Analysis

  • max time kernel
    94s
  • max time network
    134s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    10-11-2020 11:21

General

  • Target

    a3c074948f5e3d2b89f0035bbf7bd74b1a3ec0525dc1496b4463f55ef15f3521.exe

  • Size

    725KB

  • MD5

    001841a84c6055b44bbafb3be385c8f6

  • SHA1

    1336143f18b91007601b488a281470e3e031af04

  • SHA256

    a3c074948f5e3d2b89f0035bbf7bd74b1a3ec0525dc1496b4463f55ef15f3521

  • SHA512

    c511aa90553d6297da0d273534137f3700e099062087cde29eb1cbed4922604bb6f97b0d4507688fa35145302bd6514e4676c6cb4d2ed3d3a162e8b0fd3d62c7

Malware Config

Signatures

  • Modifies file permissions 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 3 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Modifies system certificate store 2 TTPs 10 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a3c074948f5e3d2b89f0035bbf7bd74b1a3ec0525dc1496b4463f55ef15f3521.exe
    "C:\Users\Admin\AppData\Local\Temp\a3c074948f5e3d2b89f0035bbf7bd74b1a3ec0525dc1496b4463f55ef15f3521.exe"
    1⤵
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:412
    • C:\Windows\SysWOW64\icacls.exe
      icacls "C:\Users\Admin\AppData\Local\98a58501-62f2-4adc-9f4b-2274dc29237b" /deny *S-1-1-0:(OI)(CI)(DE,DC)
      2⤵
      • Modifies file permissions
      PID:1992
    • C:\Users\Admin\AppData\Local\Temp\a3c074948f5e3d2b89f0035bbf7bd74b1a3ec0525dc1496b4463f55ef15f3521.exe
      "C:\Users\Admin\AppData\Local\Temp\a3c074948f5e3d2b89f0035bbf7bd74b1a3ec0525dc1496b4463f55ef15f3521.exe" --Admin IsNotAutoStart IsNotTask
      2⤵
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      PID:2416

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

File Permissions Modification

1
T1222

Modify Registry

2
T1112

Install Root Certificate

1
T1130

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
    MD5

    43e21cc196f1fd47ffee7b29181a10cf

    SHA1

    ced1279d35e00e24ea474886742c58e09f4a2afd

    SHA256

    521861f255cb528838ab040a1fcb6f8e65b76a0c0c097ad1375aa88bb0d05b1f

    SHA512

    d5e5354af44ad98d82bbf9241b5983934e7c35554503ec107b4930561ee33682ca829ca17fb9de4a529daa6dbba40a8d7f1e99a8f821a7bd443851c46cb2418b

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
    MD5

    c3000da971d382eb6f83be64f496ca8e

    SHA1

    427db7d60757296b4caec5b7bcf181434a238ff6

    SHA256

    dfae812a4eddac02065c4515748783d853d5ffb1932913556ff19965cf43d12d

    SHA512

    6a17f63999615f32f7a66cc12f40f59aa37abcb12b71b563d902c9507230c6ee7ef0576879fd55dd0e1aaabfff41212000d36ab122c917639995880e30949812

  • C:\Users\Admin\AppData\Local\98a58501-62f2-4adc-9f4b-2274dc29237b\a3c074948f5e3d2b89f0035bbf7bd74b1a3ec0525dc1496b4463f55ef15f3521.exe
    MD5

    001841a84c6055b44bbafb3be385c8f6

    SHA1

    1336143f18b91007601b488a281470e3e031af04

    SHA256

    a3c074948f5e3d2b89f0035bbf7bd74b1a3ec0525dc1496b4463f55ef15f3521

    SHA512

    c511aa90553d6297da0d273534137f3700e099062087cde29eb1cbed4922604bb6f97b0d4507688fa35145302bd6514e4676c6cb4d2ed3d3a162e8b0fd3d62c7

  • memory/412-1-0x0000000002440000-0x0000000002441000-memory.dmp
    Filesize

    4KB

  • memory/1992-2-0x0000000000000000-mapping.dmp
  • memory/2416-4-0x0000000000000000-mapping.dmp
  • memory/2416-6-0x00000000022B0000-0x00000000022B1000-memory.dmp
    Filesize

    4KB