Summary | ZeroBOX

Category	Machine	Started	Completed
FILE	s1_win7_x6403_us	July 17, 2023, 4:36 p.m.	July 17, 2023, 4:38 p.m.

Size	684.0KB
Type	PE32 executable (GUI) Intel 80386, for MS Windows
MD5	`4b26c5d77671cf27c5985bc4435f8c44`
SHA256	`3afa4d43deae2aad0375c5a5075bf49f28a35aa85b811807419a38ad3e63d389`
CRC32	`B3152578`
ssdeep	`12288:exndS6phb/cci16UFHRT+fv8ASQYmnwxIRP0OHLaChB:e1pZ/e6U7q3yLmnwKB0OPh`
Yara	UPX_Zero - UPX packed file mzp_file_format - MZP(Delphi) file format Malicious_Library_Zero - Malicious_Library PE_Header_Zero - PE File Signature IsPE32 - (no description)

csrssfs.exe "C:\Users\test22\AppData\Local\Temp\csrssfs.exe"
840

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

The executable contains unknown PE section names indicative of a packer (could be a false positive) (3 events)

section	CODE
section	DATA
section	BSS

The executable uses a known packer (1 event)

packer

BobSoft Mini Delphi -> BoB / BobSoft

Allocates read-write-execute memory (usually to unpack itself) (13 events)

Time & API	Arguments	Status	Return
NtAllocateVirtualMemory July 17, 2023, 4:36 p.m.	process_identifier: 840 region_size: 4096 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x00500000 allocation_type: 4096 (MEM_COMMIT) process_handle: 0xffffffff	1	0
NtProtectVirtualMemory July 17, 2023, 4:36 p.m.	process_identifier: 840 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 length: 4 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x00000000 process_handle: 0xffffffff		3221225496
NtProtectVirtualMemory July 17, 2023, 4:36 p.m.	process_identifier: 840 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 length: 4096 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x00499000 process_handle: 0xffffffff	1	0
NtProtectVirtualMemory July 17, 2023, 4:36 p.m.	process_identifier: 840 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 length: 4096 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x00499000 process_handle: 0xffffffff	1	0
NtProtectVirtualMemory July 17, 2023, 4:36 p.m.	process_identifier: 840 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 length: 4096 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x00499000 process_handle: 0xffffffff	1	0
NtProtectVirtualMemory July 17, 2023, 4:36 p.m.	process_identifier: 840 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 length: 4096 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x00499000 process_handle: 0xffffffff	1	0
NtProtectVirtualMemory July 17, 2023, 4:36 p.m.	process_identifier: 840 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 length: 4096 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x00499000 process_handle: 0xffffffff	1	0
NtProtectVirtualMemory July 17, 2023, 4:36 p.m.	process_identifier: 840 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 length: 4096 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x00499000 process_handle: 0xffffffff	1	0
NtProtectVirtualMemory July 17, 2023, 4:36 p.m.	process_identifier: 840 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 length: 4096 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x00499000 process_handle: 0xffffffff	1	0
NtProtectVirtualMemory July 17, 2023, 4:36 p.m.	process_identifier: 840 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 length: 4096 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x00499000 process_handle: 0xffffffff	1	0
NtProtectVirtualMemory July 17, 2023, 4:36 p.m.	process_identifier: 840 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 length: 4096 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x00499000 process_handle: 0xffffffff	1	0
NtProtectVirtualMemory July 17, 2023, 4:36 p.m.	process_identifier: 840 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 length: 4096 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x00499000 process_handle: 0xffffffff	1	0
NtProtectVirtualMemory July 17, 2023, 4:36 p.m.	process_identifier: 840 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 0 length: 4096 protection: 64 (PAGE_EXECUTE_READWRITE) base_address: 0x00499000 process_handle: 0xffffffff	1	0

Changes read-write memory protection to read-execute (probably to avoid detection when setting all RWX flags at the same time) (1 event)

Time & API	Arguments	Status	Return	Repeated
NtProtectVirtualMemory July 17, 2023, 4:36 p.m.	process_identifier: 840 stack_dep_bypass: 0 stack_pivoted: 0 heap_dep_bypass: 1 length: 147456 protection: 32 (PAGE_EXECUTE_READ) base_address: 0x02b31000 process_handle: 0xffffffff	1	0	0

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

section

{u'size_of_data': u'0x00038000', u'virtual_address': u'0x00061000', u'entropy': 6.945841797507477, u'name': u'DATA', u'virtual_size': u'0x00037ec4'}

entropy

6.94584179751

description

A section with a high entropy has been found

entropy

0.327964860908

description

Overall entropy of this PE file is high

File has been identified by 16 AntiVirus engines on VirusTotal as malicious (16 events)

Bkav	W32.AIDetectMalware
Lionic	Trojan.Win32.Generic.4!c
Elastic	malicious (high confidence)
McAfee	Artemis!4B26C5D77671
Sangfor	Trojan.Win32.Save.a
CrowdStrike	win/malicious_confidence_90% (W)
Symantec	ML.Attribute.HighConfidence
APEX	Malicious
Cynet	Malicious (score: 100)
McAfee-GW-Edition	BehavesLike.Win32.Worm.jc
Ikarus	Trojan-Downloader.Win32.Banload
Google	Detected
VBA32	Malware-Cryptor.Inject.gen
SentinelOne	Static AI - Suspicious PE
MaxSecure	Trojan.Malware.300983.susgen
Fortinet	W32/ModiLoader.VT!tr

csrssfs.exe

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Suricata TLS

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