Malware Analysis Report

2024-10-23 19:16

Sample ID 230726-qsqb8abh96
Target build_4.exe
SHA256 fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea
Tags
gurcu spyware stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea

Threat Level: Known bad

The file build_4.exe was found to be: Known bad.

Malicious Activity Summary

gurcu spyware stealer

Gurcu family

Gurcu, WhiteSnake

Executes dropped EXE

Reads user/profile data of web browsers

Checks computer location settings

Deletes itself

Looks up external IP address via web service

Unsigned PE

Enumerates physical storage devices

Program crash

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Runs ping.exe

Modifies system certificate store

Creates scheduled task(s)

Uses Task Scheduler COM API

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-07-26 13:31

Signatures

Gurcu family

gurcu

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-07-26 13:31

Reported

2023-07-26 13:34

Platform

win7-20230712-en

Max time kernel

117s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\build_4.exe"

Signatures

Gurcu, WhiteSnake

stealer gurcu

Deletes itself

Description Indicator Process Target
N/A N/A C:\Windows\System32\cmd.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe N/A

Reads user/profile data of web browsers

spyware stealer

Looks up external IP address via web service

Description Indicator Process Target
N/A ip-api.com N/A N/A

Enumerates physical storage devices

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\system32\schtasks.exe N/A

Modifies system certificate store

evasion spyware trojan
Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8 C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe N/A
Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8\Blob = 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 C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13 C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe N/A
Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13\Blob = 0f00000001000000140000005bcaa1c2780f0bcb5a90770451d96f38963f012d0b000000010000001e000000440053005400200052006f006f0074002000430041002000580033000000090000000100000016000000301406082b0601050507030406082b06010505070301140000000100000014000000c4a7b1a47b2c71fadbe14b9075ffc415608589101d00000001000000100000004558d512eecb27464920897de7b66053030000000100000014000000dac9024f54d8f6df94935fb1732638ca6ad77c1320000000010000004e0300003082034a30820232a003020102021044afb080d6a327ba893039862ef8406b300d06092a864886f70d0101050500303f31243022060355040a131b4469676974616c205369676e617475726520547275737420436f2e311730150603550403130e44535420526f6f74204341205833301e170d3030303933303231313231395a170d3231303933303134303131355a303f31243022060355040a131b4469676974616c205369676e617475726520547275737420436f2e311730150603550403130e44535420526f6f7420434120583330820122300d06092a864886f70d01010105000382010f003082010a0282010100dfafe99750088357b4cc6265f69082ecc7d32c6b30ca5becd9c37dc740c118148be0e83376492ae33f214993ac4e0eaf3e48cb65eefcd3210f65d22ad9328f8ce5f777b0127bb595c089a3a9baed732e7a0c063283a27e8a1430cd11a0e12a38b9790a31fd50bd8065dfb7516383c8e28861ea4b6181ec526bb9a2e24b1a289f48a39e0cda098e3e172e1edd20df5bc62a8aab2ebd70adc50b1a25907472c57b6aab34d63089ffe568137b540bc8d6aeec5a9c921e3d64b38cc6dfbfc94170ec1672d526ec38553943d0fcfd185c40f197ebd59a9b8d1dbada25b9c6d8dfc115023aabda6ef13e2ef55c089c3cd68369e4109b192ab62957e3e53d9b9ff0025d0203010001a3423040300f0603551d130101ff040530030101ff300e0603551d0f0101ff040403020106301d0603551d0e04160414c4a7b1a47b2c71fadbe14b9075ffc41560858910300d06092a864886f70d01010505000382010100a31a2c9b17005ca91eee2866373abf83c73f4bc309a095205de3d95944d23e0d3ebd8a4ba0741fce10829c741a1d7e981addcb134bb32044e491e9ccfc7da5db6ae5fee6fde04eddb7003ab57049aff2e5eb02f1d1028b19cb943a5e48c4181e58195f1e025af00cf1b1ada9dc59868b6ee991f586cafab96633aa595bcee2a7167347cb2bcc99b03748cfe3564bf5cf0f0c723287c6f044bb53726d43f526489a5267b758abfe67767178db0da256141339243185a2a8025a3047e1dd5007bc02099000eb6463609b16bc88c912e6d27d918bf93d328d65b4e97cb15776eac5b62839bf15651cc8f677966a0a8d770bd8910b048e07db29b60aee9d82353510 C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe N/A
Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13\Blob = 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 C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe N/A
Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13\Blob = 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 C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe N/A

Runs ping.exe

Description Indicator Process Target
N/A N/A C:\Windows\system32\PING.EXE N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2060 wrote to memory of 1952 N/A C:\Users\Admin\AppData\Local\Temp\build_4.exe C:\Windows\System32\cmd.exe
PID 2060 wrote to memory of 1952 N/A C:\Users\Admin\AppData\Local\Temp\build_4.exe C:\Windows\System32\cmd.exe
PID 2060 wrote to memory of 1952 N/A C:\Users\Admin\AppData\Local\Temp\build_4.exe C:\Windows\System32\cmd.exe
PID 1952 wrote to memory of 2908 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\chcp.com
PID 1952 wrote to memory of 2908 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\chcp.com
PID 1952 wrote to memory of 2908 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\chcp.com
PID 1952 wrote to memory of 2508 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\PING.EXE
PID 1952 wrote to memory of 2508 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\PING.EXE
PID 1952 wrote to memory of 2508 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\PING.EXE
PID 1952 wrote to memory of 2948 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\schtasks.exe
PID 1952 wrote to memory of 2948 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\schtasks.exe
PID 1952 wrote to memory of 2948 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\schtasks.exe
PID 1952 wrote to memory of 3016 N/A C:\Windows\System32\cmd.exe C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe
PID 1952 wrote to memory of 3016 N/A C:\Windows\System32\cmd.exe C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe
PID 1952 wrote to memory of 3016 N/A C:\Windows\System32\cmd.exe C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe
PID 3016 wrote to memory of 844 N/A C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe C:\Windows\system32\WerFault.exe
PID 3016 wrote to memory of 844 N/A C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe C:\Windows\system32\WerFault.exe
PID 3016 wrote to memory of 844 N/A C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe C:\Windows\system32\WerFault.exe
PID 1856 wrote to memory of 2312 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe
PID 1856 wrote to memory of 2312 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe
PID 1856 wrote to memory of 2312 N/A C:\Windows\system32\taskeng.exe C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe
PID 2312 wrote to memory of 2032 N/A C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe C:\Windows\system32\WerFault.exe
PID 2312 wrote to memory of 2032 N/A C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe C:\Windows\system32\WerFault.exe
PID 2312 wrote to memory of 2032 N/A C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe C:\Windows\system32\WerFault.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\build_4.exe

"C:\Users\Admin\AppData\Local\Temp\build_4.exe"

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "build_4" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\build_4.exe" &&START "" "C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe"

C:\Windows\system32\chcp.com

chcp 65001

C:\Windows\system32\PING.EXE

ping 127.0.0.1

C:\Windows\system32\schtasks.exe

schtasks /create /tn "build_4" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe" /rl HIGHEST /f

C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe

"C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe"

C:\Windows\system32\WerFault.exe

C:\Windows\system32\WerFault.exe -u -p 3016 -s 1740

C:\Windows\system32\taskeng.exe

taskeng.exe {8067DBAA-68F4-4A35-97EC-CD9B2D7C45E0} S-1-5-21-4219371764-2579186923-3390623117-1000:NVACMPYA\Admin:Interactive:[1]

C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe

C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe

C:\Windows\system32\WerFault.exe

C:\Windows\system32\WerFault.exe -u -p 2312 -s 1700

Network

Country Destination Domain Proto
US 8.8.8.8:53 archive.torproject.org udp
DE 159.69.63.226:443 archive.torproject.org tcp
US 8.8.8.8:53 apps.identrust.com udp
NL 95.101.74.213:80 apps.identrust.com tcp
US 8.8.8.8:53 ip-api.com udp
US 208.95.112.1:80 ip-api.com tcp
DE 159.69.63.226:443 archive.torproject.org tcp
US 208.95.112.1:80 ip-api.com tcp

Files

memory/2060-54-0x0000000000B10000-0x0000000000B40000-memory.dmp

memory/2060-55-0x000007FEF5210000-0x000007FEF5BFC000-memory.dmp

memory/2060-56-0x000000001B0E0000-0x000000001B160000-memory.dmp

memory/2060-59-0x000007FEF5210000-0x000007FEF5BFC000-memory.dmp

C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe

MD5 547933c1a8ea0eb111e619d70ca2c657
SHA1 aca394a095c3951ace115ac621a67df1ff4d2e33
SHA256 fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea
SHA512 5df1b41c5f19e304cc0758b175252c17cc6ccb1d3d91ba2f153138dfbd8e2ef3cd6efe8a136559c55952bdb43a7f206f7ba4e04674ee95363ca8409e48745c2b

C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe

MD5 547933c1a8ea0eb111e619d70ca2c657
SHA1 aca394a095c3951ace115ac621a67df1ff4d2e33
SHA256 fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea
SHA512 5df1b41c5f19e304cc0758b175252c17cc6ccb1d3d91ba2f153138dfbd8e2ef3cd6efe8a136559c55952bdb43a7f206f7ba4e04674ee95363ca8409e48745c2b

memory/3016-63-0x0000000000050000-0x0000000000080000-memory.dmp

memory/3016-64-0x000007FEF4820000-0x000007FEF520C000-memory.dmp

memory/3016-65-0x000000001B050000-0x000000001B0D0000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\Cab984C.tmp

MD5 3ac860860707baaf32469fa7cc7c0192
SHA1 c33c2acdaba0e6fa41fd2f00f186804722477639
SHA256 d015145d551ecd14916270efad773bbc9fd57fad2228d2c24559f696c961d904
SHA512 d62ad2408c969a95550fb87efda50f988770ba5e39972041bf85924275baf156b8bec309ecc6409e5acdd37ec175dea40eff921ab58933b5b5b5d35a6147567c

C:\Users\Admin\AppData\Local\Temp\Tar9A91.tmp

MD5 4ff65ad929cd9a367680e0e5b1c08166
SHA1 c0af0d4396bd1f15c45f39d3b849ba444233b3a2
SHA256 c8733c93cc5aaf5ca206d06af22ee8dbdec764fb5085019a6a9181feb9dfdee6
SHA512 f530dc0d024a5a3b8903ffaaa41b608a5ccdd6da4ba1949f2c2e55a9fca475fec5c8d2119b5763cabe7ef1c3788fb9dcac621869db51d65b1d83cfe404fb4c27

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

MD5 369eb93a63c2c39eecf3c9f560d17942
SHA1 755373bd82048e005d30eda89acae88549062dea
SHA256 62e09dd6864817b58f490317eeb9acfa39d6b127c2fad4874398c1476ed8c7ee
SHA512 9ee13d121aa926a02e577a51ff503dac95bbf9165f13c1e5821aa441cdb2d63b0d471fe46a37784992e45eb3400b74bcd698b81b67b86b600e7db3bc239aa143

C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe

MD5 547933c1a8ea0eb111e619d70ca2c657
SHA1 aca394a095c3951ace115ac621a67df1ff4d2e33
SHA256 fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea
SHA512 5df1b41c5f19e304cc0758b175252c17cc6ccb1d3d91ba2f153138dfbd8e2ef3cd6efe8a136559c55952bdb43a7f206f7ba4e04674ee95363ca8409e48745c2b

memory/3016-130-0x000007FEF4820000-0x000007FEF520C000-memory.dmp

memory/2312-131-0x000007FEF4820000-0x000007FEF520C000-memory.dmp

memory/2312-132-0x000000001B050000-0x000000001B0D0000-memory.dmp

C:\Users\Admin\AppData\Local\d92pmiifqt\port.dat

MD5 11d867796d85db8cad5280ac44cec7c1
SHA1 0a13a10c21102ee6ee57c9095dd9b323f678ea11
SHA256 7ef4694c838dc3db5176c6531eeb3f9290e229b4ed08f83100c809fbc1ee7b73
SHA512 5c870ac28198460bd4fea1a4592ecaf520039e652f27ae53e40fc36c6b477d7c8fb0dfcffbfac70f7e6cce1dc772dd0dea33ca6a5781823864da8140f1eb44e1

memory/3016-134-0x000000001B050000-0x000000001B0D0000-memory.dmp

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

MD5 74edd19a830587326b5409d98cb5a636
SHA1 abed10f930b411f908f504b1f3cf8f9c742a4bc9
SHA256 d133948c45a322ff6f0413f4d88e8747b822faa224c6ccef8807ff32bcd5657f
SHA512 c2a60c9e683c1e3162aa5013be1c356e8a523d8a88509a84db2d3e6e4574b9fb74ba96acda1786fec0b23bf2e97400c2e0759bbbdd4de43123af52069fd9a773

memory/2312-153-0x000007FEF4820000-0x000007FEF520C000-memory.dmp

memory/2312-154-0x000000001B050000-0x000000001B0D0000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-07-26 13:31

Reported

2023-07-26 13:34

Platform

win10v2004-20230703-en

Max time kernel

14s

Max time network

74s

Command Line

"C:\Users\Admin\AppData\Local\Temp\build_4.exe"

Signatures

Gurcu, WhiteSnake

stealer gurcu

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1420546310-613437930-2990200354-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe N/A
Key value queried \REGISTRY\USER\S-1-5-21-1420546310-613437930-2990200354-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\build_4.exe N/A

Reads user/profile data of web browsers

spyware stealer

Looks up external IP address via web service

Description Indicator Process Target
N/A ip-api.com N/A N/A

Enumerates physical storage devices

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\system32\schtasks.exe N/A

Runs ping.exe

Description Indicator Process Target
N/A N/A C:\Windows\system32\PING.EXE N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3624 wrote to memory of 1356 N/A C:\Users\Admin\AppData\Local\Temp\build_4.exe C:\Windows\System32\cmd.exe
PID 3624 wrote to memory of 1356 N/A C:\Users\Admin\AppData\Local\Temp\build_4.exe C:\Windows\System32\cmd.exe
PID 1356 wrote to memory of 2396 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\chcp.com
PID 1356 wrote to memory of 2396 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\chcp.com
PID 1356 wrote to memory of 2848 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\PING.EXE
PID 1356 wrote to memory of 2848 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\PING.EXE
PID 1356 wrote to memory of 3968 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\schtasks.exe
PID 1356 wrote to memory of 3968 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\schtasks.exe
PID 1356 wrote to memory of 4864 N/A C:\Windows\System32\cmd.exe C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe
PID 1356 wrote to memory of 4864 N/A C:\Windows\System32\cmd.exe C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe
PID 4864 wrote to memory of 2312 N/A C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe C:\Windows\System32\tar.exe
PID 4864 wrote to memory of 2312 N/A C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe C:\Windows\System32\tar.exe
PID 4864 wrote to memory of 2692 N/A C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe C:\Users\Admin\AppData\Local\d92pmiifqt\tor\tor.exe
PID 4864 wrote to memory of 2692 N/A C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe C:\Users\Admin\AppData\Local\d92pmiifqt\tor\tor.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\build_4.exe

"C:\Users\Admin\AppData\Local\Temp\build_4.exe"

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "build_4" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\build_4.exe" &&START "" "C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe"

C:\Windows\system32\chcp.com

chcp 65001

C:\Windows\system32\PING.EXE

ping 127.0.0.1

C:\Windows\system32\schtasks.exe

schtasks /create /tn "build_4" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe" /rl HIGHEST /f

C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe

"C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe"

C:\Windows\System32\tar.exe

"C:\Windows\System32\tar.exe" -xvzf "C:\Users\Admin\AppData\Local\Temp\tmp99EE.tmp" -C "C:\Users\Admin\AppData\Local\d92pmiifqt"

C:\Users\Admin\AppData\Local\d92pmiifqt\tor\tor.exe

"C:\Users\Admin\AppData\Local\d92pmiifqt\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\d92pmiifqt\torrc.txt"

C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe

C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 2.136.104.51.in-addr.arpa udp
US 8.8.8.8:53 8.3.197.209.in-addr.arpa udp
US 8.8.8.8:53 17.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 59.128.231.4.in-addr.arpa udp
US 8.8.8.8:53 archive.torproject.org udp
DE 159.69.63.226:443 archive.torproject.org tcp
US 8.8.8.8:53 ip-api.com udp
US 208.95.112.1:80 ip-api.com tcp
US 8.8.8.8:53 226.63.69.159.in-addr.arpa udp
US 8.8.8.8:53 1.112.95.208.in-addr.arpa udp
N/A 127.0.0.1:51022 tcp
IT 190.211.254.182:9001 tcp
NL 178.62.222.195:8080 tcp
IS 93.95.231.115:9001 tcp
US 8.8.8.8:53 182.254.211.190.in-addr.arpa udp
US 8.8.8.8:53 115.231.95.93.in-addr.arpa udp
US 8.8.8.8:53 146.78.124.51.in-addr.arpa udp
DE 45.83.106.225:9001 tcp
US 38.147.122.251:443 tcp
DE 138.3.253.215:9500 tcp
US 8.8.8.8:53 225.106.83.45.in-addr.arpa udp
US 8.8.8.8:53 215.253.3.138.in-addr.arpa udp
US 8.8.8.8:53 251.122.147.38.in-addr.arpa udp

Files

memory/3624-133-0x0000022ED2B80000-0x0000022ED2BB0000-memory.dmp

memory/3624-136-0x00007FFCEC6B0000-0x00007FFCED171000-memory.dmp

memory/3624-137-0x0000022ED4770000-0x0000022ED4780000-memory.dmp

memory/3624-139-0x00007FFCEC6B0000-0x00007FFCED171000-memory.dmp

C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe

MD5 547933c1a8ea0eb111e619d70ca2c657
SHA1 aca394a095c3951ace115ac621a67df1ff4d2e33
SHA256 fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea
SHA512 5df1b41c5f19e304cc0758b175252c17cc6ccb1d3d91ba2f153138dfbd8e2ef3cd6efe8a136559c55952bdb43a7f206f7ba4e04674ee95363ca8409e48745c2b

C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe

MD5 547933c1a8ea0eb111e619d70ca2c657
SHA1 aca394a095c3951ace115ac621a67df1ff4d2e33
SHA256 fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea
SHA512 5df1b41c5f19e304cc0758b175252c17cc6ccb1d3d91ba2f153138dfbd8e2ef3cd6efe8a136559c55952bdb43a7f206f7ba4e04674ee95363ca8409e48745c2b

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\build_4.exe.log

MD5 3308a84a40841fab7dfec198b3c31af7
SHA1 4e7ab6336c0538be5dd7da529c0265b3b6523083
SHA256 169bc31a8d1666535977ca170d246a463e6531bb21faab6c48cb4269d9d60b2e
SHA512 97521d5fb94efdc836ea2723098a1f26a7589a76af51358eee17292d29c9325baf53ad6b4496c5ca3e208d1c9b9ad6797a370e2ae378072fc68f5d6e8b73b198

memory/4864-144-0x00007FFCEBD90000-0x00007FFCEC851000-memory.dmp

memory/4864-145-0x0000024CE2440000-0x0000024CE2450000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp99EE.tmp

MD5 89d2d5811c1aff539bb355f15f3ddad0
SHA1 5bb3577c25b6d323d927200c48cd184a3e27c873
SHA256 b630008f6d3887793d48b87091e56691e292894dd4fa100dc4a418a2f29dcc12
SHA512 39e576124c54143520c5435a2ef9b24506131e13403489c0692f09b89135015d611c4988d4772f8a1e6557fa68b4667d467334461009cee8c2227dfc3e295289

C:\Users\Admin\AppData\Local\d92pmiifqt\tor\tor.exe

MD5 88590909765350c0d70c6c34b1f31dd2
SHA1 129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7
SHA256 46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82
SHA512 a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

C:\Users\Admin\AppData\Local\d92pmiifqt\tor\tor.exe

MD5 88590909765350c0d70c6c34b1f31dd2
SHA1 129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7
SHA256 46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82
SHA512 a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

C:\Users\Admin\AppData\Local\d92pmiifqt\torrc.txt

MD5 d8d2f1fb89b09bc19b8a6b409385c2ba
SHA1 7ffcc834b82f29f7450c31f23e63eff3f0f4c3a9
SHA256 0e81fe4f83b56bf75ca34cdb7d1ae4c3fd89930557495eba78898413513475b9
SHA512 f5ec1d984a5eb6981297622bdcba069f628e6ff3dee892ff9bdf056d269780c605e9ade5bcd9f4feb5f08d2680a07f77df9d30fe6b8b9695e98f34c69dc397fb

C:\Users\Admin\AppData\Local\d92pmiifqt\host\hostname

MD5 8fd12c735dcbc2c813b96daa1534d2e1
SHA1 c1ec8458a9f9ccb53cfe8b9f1194a8476ba4bd8e
SHA256 c395ede6bc68b23bfca363d514099ea0bee6eb7d06016dbb82cae66b7cf4c0b3
SHA512 73c1e511c1995e5eac0c9b7a0cb69d16530a871b3e09d429272ba40b61cc7cbb8b5875abbf38d57ee45c355e73e9fe615d7dfb266f3dde30c9b7d17fdd1133f2

C:\Users\Admin\AppData\Local\d92pmiifqt\data\cached-microdesc-consensus.tmp

MD5 9c51572e470c337066703261d26f0828
SHA1 f8698e779dbfb6e768a73c283cf105147cfa5f36
SHA256 e69a860ddf121131d36f11b84359753b3c9991c488469345f6f0c6f4640afbf1
SHA512 3ac421923caec92941d7ba150669e1ebd975096263ced3f82e7bce9d80a0bf72f080158d40d8d4afcbd8512cf8d4d83056a981f2a7237dfc1312899dee743390

memory/4864-181-0x00007FFCEBD90000-0x00007FFCEC851000-memory.dmp

C:\Users\Admin\AppData\Local\NET.Framework\build_4.exe

MD5 547933c1a8ea0eb111e619d70ca2c657
SHA1 aca394a095c3951ace115ac621a67df1ff4d2e33
SHA256 fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea
SHA512 5df1b41c5f19e304cc0758b175252c17cc6ccb1d3d91ba2f153138dfbd8e2ef3cd6efe8a136559c55952bdb43a7f206f7ba4e04674ee95363ca8409e48745c2b