Backdoor

Backdoor:Win32/Bifrose.ES (file analysis)

Malware Removal

The Backdoor:Win32/Bifrose.ES 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:Win32/Bifrose.ES virus can do?

  • Behavioural detection: Executable code extraction – unpacking
  • Sample contains Overlay data
  • Reads data out of its own binary image
  • CAPE extracted potentially suspicious content
  • The binary likely contains encrypted or compressed data.
  • Authenticode signature is invalid
  • CAPE detected the embedded win api malware family
  • Anomalous binary characteristics
  • Yara detections observed in process dumps, payloads or dropped files

How to determine Backdoor:Win32/Bifrose.ES?


File Info:

name: DE9859D69542BFEF5B5B.mlw
path: /opt/CAPEv2/storage/binaries/925637305d5e8eb734efd3ed38c092628d3513cc4836d01125cf62ccd10f673c
crc32: 05127922
md5: de9859d69542bfef5b5b5821efdb1956
sha1: 94a435743ead30729b54a15f3d791d4b3ec8d051
sha256: 925637305d5e8eb734efd3ed38c092628d3513cc4836d01125cf62ccd10f673c
sha512: e280146c76b79368a790419fed764dc502a755adf3b027106b95b5090f6a5da750152a0235dc2bed964f2280812cb3e0a369c81370efa6ec540ee3e227339d71
ssdeep: 3072:x6w+UCejNTYUFrBZHldZUQoBmE9ywzxNXXFs44iFfXyhOZXMVM6hM3FYUFrlOjZI:x6P6fyzB9PtJX74pO1MKXXqdKBykXMlY
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T1592402EE4A85C44AE3FD563170D8C848A61DECF68BBA47FAC1C1F7B9D5FD42096050A2
sha3_384: 36682cc6ff639083aa755e18aa171c7ae325e3e54563e7f7c93d6b586b3749b8b65241c8b4fb32a3c15480249d5571e9
ep_bytes: 558bec83ec4456ff15141040008bf08a
timestamp: 2007-07-24 13:02:46

Version Info:

0: [No Data]

Backdoor:Win32/Bifrose.ES also known as:

BkavW32.AIDetectMalware
LionicTrojan.Win32.Bifrose.lj8w
tehtrisGeneric.Malware
MicroWorld-eScanBackdoor.Bifrose.ZXE
FireEyeGeneric.mg.de9859d69542bfef
SkyhighBehavesLike.Win32.Generic.dc
McAfeeBackDoor-CEP.ak.gen.a
Cylanceunsafe
SangforSuspicious.Win32.Save.a
K7AntiVirusRiskware ( 0040eff71 )
AlibabaBackdoor:Win32/Bifrose.c2dc9fca
K7GWRiskware ( 0040eff71 )
CrowdStrikewin/malicious_confidence_100% (W)
ArcabitBackdoor.Bifrose.ZXE
BitDefenderThetaAI:Packer.9150F90020
SymantecML.Attribute.HighConfidence
Elasticmalicious (high confidence)
ESET-NOD32Win32/Bifrose.NHD
APEXMalicious
ClamAVWin.Trojan.Bifrose-420
KasperskyBackdoor.Win32.Agent.uek
BitDefenderBackdoor.Bifrose.ZXE
NANO-AntivirusTrojan.Win32.Agent.ciqch
AvastWin32:Agent-AAKP [Trj]
TencentMalware.Win32.Gencirc.10b1a144
SophosML/PE-A
BaiduWin32.Backdoor.Bifrose.ac
F-SecureTrojan.TR/Agent.gdzs
DrWebBackDoor.Bifrost.816
VIPREBackdoor.Bifrose.ZXE
TrendMicroTROJ_AGENT.AGY
Trapminemalicious.high.ml.score
EmsisoftBackdoor.Bifrose.ZXE (B)
SentinelOneStatic AI – Malicious PE
JiangminTrojan/Agent.wpy
WebrootW32.Trojan.Gen
GoogleDetected
AviraTR/Agent.gdzs
VaristW32/Trojan.INKG-7127
Antiy-AVLTrojan[Backdoor]/Win32.Agent.uek
KingsoftWin32.Hack.Agent.uek
XcitiumTrojWare.Win32.Agent.~MQ@7p29
MicrosoftBackdoor:Win32/Bifrose.ES
ViRobotBackdoor.Win32.Agent.40349
ZoneAlarmBackdoor.Win32.Agent.uek
GDataBackdoor.Bifrose.ZXE
CynetMalicious (score: 100)
AhnLab-V3Trojan/Win32.CSon.R450
VBA32Backdoor.Agent
ALYacBackdoor.Bifrose.ZXE
MAXmalware (ai score=100)
MalwarebytesGeneric.Malware.AI.DDS
PandaBck/Bifrose.BHP
ZonerTrojan.Win32.36969
TrendMicro-HouseCallTROJ_AGENT.AGY
RisingTrojan.FakeIcon!1.9A3A (CLASSIC)
YandexTrojan.GenAsa!M5CWC9hpa0Q
IkarusTrojan.Win32.Midgare
FortinetW32/Agent.CND!tr
AVGWin32:Agent-AAKP [Trj]
Cybereasonmalicious.43ead3
DeepInstinctMALICIOUS

How to remove Backdoor:Win32/Bifrose.ES?

Backdoor:Win32/Bifrose.ES removal tool
  • 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.

About the author

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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