MALICIOUS — unpacked_.safe
MALICIOUS — unpacked_.safe is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (98/100), attributed to the Cutwail family. 7 of 51 detection engines flagged it, exhibiting 3 ATT&CK techniques.
Identification
- SHA-256:
8450d4fb93d45757950c2a65245c877b0116c6f696b0fbfd93814326edbe914e - SHA-1:
94d74795ccdb1a7e81f12037a748d806da70b1b4 - MD5:
d5d09f257f4752e885140de25594d53b - imphash:
3c34ff5c9ca1631e3dc6fc8094843cc1 - ssdeep:
768:zB2wuRjtuW5aYMt+XGYYI+ccPvFhBtqmRwptVVUvvewUTJy5dxbZos:4jg/3y+cKFvwp5MefJ03bZo - TLSH:
T1543A6B63F4218F18C4416A736ACB401D1F522A28ABF954A435C6FD3D1A96C1F349FE63 - Submitted as: unpacked_.safe
- File type: pe · Size: 98304 bytes
- Verdict: malicious (98/100) · Family: Cutwail
Detections (7 of 51 engines)
- YARA: MalwareAnalyser built-in: Windows_Injection_Api_Combo
- MalwareAnalyser heuristics (entropy/packer): high-entropy-sections:DATA
- YARA: JPCERT/CC: JPCERT_HUILoader_PlugX_SideLoad
- YARA: MalwareAnalyser community pack: TL_Shellcode_VirtualAlloc_Exec
- Detect It Easy (packer/type): DIE:Microsoft Linker
- Microsoft Defender: TrojanDownloader:Win32/Cutwail.gen!C
- Emsisoft (Emergency Kit): Dump:Trojan.Kobka.E
MITRE ATT&CK
YARA
- Windows_Injection_Api_Combo
Why this verdict
The malicious score of 98/100 is the fusion of 10 weighted signals:
- Process injection API combination (rule
Windows_Injection_Api_Combo) - yara signal, weight 0.65, confidence 0.90 - Microsoft Defender flagged TrojanDownloader:Win32/Cutwail.gen!C (rule
TrojanDownloader:Win32/Cutwail.gen!C) - engine signal, weight 0.55, confidence 0.85 - Emsisoft (Emergency Kit) flagged Dump:Trojan.Kobka.E (rule
Dump:Trojan.Kobka.E) - engine signal, weight 0.55, confidence 0.85 - Contacted 23 external host(s) at runtime (2 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 - YARA: MalwareAnalyser community pack flagged TL_Shellcode_VirtualAlloc_Exec (rule
TL_Shellcode_VirtualAlloc_Exec) - engine signal, weight 0.35, confidence 0.70 - Detect It Easy (packer/type) flagged DIE:Microsoft Linker (rule
DIE:Microsoft Linker) - engine signal, weight 0.35, confidence 0.70 - persist via registry run key (rule
persist via registry run key) - capa signal, weight 0.35, confidence 0.60 - Packing/obfuscation: high-entropy-sections:DATA, Microsoft Linker - static signal, weight 0.25, confidence 0.55
- Observed at runtime: Modify Registry (T1112) (rule
Modify Registry) - dynamic signal, weight 0.12, confidence 0.90
Dynamic analysis (windows)
17 behavior events · 1 ATT&CK techniques · 0 dropped files.
Runtime network
- www.msftconnecttest.com
- inference.location.live.net
- v10.events.data.microsoft.com
- settings-win.data.microsoft.com
- login.live.com
- desktop-hsgcbep
- v20.events.data.microsoft.com
- fd.api.iris.microsoft.com
- config.edge.skype.com
- windows.msn.com
- www.msn.com
- officeclient.microsoft.com
- odc.officeapps.live.com
- assets.msn.com
- licensing.mp.microsoft.com
- tsfe.trafficshaping.dsp.mp.microsoft.com
- watson.events.data.microsoft.com
- www.bing.com
- http://www.msftconnecttest.com/connecttest.txt
- www.msftconnecttest.com/connecttest.txt
Embedded URLs
- http://www.msftconnecttest.com/connecttest.txt
Embedded domains
- inference.location.live.net
Embedded IP addresses
- 23.40.52.209
- 4.150.223.107
- 20.42.179.192
- 4.150.223.105
- 150.171.22.17
- 40.126.14.160
- 4.230.171.124
- 85.210.196.11
- 4.144.132.223
- 72.154.7.248
- 135.233.45.222
- 172.178.240.163
- 23.40.52.211
- 23.33.238.114
- 172.215.188.232
- 23.33.238.112
- 23.33.238.171
- 23.33.238.207
- 52.110.12.20
- 74.226.60.120
- 23.198.40.44
- 23.33.238.178
- 52.110.12.38
File paths
- f:\programs\revolution6\preloader\objfre_wxp_x86\i386\PreLoader.pdb
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Analyzed on MalwareAnalyzer by Cyble · Open interactive report