Analysis
- max time kernel
149s - max time network
149s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows - submitted
17/04/2026, 04:11
Behavioral task
behavioral1
Sample
2026-04-17_dda52b3775c7d5a9d314bc0621378d0a_coinminer_cryptolocker_elex_mafia_stealc_tofsee.exe
Resource
win10v2004-20260130-en
windows10-2004-x64
12 signatures
150 seconds
General
- Target 2026-04-17_dda52b3775c7d5a9d314bc0621378d0a_coinminer_cryptolocker_elex_mafia_stealc_tofsee.exe
- Size 768KB
- Sample260417-esae8ae13m
- SHA256 c6cf82a9c0a483faeaec248556ad3613fd5263ad77b6592fc26f21254d0881bf
- MD5 dda52b3775c7d5a9d314bc0621378d0a
- SHA1 81b9e0aca1fbe0cc1946e57e6726534d54cd36c5
- SHA512 addcb00415327caaa4105d716d714ab0426b8a9734e85ab7678f54227b389a1e735e3c84bde881840ccbfb290bfee0d233f89ac66e39d3cc12184c636ea8c06d
- SSDEEP 12288:MqXUHkUXe39sOkx2LIan5FAQjU/LikGU5rCOTeidT:MjHPOSOkx2LFscU6UQOJdT
- TLSH T104F47D31E241C036D6A74572C6FA4BBBA5247D25431161CBA7C4BA262FB76D2FA3130F
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Signatures
- Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x001000000002707c-2.dat CryptoLocker_rule2 - Detection of Cryptolocker Samples 1 IoCs
resource yara_rule behavioral2/files/0x001000000002707c-2.dat CryptoLocker_set1 - UPX dump on OEP (original entry point) 9 IoCs
resource yara_rule behavioral2/memory/1848-0-0x0000000000C30000-0x0000000000CB9000-memory.dmp UPX behavioral2/files/0x001000000002707c-2.dat UPX behavioral2/memory/5008-3-0x0000000000BD0000-0x0000000000C59000-memory.dmp UPX behavioral2/memory/1848-10-0x0000000000C30000-0x0000000000CB9000-memory.dmp UPX behavioral2/memory/5008-12-0x0000000000BD0000-0x0000000000C59000-memory.dmp UPX behavioral2/memory/1848-23-0x0000000000C30000-0x0000000000CB9000-memory.dmp UPX behavioral2/memory/5008-24-0x0000000000BD0000-0x0000000000C59000-memory.dmp UPX behavioral2/memory/1848-48-0x0000000000C30000-0x0000000000CB9000-memory.dmp UPX behavioral2/memory/1848-49-0x0000000000C30000-0x0000000000CB9000-memory.dmp UPX - Executes dropped EXE 1 IoCs
pid Process 5008 b6403c5d - Unexpected DNS network traffic destination 4 IoCs
Network traffic to other servers than the configured DNS servers was detected on the DNS port.
description flow ioc pid Process Destination IP 1 114.114.114.114 1848 2026-04-17_dda52b3775c7d5a9d314bc0621378d0a_coinminer_cryptolocker_elex_mafia_stealc_tofsee.exe Destination IP 2 223.5.5.5 1848 2026-04-17_dda52b3775c7d5a9d314bc0621378d0a_coinminer_cryptolocker_elex_mafia_stealc_tofsee.exe Destination IP 8 114.114.114.114 1848 2026-04-17_dda52b3775c7d5a9d314bc0621378d0a_coinminer_cryptolocker_elex_mafia_stealc_tofsee.exe Destination IP 9 223.5.5.5 1848 2026-04-17_dda52b3775c7d5a9d314bc0621378d0a_coinminer_cryptolocker_elex_mafia_stealc_tofsee.exe - Drops file in System32 directory 15 IoCs
description ioc Process File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft b6403c5d File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\57C8EDB95DF3F0AD4EE2DC2B8CFD4157 b6403c5d File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\AAD646CB44373074ADE741C38400E7E1 b6403c5d File created C:\Windows\SysWOW64\b6403c5d 2026-04-17_dda52b3775c7d5a9d314bc0621378d0a_coinminer_cryptolocker_elex_mafia_stealc_tofsee.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE b6403c5d File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies b6403c5d File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5 b6403c5d File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\81B9B36F9ABC4DA631A4713EE66FAEC6_D78A39BE9A7C3823659C09F61E8BD3E8 b6403c5d File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\AAD646CB44373074ADE741C38400E7E1 b6403c5d File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5 b6403c5d File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache b6403c5d File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData b6403c5d File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\57C8EDB95DF3F0AD4EE2DC2B8CFD4157 b6403c5d File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content b6403c5d File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\81B9B36F9ABC4DA631A4713EE66FAEC6_D78A39BE9A7C3823659C09F61E8BD3E8 b6403c5d -
resource yara_rule behavioral2/memory/1848-0-0x0000000000C30000-0x0000000000CB9000-memory.dmp upx behavioral2/files/0x001000000002707c-2.dat upx behavioral2/memory/5008-3-0x0000000000BD0000-0x0000000000C59000-memory.dmp upx behavioral2/memory/1848-10-0x0000000000C30000-0x0000000000CB9000-memory.dmp upx behavioral2/memory/5008-12-0x0000000000BD0000-0x0000000000C59000-memory.dmp upx behavioral2/memory/1848-23-0x0000000000C30000-0x0000000000CB9000-memory.dmp upx behavioral2/memory/5008-24-0x0000000000BD0000-0x0000000000C59000-memory.dmp upx behavioral2/memory/1848-48-0x0000000000C30000-0x0000000000CB9000-memory.dmp upx behavioral2/memory/1848-49-0x0000000000C30000-0x0000000000CB9000-memory.dmp upx - Drops file in Windows directory 2 IoCs
description ioc Process File opened for modification C:\Windows\55bd20 b6403c5d File opened for modification C:\Windows\1fa370 2026-04-17_dda52b3775c7d5a9d314bc0621378d0a_coinminer_cryptolocker_elex_mafia_stealc_tofsee.exe - System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 2026-04-17_dda52b3775c7d5a9d314bc0621378d0a_coinminer_cryptolocker_elex_mafia_stealc_tofsee.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language b6403c5d - Modifies data under HKEY_USERS 9 IoCs
description ioc Process Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:" b6403c5d Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ b6403c5d Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1" b6403c5d Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1" b6403c5d Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix b6403c5d Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:" b6403c5d Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1" b6403c5d Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0" b6403c5d Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing b6403c5d - Suspicious behavior: EnumeratesProcesses 14 IoCs
pid Process 5008 b6403c5d 5008 b6403c5d 5008 b6403c5d 5008 b6403c5d 5008 b6403c5d 5008 b6403c5d 5008 b6403c5d 5008 b6403c5d 1848 2026-04-17_dda52b3775c7d5a9d314bc0621378d0a_coinminer_cryptolocker_elex_mafia_stealc_tofsee.exe 1848 2026-04-17_dda52b3775c7d5a9d314bc0621378d0a_coinminer_cryptolocker_elex_mafia_stealc_tofsee.exe 1848 2026-04-17_dda52b3775c7d5a9d314bc0621378d0a_coinminer_cryptolocker_elex_mafia_stealc_tofsee.exe 1848 2026-04-17_dda52b3775c7d5a9d314bc0621378d0a_coinminer_cryptolocker_elex_mafia_stealc_tofsee.exe 1848 2026-04-17_dda52b3775c7d5a9d314bc0621378d0a_coinminer_cryptolocker_elex_mafia_stealc_tofsee.exe 1848 2026-04-17_dda52b3775c7d5a9d314bc0621378d0a_coinminer_cryptolocker_elex_mafia_stealc_tofsee.exe - Suspicious use of AdjustPrivilegeToken 4 IoCs
description pid Process Token: SeDebugPrivilege 1848 2026-04-17_dda52b3775c7d5a9d314bc0621378d0a_coinminer_cryptolocker_elex_mafia_stealc_tofsee.exe Token: SeTcbPrivilege 1848 2026-04-17_dda52b3775c7d5a9d314bc0621378d0a_coinminer_cryptolocker_elex_mafia_stealc_tofsee.exe Token: SeDebugPrivilege 5008 b6403c5d Token: SeTcbPrivilege 5008 b6403c5d
Processes
-
C:\Users\Admin\AppData\Local\Temp\2026-04-17_dda52b3775c7d5a9d314bc0621378d0a_coinminer_cryptolocker_elex_mafia_stealc_tofsee.exe"C:\Users\Admin\AppData\Local\Temp\2026-04-17_dda52b3775c7d5a9d314bc0621378d0a_coinminer_cryptolocker_elex_mafia_stealc_tofsee.exe"1⤵
- Unexpected DNS network traffic destination
- Drops file in System32 directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1848
-
C:\Windows\Syswow64\b6403c5dC:\Windows\Syswow64\b6403c5d1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:5008
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Windows\SysWOW64\b6403c5d
- Size 768KB
- SHA256 8bdd77fae4be2a099d93716b8b58647dbda12aa62f6bef76c1de7ed89ce98af5
- MD5 5131cc6b9bfc8f5631fadbf2f477809c
- SHA1 864835cd2d1f05864eafc3c74f646644a15302f6
- SHA512 b0640b2c0e648bd18babbc5903b524510f23aaa0780943ceadbdf426b05fe6dffab0ef1dca8a1cc2b740c0ff118f20219a7581c5d100829b85dc0846f438839e
- SSDEEP 12288:1qXUHkUXe39sOkx2LIan5FAQjU/LikGU5rCOTeidT:1jHPOSOkx2LFscU6UQOJdT
- TLSH T19EF47D31E241C036D6A74572C6FA4BBBA5247D25431161CBA7C4BA262FB76D2FA3130F
- MD5 SHA1 SHA512 SSDEEP TLSH