MALICIOUS — FlatOut + serial.exe
MALICIOUS — FlatOut + serial.exe is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (97/100), attributed to the HUILoader family. 6 of 55 detection engines flagged it, exhibiting 2 ATT&CK techniques.
Identification
- SHA-256:
904c0be5c149e55d6a00704d685df741582d0caedf0761fa71e48f6778b5b010 - SHA-1:
234f5f47dc3dbcc2e6d2b15b30842644e54ce2db - MD5:
63060f806dd1c83df0861b6cec1b6f96 - imphash:
24b60c57cc33f3e633431b7ad497fda7 - ssdeep:
1536:3UUUUUUUUUUHdTD+vvvvvvvvvh+UUUUUUUC9mIkkkkkkTyhhhhhhhMSTZM+9m2Od:blN9RkkkkkkTLSBvyJt - TLSH:
T1413BD040717A388CCB345F611924994C616552C2CA7C3D9B9B030B2D3D778BBB9E8EB6 - Submitted as: FlatOut + serial.exe
- File type: pe · Size: 104557 bytes
- Verdict: malicious (97/100) · Family: HUILoader
Detections (6 of 55 engines)
- MalwareAnalyser heuristics (entropy/packer): UPX
- ClamAV (daily): Win.Trojan.Generic-9908425-0
- YARA: JPCERT/CC: JPCERT_HUILoader_PlugX_SideLoad
- Detect It Easy (packer/type): DIE:Turbo Linker
- Microsoft Defender: Trojan:Win32/Upantix.GM!MTB
- Kaspersky (KVRT): HEUR:Packed.Win32.Upantix.gen
MITRE ATT&CK
Why this verdict
The malicious score of 97/100 is the fusion of 7 weighted signals:
- ClamAV (daily) flagged Win.Trojan.Generic-9908425-0 (rule
Win.Trojan.Generic-9908425-0) - engine signal, weight 0.90, confidence 0.95 - Contacted 20 external host(s) at runtime (21 HTTP) - network signal, weight 0.40, confidence 0.80
- YARA: JPCERT/CC flagged JPCERT_HUILoader_PlugX_SideLoad (rule
JPCERT_HUILoader_PlugX_SideLoad) - engine signal, weight 0.35, confidence 0.70 - Detect It Easy (packer/type) flagged DIE:Turbo Linker (rule
DIE:Turbo Linker) - engine signal, weight 0.35, confidence 0.70 - communicate over HTTP (rule
communicate over HTTP) - capa signal, weight 0.30, confidence 0.60 - Packing/obfuscation: UPX, high-entropy-sections:UPX1, Turbo Linker - static signal, weight 0.25, confidence 0.55
- Dropped 8 executable file(s) at runtime - dynamic signal, weight 0.20, confidence 0.60
Dynamic analysis (windows)
229 behavior events · 0 ATT&CK techniques · 8 dropped files.
Runtime network
- www.msftconnecttest.com
- rb.symcd.com
- rb.symcb.com
- inference.location.live.net
- to-do.office.com
- staging.to-do.officeppe.com
- teams.cloud.microsoft
- outlook.office.com
- outlook.office365.com
- outlook.cloud.microsoft
- ctldl.windowsupdate.com
- login.live.com
- ocsp.digicert.com
- desktop-hsgcbep
- v20.events.data.microsoft.com
- config.edge.skype.com
- windows.msn.com
- oneocsp.microsoft.com
- www.msn.com
- settings-win.data.microsoft.com
Dropped files
- C:\Windows\win32dc\FlatOut(cdfix).exe -
1c4e05a0d219253f26f12901d50ad31bdb33dd15b4cc254de109cd602a956ebf - C:\Windows\win32dc\DAoC(nocd).exe -
bbb3fd3d3be7e1960b2112dd39a705175a1bcdd22811cdedb23df76022617144 - C:\Windows\win32dc\UT2004_codes.exe -
f143e6f41127a226783f9d983e7146e0ee9f7feae03ad75adc6f4178daa92606 - C:\Windows\win32dc\Counter-Strike + cdfix.exe -
5d350ab1c319099ad69e96897d01be021d3b5154553ce3ce18674e70e01131cd - C:\Windows\win32dc\Sims 2(patch).exe -
1466cf7eb710aa56d49d62b9c89abdf5e8f25c5861b9b9961114c72f712b01c8 - C:\Windows\win32dc\Silent Hill 4(nocd).exe -
53a2ae89ec34c1dc50ed994d34586d420314771b65e56ef297e02bd7ce29f673 - C:\Windows\win32dc\FlatOut_serial.exe -
65eac8baa118e7ab0fdf860318e82a428d5bb897fb3ebe84caf5393c0238d31d - C:\Windows\win32dc\Sims 2_serial.exe -
a3f03d4ef8789c3148ed169a6c459271fe8e4c94599b20e8ff80f6748f48afb7
Embedded URLs
- http://www.msftconnecttest.com/connecttest.txt
- http://rb.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTDRSYViRCZTxmZjLENmnwVjLly9QQU1MAGIknrOUvdk%2BJcobhHdglyA1gCEF0QyxjrOnkAh4OrdHf50xk%3D
- http://rb.symcb.com/rb.crl
- http://203.26.79.13/filestreamingservice//files/753bb2df-a166-494f-aa7d-5678b1ef0c56/pieceshash?cacheHostOrigin=dl.delivery.mp.microsoft.com
- http://203.26.79.13/filestreamingservice/files/753bb2df-a166-494f-aa7d-5678b1ef0c56?P1=1787662161&P2=404&P3=2&P4=JPk55KnCzIO0vuho8KkUtwwHoD16ZXWejsn7LF2sCE2iPNbgc84CChkJNr23my%2fhNVwcm8WnDWjnxlGRnoKZkA%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com
- http://203.26.79.13/filestreamingservice//files/c74a5353-3e6a-42b7-94d6-9b96c560c89a/pieceshash?cacheHostOrigin=dl.delivery.mp.microsoft.com
- http://203.26.79.13/filestreamingservice/files/c74a5353-3e6a-42b7-94d6-9b96c560c89a?P1=1787662238&P2=404&P3=2&P4=a1FHSHjWToLoiuqNv%2b1u%2fYbB4p%2fY67l6ddygpE3SW6axWYDXHicXn49CuSd5hcNO2n2b%2bv4YTgpvV%2bQHS5D8Vg%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com
Embedded IP addresses
- 72.145.35.96
- 4.150.223.96
- 52.123.252.244
- 57.154.63.210
- 4.230.171.124
- 20.247.185.124
- 135.232.92.137
- 135.233.95.135
- 20.50.201.201
- 20.231.239.246
- 52.123.128.14
- 135.233.45.222
- 203.26.79.13
- 52.148.114.188
- 52.123.252.243
- 74.179.71.159
- 135.233.45.223
- 72.153.5.133
- 52.110.12.38
- 52.110.12.46
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Analyzed on MalwareAnalyzer by Cyble · Open interactive report