MALICIOUS — crypto.dll

MALICIOUS — crypto.dll is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (98/100), attributed to the Somhoveran family. 6 of 55 detection engines flagged it, exhibiting 3 ATT&CK techniques.

Identification

SHA-256: c5f71d569e4cbd5002b26a2ead44f9566115a870b98f2ff9013469b4b5109062
SHA-1: d182148582ba11b28207bb94d0c0d1cc0d2c075e
MD5: 3081cea72887cb40fe4c966480a6edb2
imphash: e60d0e6577962a1096407913ed128742
ssdeep: 3072:IyrN/sVywaEj1UsEOBYJwyrN/sVywaEj1UsmxtB6+sj/a/NgNIXckvyD/6:Nh9wv1Ut3nh9wv1UZx3632iNIfvAy
TLSH: T1BD3F020B391684F8D4E7BD645C2AD29EB8664F1C48309EC058039BAF6009F6799E4FDC
Submitted as: crypto.dll
File type: pe · Size: 159744 bytes
Verdict: malicious (98/100) · Family: Somhoveran

Detections (6 of 55 engines)

MalwareAnalyser heuristics (entropy/packer): UPX
ClamAV (daily): Win.Ransomware.Somhoveran-9870372-0
Detect It Easy (packer/type): DIE:Turbo Linker
Microsoft Defender: Trojan:Win32/Vindor!pz
Emsisoft (Emergency Kit): Gen:Trojan.ShellHook.jmJfa4pdRVd
Kaspersky (KVRT): Worm.Win32.Wenper.b

MITRE ATT&CK

Why this verdict

The malicious score of 98/100 is the fusion of 8 weighted signals:

ClamAV (daily) flagged Win.Ransomware.Somhoveran-9870372-0 (rule Win.Ransomware.Somhoveran-9870372-0) - engine signal, weight 0.90, confidence 0.95
Observed at runtime: Windows Service (T1543.003) (rule Windows Service) - dynamic signal, weight 0.40, confidence 0.90
1 behavioral detection(s): Windows Service Installation [medium] (rule tl-service-install) - dynamic signal, weight 0.40, confidence 0.90
Contacted 20 external host(s) at runtime (16 HTTP) - network signal, weight 0.40, confidence 0.80
Detect It Easy (packer/type) flagged DIE:Turbo Linker (rule DIE:Turbo Linker) - engine signal, weight 0.35, confidence 0.70
Packing/obfuscation: UPX, high-entropy-sections:UPX1, Turbo Linker - static signal, weight 0.25, confidence 0.55
Dropped 3 executable file(s) at runtime - dynamic signal, weight 0.20, confidence 0.60
Observed at runtime: Modify Registry (T1112) (rule Modify Registry) - dynamic signal, weight 0.12, confidence 0.90

Dynamic analysis (windows)

309 behavior events · 2 ATT&CK techniques · 4 dropped files.

Dropped files

C:\Windows\System32\wlogon.dll - 46a282ba8e76eaa6159c7ace80c1d9437a29cdd79fc9d98b5e2aab258fee15d4
C:\Windows\System32\crypto.dll - c418d090763efe95a7691aa8979b7e05ece5ef43733bbd5e6b0a78b81552eecb
C:\Windows\System32\net.cpl - 4950f123ce6a4499c6d9b87e90bf3a229018004c1f07b10083f28033258860b9
C:\Windows\System32\lcss.exe - 392f092c9bcaa306a4ba595a30d5dcf8ceead3eb6db497306eaa662738688d2e

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=1787650384&P2=404&P3=2&P4=d1iejO3QXGAVYldm64xakZKsroEgw54LBgg%2fp7C%2fDCHEozwMEWwYjl2AFhCpfwuMxR0%2b%2fx0baJQpHlqSQbWigw%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com

Embedded IP addresses

135.233.95.80
52.168.117.170
4.144.132.223
57.154.63.210
4.230.171.124
52.253.84.76
135.232.92.137
40.79.163.155
135.232.92.97
20.231.239.246
52.123.128.14
92.223.78.30
20.42.73.31
172.178.240.163
52.123.252.240
203.26.79.13
52.148.114.188
52.110.12.51
72.145.35.107
52.110.12.40

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report