MALICIOUS — fcb7dd804cf936843173760d6cd6ac9e8190b7e4d3a175924db1dc9b550cd0b5

MALICIOUS — fcb7dd804cf936843173760d6cd6ac9e8190b7e4d3a175924db1dc9b550cd0b5 is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (99/100), attributed to the Doina family. 8 of 56 detection engines flagged it, exhibiting 2 ATT&CK techniques.

Identification

• SHA-256: fcb7dd804cf936843173760d6cd6ac9e8190b7e4d3a175924db1dc9b550cd0b5
• SHA-1: e5cfc20f2aee43c710561f1ebe54397c1ca3f48d
• MD5: 43d91efed04cfe1a09037a551357b624
• imphash: 99c27169ecdf0bb12dce110e9380f78a
• ssdeep: 98304:+t+ww48YTRGrjsYrXa1PSELk/GEAUfZ82ub8GRprbGJ1y1xWcdGWLpDi5PdjDJi:+xaELkaUfdOMeXdVlG5Fp+
• TLSH: T18A6712CC1E10A714EAF287557C508D5F4AA3F09DB9BED43C0D8BD49EB261473A422AC9
• Submitted as: fcb7dd804cf936843173760d6cd6ac9e8190b7e4d3a175924db1dc9b550cd0b5
• File type: pe · Size: 6993651 bytes
• Verdict: malicious (99/100) · Family: Doina

Detections (8 of 56 engines)

• YARA: MalwareAnalyser built-in: Packer_UPX_Sections
• MalwareAnalyser heuristics (entropy/packer): high-entropy-sections:.data0
• YARA: JPCERT/CC: JPCERT_HUILoader_PlugX_SideLoad
• YARA: MalwareAnalyser community pack: TL_UPX_Packed
• YARA: Yara-Rules community: YR_AntiDebug_Checks
• Microsoft Defender: Trojan:Win32/Downloader.CF!MTB
• Emsisoft (Emergency Kit): Gen:Variant.Doina.23645
• Kaspersky (KVRT): VHO:Trojan.Win32.Exnet.gen

MITRE ATT&CK

• T1057
• T1105

YARA

• Packer_UPX_Sections

Why this verdict

The malicious score of 99/100 is the fusion of 15 weighted signals:

• Microsoft Defender flagged Trojan:Win32/Downloader.CF!MTB (rule Trojan:Win32/Downloader.CF!MTB) - engine signal, weight 0.55, confidence 0.85
• Emsisoft (Emergency Kit) flagged Gen:Variant.Doina.23645 (rule Gen:Variant.Doina.23645) - engine signal, weight 0.55, confidence 0.85
• Kaspersky (KVRT) flagged VHO:Trojan.Win32.Exnet.gen (rule VHO:Trojan.Win32.Exnet.gen) - engine signal, weight 0.55, confidence 0.85
• YARA: JPCERT/CC flagged JPCERT_HUILoader_PlugX_SideLoad (rule JPCERT_HUILoader_PlugX_SideLoad) - engine signal, weight 0.60, confidence 0.70
• UPX packer section names (rule Packer_UPX_Sections) - yara signal, weight 0.40, confidence 0.90
• Contacted 2 external host(s) and 20 HTTP request(s) at runtime - network signal, weight 0.40, confidence 0.80
• YARA: Yara-Rules community flagged YR_AntiDebug_Checks (rule YR_AntiDebug_Checks) - engine signal, weight 0.35, confidence 0.70
• YARA: MalwareAnalyser built-in flagged Packer_UPX_Sections (rule Packer_UPX_Sections) - engine signal, weight 0.35, confidence 0.70
• MalwareAnalyser heuristics (entropy/packer) flagged high-entropy-sections:.data0 (rule high-entropy-sections:.data0) - engine signal, weight 0.35, confidence 0.70
• YARA: MalwareAnalyser community pack flagged TL_UPX_Packed (rule TL_UPX_Packed) - engine signal, weight 0.30, confidence 0.70
• Embedded network infrastructure: https://secure.comodo.net/CPS0A - static signal, weight 0.35, confidence 0.60
• Packing/obfuscation: high-entropy-sections:.data0 - static signal, weight 0.25, confidence 0.55
• 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
• 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)

223 behavior events · 0 ATT&CK techniques · 5 dropped files.

Runtime network

• www.msftconnecttest.com
• rb.symcd.com
• rb.symcb.com
• inference.location.live.net
• c.pki.goog
• x2.c.lencr.org
• ye.c.lencr.org
• yr.c.lencr.org
• ctldl.windowsupdate.com
• update.googleapis.com
• desktop-hsgcbep
• login.live.com
• v20.events.data.microsoft.com
• config.edge.skype.com
• windows.msn.com
• officeclient.microsoft.com
• www.msn.com
• odc.officeapps.live.com
• settings-win.data.microsoft.com
• assets.msn.com

Dropped files

• C:\Users\analyst\AppData\Local\Temp\cfg.ini - edfcf15cf13bd573d65e5bc1f0ece8c4e583c4e7bf2c2f3923c8607d1a4de698
• C:\Users\analyst\AppData\Local\Temp\msedge_installer.log - 1b51041f8085d0ebd1398f4512718ea8209893ca9f1c64bdf530e0cacf0f6eee
• C:\Users\analyst\AppData\Local\Temp\cv_debug.log - 624ff0124ff1097c61c11a6f0265e516a900cc1aafb44110142df0f8f1aaf69a
• C:\Users\analyst\AppData\Local\Temp\tsk_40u9aNMR.exe - beb1af624c132256741c1301a2335f57bd01455c64dbd4489258613864477f5b
• C:\Users\analyst\AppData\Local\Temp\wmsetup.log - b11630055c84537e8859368be34c50cda8d82b8db9a15082ef95f4fd68c7b155

Embedded URLs

• http://crl.thawte.com/ThawteTimestampingCA.crl0
• http://ts-aia.ws.symantec.com/tss-ca-g2.cer0
• http://ts-crl.ws.symantec.com/tss-ca-g2.crl0
• https://secure.comodo.net/CPS0A
• 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
• http://x2.c.lencr.org/
• http://ye.c.lencr.org/
• http://c.pki.goog/wr2/9UVbN0w5E6Y.crl
• http://yr.c.lencr.org/
• http://c.pki.goog/r/gsr1.crl
• http://c.pki.goog/r/r4.crl

Embedded domains

• www.qq.com
• 3x.ca
• k.tw
• crl.thawte.com
• crl.usertrust.com
• ts-aia.ws.symantec.com
• ts-crl.ws.symantec.com
• crt.usertrust.com
• secure.comodo.net
• crl.comodoca.com
• crt.comodoca.com
• x1.c.lencr.org
• x2.c.lencr.org
• ye.c.lencr.org
• yr.c.lencr.org

Embedded IP addresses

• 20.42.65.91
• 4.230.171.124
• 4.247.188.224
• 4.144.132.223
• 20.165.94.63
• 52.230.60.54
• 74.178.76.54
• 20.184.175.21
• 20.184.175.22
• 52.110.12.24
• 52.110.12.2
• 52.123.252.223
• 172.64.154.167
• 20.42.65.90
• 72.153.5.60
• 52.148.114.188
• 4.150.223.97
• 52.110.12.50
• 52.110.12.54

File paths

• X:\:h:l:p:t:x:
• m:\tf\0I0.log
• M:\src\04F\_SHW_CF_181213\SWH_DLL_01\HookDll\Release\HookDll.pdb
• T:\:d:l:t:
• U:\:s:}:
• T:\:t:
• e:\i+

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report