Malware Analysis Report

2025-06-16 03:09

Sample ID 210805-3k61w5k17n
Target gunzipped.exe
SHA256 40ef0ea8d499ef74760da82a71c8cf548149e01826b62767c75431cc4cdad67f
Tags
oski remcos remotehost discovery infostealer rat spyware stealer suricata
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

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

40ef0ea8d499ef74760da82a71c8cf548149e01826b62767c75431cc4cdad67f

Threat Level: Known bad

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

Malicious Activity Summary

oski remcos remotehost discovery infostealer rat spyware stealer suricata

suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil

Oski

Remcos

suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

NirSoft MailPassView

NirSoft WebBrowserPassView

Nirsoft

Executes dropped EXE

Downloads MZ/PE file

Reads user/profile data of web browsers

Loads dropped DLL

Checks installed software on the system

Accesses cryptocurrency files/wallets, possible credential harvesting

Suspicious use of SetThreadContext

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Kills process with taskkill

Checks processor information in registry

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2021-08-05 09:52

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2021-08-05 09:52

Reported

2021-08-05 09:55

Platform

win7v20210410

Max time kernel

149s

Max time network

183s

Command Line

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

Signatures

Oski

infostealer oski

Remcos

rat remcos

suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

suricata

suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil

suricata

NirSoft MailPassView

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

NirSoft WebBrowserPassView

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

Nirsoft

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

Downloads MZ/PE file

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\srsc.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\srsc.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\srsc.exe N/A

Reads user/profile data of web browsers

spyware stealer

Accesses cryptocurrency files/wallets, possible credential harvesting

spyware

Checks installed software on the system

discovery

Enumerates physical storage devices

Checks processor information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Users\Admin\AppData\Roaming\srsc.exe N/A

Kills process with taskkill

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\taskkill.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\srsc.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\taskkill.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1072 wrote to memory of 468 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 1072 wrote to memory of 468 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 1072 wrote to memory of 468 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 1072 wrote to memory of 468 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 1072 wrote to memory of 468 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 1072 wrote to memory of 468 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 1072 wrote to memory of 468 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 1072 wrote to memory of 468 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 1072 wrote to memory of 468 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 1072 wrote to memory of 468 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 1072 wrote to memory of 468 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 1072 wrote to memory of 468 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 1072 wrote to memory of 468 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 468 wrote to memory of 1836 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Roaming\srsc.exe
PID 468 wrote to memory of 1836 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Roaming\srsc.exe
PID 468 wrote to memory of 1836 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Roaming\srsc.exe
PID 468 wrote to memory of 1836 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Roaming\srsc.exe
PID 468 wrote to memory of 968 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 468 wrote to memory of 968 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 468 wrote to memory of 968 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 468 wrote to memory of 968 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 468 wrote to memory of 968 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 468 wrote to memory of 968 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 468 wrote to memory of 968 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 468 wrote to memory of 968 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 468 wrote to memory of 968 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 468 wrote to memory of 360 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 468 wrote to memory of 360 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 468 wrote to memory of 360 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 468 wrote to memory of 360 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 468 wrote to memory of 360 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 468 wrote to memory of 360 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 468 wrote to memory of 360 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 468 wrote to memory of 360 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 468 wrote to memory of 360 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 468 wrote to memory of 824 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 468 wrote to memory of 824 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 468 wrote to memory of 824 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 468 wrote to memory of 824 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 468 wrote to memory of 824 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 468 wrote to memory of 824 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 468 wrote to memory of 824 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 468 wrote to memory of 824 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 468 wrote to memory of 824 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 1836 wrote to memory of 900 N/A C:\Users\Admin\AppData\Roaming\srsc.exe C:\Users\Admin\AppData\Roaming\srsc.exe
PID 1836 wrote to memory of 900 N/A C:\Users\Admin\AppData\Roaming\srsc.exe C:\Users\Admin\AppData\Roaming\srsc.exe
PID 1836 wrote to memory of 900 N/A C:\Users\Admin\AppData\Roaming\srsc.exe C:\Users\Admin\AppData\Roaming\srsc.exe
PID 1836 wrote to memory of 900 N/A C:\Users\Admin\AppData\Roaming\srsc.exe C:\Users\Admin\AppData\Roaming\srsc.exe
PID 1836 wrote to memory of 1352 N/A C:\Users\Admin\AppData\Roaming\srsc.exe C:\Users\Admin\AppData\Roaming\srsc.exe
PID 1836 wrote to memory of 1352 N/A C:\Users\Admin\AppData\Roaming\srsc.exe C:\Users\Admin\AppData\Roaming\srsc.exe
PID 1836 wrote to memory of 1352 N/A C:\Users\Admin\AppData\Roaming\srsc.exe C:\Users\Admin\AppData\Roaming\srsc.exe
PID 1836 wrote to memory of 1352 N/A C:\Users\Admin\AppData\Roaming\srsc.exe C:\Users\Admin\AppData\Roaming\srsc.exe
PID 1836 wrote to memory of 1352 N/A C:\Users\Admin\AppData\Roaming\srsc.exe C:\Users\Admin\AppData\Roaming\srsc.exe
PID 1836 wrote to memory of 1352 N/A C:\Users\Admin\AppData\Roaming\srsc.exe C:\Users\Admin\AppData\Roaming\srsc.exe
PID 1836 wrote to memory of 1352 N/A C:\Users\Admin\AppData\Roaming\srsc.exe C:\Users\Admin\AppData\Roaming\srsc.exe
PID 1836 wrote to memory of 1352 N/A C:\Users\Admin\AppData\Roaming\srsc.exe C:\Users\Admin\AppData\Roaming\srsc.exe
PID 1836 wrote to memory of 1352 N/A C:\Users\Admin\AppData\Roaming\srsc.exe C:\Users\Admin\AppData\Roaming\srsc.exe
PID 1836 wrote to memory of 1352 N/A C:\Users\Admin\AppData\Roaming\srsc.exe C:\Users\Admin\AppData\Roaming\srsc.exe
PID 1352 wrote to memory of 1992 N/A C:\Users\Admin\AppData\Roaming\srsc.exe C:\Windows\SysWOW64\cmd.exe
PID 1352 wrote to memory of 1992 N/A C:\Users\Admin\AppData\Roaming\srsc.exe C:\Windows\SysWOW64\cmd.exe
PID 1352 wrote to memory of 1992 N/A C:\Users\Admin\AppData\Roaming\srsc.exe C:\Windows\SysWOW64\cmd.exe
PID 1352 wrote to memory of 1992 N/A C:\Users\Admin\AppData\Roaming\srsc.exe C:\Windows\SysWOW64\cmd.exe
PID 1992 wrote to memory of 1072 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 1992 wrote to memory of 1072 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe

Processes

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

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

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

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

C:\Users\Admin\AppData\Roaming\srsc.exe

"C:\Users\Admin\AppData\Roaming\srsc.exe"

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

C:\Users\Admin\AppData\Local\Temp\gunzipped.exe /stext "C:\Users\Admin\AppData\Local\Temp\ssfzqggawsykuiwtf"

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

C:\Users\Admin\AppData\Local\Temp\gunzipped.exe /stext "C:\Users\Admin\AppData\Local\Temp\vmsrqzrtjaqpwosxoypbf"

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

C:\Users\Admin\AppData\Local\Temp\gunzipped.exe /stext "C:\Users\Admin\AppData\Local\Temp\foxkrrcvfiicgugbyjjdqmjy"

C:\Users\Admin\AppData\Roaming\srsc.exe

"C:\Users\Admin\AppData\Roaming\srsc.exe"

C:\Users\Admin\AppData\Roaming\srsc.exe

"C:\Users\Admin\AppData\Roaming\srsc.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /pid 1352 & erase C:\Users\Admin\AppData\Roaming\srsc.exe & RD /S /Q C:\\ProgramData\\246363220654038\\* & exit

C:\Windows\SysWOW64\taskkill.exe

taskkill /pid 1352

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

C:\Users\Admin\AppData\Local\Temp\gunzipped.exe /stext "C:\Users\Admin\AppData\Local\Temp\zfdhtw"

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

C:\Users\Admin\AppData\Local\Temp\gunzipped.exe /stext "C:\Users\Admin\AppData\Local\Temp\czrzuocgj"

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

C:\Users\Admin\AppData\Local\Temp\gunzipped.exe /stext "C:\Users\Admin\AppData\Local\Temp\mbwsvhnifulfr"

Network

Country Destination Domain Proto
N/A 8.8.8.8:53 ostriuyer.myddns.me udp
N/A 194.5.97.94:7116 ostriuyer.myddns.me tcp
N/A 194.5.97.94:7116 ostriuyer.myddns.me tcp
N/A 194.5.97.94:7116 ostriuyer.myddns.me tcp
N/A 194.5.97.94:7116 ostriuyer.myddns.me tcp
N/A 8.8.8.8:53 marbellacabs.com udp
N/A 160.153.128.9:80 marbellacabs.com tcp
N/A 194.5.97.94:7116 ostriuyer.myddns.me tcp

Files

memory/1072-59-0x0000000000AF0000-0x0000000000AF1000-memory.dmp

memory/1072-61-0x0000000004F10000-0x0000000004F11000-memory.dmp

memory/1072-62-0x0000000000440000-0x0000000000453000-memory.dmp

memory/1072-63-0x0000000009210000-0x00000000092E1000-memory.dmp

memory/1072-64-0x0000000005E70000-0x0000000005EE5000-memory.dmp

memory/468-66-0x000000000042F76C-mapping.dmp

memory/468-65-0x0000000000400000-0x0000000000479000-memory.dmp

memory/468-67-0x00000000768B1000-0x00000000768B3000-memory.dmp

memory/468-68-0x0000000000400000-0x0000000000479000-memory.dmp

\Users\Admin\AppData\Roaming\srsc.exe

MD5 3e8e29ab05cb639a6400da227edcb95d
SHA1 2025890310d262b7ed6a9ef278ad31451408e497
SHA256 f97f6b0ddaeec2698ad2d2403031fab366438bc8a046a7d29b3f0ae801c41f37
SHA512 306f5b94f8a91021cf60acde59059089c392b0a89082a1de881dc6974bbd8d21416a117574ae24882aa203aa99473e83bc369887880d422f866b646ae2450dba

memory/1836-70-0x0000000000000000-mapping.dmp

C:\Users\Admin\AppData\Roaming\srsc.exe

MD5 3e8e29ab05cb639a6400da227edcb95d
SHA1 2025890310d262b7ed6a9ef278ad31451408e497
SHA256 f97f6b0ddaeec2698ad2d2403031fab366438bc8a046a7d29b3f0ae801c41f37
SHA512 306f5b94f8a91021cf60acde59059089c392b0a89082a1de881dc6974bbd8d21416a117574ae24882aa203aa99473e83bc369887880d422f866b646ae2450dba

C:\Users\Admin\AppData\Roaming\srsc.exe

MD5 3e8e29ab05cb639a6400da227edcb95d
SHA1 2025890310d262b7ed6a9ef278ad31451408e497
SHA256 f97f6b0ddaeec2698ad2d2403031fab366438bc8a046a7d29b3f0ae801c41f37
SHA512 306f5b94f8a91021cf60acde59059089c392b0a89082a1de881dc6974bbd8d21416a117574ae24882aa203aa99473e83bc369887880d422f866b646ae2450dba

memory/1836-73-0x0000000000930000-0x0000000000931000-memory.dmp

memory/1836-75-0x0000000004C60000-0x0000000004C61000-memory.dmp

memory/968-77-0x0000000000400000-0x0000000000478000-memory.dmp

memory/968-78-0x0000000000476274-mapping.dmp

memory/360-81-0x0000000000422206-mapping.dmp

memory/360-80-0x0000000000400000-0x0000000000424000-memory.dmp

memory/824-83-0x0000000000400000-0x0000000000457000-memory.dmp

memory/824-84-0x0000000000455238-mapping.dmp

memory/968-86-0x0000000000400000-0x0000000000478000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\ssfzqggawsykuiwtf

MD5 f3b25701fe362ec84616a93a45ce9998
SHA1 d62636d8caec13f04e28442a0a6fa1afeb024bbb
SHA256 b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209
SHA512 98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

memory/360-87-0x0000000000400000-0x0000000000424000-memory.dmp

memory/824-89-0x0000000000400000-0x0000000000457000-memory.dmp

memory/1836-90-0x00000000073D0000-0x0000000007463000-memory.dmp

memory/1836-91-0x0000000002030000-0x0000000002064000-memory.dmp

C:\Users\Admin\AppData\Roaming\srsc.exe

MD5 3e8e29ab05cb639a6400da227edcb95d
SHA1 2025890310d262b7ed6a9ef278ad31451408e497
SHA256 f97f6b0ddaeec2698ad2d2403031fab366438bc8a046a7d29b3f0ae801c41f37
SHA512 306f5b94f8a91021cf60acde59059089c392b0a89082a1de881dc6974bbd8d21416a117574ae24882aa203aa99473e83bc369887880d422f866b646ae2450dba

memory/1352-93-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1352-94-0x000000000040717B-mapping.dmp

C:\Users\Admin\AppData\Roaming\srsc.exe

MD5 3e8e29ab05cb639a6400da227edcb95d
SHA1 2025890310d262b7ed6a9ef278ad31451408e497
SHA256 f97f6b0ddaeec2698ad2d2403031fab366438bc8a046a7d29b3f0ae801c41f37
SHA512 306f5b94f8a91021cf60acde59059089c392b0a89082a1de881dc6974bbd8d21416a117574ae24882aa203aa99473e83bc369887880d422f866b646ae2450dba

memory/1352-97-0x0000000000400000-0x0000000000438000-memory.dmp

\ProgramData\sqlite3.dll

MD5 e477a96c8f2b18d6b5c27bde49c990bf
SHA1 e980c9bf41330d1e5bd04556db4646a0210f7409
SHA256 16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660
SHA512 335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c

\ProgramData\nss3.dll

MD5 bfac4e3c5908856ba17d41edcd455a51
SHA1 8eec7e888767aa9e4cca8ff246eb2aacb9170428
SHA256 e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78
SHA512 2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

\ProgramData\mozglue.dll

MD5 8f73c08a9660691143661bf7332c3c27
SHA1 37fa65dd737c50fda710fdbde89e51374d0c204a
SHA256 3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd
SHA512 0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

\ProgramData\msvcp140.dll

MD5 109f0f02fd37c84bfc7508d4227d7ed5
SHA1 ef7420141bb15ac334d3964082361a460bfdb975
SHA256 334e69ac9367f708ce601a6f490ff227d6c20636da5222f148b25831d22e13d4
SHA512 46eb62b65817365c249b48863d894b4669e20fcb3992e747cd5c9fdd57968e1b2cf7418d1c9340a89865eadda362b8db51947eb4427412eb83b35994f932fd39

\ProgramData\vcruntime140.dll

MD5 7587bf9cb4147022cd5681b015183046
SHA1 f2106306a8f6f0da5afb7fc765cfa0757ad5a628
SHA256 c40bb03199a2054dabfc7a8e01d6098e91de7193619effbd0f142a7bf031c14d
SHA512 0b63e4979846ceba1b1ed8470432ea6aa18cca66b5f5322d17b14bc0dfa4b2ee09ca300a016e16a01db5123e4e022820698f46d9bad1078bd24675b4b181e91f

memory/1992-103-0x0000000000000000-mapping.dmp

memory/1072-104-0x0000000000000000-mapping.dmp

memory/800-106-0x0000000000422206-mapping.dmp

memory/1880-109-0x0000000000455238-mapping.dmp

memory/800-111-0x0000000000400000-0x0000000000424000-memory.dmp

memory/1880-112-0x0000000000400000-0x0000000000457000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2021-08-05 09:52

Reported

2021-08-05 09:54

Platform

win10v20210410

Max time kernel

148s

Max time network

148s

Command Line

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

Signatures

Oski

infostealer oski

Remcos

rat remcos

Downloads MZ/PE file

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\srsc.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\srsc.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\srsc.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\srsc.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\srsc.exe N/A

Reads user/profile data of web browsers

spyware stealer

Accesses cryptocurrency files/wallets, possible credential harvesting

spyware

Checks installed software on the system

discovery

Enumerates physical storage devices

Checks processor information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Users\Admin\AppData\Roaming\srsc.exe N/A

Kills process with taskkill

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\taskkill.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\srsc.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\taskkill.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3484 wrote to memory of 2500 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 3484 wrote to memory of 2500 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 3484 wrote to memory of 2500 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 3484 wrote to memory of 2500 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 3484 wrote to memory of 2500 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 3484 wrote to memory of 2500 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 3484 wrote to memory of 2500 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 3484 wrote to memory of 2500 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 3484 wrote to memory of 2500 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 3484 wrote to memory of 2500 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 3484 wrote to memory of 2500 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 3484 wrote to memory of 2500 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2500 wrote to memory of 2424 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Roaming\srsc.exe
PID 2500 wrote to memory of 2424 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Roaming\srsc.exe
PID 2500 wrote to memory of 2424 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Roaming\srsc.exe
PID 2500 wrote to memory of 2308 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2500 wrote to memory of 2308 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2500 wrote to memory of 2308 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2500 wrote to memory of 348 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2500 wrote to memory of 348 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2500 wrote to memory of 348 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2500 wrote to memory of 348 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2500 wrote to memory of 348 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2500 wrote to memory of 348 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2500 wrote to memory of 348 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2500 wrote to memory of 348 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2500 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2500 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2500 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2500 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2500 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2500 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2500 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2500 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2424 wrote to memory of 2144 N/A C:\Users\Admin\AppData\Roaming\srsc.exe C:\Users\Admin\AppData\Roaming\srsc.exe
PID 2424 wrote to memory of 2144 N/A C:\Users\Admin\AppData\Roaming\srsc.exe C:\Users\Admin\AppData\Roaming\srsc.exe
PID 2424 wrote to memory of 2144 N/A C:\Users\Admin\AppData\Roaming\srsc.exe C:\Users\Admin\AppData\Roaming\srsc.exe
PID 2424 wrote to memory of 2144 N/A C:\Users\Admin\AppData\Roaming\srsc.exe C:\Users\Admin\AppData\Roaming\srsc.exe
PID 2424 wrote to memory of 2144 N/A C:\Users\Admin\AppData\Roaming\srsc.exe C:\Users\Admin\AppData\Roaming\srsc.exe
PID 2424 wrote to memory of 2144 N/A C:\Users\Admin\AppData\Roaming\srsc.exe C:\Users\Admin\AppData\Roaming\srsc.exe
PID 2424 wrote to memory of 2144 N/A C:\Users\Admin\AppData\Roaming\srsc.exe C:\Users\Admin\AppData\Roaming\srsc.exe
PID 2424 wrote to memory of 2144 N/A C:\Users\Admin\AppData\Roaming\srsc.exe C:\Users\Admin\AppData\Roaming\srsc.exe
PID 2424 wrote to memory of 2144 N/A C:\Users\Admin\AppData\Roaming\srsc.exe C:\Users\Admin\AppData\Roaming\srsc.exe
PID 2144 wrote to memory of 2008 N/A C:\Users\Admin\AppData\Roaming\srsc.exe C:\Windows\SysWOW64\cmd.exe
PID 2144 wrote to memory of 2008 N/A C:\Users\Admin\AppData\Roaming\srsc.exe C:\Windows\SysWOW64\cmd.exe
PID 2144 wrote to memory of 2008 N/A C:\Users\Admin\AppData\Roaming\srsc.exe C:\Windows\SysWOW64\cmd.exe
PID 2008 wrote to memory of 3836 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 2008 wrote to memory of 3836 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 2008 wrote to memory of 3836 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe

Processes

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

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

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

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

C:\Users\Admin\AppData\Roaming\srsc.exe

"C:\Users\Admin\AppData\Roaming\srsc.exe"

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

C:\Users\Admin\AppData\Local\Temp\gunzipped.exe /stext "C:\Users\Admin\AppData\Local\Temp\bqnrcgjouvtcjovryhasqhpev"

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

C:\Users\Admin\AppData\Local\Temp\gunzipped.exe /stext "C:\Users\Admin\AppData\Local\Temp\mkskdzuiidlhlusvpsmttmkvwiwjw"

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

C:\Users\Admin\AppData\Local\Temp\gunzipped.exe /stext "C:\Users\Admin\AppData\Local\Temp\omyverfjwldmvigzychvezxeepgspwvv"

C:\Users\Admin\AppData\Roaming\srsc.exe

"C:\Users\Admin\AppData\Roaming\srsc.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /pid 2144 & erase C:\Users\Admin\AppData\Roaming\srsc.exe & RD /S /Q C:\\ProgramData\\280077228644132\\* & exit

C:\Windows\SysWOW64\taskkill.exe

taskkill /pid 2144

Network

Country Destination Domain Proto
N/A 8.8.8.8:53 ostriuyer.myddns.me udp
N/A 194.5.97.94:7116 ostriuyer.myddns.me tcp
N/A 194.5.97.94:7116 ostriuyer.myddns.me tcp
N/A 194.5.97.94:7116 ostriuyer.myddns.me tcp
N/A 194.5.97.94:7116 ostriuyer.myddns.me tcp
N/A 8.8.8.8:53 marbellacabs.com udp
N/A 160.153.128.9:80 marbellacabs.com tcp

Files

memory/3484-114-0x00000000006B0000-0x00000000006B1000-memory.dmp

memory/3484-116-0x0000000004FE0000-0x0000000004FE1000-memory.dmp

memory/3484-117-0x0000000005580000-0x0000000005581000-memory.dmp

memory/3484-118-0x0000000005120000-0x0000000005121000-memory.dmp

memory/3484-119-0x0000000005080000-0x0000000005081000-memory.dmp

memory/3484-120-0x0000000005280000-0x0000000005281000-memory.dmp

memory/3484-121-0x0000000004F90000-0x0000000004F91000-memory.dmp

memory/3484-122-0x0000000005420000-0x0000000005433000-memory.dmp

memory/3484-123-0x0000000009AE0000-0x0000000009BB1000-memory.dmp

memory/3484-124-0x000000000BFC0000-0x000000000C035000-memory.dmp

memory/2500-125-0x0000000000400000-0x0000000000479000-memory.dmp

memory/2500-126-0x000000000042F76C-mapping.dmp

memory/2500-127-0x0000000000400000-0x0000000000479000-memory.dmp

C:\Users\Admin\AppData\Roaming\srsc.exe

MD5 3e8e29ab05cb639a6400da227edcb95d
SHA1 2025890310d262b7ed6a9ef278ad31451408e497
SHA256 f97f6b0ddaeec2698ad2d2403031fab366438bc8a046a7d29b3f0ae801c41f37
SHA512 306f5b94f8a91021cf60acde59059089c392b0a89082a1de881dc6974bbd8d21416a117574ae24882aa203aa99473e83bc369887880d422f866b646ae2450dba

memory/2424-128-0x0000000000000000-mapping.dmp

C:\Users\Admin\AppData\Roaming\srsc.exe

MD5 3e8e29ab05cb639a6400da227edcb95d
SHA1 2025890310d262b7ed6a9ef278ad31451408e497
SHA256 f97f6b0ddaeec2698ad2d2403031fab366438bc8a046a7d29b3f0ae801c41f37
SHA512 306f5b94f8a91021cf60acde59059089c392b0a89082a1de881dc6974bbd8d21416a117574ae24882aa203aa99473e83bc369887880d422f866b646ae2450dba

memory/2424-131-0x0000000000A10000-0x0000000000A11000-memory.dmp

memory/348-139-0x0000000000422206-mapping.dmp

memory/348-138-0x0000000000400000-0x0000000000424000-memory.dmp

memory/1208-140-0x0000000000400000-0x0000000000457000-memory.dmp

memory/2424-141-0x0000000005410000-0x000000000590E000-memory.dmp

memory/348-144-0x0000000000400000-0x0000000000424000-memory.dmp

memory/1208-143-0x0000000000455238-mapping.dmp

memory/1208-145-0x0000000000400000-0x0000000000457000-memory.dmp

memory/2424-146-0x0000000009B10000-0x0000000009BA3000-memory.dmp

memory/2424-147-0x000000000BF70000-0x000000000BFA4000-memory.dmp

memory/2144-148-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2144-149-0x000000000040717B-mapping.dmp

C:\Users\Admin\AppData\Roaming\srsc.exe

MD5 3e8e29ab05cb639a6400da227edcb95d
SHA1 2025890310d262b7ed6a9ef278ad31451408e497
SHA256 f97f6b0ddaeec2698ad2d2403031fab366438bc8a046a7d29b3f0ae801c41f37
SHA512 306f5b94f8a91021cf60acde59059089c392b0a89082a1de881dc6974bbd8d21416a117574ae24882aa203aa99473e83bc369887880d422f866b646ae2450dba

memory/2144-151-0x0000000000400000-0x0000000000438000-memory.dmp

\ProgramData\nss3.dll

MD5 bfac4e3c5908856ba17d41edcd455a51
SHA1 8eec7e888767aa9e4cca8ff246eb2aacb9170428
SHA256 e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78
SHA512 2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

\ProgramData\sqlite3.dll

MD5 e477a96c8f2b18d6b5c27bde49c990bf
SHA1 e980c9bf41330d1e5bd04556db4646a0210f7409
SHA256 16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660
SHA512 335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c

\ProgramData\mozglue.dll

MD5 8f73c08a9660691143661bf7332c3c27
SHA1 37fa65dd737c50fda710fdbde89e51374d0c204a
SHA256 3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd
SHA512 0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

memory/2008-155-0x0000000000000000-mapping.dmp

memory/3836-156-0x0000000000000000-mapping.dmp