize
8KB

Download
memory/580-65-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/580-66-0x00000000002B0000-0x00000000002D4000-memory.dmp

Filesize
144KB

Download
memory/956-60-0x0000000000000000-mapping.dmp

Download
memory/956-67-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/956-69-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/956-70-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1720-57-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads