cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047

General

Target

cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047.exe
Size

132KB
MD5

2b20a6936da978e4ed5cb14589689151
SHA1

aab10f79f884342508e27db4556fe11e60cc59e3
SHA256

cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047
SHA512

0e2ab16e83084c44e4f0248039bd66be8f2b3310eb091eb39e4177c61eac3a0b6f00b619e5d30626516a0c33b91eb329b3554cce86a30aad624f688ede914a0a
SSDEEP

1536:jvJjYfQoomlMvYf8LtpfKUACQIENnSwHC4QxCIrOiotb2t:DKfQ9bQIe9C3xCIrmtb2t

Score

10^/10

evasion persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

Processes:

cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047.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\\Microsoft\\csrss.exe"	cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047.exe

Adds policy Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\csrss = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\csrss.exe"	cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047.exe
Key created	\REGISTRY\USER\S-1-5-21-575491160-2295418218-1540667289-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-575491160-2295418218-1540667289-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\csrss = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\csrss.exe"	cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047.exe

Executes dropped EXE 1 IoCs

Processes:

csrss.exe

pid process

1532 csrss.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

340 netsh.exe

pid	process
1532	csrss.exe

pid	process
340	netsh.exe

Loads dropped DLL 2 IoCs

Processes:

cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047.exe

pid	process
612	cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047.exe
612	cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-575491160-2295418218-1540667289-1000\Software\Microsoft\Windows\CurrentVersion\Run\csrss = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\csrss.exe"	cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run	cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\csrss = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\csrss.exe"	cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047.exe
Key created	\REGISTRY\USER\S-1-5-21-575491160-2295418218-1540667289-1000\Software\Microsoft\Windows\CurrentVersion\Run	cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047.exe

Modifies system certificate store 2 TTPs 4 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

Processes:

csrss.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D4DE20D05E66FC53FE1A50882C78DB2852CAE474	csrss.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D4DE20D05E66FC53FE1A50882C78DB2852CAE474\Blob = 0f0000000100000014000000ce0e658aa3e847e467a147b3049191093d055e6f0b0000000100000034000000420061006c00740069006d006f007200650020004300790062006500720054007200750073007400200052006f006f007400000053000000010000002400000030223020060a2b06010401b13e01640130123010060a2b0601040182373c0101030200c0140000000100000014000000e59d5930824758ccacfa085436867b3ab5044df01d0000000100000010000000918ad43a9475f78bb5243de886d8103c09000000010000000c000000300a06082b06010505070301030000000100000014000000d4de20d05e66fc53fe1a50882c78db2852cae47420000000010000007b030000308203773082025fa0030201020204020000b9300d06092a864886f70d0101050500305a310b300906035504061302494531123010060355040a130942616c74696d6f726531133011060355040b130a43796265725472757374312230200603550403131942616c74696d6f7265204379626572547275737420526f6f74301e170d3030303531323138343630305a170d3235303531323233353930305a305a310b300906035504061302494531123010060355040a130942616c74696d6f726531133011060355040b130a43796265725472757374312230200603550403131942616c74696d6f7265204379626572547275737420526f6f7430820122300d06092a864886f70d01010105000382010f003082010a0282010100a304bb22ab983d57e826729ab579d429e2e1e89580b1b0e35b8e2b299a64dfa15dedb009056ddb282ece62a262feb488da12eb38eb219dc0412b01527b8877d31c8fc7bab988b56a09e773e81140a7d1ccca628d2de58f0ba650d2a850c328eaf5ab25878a9a961ca967b83f0cd5f7f952132fc21bd57070f08fc012ca06cb9ae1d9ca337a77d6f8ecb9f16844424813d2c0c2a4ae5e60feb6a605fcb4dd075902d459189863f5a563e0900c7d5db2067af385eaebd403ae5e843e5fff15ed69bcf939367275cf77524df3c9902cb93de5c923533f1f2498215c079929bdc63aece76e863a6b97746333bd681831f0788d76bffc9e8e5d2a86a74d90dc271a390203010001a3453043301d0603551d0e04160414e59d5930824758ccacfa085436867b3ab5044df030120603551d130101ff040830060101ff020103300e0603551d0f0101ff040403020106300d06092a864886f70d01010505000382010100850c5d8ee46f51684205a0ddbb4f27258403bdf764fd2dd730e3a41017ebda2929b6793f76f6191323b8100af958a4d46170bd04616a128a17d50abdc5bc307cd6e90c258d86404feccca37e38c637114feddd68318e4cd2b30174eebe755e07481a7f70ff165c84c07985b805fd7fbe6511a30fc002b4f852373904d5a9317a18bfa02af41299f7a34582e33c5ef59d9eb5c89e7c2ec8a49e4e08144b6dfd706d6b1a63bd64e61fb7cef0f29f2ebb1bb7f250887392c2e2e3168d9a3202ab8e18dde91011ee7e35ab90af3e30947ad0333da7650ff5fc8e9e62cf47442c015dbb1db532d247d2382ed0fe81dc326a1eb5ee3cd5fce7811d19c32442ea6339a9	csrss.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D4DE20D05E66FC53FE1A50882C78DB2852CAE474\Blob = 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	csrss.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D4DE20D05E66FC53FE1A50882C78DB2852CAE474\Blob = 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	csrss.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047.execsrss.exe

pid process

612 cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047.exe
1532 csrss.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047.exe

description	pid	process	target process
PID 612 wrote to memory of 340	612	cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047.exe	netsh.exe
PID 612 wrote to memory of 340	612	cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047.exe	netsh.exe
PID 612 wrote to memory of 340	612	cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047.exe	netsh.exe
PID 612 wrote to memory of 340	612	cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047.exe	netsh.exe
PID 612 wrote to memory of 1532	612	cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047.exe	csrss.exe
PID 612 wrote to memory of 1532	612	cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047.exe	csrss.exe
PID 612 wrote to memory of 1532	612	cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047.exe	csrss.exe
PID 612 wrote to memory of 1532	612	cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047.exe	csrss.exe

C:\Users\Admin\AppData\Local\Temp\cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047.exe
"C:\Users\Admin\AppData\Local\Temp\cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047.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:612

C:\Windows\SysWOW64\netsh.exe
netsh advfirewall firewall add rule name="Nero" dir=in action=allow description="Multimedia suite" program="C:\Users\Admin\AppData\Roaming\Microsoft\csrss.exe" enable=yes
2⤵
- Modifies Windows Firewall
PID:340

C:\Users\Admin\AppData\Roaming\Microsoft\csrss.exe
C:\Users\Admin\AppData\Local\Temp\cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047.exe
2⤵
- Executes dropped EXE
- Modifies system certificate store
- Suspicious use of SetWindowsHookEx
PID:1532

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

4

T1112

Install Root Certificate

1

T1130

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\csrss.exe
Filesize
132KB

MD5
2b20a6936da978e4ed5cb14589689151

SHA1
aab10f79f884342508e27db4556fe11e60cc59e3

SHA256
cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047

SHA512
0e2ab16e83084c44e4f0248039bd66be8f2b3310eb091eb39e4177c61eac3a0b6f00b619e5d30626516a0c33b91eb329b3554cce86a30aad624f688ede914a0a

Download Submit
\Users\Admin\AppData\Roaming\Microsoft\csrss.exe
Filesize
132KB

MD5
2b20a6936da978e4ed5cb14589689151

SHA1
aab10f79f884342508e27db4556fe11e60cc59e3

SHA256
cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047

SHA512
0e2ab16e83084c44e4f0248039bd66be8f2b3310eb091eb39e4177c61eac3a0b6f00b619e5d30626516a0c33b91eb329b3554cce86a30aad624f688ede914a0a

Download Submit
\Users\Admin\AppData\Roaming\Microsoft\csrss.exe
Filesize
132KB

MD5
2b20a6936da978e4ed5cb14589689151

SHA1
aab10f79f884342508e27db4556fe11e60cc59e3

SHA256
cc31fcfe935ea7374ca4a86783a47f77d7e6c6d840fb11789a9ff6ba665f9047

SHA512
0e2ab16e83084c44e4f0248039bd66be8f2b3310eb091eb39e4177c61eac3a0b6f00b619e5d30626516a0c33b91eb329b3554cce86a30aad624f688ede914a0a

Download Submit
memory/340-56-0x0000000000000000-mapping.dmp

Download
memory/612-57-0x0000000076161000-0x0000000076163000-memory.dmp

Filesize
8KB

Download
memory/1532-60-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads