Categories: Backdoor

What is “Backdoor.TofseePMF.S25821537”?

The Backdoor.TofseePMF.S25821537 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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What Backdoor.TofseePMF.S25821537 virus can do?

  • SetUnhandledExceptionFilter detected (possible anti-debug)
  • Behavioural detection: Executable code extraction – unpacking
  • Executed a command line with /C or /R argument to terminate command shell on completion which can be used to hide execution
  • Yara rule detections observed from a process memory dump/dropped files/CAPE
  • Creates RWX memory
  • Possible date expiration check, exits too soon after checking local time
  • Dynamic (imported) function loading detected
  • Reads data out of its own binary image
  • A process created a hidden window
  • CAPE extracted potentially suspicious content
  • Drops a binary and executes it
  • Unconventionial language used in binary resources: Spanish (Colombia)
  • Authenticode signature is invalid
  • Uses Windows utilities for basic functionality
  • Enumerates services, possibly for anti-virtualization
  • Behavioural detection: Injection (Process Hollowing)
  • Executed a process and injected code into it, probably while unpacking
  • Deletes its original binary from disk
  • Behavioural detection: Injection (inter-process)
  • Installs itself for autorun at Windows startup
  • Installs itself for autorun at Windows startup
  • CAPE detected the Tofsee malware family
  • Attempts to interact with an Alternate Data Stream (ADS)
  • Anomalous binary characteristics
  • Uses suspicious command line tools or Windows utilities

How to determine Backdoor.TofseePMF.S25821537?


File Info:

name: 0B151CCA1B8BD7814E08.mlwpath: /opt/CAPEv2/storage/binaries/50d7355d3eabea2eed4dd8d5d2677042e3f253af5fb7d62c53f9787dd0296e20crc32: 6F4307EFmd5: 0b151cca1b8bd7814e08e381e7bb9829sha1: c1cfa612cc64ec1e649bf69c5500126f099b319bsha256: 50d7355d3eabea2eed4dd8d5d2677042e3f253af5fb7d62c53f9787dd0296e20sha512: f6661857422cf05340b4199bc4aaef815aeb87c17f1d43334e2bd2f1644e8e7bb48a342ce60ca3715adbbb20d8aa0361ec077d3d543002878b8cc0d02e970193ssdeep: 12288:Dbg+pagrP6DU465JPuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu:ZagryUBtype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T15FC69E36213189AFEC3550BCF7AC3B25CAFC47B8F301573E84A9D6E1089569C82D5A5Bsha3_384: 1295d24d41318c996b3ff1ad66547895dc9e75c58a36710f77c43fec0cfbe56ce2d87ca1407186802010e6f14d303d8eep_bytes: 8bff558bece8b6360000e8110000005dtimestamp: 2020-06-26 14:13:41

Version Info:

0: [No Data]

Backdoor.TofseePMF.S25821537 also known as:

Bkav W32.AIDetect.malware2
Elastic malicious (high confidence)
Cynet Malicious (score: 100)
FireEye Generic.mg.0b151cca1b8bd781
CAT-QuickHeal Backdoor.TofseePMF.S25821537
ALYac Gen:Variant.Jaik.49901
Cylance Unsafe
Zillya Trojan.Kryptik.Win32.3660456
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_90% (D)
K7GW Trojan ( 0058bfda1 )
K7AntiVirus Trojan ( 0058bfda1 )
Baidu Win32.Trojan.Kryptik.jm
Cyren W32/Kryptik.FYI.gen!Eldorado
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of Win32/Kryptik.HNSU
APEX Malicious
ClamAV Win.Malware.Sabsik-9916379-0
Kaspersky HEUR:Backdoor.Win32.Tofsee.gen
BitDefender Gen:Variant.Jaik.49901
NANO-Antivirus Trojan.Win32.Stealer.jjkaoi
MicroWorld-eScan Gen:Variant.Jaik.49901
Avast Win32:CrypterX-gen [Trj]
Tencent Backdoor.Win32.Tofsee.16000134
Ad-Aware Gen:Variant.Jaik.49901
Emsisoft Gen:Variant.Jaik.49901 (B)
DrWeb Trojan.PWS.Stealer.31865
McAfee-GW-Edition Packed-GEE!0B151CCA1B8B
Sophos ML/PE-A
Ikarus Trojan.Win32
GData Win32.Trojan.BSE.1R8QSDA
Jiangmin Backdoor.Mokes.exl
Avira TR/Crypt.XPACK.Gen
Antiy-AVL Trojan/Generic.ASMalwS.34F4D02
Microsoft Trojan:Win32/Azorult.RM!MTB
AhnLab-V3 Malware/Win.Generic.R459535
Acronis suspicious
McAfee Packed-GEE!0B151CCA1B8B
MAX malware (ai score=85)
VBA32 BScope.Malware-Cryptor.SmokeSoviet
Malwarebytes Trojan.MalPack.GS
Rising Malware.Obscure/Heur!1.9E03 (CLASSIC)
Yandex Trojan.Kryptik!4506sWxxoaQ
SentinelOne Static AI – Malicious PE
MaxSecure Trojan.Malware.121218.susgen
Fortinet W32/Kryptik.FSC!tr
AVG Win32:CrypterX-gen [Trj]
Panda Trj/GdSda.A

How to remove Backdoor.TofseePMF.S25821537?

  • 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.
Paul Valéry

I'm a cyber security analyst and data science expert with 5+ years of experience with security software contractors.

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