Analysis

  • max time kernel
    43s
  • max time network
    143s
  • platform
    windows7_x64
  • resource
    win7-20220715-en
  • resource tags

    arch:x64arch:x86image:win7-20220715-enlocale:en-usos:windows7-x64system
  • submitted
    06-08-2022 06:31

General

  • Target

    88bc85349ec9b3baf77191cc4a978305.exe

  • Size

    734KB

  • MD5

    88bc85349ec9b3baf77191cc4a978305

  • SHA1

    8d83732a53b9ece6d485d0c7bc58c9b547fe2720

  • SHA256

    cad0bd3e89c5f5068e476052ea238068c73584d0569ad13fa4ae10752f7d1245

  • SHA512

    6ca5a61dec84ad1534fc623663b4004e68971539a0a74f257299d6c6bf3743426673870c8cb944f6ed370c57c328a9650728195307fe21e84aeb5327070d0715

Malware Config

Extracted

Family

djvu

C2

http://acacaca.org/test1/get.php

Attributes
  • extension

    .vvew

  • offline_id

    rE5LpDv2ftYRXAo7bC18EpzfRMTHSGjgfyIMfZt1

  • payload_url

    http://rgyui.top/dl/build2.exe

    http://acacaca.org/files/1/build3.exe

  • ransomnote

    ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-QsoSRIeAK6 Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: support@bestyourmail.ch Reserve e-mail address to contact us: datarestorehelp@airmail.cc Your personal ID: 0530Jhyjd

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 10 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses 2FA software files, possible credential harvesting 2 TTPs
  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Looks up external IP address via web service 3 IoCs

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

  • Suspicious use of SetThreadContext 3 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies system certificate store 2 TTPs 11 IoCs
  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of WriteProcessMemory 43 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\88bc85349ec9b3baf77191cc4a978305.exe
    "C:\Users\Admin\AppData\Local\Temp\88bc85349ec9b3baf77191cc4a978305.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1432
    • C:\Users\Admin\AppData\Local\Temp\88bc85349ec9b3baf77191cc4a978305.exe
      "C:\Users\Admin\AppData\Local\Temp\88bc85349ec9b3baf77191cc4a978305.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1532
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\a96194de-b02e-44a5-99e7-ee618cda4911" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:1760
      • C:\Users\Admin\AppData\Local\Temp\88bc85349ec9b3baf77191cc4a978305.exe
        "C:\Users\Admin\AppData\Local\Temp\88bc85349ec9b3baf77191cc4a978305.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1916
        • C:\Users\Admin\AppData\Local\Temp\88bc85349ec9b3baf77191cc4a978305.exe
          "C:\Users\Admin\AppData\Local\Temp\88bc85349ec9b3baf77191cc4a978305.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Loads dropped DLL
          • Modifies system certificate store
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:1396
          • C:\Users\Admin\AppData\Local\13f100fc-a644-492e-9f37-7c1aed186740\build2.exe
            "C:\Users\Admin\AppData\Local\13f100fc-a644-492e-9f37-7c1aed186740\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:968
            • C:\Users\Admin\AppData\Local\13f100fc-a644-492e-9f37-7c1aed186740\build2.exe
              "C:\Users\Admin\AppData\Local\13f100fc-a644-492e-9f37-7c1aed186740\build2.exe"
              6⤵
              • Executes dropped EXE
              • Checks processor information in registry
              • Modifies system certificate store
              • Suspicious behavior: EnumeratesProcesses
              PID:2004

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

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

3
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

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

    2KB

    MD5

    eba45bc75daf7421d4767f04582068ca

    SHA1

    e2d2b46d3780a8b7cdde6e542430f0da28684ce8

    SHA256

    87f79123a6048371f5e4eccca848509ff8315dea4be740c8480fe945c02b4f38

    SHA512

    0c081c029224806b1f1f200da673a9554e5d40756736f9ca8bc073c25703092c6d1e72a2fd971b41bedeba26e6ca9fa85486df39f852505925a49d8b94e0e330

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
    Filesize

    1KB

    MD5

    4f74b1c3f52834fb5d5d0946410f286a

    SHA1

    e8b1734733535d236f422c282271e97b784b5261

    SHA256

    56b6f9f565e620e3cc377ac2265180c96efff2844f11cbb229eef977327869f1

    SHA512

    b84101ebe8570b2f0ecbefafcf58b941100ac6efc9cbbfc711e57bedf6cb6fc62141bd2d66c34f4b316568948ff6448c96ddef2cfde625965a9ea5968beefb2c

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

    488B

    MD5

    90ab47e8935a496513a38311c59db876

    SHA1

    0e744d1d0d7562b352dd2f77ba77b82ed1892e6c

    SHA256

    d6345cf59be46a1e842e51936f7c053c8fcdbc427108757dea0423f503e6217d

    SHA512

    5c5f59048f61f619aa79a47406e36479ce5d69bf85bc8b2ff6ab2e433aa5f225c0e5241495959860d6124049bf2f35db94fc0bb4c1a2c06f167d287542cef950

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
    Filesize

    340B

    MD5

    679010a70dbb077e014daa1e57b94fc9

    SHA1

    a648eb98ac5d9e796ab2930f5404c0accb43c252

    SHA256

    c3a9eb353787b7ef13e20a8e86b2e9a55515da66567bb3b0a0f8f21fba158518

    SHA512

    377ebabd0284da2ae997e7b54814810cc18ed319db50c143f5dd5ce2f0bdb69aa76067ca7ca7389c0ac7ac670f1c056e97a52a3edea7ea1017d84f199d97d830

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
    Filesize

    396B

    MD5

    c3dc4b82f089a93fd2bb9ce79bd05890

    SHA1

    44379855103aa92fcc3b966166ff7cdc29d039c4

    SHA256

    551f50204631736fa94140882e77c2241c3c4921e318452cf3c35cf8d396dcb2

    SHA512

    8e1dce4cd963bbdcda00c8366a4ec68360d49543d18af0e74b79ba6c91c82a3397bb6388174f752fcb974f4adc6bb6f1a1ca94d07bb5a0f916b2ec52be6f0532

  • C:\Users\Admin\AppData\Local\13f100fc-a644-492e-9f37-7c1aed186740\build2.exe
    Filesize

    438KB

    MD5

    2f3d0323ba962334ef87ed098ad02289

    SHA1

    5b4c70e331af83eaf384f45a01e322b094353375

    SHA256

    12a51367c5c85ff3c1dc73743cface2e01accecf2879a36adbddf566d52987b3

    SHA512

    1e33ace1068f614bfac35aa67733c2806328b586be273a611409df87be03c5edc9e312ab213004c8fab71453ef5e34e474d9273c4a97d95d135c18f440674ad3

  • C:\Users\Admin\AppData\Local\13f100fc-a644-492e-9f37-7c1aed186740\build2.exe
    Filesize

    438KB

    MD5

    2f3d0323ba962334ef87ed098ad02289

    SHA1

    5b4c70e331af83eaf384f45a01e322b094353375

    SHA256

    12a51367c5c85ff3c1dc73743cface2e01accecf2879a36adbddf566d52987b3

    SHA512

    1e33ace1068f614bfac35aa67733c2806328b586be273a611409df87be03c5edc9e312ab213004c8fab71453ef5e34e474d9273c4a97d95d135c18f440674ad3

  • C:\Users\Admin\AppData\Local\13f100fc-a644-492e-9f37-7c1aed186740\build2.exe
    Filesize

    438KB

    MD5

    2f3d0323ba962334ef87ed098ad02289

    SHA1

    5b4c70e331af83eaf384f45a01e322b094353375

    SHA256

    12a51367c5c85ff3c1dc73743cface2e01accecf2879a36adbddf566d52987b3

    SHA512

    1e33ace1068f614bfac35aa67733c2806328b586be273a611409df87be03c5edc9e312ab213004c8fab71453ef5e34e474d9273c4a97d95d135c18f440674ad3

  • C:\Users\Admin\AppData\Local\a96194de-b02e-44a5-99e7-ee618cda4911\88bc85349ec9b3baf77191cc4a978305.exe
    Filesize

    734KB

    MD5

    88bc85349ec9b3baf77191cc4a978305

    SHA1

    8d83732a53b9ece6d485d0c7bc58c9b547fe2720

    SHA256

    cad0bd3e89c5f5068e476052ea238068c73584d0569ad13fa4ae10752f7d1245

    SHA512

    6ca5a61dec84ad1534fc623663b4004e68971539a0a74f257299d6c6bf3743426673870c8cb944f6ed370c57c328a9650728195307fe21e84aeb5327070d0715

  • \Users\Admin\AppData\Local\13f100fc-a644-492e-9f37-7c1aed186740\build2.exe
    Filesize

    438KB

    MD5

    2f3d0323ba962334ef87ed098ad02289

    SHA1

    5b4c70e331af83eaf384f45a01e322b094353375

    SHA256

    12a51367c5c85ff3c1dc73743cface2e01accecf2879a36adbddf566d52987b3

    SHA512

    1e33ace1068f614bfac35aa67733c2806328b586be273a611409df87be03c5edc9e312ab213004c8fab71453ef5e34e474d9273c4a97d95d135c18f440674ad3

  • \Users\Admin\AppData\Local\13f100fc-a644-492e-9f37-7c1aed186740\build2.exe
    Filesize

    438KB

    MD5

    2f3d0323ba962334ef87ed098ad02289

    SHA1

    5b4c70e331af83eaf384f45a01e322b094353375

    SHA256

    12a51367c5c85ff3c1dc73743cface2e01accecf2879a36adbddf566d52987b3

    SHA512

    1e33ace1068f614bfac35aa67733c2806328b586be273a611409df87be03c5edc9e312ab213004c8fab71453ef5e34e474d9273c4a97d95d135c18f440674ad3

  • memory/968-88-0x00000000002D0000-0x0000000000316000-memory.dmp
    Filesize

    280KB

  • memory/968-90-0x000000000050B000-0x0000000000534000-memory.dmp
    Filesize

    164KB

  • memory/968-85-0x000000000050B000-0x0000000000534000-memory.dmp
    Filesize

    164KB

  • memory/968-82-0x0000000000000000-mapping.dmp
  • memory/1396-69-0x0000000000424141-mapping.dmp
  • memory/1396-73-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/1396-115-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/1396-79-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/1432-54-0x0000000000220000-0x00000000002B1000-memory.dmp
    Filesize

    580KB

  • memory/1432-58-0x0000000000220000-0x00000000002B1000-memory.dmp
    Filesize

    580KB

  • memory/1432-59-0x0000000003EA0000-0x0000000003FBB000-memory.dmp
    Filesize

    1.1MB

  • memory/1532-55-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/1532-56-0x0000000000424141-mapping.dmp
  • memory/1532-61-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/1532-62-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/1532-60-0x0000000076031000-0x0000000076033000-memory.dmp
    Filesize

    8KB

  • memory/1532-66-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/1760-63-0x0000000000000000-mapping.dmp
  • memory/1916-71-0x0000000000350000-0x00000000003E1000-memory.dmp
    Filesize

    580KB

  • memory/1916-67-0x0000000000350000-0x00000000003E1000-memory.dmp
    Filesize

    580KB

  • memory/1916-65-0x0000000000000000-mapping.dmp
  • memory/2004-87-0x000000000041FE8C-mapping.dmp
  • memory/2004-86-0x0000000000400000-0x0000000000459000-memory.dmp
    Filesize

    356KB

  • memory/2004-92-0x0000000000400000-0x0000000000459000-memory.dmp
    Filesize

    356KB

  • memory/2004-94-0x0000000000400000-0x0000000000459000-memory.dmp
    Filesize

    356KB

  • memory/2004-95-0x0000000060900000-0x0000000060992000-memory.dmp
    Filesize

    584KB

  • memory/2004-114-0x0000000000400000-0x0000000000459000-memory.dmp
    Filesize

    356KB