ScreenShot
| Created | 2021.11.14 18:36 | Machine | s1_win7_x6401 |
| Filename | Grindstone.exe | ||
| Type | PE32 executable (console) Intel 80386 Mono/.Net assembly, for MS Windows | ||
| AI Score |
|
Behavior Score |
|
| ZERO API | file : clean | ||
| VT API (file) | 32 detected (malicious, high confidence, GenericKDZ, GenericRXQO, ZemsilF, Tm0@aGu4Rkj, Kryptik, Eldorado, Attribute, HighConfidence, Convagent, PWSX, PackedNET, Static AI, Malicious PE, Unsafe, Score, 100%, AGEN, AgentTesla, ai score=84, susgen) | ||
| md5 | 7e400451e3153f07e15e9079b8bed063 | ||
| sha256 | 7ba90aa0c59065b2cff53772013ce986674346b311025c13eefff32670d7ffe1 | ||
| ssdeep | 12288:XSQv1aMdRads3zLsAPlA1a5eEc634hhHSR1BtC0BvXpOB0/ENm2GrggqABm1Fk3A:CQdnRnWUc634Xa1rfBfpOB0/ENm2GrgD | ||
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 | ||
| impfuzzy | 3:rGsLdAIEK:tf | ||
Network IP location
Signature (34cnts)
| Level | Description |
|---|---|
| danger | Executed a process and injected code into it |
| danger | File has been identified by 32 AntiVirus engines on VirusTotal as malicious |
| watch | Allocates execute permission to another process indicative of possible code injection |
| watch | Attempts to access Bitcoin/ALTCoin wallets |
| watch | Checks the CPU name from registry |
| watch | Code injection by writing an executable or DLL to the memory of another process |
| watch | Collects information about installed applications |
| watch | Harvests credentials from local email clients |
| watch | Potential code injection by writing to the memory of another process |
| watch | Resumed a suspended thread in a remote process potentially indicative of process injection |
| watch | Used NtSetContextThread to modify a thread in a remote process indicative of process injection |
| notice | A process created a hidden window |
| notice | Allocates read-write-execute memory (usually to unpack itself) |
| notice | An executable file was downloaded by the process grindstone.exe |
| notice | Checks for the Locally Unique Identifier on the system for a suspicious privilege |
| notice | Creates a suspicious process |
| notice | Creates executable files on the filesystem |
| notice | Drops an executable to the user AppData folder |
| notice | Executes one or more WMI queries |
| notice | HTTP traffic contains suspicious features which may be indicative of malware related traffic |
| notice | One or more potentially interesting buffers were extracted |
| notice | Performs some HTTP requests |
| notice | Queries for potentially installed applications |
| notice | Sends data using the HTTP POST Method |
| notice | Steals private information from local Internet browsers |
| notice | Uses Windows utilities for basic Windows functionality |
| notice | Yara rule detected in process memory |
| info | Checks amount of memory in system |
| info | Checks if process is being debugged by a debugger |
| info | Collects information to fingerprint the system (MachineGuid |
| info | Command line console output was observed |
| info | Queries for the computername |
| info | Tries to locate where the browsers are installed |
| info | Uses Windows APIs to generate a cryptographic key |
Rules (25cnts)
| Level | Name | Description | Collection |
|---|---|---|---|
| danger | Win32_Trojan_Gen_1_0904B0_Zero | Win32 Trojan Emotet | binaries (download) |
| warning | Generic_Malware_Zero | Generic Malware | binaries (download) |
| warning | Generic_Malware_Zero | Generic Malware | binaries (upload) |
| watch | Malicious_Library_Zero | Malicious_Library | binaries (download) |
| watch | Malicious_Packer_Zero | Malicious Packer | binaries (download) |
| watch | UPX_Zero | UPX packed file | binaries (download) |
| info | anti_dbg | Checks if being debugged | memory |
| info | DebuggerCheck__GlobalFlags | (no description) | memory |
| info | DebuggerCheck__QueryInfo | (no description) | memory |
| info | DebuggerHiding__Active | (no description) | memory |
| info | DebuggerHiding__Thread | (no description) | memory |
| info | disable_dep | Bypass DEP | memory |
| info | Is_DotNET_EXE | (no description) | binaries (download) |
| info | Is_DotNET_EXE | (no description) | binaries (upload) |
| info | IsDLL | (no description) | binaries (download) |
| info | IsPE32 | (no description) | binaries (download) |
| info | IsPE32 | (no description) | binaries (upload) |
| info | JPEG_Format_Zero | JPEG Format | binaries (download) |
| info | OS_Processor_Check_Zero | OS Processor Check | binaries (download) |
| info | PE_Header_Zero | PE File Signature | binaries (download) |
| info | PE_Header_Zero | PE File Signature | binaries (upload) |
| info | SEH__vectored | (no description) | memory |
| info | ThreadControl__Context | (no description) | memory |
| info | Win_Backdoor_AsyncRAT_Zero | Win Backdoor AsyncRAT | binaries (download) |
| info | Win_Backdoor_AsyncRAT_Zero | Win Backdoor AsyncRAT | binaries (upload) |
Network (11cnts) ?
Suricata ids
ET INFO Observed DNS Query to .biz TLD
ET POLICY Data POST to an image file (jpg)
ET HUNTING Suspicious EXE Download Content-Type image/jpeg
ET HUNTING Possible EXE Download From Suspicious TLD
ET HUNTING Suspicious Zipped Filename in Outbound POST Request (screenshot.) M2
ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil
ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)
ET HUNTING Suspicious Zipped Filename in Outbound POST Request (Chrome_Default.txt)
ET POLICY Data POST to an image file (jpg)
ET HUNTING Suspicious EXE Download Content-Type image/jpeg
ET HUNTING Possible EXE Download From Suspicious TLD
ET HUNTING Suspicious Zipped Filename in Outbound POST Request (screenshot.) M2
ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil
ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)
ET HUNTING Suspicious Zipped Filename in Outbound POST Request (Chrome_Default.txt)
PE API
IAT(Import Address Table) Library
mscoree.dll
0x402000 _CorExeMain
EAT(Export Address Table) is none
mscoree.dll
0x402000 _CorExeMain
EAT(Export Address Table) is none