Joe Sandbox Cloud Basic Analysis Report

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Windows Analysis Report
KOYCdGz80D.exe

Overview

General Information

Sample Name:KOYCdGz80D.exe
Original Sample Name:d09f787a952a6e946656ac9184768fbe.exe
Analysis ID:826246
MD5:d09f787a952a6e946656ac9184768fbe
SHA1:c3c3cbad8d40c7ba332c2b6d7ae0464d092c0877
SHA256:8cd071a056f555c793b95c82f9eff1fcf60e304a1e9589988e9819f27a754256
Tags:2502557713exeGoziISFBUrsnif
Infos:

Detection

Ursnif
Score:100
Range:0 - 100
Whitelisted:false
Confidence:100%

Signatures

Multi AV Scanner detection for submitted file
Detected unpacking (changes PE section rights)
Antivirus detection for URL or domain
Malicious sample detected (through community Yara rule)
Detected unpacking (overwrites its own PE header)
Snort IDS alert for network traffic
Yara detected Ursnif
Found evasive API chain (may stop execution after checking system information)
Writes or reads registry keys via WMI
Writes registry values via WMI
Found API chain indicative of debugger detection
Machine Learning detection for sample
Creates a DirectInput object (often for capturing keystrokes)
Uses 32bit PE files
Yara signature match
Antivirus or Machine Learning detection for unpacked file
Contains functionality to query locales information (e.g. system language)
Contains functionality to read the PEB
Uses a known web browser user agent for HTTP communication
May sleep (evasive loops) to hinder dynamic analysis
Uses code obfuscation techniques (call, push, ret)
Internet Provider seen in connection with other malware
Detected potential crypto function
Contains functionality to call native functions
Tries to resolve domain names, but no domain seems valid (expired dropper behavior)
Contains functionality to dynamically determine API calls

Classification

Process Tree

  • System is w10x64
  • KOYCdGz80D.exe (PID: 5348 cmdline: C:\Users\user\Desktop\KOYCdGz80D.exe MD5: D09F787A952A6E946656AC9184768FBE)
  • cleanup

Malware Threat Intel

Provided by

NameDescriptionAttributionBlogpost URLsLink
Gozi, Ursnif2000 Ursnif aka Snifula2006 Gozi v1.0, Gozi CRM, CRM, Papras2010 Gozi v2.0, Gozi ISFB, ISFB, Pandemyia(*)-> 2010 Gozi Prinimalka -> Vawtrak/NeverquestIn 2006, Gozi v1.0 ('Gozi CRM' aka 'CRM') aka Papras was first observed.It was offered as a CaaS, known as 76Service. This first version of Gozi was developed by Nikita Kurmin, and he borrowed code from Ursnif aka Snifula, a spyware developed by Alexey Ivanov around 2000, and some other kits. Gozi v1.0 thus had a formgrabber module and often is classified as Ursnif aka Snifula.In September 2010, the source code of a particular Gozi CRM dll version was leaked, which led to Vawtrak/Neverquest (in combination with Pony) via Gozi Prinimalka (a slightly modified Gozi v1.0) and Gozi v2.0 (aka 'Gozi ISFB' aka 'ISFB' aka Pandemyia). This version came with a webinject module.No Attributionhttps://malpedia.caad.fkie.fraunhofer.de/details/win.gozi

Malware Configuration

Threatname: Ursnif

{"RSA Public Key": "2cHitNE2khtX8MPowN3OuEF+nIJiRQvDS0CByWczHAmlx7InAyPYhqz4W4BdwOQhPXM+cNmTKZrjXkeaD1W/JReU+0QfnRaZLQzMkbf/6hntYeJLN9kVYaXwOSubcfndLd/IRF3zHco37HpGyfr/fx+pYcUFQUpDPSBwxpcqOgAGHU0ELflY4Wg7JTro/JzFnlTf/qZRLIK0F3z73FRQhjYYH8ldszb/+eADX8rn6ird+QrxU0NdIdel89Q7IsIw6+kcDa/Uh8s29ZPGfilEQcNwZsKPhbL1nQo8gRUU9nCXs8mGibasUhj7JSzvSDXMce/idAcO3inRDu0kAkFPSSWXYHucvOV7UqKvwvqosHo=", "c2_domain": ["checklist.skype.com", "62.173.142.51", "94.103.183.153", "193.233.175.111", "109.248.11.145", "31.41.44.106", "191.96.251.201"], "botnet": "7713", "server": "50", "serpent_key": "rqDYWFa4uPXuBFMj", "sleep_time": "1", "CONF_TIMEOUT": "20", "SetWaitableTimer_value": "0"}

Yara Signatures

Memory Dumps

SourceRuleDescriptionAuthorStrings
00000000.00000003.418089907.0000000002BE8000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_UrsnifYara detected UrsnifJoe Security
    00000000.00000003.418089907.0000000002BE8000.00000004.00000020.00020000.00000000.sdmpWindows_Trojan_Gozi_fd494041unknownunknown
    • 0x1228:$a1: /C ping localhost -n %u && del "%s"
    • 0xea8:$a2: /C "copy "%s" "%s" /y && "%s" "%s"
    • 0xf00:$a3: /C "copy "%s" "%s" /y && rundll32 "%s",%S"
    • 0xa9c:$a5: filename="%.4u.%lu"
    • 0x63a:$a7: version=%u&soft=%u&user=%08x%08x%08x%08x&server=%u&id=%u&type=%u&name=%s
    • 0x876:$a8: %08X-%04X-%04X-%04X-%08X%04X
    • 0xbb7:$a8: %08X-%04X-%04X-%04X-%08X%04X
    • 0xe6d:$a9: &whoami=%s
    • 0xe56:$a10: %u.%u_%u_%u_x%u
    • 0xd63:$a11: size=%u&hash=0x%08x
    • 0xb1d:$a12: &uptime=%u
    • 0x6fb:$a13: %systemroot%\system32\c_1252.nls
    • 0x1298:$a14: IE10RunOnceLastShown_TIMESTAMP
    00000000.00000003.418089907.0000000002BE8000.00000004.00000020.00020000.00000000.sdmpWindows_Trojan_Gozi_261f5ac5unknownunknown
    • 0xb54:$a1: soft=%u&version=%u&user=%08x%08x%08x%08x&server=%u&id=%u&crc=%x
    • 0x63a:$a2: version=%u&soft=%u&user=%08x%08x%08x%08x&server=%u&id=%u&type=%u&name=%s
    • 0xa68:$a3: Content-Disposition: form-data; name="upload_file"; filename="%.4u.%lu"
    • 0xcf2:$a5: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT %u.%u%s)
    • 0xd96:$a9: Software\AppDataLow\Software\Microsoft\
    • 0x1ce8:$a9: Software\AppDataLow\Software\Microsoft\
    00000000.00000003.417900586.0000000002BE8000.00000004.00000020.00020000.00000000.sdmpJoeSecurity_UrsnifYara detected UrsnifJoe Security
      00000000.00000003.417900586.0000000002BE8000.00000004.00000020.00020000.00000000.sdmpWindows_Trojan_Gozi_fd494041unknownunknown
      • 0x1228:$a1: /C ping localhost -n %u && del "%s"
      • 0xea8:$a2: /C "copy "%s" "%s" /y && "%s" "%s"
      • 0xf00:$a3: /C "copy "%s" "%s" /y && rundll32 "%s",%S"
      • 0xa9c:$a5: filename="%.4u.%lu"
      • 0x63a:$a7: version=%u&soft=%u&user=%08x%08x%08x%08x&server=%u&id=%u&type=%u&name=%s
      • 0x876:$a8: %08X-%04X-%04X-%04X-%08X%04X
      • 0xbb7:$a8: %08X-%04X-%04X-%04X-%08X%04X
      • 0xe6d:$a9: &whoami=%s
      • 0xe56:$a10: %u.%u_%u_%u_x%u
      • 0xd63:$a11: size=%u&hash=0x%08x
      • 0xb1d:$a12: &uptime=%u
      • 0x6fb:$a13: %systemroot%\system32\c_1252.nls
      • 0x1298:$a14: IE10RunOnceLastShown_TIMESTAMP