The TrojanDropper:Win32/Sirefef!B is considered dangerous by lots of security experts. When this infection is active, you may notice unwanted processes in Task Manager list. In this case, it is adviced to scan your computer with GridinSoft Anti-Malware.
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Removing PC viruses manually may take hours and may damage your PC in the process. We recommend using GridinSoft Anti-Malware for virus removal. Allows to complete scan and cure your PC during the trial period.
What TrojanDropper:Win32/Sirefef!B virus can do?
- Behavioural detection: Executable code extraction – unpacking
- Yara rule detections observed from a process memory dump/dropped files/CAPE
- Attempted to write to a harddisk volume
- CAPE extracted potentially suspicious content
- Unconventionial language used in binary resources: Bulgarian
- Authenticode signature is invalid
- Uses Windows utilities for basic functionality
- Behavioural detection: Injection (Process Hollowing)
- Behavioural detection: Injection (inter-process)
- Attempts to identify installed AV products by installation directory
- Creates a copy of itself
- Attempts to interact with an Alternate Data Stream (ADS)
- Anomalous binary characteristics
How to determine TrojanDropper:Win32/Sirefef!B?
File Info:
name: 3EF2943CB595ED0B334B.mlwpath: /opt/CAPEv2/storage/binaries/5207b5ff2f32ccec0e3280713c4a30073b15f60da1740aa7aa87474e5b79f6a0crc32: 5339F21Dmd5: 3ef2943cb595ed0b334bac1bd61aa055sha1: 09ef5a9fcd1f2950752d65623d1b90089eea3357sha256: 5207b5ff2f32ccec0e3280713c4a30073b15f60da1740aa7aa87474e5b79f6a0sha512: 3d82f1b1946bbb598e69578d7324fda4c76c8a77c839bcc1117d13c8e4b6f9c2a7df82a398781db934d9fef6ea7db98f44fedab61451781d7c5ed3388f7388d2ssdeep: 6144:FIo5u0lYLP2/LpJnkiAvo7Vv/Kx5t0mM6w:FIo51lYL+TDnkiAvoZva0ttype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T1CD24017021409E1BC5638F79A9F273C91E4EFCE38A54C65AC5873CBC56222074B6B27Asha3_384: 0afa83550debc3ac43464453ea223fa18b6866a36342418336555208bce93a511d7ef80a6e41a97bed3fad566572fa11ep_bytes: 558bec83e4f883ec3c535657be000010timestamp: 2007-12-22 14:43:52Version Info:
0: [No Data]
TrojanDropper:Win32/Sirefef!B also known as:
| Bkav | W32.AIDetect.malware1 |
| Lionic | Trojan.Win32.Generic.4!c |
| MicroWorld-eScan | Gen:Variant.Sirefef.1247 |
| ClamAV | Win.Trojan.Zaccess-2569 |
| CAT-QuickHeal | TrojanDropper.Sirefef.A9 |
| ALYac | Gen:Variant.Sirefef.1247 |
| Cylance | Unsafe |
| VIPRE | Gen:Variant.Sirefef.1247 |
| Sangfor | Suspicious.Win32.Save.a |
| K7AntiVirus | RootKit ( 0044814a1 ) |
| Alibaba | TrojanDropper:Win32/Sirefef.27c37ea1 |
| K7GW | RootKit ( 0044814a1 ) |
| Cybereason | malicious.cb595e |
| Cyren | W32/Zbot.OW.gen!Eldorado |
| Symantec | ML.Attribute.HighConfidence |
| Elastic | malicious (high confidence) |
| ESET-NOD32 | Win32/Sirefef.FY |
| APEX | Malicious |
| Paloalto | generic.ml |
| Cynet | Malicious (score: 99) |
| Kaspersky | HEUR:Trojan.Win32.Generic |
| BitDefender | Gen:Variant.Sirefef.1247 |
| NANO-Antivirus | Trojan.Win32.ZAccess.crazzp |
| SUPERAntiSpyware | Trojan.Agent/Gen-Sirefef |
| Avast | Win32:CrypterX-gen [Trj] |
| Ad-Aware | Gen:Variant.Sirefef.1247 |
| Emsisoft | Gen:Variant.Sirefef.1247 (B) |
| Comodo | TrojWare.Win32.Kryptik.BQFD@55v62f |
| DrWeb | BackDoor.Maxplus.13106 |
| TrendMicro | TROJ_GEN.R002C0DHA22 |
| McAfee-GW-Edition | ZeroAccess-FEP!3EF2943CB595 |
| Trapmine | malicious.high.ml.score |
| FireEye | Generic.mg.3ef2943cb595ed0b |
| Sophos | ML/PE-A + Mal/EncPk-AKZ |
| SentinelOne | Static AI – Suspicious PE |
| GData | Gen:Variant.Sirefef.1247 |
| Jiangmin | Backdoor/ZAccess.pdz |
| Webroot | W32.Trojan.Gen |
| Avira | HEUR/AGEN.1207384 |
| MAX | malware (ai score=83) |
| Antiy-AVL | Trojan/Generic.ASMalwS.116 |
| Kingsoft | Win32.Hack.ZAccess.el.(kcloud) |
| Microsoft | TrojanDropper:Win32/Sirefef.gen!B |
| Detected | |
| AhnLab-V3 | Trojan/Win32.ZAccess.R86068 |
| McAfee | ZeroAccess-FEP!3EF2943CB595 |
| VBA32 | Backdoor.ZAccess |
| Malwarebytes | Malware.Heuristic.1001 |
| TrendMicro-HouseCall | TROJ_GEN.R002C0DHA22 |
| Rising | Trojan.Generic@AI.98 (RDML:R2kvDgWwli4F1Y+4lPqsTQ) |
| Yandex | Trojan.GenAsa!sFt6dEk8hR0 |
| Ikarus | Trojan-Dropper.Win32.Sirefef |
| MaxSecure | Trojan.Malware.300983.susgen |
| Fortinet | W32/Generic.AC.2230FF!tr |
| BitDefenderTheta | Gen:NN.ZexaF.34592.oyW@aSRL5ajG |
| AVG | Win32:CrypterX-gen [Trj] |
| Panda | Trj/Genetic.gen |
| CrowdStrike | win/malicious_confidence_100% (W) |
How to remove TrojanDropper:Win32/Sirefef!B?
- Download and install GridinSoft Anti-Malware.
- Open GridinSoft Anti-Malware and perform a “Standard scan“.
- “Move to quarantine” all items.
- Open “Tools” tab – Press “Reset Browser Settings“.
- Select proper browser and options – Click “Reset”.
- Restart your computer.
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