MALICIOUS — fc8d3d828dc0c8fcfe61264838069b97bf03cc4145edd81a1ecfc13a1b891550
MALICIOUS — fc8d3d828dc0c8fcfe61264838069b97bf03cc4145edd81a1ecfc13a1b891550 is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (99/100), attributed to the Vobfus family. 4 of 55 detection engines flagged it, exhibiting 5 ATT&CK techniques.
Identification
- SHA-256:
fc8d3d828dc0c8fcfe61264838069b97bf03cc4145edd81a1ecfc13a1b891550 - SHA-1:
1770d5d2c801658d05def6b948b0a5021dd3e1ee - MD5:
fa74ebe04178f242645a6e8bfc6dd3e8 - imphash:
e10b385d3760c25155223c1cd06e914f - ssdeep:
1536:1xvnGcp/BYZ4/2nDxHnSh/2BIr7fbmKBKpKrKAKcSufH:LnGcppt2BIr7DmKBKpKrKAK0H - TLSH:
T14838744755078888D0F6D5AF0D9B3F8E15CE6A04CBBB047C1EEE060E55825B3D228EAD - Submitted as: fc8d3d828dc0c8fcfe61264838069b97bf03cc4145edd81a1ecfc13a1b891550
- File type: pe · Size: 77824 bytes
- Verdict: malicious (99/100) · Family: Vobfus
Detections (4 of 55 engines)
- ClamAV (daily): Win.Worm.Vobfus-7460240-0
- Microsoft Defender: Worm:Win32/Vobfus.AC
- Emsisoft (Emergency Kit): Gen:Trojan.Chinky.2
- Kaspersky (KVRT): Worm.Win32.VBNA.btnv
MITRE ATT&CK
Why this verdict
The malicious score of 99/100 is the fusion of 10 weighted signals:
- ClamAV (daily) flagged Win.Worm.Vobfus-7460240-0 (rule
Win.Worm.Vobfus-7460240-0) - engine signal, weight 0.90, confidence 0.95 - 1 behavioral detection(s): Registry Run Key Persistence [high] (rule
tl-run-key) - dynamic signal, weight 0.60, confidence 0.90 - Memory forensics: 2 finding(s), e.g. SSDT hook (rule
windows.ssdt.SSDT) - memory signal, weight 0.50, confidence 0.85 - Observed at runtime: Registry Run Key Persistence (T1547.001) (rule
Registry Run Key Persistence) - dynamic signal, weight 0.40, confidence 0.90 - Observed at runtime: Windows Service (T1543.003) (rule
Windows Service) - dynamic signal, weight 0.40, confidence 0.90 - Contacted 25 external host(s) at runtime (22 HTTP) - network signal, weight 0.40, confidence 0.80
- Anti-analysis: T1082, T1622, T1497.001 - dynamic signal, weight 0.40, confidence 0.75
- enumerate processes (rule
enumerate processes) - capa signal, weight 0.20, confidence 0.60 - Dropped 1 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)
51867 behavior events · 3 ATT&CK techniques · 4 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
- ns4.thepicturehut.net
- 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
Dropped files
- C:\Users\analyst\kaaaj.exe -
5b94469f91321bd8e885c8a65a95b0457cf8425b0d02e0b29ccbaf4b67c6cec6 - 33a8b115bdf8781dabb9324c056201048e6e42f15b3b118ba9cc95a9b5778f3d -
33a8b115bdf8781dabb9324c056201048e6e42f15b3b118ba9cc95a9b5778f3d - b74c3b20a54b587ddf04bb266d7c46e09d960de0b1116d42ed379173d87cd1dd -
b74c3b20a54b587ddf04bb266d7c46e09d960de0b1116d42ed379173d87cd1dd - 678a1657d3c6227dac4b90839087ecb60d0d8d4b1da4cdf4606e39686781720f -
678a1657d3c6227dac4b90839087ecb60d0d8d4b1da4cdf4606e39686781720f
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=1787843451&P2=404&P3=2&P4=ZbrQPt8SBjMQQuIA60UVEywTCfn%2fCNJ%2bOn2dTKp%2fwLe%2bVLca6CqFyWneJj9edM9tIrZhSRuVWDmrUSzJoqiD3A%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=1787843567&P2=404&P3=2&P4=bMfWd07%2blvoORuXADYgpfnNYuVDJlp37g6LdTUUH558cg%2fdT5nxV9FPmquo6rYLeZUH1q83ut5S%2fx1VaWePJlw%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com
Embedded domains
- ns4.thepicturehut.net
Embedded IP addresses
- 51.116.253.169
- 52.123.252.192
- 172.215.188.232
- 4.230.171.124
- 20.247.184.142
- 52.123.252.246
- 20.165.94.63
- 74.179.77.164
- 51.132.193.104
- 52.182.141.63
- 20.112.250.133
- 52.123.128.14
- 40.99.134.18
- 172.66.2.5
- 52.123.129.14
- 203.26.79.13
- 172.178.240.161
- 52.123.252.202
- 135.232.92.34
- 52.148.114.188
- 92.223.78.30
- 135.234.160.246
- 72.153.5.130
- 52.110.12.11
- 52.110.12.4
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Analyzed on MalwareAnalyzer by Cyble · Open interactive report