Summary | ZeroBOX

Category	Machine	Started	Completed
FILE	s1_win7_x6403_us	May 23, 2022, 5:57 p.m.	May 23, 2022, 5:59 p.m.

Size	594.5KB
Type	PE32+ executable (DLL) (GUI) x86-64, for MS Windows
MD5	`8d3fb91703422f1dc70f8afa09753c64`
SHA256	`5a1f914bdc047b4042b507d0fff30edb69f845b2932d8a166485c37f1c88b152`
CRC32	`00E9FCA2`
ssdeep	`12288:ox+1xXChgHGuLRh++7XfxTIq2J0Rzgi/3J:ox+zn/R8qXfx1RH`
Yara	IsDLL - (no description) Malicious_Packer_Zero - Malicious Packer Malicious_Library_Zero - Malicious_Library PE_Header_Zero - PE File Signature IsPE64 - (no description)

rundll32.exe "C:\Windows\System32\rundll32.exe" C:\Users\test22\AppData\Local\Temp\9boJQZpTSdQE.dll,
2412
rundll32.exe "C:\Windows\System32\rundll32.exe" C:\Users\test22\AppData\Local\Temp\9boJQZpTSdQE.dll,DllRegisterServer
2312
- rundll32.exe "C:\Windows\System32\rundll32.exe" C:\Users\test22\AppData\Local\Temp\9boJQZpTSdQE.dll,DllRegisterServer
  2476
  - regsvr32.exe C:\Windows\system32\regsvr32.exe "C:\Windows\system32\ETBrbXAducFMc\DMoTfSjjFin.dll"
    3068
explorer.exe C:\Windows\Explorer.EXE
1236

Name	Response	Post-Analysis Lookup
No hosts contacted.

IP Address	Status	Action
No hosts contacted.

Suricata Alerts

No Suricata Alerts

Suricata TLS

No Suricata TLS

Checks if process is being debugged by a debugger (1 event)

Time & API	Arguments	Status	Return	Repeated
IsDebuggerPresent May 23, 2022, 5:58 p.m.			0	0

Allocates read-write-execute memory (usually to unpack itself) (8 events)

Time & API	Arguments	Status
NtAllocateVirtualMemory May 23, 2022, 5:57 p.m.	process_identifier: 2476 region_size: 4096 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x00000000003e0000 allocation_type: 12288 (MEM_COMMIT\|MEM_RESERVE) process_handle: 0xffffffffffffffff	1
NtAllocateVirtualMemory May 23, 2022, 5:58 p.m.	process_identifier: 2476 region_size: 192512 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x0000000001c20000 allocation_type: 12288 (MEM_COMMIT\|MEM_RESERVE) process_handle: 0xffffffffffffffff	1
NtAllocateVirtualMemory May 23, 2022, 5:59 p.m.	process_identifier: 1236 region_size: 65536 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x00000000064c0000 allocation_type: 4096 (MEM_COMMIT) process_handle: 0xffffffffffffffff	1
NtProtectVirtualMemory May 23, 2022, 5:58 p.m.	process_identifier: 3068 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 length: 4096 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x0000000180038000 process_handle: 0xffffffffffffffff	1
NtProtectVirtualMemory May 23, 2022, 5:58 p.m.	process_identifier: 3068 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 length: 4096 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x000007fefee30000 process_handle: 0xffffffffffffffff	1
NtProtectVirtualMemory May 23, 2022, 5:58 p.m.	process_identifier: 3068 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 length: 4096 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x000007fef7411000 process_handle: 0xffffffffffffffff	1
NtProtectVirtualMemory May 23, 2022, 5:58 p.m.	process_identifier: 3068 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 length: 4096 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x000007feff10d000 process_handle: 0xffffffffffffffff	1
NtAllocateVirtualMemory May 23, 2022, 5:58 p.m.	process_identifier: 3068 region_size: 4096 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x00000000005c0000 allocation_type: 12288 (MEM_COMMIT\|MEM_RESERVE) process_handle: 0xffffffffffffffff	1

Queries the disk size which could be used to detect virtual machine with small fixed size or dynamic allocation (1 event)

Time & API	Arguments	Status	Return	Repeated
GetDiskFreeSpaceExW May 23, 2022, 5:59 p.m.	total_number_of_free_bytes: 0 free_bytes_available: 10237140992 root_path: C:\Users\test22\AppData\Local\Microsoft\Windows\Explorer total_number_of_bytes: 0	1	1	0

Creates a suspicious process (1 event)

cmdline

C:\Windows\system32\regsvr32.exe "C:\Windows\system32\ETBrbXAducFMc\DMoTfSjjFin.dll"

The binary likely contains encrypted or compressed data indicative of a packer (2 events)

section

{u'size_of_data': u'0x00042e00', u'virtual_address': u'0x00057000', u'entropy': 7.082023869670153, u'name': u'.rsrc', u'virtual_size': u'0x00042dec'}

entropy

7.08202386967

description

A section with a high entropy has been found

entropy

0.450716090986

description

Overall entropy of this PE file is high

Installs itself for autorun at Windows startup (1 event)

service_name

DMoTfSjjFin.dll

service_path

C:\Windows\System32\regsvr32.exe "C:\Windows\system32\ETBrbXAducFMc\DMoTfSjjFin.dll"

Created a service where a service was also not started (1 event)

Time & API	Arguments	Status	Return	Repeated
CreateServiceW May 23, 2022, 5:58 p.m.	service_start_name: start_type: 2 password: display_name: DMoTfSjjFin.dll filepath: C:\Windows\System32\regsvr32.exe "C:\Windows\system32\ETBrbXAducFMc\DMoTfSjjFin.dll" service_name: DMoTfSjjFin.dll filepath_r: C:\Windows\system32\regsvr32.exe "C:\Windows\system32\ETBrbXAducFMc\DMoTfSjjFin.dll" desired_access: 2 service_handle: 0x00000000004a5650 error_control: 0 service_type: 16 service_manager_handle: 0x000000000047eb50	1	4871760	0

Attempts to remove evidence of file being downloaded from the Internet (1 event)

file	C:\Windows\System32\ETBrbXAducFMc\DMoTfSjjFin.dll:Zone.Identifier

9boJQZpTSdQE

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