MALICIOUS — FlatOut + fix.exe

MALICIOUS — FlatOut + fix.exe is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (99/100), attributed to the Upantix family. 6 of 55 detection engines flagged it, exhibiting 3 ATT&CK techniques.

Identification

SHA-256: ae0017395f34cf78f7b72c3d63258f93d5ee556c32ce10191714ba770449db35
SHA-1: 6557377958c69587018cb61b4dba1037ac578abb
MD5: 933df345e044564be4e08eee57e1b779
imphash: 24b60c57cc33f3e633431b7ad497fda7
ssdeep: 12288:5wawSwaw1wawSwaw9zJwawSwaw1wawSwaw9zswawSwaw1wawSwaw9zJwawSwaw1u:m
TLSH: T19060D100327A399CD7709F605524598DA22552C1897D3EEA9B03072D3CB78BBB9E8F71
Submitted as: FlatOut + fix.exe
File type: pe · Size: 3524548 bytes
Verdict: malicious (99/100) · Family: Upantix

Detections (6 of 55 engines)

MalwareAnalyser heuristics (entropy/packer): UPX
ClamAV (daily): Win.Malware.Upantix-9886651-0
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 99/100 is the fusion of 8 weighted signals:

ClamAV (daily) flagged Win.Malware.Upantix-9886651-0 (rule Win.Malware.Upantix-9886651-0) - engine signal, weight 0.90, confidence 0.95
Dropped a malicious payload (Upantix): Silent Hill 4(patch).exe - dynamic signal, weight 0.62, confidence 0.90
1 behavioral detection(s): C2: connection to non-standard port [medium] (rule tl-c2-rare-port) - dynamic signal, weight 0.40, confidence 0.90
Contacted 23 external host(s) at runtime (22 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

Dynamic analysis (windows)

1595 behavior events · 0 ATT&CK techniques · 8 dropped files.

Dropped files

C:\Windows\win32dc\Silent Hill 4(patch).exe - 9de75e0d27d8063b5fc2da053bb4166406c7ae26f742eece229caed70ea46a0a
C:\Windows\win32dc\Sims 2_crack.exe - 596df015a29905769d237f3ece0c5d7b4c5ebf6eb9e1f5983ea493f7fa6a4a4c
C:\Windows\win32dc\Doom 3 + trainer.exe - 91a4374ae967e7f9feaf2b7c5be24e42bb33b90b06f9792911feae6fb5fc769e
C:\Windows\win32dc\Doom 3(cdfix).exe - 540bc04d12ed21ea2234a17f3bfe41b29955b1856ee2d288cfbefd6f01edcb17
C:\Windows\win32dc\Quake3_patch.exe - 07a024c3d3d39639b6651299dc03db92cc710559ededf0266109bdbe000693a0
C:\Windows\win32dc\Half-Life 2 cdfix.exe - 888d641958e7c2d2b7c3a020c0954ce1af18ec5126333d1c41a46ba3dc955cc0
C:\Windows\win32dc\Half-Life 2 + cdfix.exe - cfdac88688c586af04c67658419fdf6db337f40c78c6fac38dc90f01efa315d0
C:\Windows\win32dc\DAoC(trainer).exe - 2a99f59b19bb898b801dbbcae08b035bf0a00286a23e0dc9f57f7c4347bb76c8

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=1787648332&P2=404&P3=2&P4=LxAjoKRSa3h%2f0FCoehwSqS6PfwzteblhYcx7unnbAR1aNMJhkFWfblb2fOBOBklG6qN41kZbrCmOMjPAKkShQw%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com
http://203.26.79.13/filestreamingservice//files/45cd9142-6feb-4946-89e7-63e58fada30a/pieceshash?cacheHostOrigin=dl.delivery.mp.microsoft.com
http://203.26.79.13/filestreamingservice/files/45cd9142-6feb-4946-89e7-63e58fada30a?P1=1787648390&P2=404&P3=2&P4=ZwzZzLURJavG8E5V73ZJ0CNS3Hd6cv44DKHpoB3jhafGDnXMAPnKxWpfFMPjX7FjqOkYFr%2fGmYxS2jpJJc7iNw%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com

Embedded domains

us.undernet.org

Embedded IP addresses

4.150.223.111
40.84.85.40
4.230.171.124
74.179.77.204
20.184.175.10
74.179.77.164
20.247.184.197
52.178.17.232
20.231.239.246
52.123.129.14
135.233.45.222
74.178.76.128
52.123.252.232
199.71.214.87
74.178.76.44
52.123.252.229
203.26.79.13
52.148.114.188
52.110.12.47
52.110.12.24
52.110.12.33
52.110.12.50
72.153.5.141

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report