MALICIOUS — 4c755089f576eb09cf43aeb039632617f8479f704cd6b986ba5ff17d2acaa2fa

MALICIOUS — 4c755089f576eb09cf43aeb039632617f8479f704cd6b986ba5ff17d2acaa2fa is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (100/100), attributed to the Vobfus family. 5 of 56 detection engines flagged it, exhibiting 4 ATT&CK techniques.

Identification

SHA-256: 4c755089f576eb09cf43aeb039632617f8479f704cd6b986ba5ff17d2acaa2fa
SHA-1: fa05a1f3282c5760db9528981703ade946d171d8
MD5: 5bb0b6570e89a1bb5e9b2ab97534ffbc
imphash: dd45386f60a5c83609c35018df8176ea
ssdeep: 1536:0uXIDTp3+hBIEB70q+DQfDfDfGf+r7gRaID7fbogYAOt:In5sIVDYFcogYAo
TLSH: T1763DEBE09950D85CE04FF60E8DD2588EAE8CDD42761BA85D177DB30FA64B03394668EC
Submitted as: 4c755089f576eb09cf43aeb039632617f8479f704cd6b986ba5ff17d2acaa2fa
File type: pe · Size: 125952 bytes
Verdict: malicious (100/100) · Family: Vobfus

Detections (5 of 56 engines)

ClamAV (daily): Win.Trojan.VB-1140
Microsoft Defender: Worm:Win32/Vobfus.U
Emsisoft (Emergency Kit): Trojan.VB.OEH
Trellix Stinger (McAfee): Downloader-CJX.gen.f
Kaspersky (KVRT): Worm.Win32.VBNA.akkf

MITRE ATT&CK

Why this verdict

The malicious score of 100/100 is the fusion of 13 weighted signals:

ClamAV (daily) flagged Win.Trojan.VB-1140 (rule Win.Trojan.VB-1140) - engine signal, weight 0.90, confidence 0.95
1 behavioral detection(s) across 1 rule(s): Registry Run Key Persistence [high] (rule tl-run-key) - dynamic signal, weight 0.60, confidence 0.90
Microsoft Defender flagged Worm:Win32/Vobfus.U (rule Worm:Win32/Vobfus.U) - engine signal, weight 0.55, confidence 0.85
Emsisoft (Emergency Kit) flagged Trojan.VB.OEH (rule Trojan.VB.OEH) - engine signal, weight 0.55, confidence 0.85
Trellix Stinger (McAfee) flagged Downloader-CJX.gen.f (rule Downloader-CJX.gen.f) - engine signal, weight 0.55, confidence 0.85
Kaspersky (KVRT) flagged Worm.Win32.VBNA.akkf (rule Worm.Win32.VBNA.akkf) - engine signal, weight 0.55, 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 2 external host(s) and 7 HTTP request(s) at runtime - network signal, weight 0.40, confidence 0.80
Anti-analysis: T1497.001, T1082, T1622 - dynamic signal, weight 0.40, confidence 0.75
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
Memory forensics: 2 finding(s) elsewhere in the guest, not attributed to this sample, e.g. SSDT hook (rule windows.ssdt.SSDT) - memory signal, weight 0.05, confidence 0.30

Dynamic analysis (windows)

26773 behavior events · 3 ATT&CK techniques · 3 dropped files.

Dropped files

C:\Users\analyst\younah.exe - 6dd556c7f3d312cb4d7317054df6ce9e2aecc53ac5546f45f82cf4ec482b1aa0
1331ee6e0636a20ff8186f4639c14011556e7b315f4932cc6fbc90c993cc699a - 1331ee6e0636a20ff8186f4639c14011556e7b315f4932cc6fbc90c993cc699a
b3be507bc382310e01fce6a48aa60baf531ab8978df88ae77ee3b88dc135582a - b3be507bc382310e01fce6a48aa60baf531ab8978df88ae77ee3b88dc135582a

Embedded URLs

http://www.msftconnecttest.com/connecttest.txt
http://rb.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTDRSYViRCZTxmZjLENmnwVjLly9QQU1MAGIknrOUvdk%2BJcobhHdglyA1gCEF0QyxjrOnkAh4OrdHf50xk%3D
http://rb.symcb.com/rb.crl
http://c.pki.goog/r/r1.crl

Embedded domains

ns1.thepicturehut.net
x1.c.lencr.org
x2.c.lencr.org

Embedded IP addresses

4.150.223.113
52.123.252.248
20.247.184.197
4.230.171.124
135.234.160.245
4.247.188.224
52.110.12.42
52.110.12.2
40.84.97.4
52.110.12.45
52.148.114.188
72.153.5.61
52.110.12.54

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report