Categories: Trojan

Trojan:Win32/Ymacco.AA91 (file analysis)

The Trojan:Win32/Ymacco.AA91 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 Trojan:Win32/Ymacco.AA91 virus can do?

  • Executable code extraction
  • Creates RWX memory
  • Reads data out of its own binary image
  • A process created a hidden window
  • The binary likely contains encrypted or compressed data.
  • Uses Windows utilities for basic functionality
  • Installs itself for autorun at Windows startup
  • Mimics icon used for popular non-executable file format
  • Creates a slightly modified copy of itself

How to determine Trojan:Win32/Ymacco.AA91?


File Info:

crc32: 9CAA1396md5: 9be02f612594c0a6d3e968a08d6f0c1ename: IMG-3798778934432345987789987890-87674.exesha1: b6d621b8da2cbe42d01d413cb7fa1dead0c21917sha256: 91c8f2961875cc9e46f40ea917b6d83c45301926d88bb8a0af857f3caedcf8bcsha512: eb0b5453db9689c174af1f9d8591e0e5a22f5be824edadd83f5e87c692b3b3d3c2ccc6e8f3d7b33beea19b96f484434a5241ca8f450263439e9dfe126441de19ssdeep: 12288:U3N+JFL5L12H5zx5eAS/0YmIIdiNi9vPoDXP5Jwr:U3gvLKZV5eAS/0YzIdCi9XoVJwtype: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Trojan:Win32/Ymacco.AA91 also known as:

Bkav W32.AIDetectVM.malware1
Elastic malicious (high confidence)
MicroWorld-eScan Gen:Variant.Razy.734718
FireEye Generic.mg.9be02f612594c0a6
CAT-QuickHeal Trojan.Multi
ALYac Gen:Variant.Razy.734718
Cylance Unsafe
VIPRE Trojan.Win32.Generic!BT
AegisLab Trojan.Multi.Generic.4!c
Sangfor Malware
K7AntiVirus Trojan ( 0056c5dd1 )
BitDefender Gen:Variant.Razy.734718
K7GW Trojan ( 0056c5dd1 )
Cybereason malicious.12594c
TrendMicro TrojanSpy.Win32.DATACOLLECTORA.USXVPHD20
BitDefenderTheta AI:Packer.5377655D20
Symantec ML.Attribute.HighConfidence
APEX Malicious
Avast Win32:PWSX-gen [Trj]
Kaspersky Trojan.Win32.Injects.tlw
Alibaba Trojan:Win32/Ymacco.0965a79f
Rising Trojan.Crypto!8.364 (CLOUD)
Ad-Aware Gen:Variant.Razy.734718
Comodo TrojWare.Win32.Agent.zvbtg@0
F-Secure Trojan.TR/Crypt.ZPACK.Gen
Invincea heuristic
Sophos Mal/Generic-S
Ikarus Trojan.Inject
Avira TR/Crypt.ZPACK.Gen
Fortinet W32/GenKryptik.EQFJ!tr
Arcabit Trojan.Razy.DB35FE
Microsoft Trojan:Win32/Ymacco.AA91
Cynet Malicious (score: 100)
McAfee RDN/Generic.grp
MAX malware (ai score=84)
VBA32 BScope.Trojan.Wacatac
Malwarebytes Trojan.MalPack
Panda Trj/CI.A
ESET-NOD32 a variant of Win32/Kryptik.HFNA
TrendMicro-HouseCall TrojanSpy.Win32.DATACOLLECTORA.USXVPHD20
Tencent Win32.Trojan.Injects.Hxzs
SentinelOne DFI – Malicious PE
GData Win32.Trojan-Stealer.AgentTesla.MLMKUQ
AVG Win32:PWSX-gen [Trj]
Paloalto generic.ml
CrowdStrike win/malicious_confidence_100% (W)
Qihoo-360 Win32/Trojan.PWS.d75

How to remove Trojan:Win32/Ymacco.AA91?

  • 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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