Analysis

  • max time kernel
    176s
  • max time network
    141s
  • platform
    windows7_x64
  • resource
    win7-20231023-en
  • resource tags

    arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
  • submitted
    31/10/2023, 15:30

General

  • Target

    NEAS.2023-09-09_33a23f4d5daaa89eb8d8670d6905e2b6_ryuk_JC.exe

  • Size

    23.8MB

  • MD5

    33a23f4d5daaa89eb8d8670d6905e2b6

  • SHA1

    d8f5fda873300d62264476857127aec2630ac69d

  • SHA256

    7a594a1a5faee5de90b6730de40f8c768d81ec6c612879d0c1c4e63cd06e755d

  • SHA512

    fa79e6b0705ab6afed75da132b457752c9e68f7ff9c211060ea41f8faff60cba43a46ff34db98ebb28635f68f8cfa05d73e21a45355443d523f808f4be71995d

  • SSDEEP

    98304:9E2RpMMHMMMvMMZMMMlmMMMiMMMYJMMHMMM6MMZMMMqNMMzMMMUMMVMMMYJMMzMF:9nwngnwnBRs

Score
10/10

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 2 IoCs
  • Drops startup file 3 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Enumerates connected drives 3 TTPs 46 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops autorun.inf file 1 TTPs 3 IoCs

    Malware can abuse Windows Autorun to spread further via attached volumes.

  • Drops file in System32 directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\NEAS.2023-09-09_33a23f4d5daaa89eb8d8670d6905e2b6_ryuk_JC.exe
    "C:\Users\Admin\AppData\Local\Temp\NEAS.2023-09-09_33a23f4d5daaa89eb8d8670d6905e2b6_ryuk_JC.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Drops startup file
    • Loads dropped DLL
    • Enumerates connected drives
    • Drops autorun.inf file
    • Drops file in System32 directory
    • Suspicious use of WriteProcessMemory
    PID:3016
    • C:\Windows\SysWOW64\HelpMe.exe
      C:\Windows\system32\HelpMe.exe
      2⤵
      • Modifies WinLogon for persistence
      • Drops startup file
      • Executes dropped EXE
      • Enumerates connected drives
      • Drops autorun.inf file
      • Drops file in System32 directory
      PID:2716

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\$Recycle.Bin\S-1-5-21-3425689832-2386927309-2650718742-1000\desktop.ini.exe

    Filesize

    23.8MB

    MD5

    e85cac498ebaf37128539bf1b4b515b5

    SHA1

    8d15dc2d63799d77969a1717c427959c49c91357

    SHA256

    ee8998935ec2d19d049d64435a3e82064bf0d768e4cc3063c1686673e5089102

    SHA512

    563c4ff50d0a826541dacc24d6180c420caae4d465c05fae3690795b9cca7c0661b3be929ce2c560483b284c16e244a996269c76862b75255c647bc754a3c953

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    954B

    MD5

    f67f0df14699263c43e9cb528b4f4bc6

    SHA1

    dcccd2c0720b3da2716ee7a59ad90789389e2e14

    SHA256

    64025758745ad90f080bdae802293dd832a9a9face5efefd0a0df0d2bfb333cd

    SHA512

    ccb664f09f5d4ee6e9f21e5e0bfe8347f0d57319310f661611edb2d4cee0eddb89bc8cc8ad57a2e37420ee091105c5c3de7c66ee8098d8619cb59779f3c4ad51

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1KB

    MD5

    c0b62a03b25592dcbc3935694128dc4b

    SHA1

    b88da8ff5bb03954d57e76826ae3cfe823e1b78a

    SHA256

    4e22c6f1677b98eb0625dfa74142a8b1e48c7013d62c86953f3b10f270f0dffb

    SHA512

    cb9deb6a104c47ee77b1b89aae5ea7b25a6ad3425b1629cdff16e6dd64355e3b47bdf01ad2716f523b5747f6f783cb4c68569f4de9f59258045e4fbb52fec853

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    954B

    MD5

    f67f0df14699263c43e9cb528b4f4bc6

    SHA1

    dcccd2c0720b3da2716ee7a59ad90789389e2e14

    SHA256

    64025758745ad90f080bdae802293dd832a9a9face5efefd0a0df0d2bfb333cd

    SHA512

    ccb664f09f5d4ee6e9f21e5e0bfe8347f0d57319310f661611edb2d4cee0eddb89bc8cc8ad57a2e37420ee091105c5c3de7c66ee8098d8619cb59779f3c4ad51

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    954B

    MD5

    f67f0df14699263c43e9cb528b4f4bc6

    SHA1

    dcccd2c0720b3da2716ee7a59ad90789389e2e14

    SHA256

    64025758745ad90f080bdae802293dd832a9a9face5efefd0a0df0d2bfb333cd

    SHA512

    ccb664f09f5d4ee6e9f21e5e0bfe8347f0d57319310f661611edb2d4cee0eddb89bc8cc8ad57a2e37420ee091105c5c3de7c66ee8098d8619cb59779f3c4ad51

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    954B

    MD5

    f67f0df14699263c43e9cb528b4f4bc6

    SHA1

    dcccd2c0720b3da2716ee7a59ad90789389e2e14

    SHA256

    64025758745ad90f080bdae802293dd832a9a9face5efefd0a0df0d2bfb333cd

    SHA512

    ccb664f09f5d4ee6e9f21e5e0bfe8347f0d57319310f661611edb2d4cee0eddb89bc8cc8ad57a2e37420ee091105c5c3de7c66ee8098d8619cb59779f3c4ad51

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1KB

    MD5

    c0b62a03b25592dcbc3935694128dc4b

    SHA1

    b88da8ff5bb03954d57e76826ae3cfe823e1b78a

    SHA256

    4e22c6f1677b98eb0625dfa74142a8b1e48c7013d62c86953f3b10f270f0dffb

    SHA512

    cb9deb6a104c47ee77b1b89aae5ea7b25a6ad3425b1629cdff16e6dd64355e3b47bdf01ad2716f523b5747f6f783cb4c68569f4de9f59258045e4fbb52fec853

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    954B

    MD5

    f67f0df14699263c43e9cb528b4f4bc6

    SHA1

    dcccd2c0720b3da2716ee7a59ad90789389e2e14

    SHA256

    64025758745ad90f080bdae802293dd832a9a9face5efefd0a0df0d2bfb333cd

    SHA512

    ccb664f09f5d4ee6e9f21e5e0bfe8347f0d57319310f661611edb2d4cee0eddb89bc8cc8ad57a2e37420ee091105c5c3de7c66ee8098d8619cb59779f3c4ad51

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1KB

    MD5

    833a80d1a602a2e7a91bc26fe8ea9105

    SHA1

    00271636d2d723e4e1c5e20f501d15007f2925ff

    SHA256

    7d5988d6ad1c4305051a075fadeaaadf56bc6e9a42c87e3294207aee68244f96

    SHA512

    874ff13c2e4d71967567352fa9cb782f8b426f7a0c689e235a5463b0d632ac59820a93c459e4cf44b5957289494f70ad55cdf0148e6603f928cfe10f1271e529

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1KB

    MD5

    c0b62a03b25592dcbc3935694128dc4b

    SHA1

    b88da8ff5bb03954d57e76826ae3cfe823e1b78a

    SHA256

    4e22c6f1677b98eb0625dfa74142a8b1e48c7013d62c86953f3b10f270f0dffb

    SHA512

    cb9deb6a104c47ee77b1b89aae5ea7b25a6ad3425b1629cdff16e6dd64355e3b47bdf01ad2716f523b5747f6f783cb4c68569f4de9f59258045e4fbb52fec853

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    954B

    MD5

    f67f0df14699263c43e9cb528b4f4bc6

    SHA1

    dcccd2c0720b3da2716ee7a59ad90789389e2e14

    SHA256

    64025758745ad90f080bdae802293dd832a9a9face5efefd0a0df0d2bfb333cd

    SHA512

    ccb664f09f5d4ee6e9f21e5e0bfe8347f0d57319310f661611edb2d4cee0eddb89bc8cc8ad57a2e37420ee091105c5c3de7c66ee8098d8619cb59779f3c4ad51

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1KB

    MD5

    c0b62a03b25592dcbc3935694128dc4b

    SHA1

    b88da8ff5bb03954d57e76826ae3cfe823e1b78a

    SHA256

    4e22c6f1677b98eb0625dfa74142a8b1e48c7013d62c86953f3b10f270f0dffb

    SHA512

    cb9deb6a104c47ee77b1b89aae5ea7b25a6ad3425b1629cdff16e6dd64355e3b47bdf01ad2716f523b5747f6f783cb4c68569f4de9f59258045e4fbb52fec853

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1KB

    MD5

    c0b62a03b25592dcbc3935694128dc4b

    SHA1

    b88da8ff5bb03954d57e76826ae3cfe823e1b78a

    SHA256

    4e22c6f1677b98eb0625dfa74142a8b1e48c7013d62c86953f3b10f270f0dffb

    SHA512

    cb9deb6a104c47ee77b1b89aae5ea7b25a6ad3425b1629cdff16e6dd64355e3b47bdf01ad2716f523b5747f6f783cb4c68569f4de9f59258045e4fbb52fec853

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    954B

    MD5

    f67f0df14699263c43e9cb528b4f4bc6

    SHA1

    dcccd2c0720b3da2716ee7a59ad90789389e2e14

    SHA256

    64025758745ad90f080bdae802293dd832a9a9face5efefd0a0df0d2bfb333cd

    SHA512

    ccb664f09f5d4ee6e9f21e5e0bfe8347f0d57319310f661611edb2d4cee0eddb89bc8cc8ad57a2e37420ee091105c5c3de7c66ee8098d8619cb59779f3c4ad51

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1KB

    MD5

    c0b62a03b25592dcbc3935694128dc4b

    SHA1

    b88da8ff5bb03954d57e76826ae3cfe823e1b78a

    SHA256

    4e22c6f1677b98eb0625dfa74142a8b1e48c7013d62c86953f3b10f270f0dffb

    SHA512

    cb9deb6a104c47ee77b1b89aae5ea7b25a6ad3425b1629cdff16e6dd64355e3b47bdf01ad2716f523b5747f6f783cb4c68569f4de9f59258045e4fbb52fec853

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1KB

    MD5

    c0b62a03b25592dcbc3935694128dc4b

    SHA1

    b88da8ff5bb03954d57e76826ae3cfe823e1b78a

    SHA256

    4e22c6f1677b98eb0625dfa74142a8b1e48c7013d62c86953f3b10f270f0dffb

    SHA512

    cb9deb6a104c47ee77b1b89aae5ea7b25a6ad3425b1629cdff16e6dd64355e3b47bdf01ad2716f523b5747f6f783cb4c68569f4de9f59258045e4fbb52fec853

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1KB

    MD5

    c0b62a03b25592dcbc3935694128dc4b

    SHA1

    b88da8ff5bb03954d57e76826ae3cfe823e1b78a

    SHA256

    4e22c6f1677b98eb0625dfa74142a8b1e48c7013d62c86953f3b10f270f0dffb

    SHA512

    cb9deb6a104c47ee77b1b89aae5ea7b25a6ad3425b1629cdff16e6dd64355e3b47bdf01ad2716f523b5747f6f783cb4c68569f4de9f59258045e4fbb52fec853

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1KB

    MD5

    c0b62a03b25592dcbc3935694128dc4b

    SHA1

    b88da8ff5bb03954d57e76826ae3cfe823e1b78a

    SHA256

    4e22c6f1677b98eb0625dfa74142a8b1e48c7013d62c86953f3b10f270f0dffb

    SHA512

    cb9deb6a104c47ee77b1b89aae5ea7b25a6ad3425b1629cdff16e6dd64355e3b47bdf01ad2716f523b5747f6f783cb4c68569f4de9f59258045e4fbb52fec853

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1KB

    MD5

    c0b62a03b25592dcbc3935694128dc4b

    SHA1

    b88da8ff5bb03954d57e76826ae3cfe823e1b78a

    SHA256

    4e22c6f1677b98eb0625dfa74142a8b1e48c7013d62c86953f3b10f270f0dffb

    SHA512

    cb9deb6a104c47ee77b1b89aae5ea7b25a6ad3425b1629cdff16e6dd64355e3b47bdf01ad2716f523b5747f6f783cb4c68569f4de9f59258045e4fbb52fec853

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    954B

    MD5

    f67f0df14699263c43e9cb528b4f4bc6

    SHA1

    dcccd2c0720b3da2716ee7a59ad90789389e2e14

    SHA256

    64025758745ad90f080bdae802293dd832a9a9face5efefd0a0df0d2bfb333cd

    SHA512

    ccb664f09f5d4ee6e9f21e5e0bfe8347f0d57319310f661611edb2d4cee0eddb89bc8cc8ad57a2e37420ee091105c5c3de7c66ee8098d8619cb59779f3c4ad51

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    954B

    MD5

    f67f0df14699263c43e9cb528b4f4bc6

    SHA1

    dcccd2c0720b3da2716ee7a59ad90789389e2e14

    SHA256

    64025758745ad90f080bdae802293dd832a9a9face5efefd0a0df0d2bfb333cd

    SHA512

    ccb664f09f5d4ee6e9f21e5e0bfe8347f0d57319310f661611edb2d4cee0eddb89bc8cc8ad57a2e37420ee091105c5c3de7c66ee8098d8619cb59779f3c4ad51

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

    Filesize

    1KB

    MD5

    c0b62a03b25592dcbc3935694128dc4b

    SHA1

    b88da8ff5bb03954d57e76826ae3cfe823e1b78a

    SHA256

    4e22c6f1677b98eb0625dfa74142a8b1e48c7013d62c86953f3b10f270f0dffb

    SHA512

    cb9deb6a104c47ee77b1b89aae5ea7b25a6ad3425b1629cdff16e6dd64355e3b47bdf01ad2716f523b5747f6f783cb4c68569f4de9f59258045e4fbb52fec853

  • C:\Windows\SysWOW64\HelpMe.exe

    Filesize

    23.8MB

    MD5

    391789ab1e8a0d746a0b1427855e43f1

    SHA1

    85867cb80c74ed2005c804bd931b0f990a084744

    SHA256

    f5176edb1a501786f367e3711d5844a41ef2cbbd3f2b3757ea569be4075a8386

    SHA512

    c950bcace586604d46514c5f91402597eefa8bee828fd37a67df62f9c9056f61cbe911c76772ae7af14a467bdabbd3f63da9a7c983a5fff06c3e2647ae849104

  • C:\Windows\SysWOW64\HelpMe.exe

    Filesize

    23.8MB

    MD5

    391789ab1e8a0d746a0b1427855e43f1

    SHA1

    85867cb80c74ed2005c804bd931b0f990a084744

    SHA256

    f5176edb1a501786f367e3711d5844a41ef2cbbd3f2b3757ea569be4075a8386

    SHA512

    c950bcace586604d46514c5f91402597eefa8bee828fd37a67df62f9c9056f61cbe911c76772ae7af14a467bdabbd3f63da9a7c983a5fff06c3e2647ae849104

  • C:\Windows\SysWOW64\HelpMe.exe

    Filesize

    23.8MB

    MD5

    391789ab1e8a0d746a0b1427855e43f1

    SHA1

    85867cb80c74ed2005c804bd931b0f990a084744

    SHA256

    f5176edb1a501786f367e3711d5844a41ef2cbbd3f2b3757ea569be4075a8386

    SHA512

    c950bcace586604d46514c5f91402597eefa8bee828fd37a67df62f9c9056f61cbe911c76772ae7af14a467bdabbd3f63da9a7c983a5fff06c3e2647ae849104

  • F:\AUTORUN.INF

    Filesize

    145B

    MD5

    ca13857b2fd3895a39f09d9dde3cca97

    SHA1

    8b78c5b2ec97c372ebdcef92d14b0998f8dd6dd0

    SHA256

    cfe448b4506a95b33b529efa88f1ac704d8bdf98a941c065650ead27609318ae

    SHA512

    55e5b5325968d1e5314527fb2d26012f5aae4a1c38e305417be273400cb1c6d0c22b85bddb501d7a5720a3f53bb5caf6ada8a7894232344c4f6c6ef85d226b47

  • F:\AutoRun.exe

    Filesize

    23.8MB

    MD5

    33a23f4d5daaa89eb8d8670d6905e2b6

    SHA1

    d8f5fda873300d62264476857127aec2630ac69d

    SHA256

    7a594a1a5faee5de90b6730de40f8c768d81ec6c612879d0c1c4e63cd06e755d

    SHA512

    fa79e6b0705ab6afed75da132b457752c9e68f7ff9c211060ea41f8faff60cba43a46ff34db98ebb28635f68f8cfa05d73e21a45355443d523f808f4be71995d

  • \Windows\SysWOW64\HelpMe.exe

    Filesize

    23.8MB

    MD5

    391789ab1e8a0d746a0b1427855e43f1

    SHA1

    85867cb80c74ed2005c804bd931b0f990a084744

    SHA256

    f5176edb1a501786f367e3711d5844a41ef2cbbd3f2b3757ea569be4075a8386

    SHA512

    c950bcace586604d46514c5f91402597eefa8bee828fd37a67df62f9c9056f61cbe911c76772ae7af14a467bdabbd3f63da9a7c983a5fff06c3e2647ae849104

  • \Windows\SysWOW64\HelpMe.exe

    Filesize

    23.8MB

    MD5

    391789ab1e8a0d746a0b1427855e43f1

    SHA1

    85867cb80c74ed2005c804bd931b0f990a084744

    SHA256

    f5176edb1a501786f367e3711d5844a41ef2cbbd3f2b3757ea569be4075a8386

    SHA512

    c950bcace586604d46514c5f91402597eefa8bee828fd37a67df62f9c9056f61cbe911c76772ae7af14a467bdabbd3f63da9a7c983a5fff06c3e2647ae849104

  • memory/2716-15-0x0000000000400000-0x000000000047B000-memory.dmp

    Filesize

    492KB

  • memory/2716-14-0x00000000001B0000-0x00000000001B1000-memory.dmp

    Filesize

    4KB

  • memory/2716-72-0x0000000000400000-0x000000000047B000-memory.dmp

    Filesize

    492KB

  • memory/3016-11-0x0000000000340000-0x00000000003BB000-memory.dmp

    Filesize

    492KB

  • memory/3016-71-0x0000000000340000-0x00000000003BB000-memory.dmp

    Filesize

    492KB

  • memory/3016-0-0x0000000000400000-0x000000000047B000-memory.dmp

    Filesize

    492KB

  • memory/3016-4-0x0000000000220000-0x0000000000221000-memory.dmp

    Filesize

    4KB

  • memory/3016-3-0x0000000000400000-0x000000000047B000-memory.dmp

    Filesize

    492KB

  • memory/3016-1-0x0000000000220000-0x0000000000221000-memory.dmp

    Filesize

    4KB