Analysis
- max time kernel
150s - max time network
148s - platform
windows10-2004_x64 - resource
win10v2004-20260911-en - resource tags
arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows - submitted
14/10/2026, 12:36
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
d3a6bb2e83f4c58a4ed5fcb512a8e7e1fe5a65b6fd1888454b054ce83b78a23a.dll
Resource
win10v2004-20260911-en
windows10-2004-x64
17 signatures
150 seconds
Behavioral task
behavioral2
Sample
d3a6bb2e83f4c58a4ed5fcb512a8e7e1fe5a65b6fd1888454b054ce83b78a23a.dll
Resource
win11ltsc2024-20260911-en
windows11-ltsc_2024-x64
18 signatures
150 seconds
General
- Target d3a6bb2e83f4c58a4ed5fcb512a8e7e1fe5a65b6fd1888454b054ce83b78a23a.dll
- Size 5.8MB
- Sample261014-ps5aps119k
- SHA256 d3a6bb2e83f4c58a4ed5fcb512a8e7e1fe5a65b6fd1888454b054ce83b78a23a
- MD5 9aeb45c74d46d85c1db68a9e925fc679
- SHA1 438d474bc707f783f0731e3236432f1186f0ee47
- SHA512 5699ccf5554ef207bfd33348c9c0bc72810bc74b2abbe72b3d74886d5515e06c64ecdcc4c374c7f30010ff8975406e4885f900ca9716cadcdadc932fedb58f2e
- SSDEEP 98304:djBty0g5LwR3Xv7lfl4K6z0ShZaLQ2RC6cwmU3E1my7N0OF:djBtnvBz4hZgQ2oiFuD7
- TLSH T11156CF577AF840BAC8A3C179C66B8A9FE3F274110D31961F9295474A6F37B61CE0B321
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Signatures
- Family: ValleyRat
ValleyRat stage2 is a backdoor written in C++.
- Detects ValleyRAT payload 7 IoCs
resource yara_rule behavioral1/memory/2784-0-0x0000022ACA9F0000-0x0000022ACAA59000-memory.dmp family_valleyrat_stage_2_v2 behavioral1/memory/2784-2-0x0000022ACAB70000-0x0000022ACABE0000-memory.dmp family_valleyrat_stage_2_v2 behavioral1/memory/2784-5-0x0000022ACAB70000-0x0000022ACABE0000-memory.dmp family_valleyrat_stage_2_v2 behavioral1/memory/2784-1-0x0000022ACAB70000-0x0000022ACABE0000-memory.dmp family_valleyrat_stage_2_v2 behavioral1/memory/2784-6-0x0000022ACAB70000-0x0000022ACABE0000-memory.dmp family_valleyrat_stage_2_v2 behavioral1/memory/2784-7-0x0000022ACAB70000-0x0000022ACABE0000-memory.dmp family_valleyrat_stage_2_v2 behavioral1/memory/2784-20-0x0000022ACAB70000-0x0000022ACABE0000-memory.dmp family_valleyrat_stage_2_v2 - Badlisted process makes network request 5 IoCs
Network request originating from process or tool commonly abused by malware.
flow pid Process 25 2784 rundll32.exe 26 2784 rundll32.exe 28 2784 rundll32.exe 30 2784 rundll32.exe 32 2784 rundll32.exe - Executes dropped EXE 1 IoCs
pid Process 4528 rundll32.exe - Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Enumerates connected drives 3 TTPs 22 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
description ioc Process File opened (read-only) \??\Q: rundll32.exe File opened (read-only) \??\Y: rundll32.exe File opened (read-only) \??\Z: rundll32.exe File opened (read-only) \??\E: rundll32.exe File opened (read-only) \??\N: rundll32.exe File opened (read-only) \??\X: rundll32.exe File opened (read-only) \??\G: rundll32.exe File opened (read-only) \??\I: rundll32.exe File opened (read-only) \??\K: rundll32.exe File opened (read-only) \??\O: rundll32.exe File opened (read-only) \??\V: rundll32.exe File opened (read-only) \??\W: rundll32.exe File opened (read-only) \??\H: rundll32.exe File opened (read-only) \??\J: rundll32.exe File opened (read-only) \??\M: rundll32.exe File opened (read-only) \??\P: rundll32.exe File opened (read-only) \??\R: rundll32.exe File opened (read-only) \??\S: rundll32.exe File opened (read-only) \??\T: rundll32.exe File opened (read-only) \??\U: rundll32.exe File opened (read-only) \??\B: rundll32.exe File opened (read-only) \??\L: rundll32.exe - Looks up external IP address via web service 1 TTPs 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 27 api.ipify.org 28 api.ipify.org 31 ip-api.com - Drops file in System32 directory 2 IoCs
description ioc Process File opened for modification C:\Windows\system32\rundll32.exe rundll32.exe File opened for modification C:\Windows\system32\CRcLiENt.dll rundll32.exe - Executes a command shell one-liner 1 TTPs 1 IoCs
Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.
pid Process 1588 cmd.exe - Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs
The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.
description ioc Process Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname rundll32.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain rundll32.exe - Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe 2784 rundll32.exe - Suspicious use of AdjustPrivilegeToken 40 IoCs
description pid Process Token: SeDebugPrivilege 2784 rundll32.exe Token: SeLoadDriverPrivilege 2784 rundll32.exe Token: SeTakeOwnershipPrivilege 2784 rundll32.exe Token: SeIncBasePriorityPrivilege 2784 rundll32.exe Token: SeTcbPrivilege 2784 rundll32.exe Token: SeDebugPrivilege 2784 rundll32.exe Token: SeCreateTokenPrivilege 2784 rundll32.exe Token: SeAssignPrimaryTokenPrivilege 2784 rundll32.exe Token: SeLockMemoryPrivilege 2784 rundll32.exe Token: SeIncreaseQuotaPrivilege 2784 rundll32.exe Token: SeMachineAccountPrivilege 2784 rundll32.exe Token: SeTcbPrivilege 2784 rundll32.exe Token: SeSecurityPrivilege 2784 rundll32.exe Token: SeTakeOwnershipPrivilege 2784 rundll32.exe Token: SeLoadDriverPrivilege 2784 rundll32.exe Token: SeSystemProfilePrivilege 2784 rundll32.exe Token: SeSystemtimePrivilege 2784 rundll32.exe Token: SeProfSingleProcessPrivilege 2784 rundll32.exe Token: SeIncBasePriorityPrivilege 2784 rundll32.exe Token: SeCreatePagefilePrivilege 2784 rundll32.exe Token: SeCreatePermanentPrivilege 2784 rundll32.exe Token: SeBackupPrivilege 2784 rundll32.exe Token: SeRestorePrivilege 2784 rundll32.exe Token: SeShutdownPrivilege 2784 rundll32.exe Token: SeDebugPrivilege 2784 rundll32.exe Token: SeAuditPrivilege 2784 rundll32.exe Token: SeSystemEnvironmentPrivilege 2784 rundll32.exe Token: SeChangeNotifyPrivilege 2784 rundll32.exe Token: SeRemoteShutdownPrivilege 2784 rundll32.exe Token: SeUndockPrivilege 2784 rundll32.exe Token: SeSyncAgentPrivilege 2784 rundll32.exe Token: SeEnableDelegationPrivilege 2784 rundll32.exe Token: SeManageVolumePrivilege 2784 rundll32.exe Token: SeImpersonatePrivilege 2784 rundll32.exe Token: SeCreateGlobalPrivilege 2784 rundll32.exe Token: 31 2784 rundll32.exe Token: 32 2784 rundll32.exe Token: 33 2784 rundll32.exe Token: 34 2784 rundll32.exe Token: 35 2784 rundll32.exe - Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 2784 rundll32.exe - Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 2784 wrote to memory of 1588 2784 rundll32.exe 97 PID 1588 wrote to memory of 892 1588 cmd.exe 98 - Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
- Uses Volume Shadow Copy WMI provider
The Volume Shadow Copy service is used to manage backups/snapshots.
- Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
-
C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\d3a6bb2e83f4c58a4ed5fcb512a8e7e1fe5a65b6fd1888454b054ce83b78a23a.dll,#11⤵
- Badlisted process makes network request
- Enumerates connected drives
- Drops file in System32 directory
- Reads the TCP/IP host and domain name from the registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2784 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /c start "" "C:\Windows\System32\rundll32.exe" "C:\Windows\system32\CRCLIENT.dll",vmnetDHCP "C:\Windows\system32\rundll32.exe"2⤵
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
PID:1588 -
C:\Windows\System32\rundll32.exe"C:\Windows\System32\rundll32.exe" "C:\Windows\system32\CRCLIENT.dll",vmnetDHCP "C:\Windows\system32\rundll32.exe"3⤵PID:892
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C:\Windows\system32\rundll32.exeC:\Windows\system32\rundll32.exe1⤵
- Executes dropped EXE
PID:4528
Network
MITRE ATT&CK Enterprise v16
Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
1Credentials In Files
1Replay Monitor
Loading Replay Monitor...
Downloads
- Path C:\Windows\System32\rundll32.exe
- Size 70KB
- SHA256 b53f3c0cd32d7f20849850768da6431e5f876b7bfa61db0aa0700b02873393fa
- MD5 ef3179d498793bf4234f708d3be28633
- SHA1 dd399ae46303343f9f0da189aee11c67bd868222
- SHA512 02aff154762d7e53e37754f878ce6aa3f4df5a1eb167e27f13d9762dced32bec892bfa3f3314e3c6dce5998f7d3c400d7d0314b9326eedcab72207c60b3d332e
- SSDEEP 1536:J8qpnO/qRUNReI3fu6Uw2mTARPw2cm+YRQln5IUmDjoX:C/YUNRBfukTreXRQln5I
- TLSH T16B630BC9A66460F4E077953444734E099272BC22D7625ADF54F0F17C0FF36E0A93AAAB
- MD5 SHA1 SHA512 SSDEEP TLSH