Resubmissions

22-09-2023 16:16

230922-tqtteabb38 7

11-04-2023 19:36

230411-ya81lsgd6x 10

11-04-2023 19:28

230411-x6tp5aeg65 7

Analysis

  • max time kernel
    329s
  • max time network
    333s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    11-04-2023 19:36

General

  • Target

    krisp-1.21.1-installer_pQow-O1.exe

  • Size

    1.7MB

  • MD5

    02aca2415c558b9d62d6d2c61f568f5d

  • SHA1

    d2bb3e72371aee2d458bd2f147e56a9279e491e3

  • SHA256

    d7d9d426d72d2a994839ecba5e9a08a246c0b23d7a894804f070bd18ce513e65

  • SHA512

    5095f28f21a7b409d1ffb0a8e47ea741876c26436873d5ae3bb46ba6506b5f2baa866c0b3a8be61353ac3a472fe1d67bd93246509dd0c38040a0ab0ee6d7ce09

  • SSDEEP

    24576:+7FUDowAyrTVE3U5FmxNfKzSYJMPaJPfrT90eKc4cgFLNPfs8duMpmsD:+BuZrEUeKzkwPH9RHgFLRdp/

Score
10/10

Malware Config

Signatures

  • BazarBackdoor

    Stealthy backdoor targeting corporate networks, believed to be developed by Trickbot's authors.

  • Bazar/Team9 Backdoor payload 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies system certificate store 2 TTPs 17 IoCs
  • Script User-Agent 3 IoCs

    Uses user-agent string associated with script host/environment.

  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\krisp-1.21.1-installer_pQow-O1.exe
    "C:\Users\Admin\AppData\Local\Temp\krisp-1.21.1-installer_pQow-O1.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1636
    • C:\Users\Admin\AppData\Local\Temp\is-SJ9D7.tmp\krisp-1.21.1-installer_pQow-O1.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-SJ9D7.tmp\krisp-1.21.1-installer_pQow-O1.tmp" /SL5="$70120,875199,832512,C:\Users\Admin\AppData\Local\Temp\krisp-1.21.1-installer_pQow-O1.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Modifies system certificate store
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of FindShellTrayWindow
      PID:1816

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    61KB

    MD5

    e71c8443ae0bc2e282c73faead0a6dd3

    SHA1

    0c110c1b01e68edfacaeae64781a37b1995fa94b

    SHA256

    95b0a5acc5bf70d3abdfd091d0c9f9063aa4fde65bd34dbf16786082e1992e72

    SHA512

    b38458c7fa2825afb72794f374827403d5946b1132e136a0ce075dfd351277cf7d957c88dc8a1e4adc3bcae1fa8010dae3831e268e910d517691de24326391a6

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

    Filesize

    342B

    MD5

    f7dceef5f0a4ad510ff903951c4ab304

    SHA1

    1dd6f40b25673ea79b65f6b8eb1b7000d5c83f62

    SHA256

    e5dc13bb119907ca0fb853654b1fefb33abea3343e280a8587ea30722bebcfb4

    SHA512

    ec023f5a772915b96a2b3c8e5ee4f5f551fb19b6c3d41d5845b7800310d4618bf1ba9c27222aaa0ef038c2a581334ae7dfa4fdafdc18df6d23bc109a01dd1352

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

    Filesize

    342B

    MD5

    f8cd6e28b3e108d2adcea3f339ca83cd

    SHA1

    8b9366182842e7b879e57603e90c5d7589f12946

    SHA256

    269ecd8db404d4eee7560188fdb8c65a72073fa15ea54a416b9fdae5bf952430

    SHA512

    c8cb3f8b2f7f737a30bc4d6c216d7cce7021e0b7360cef90e2c4ab597b474d5e9c06b73e015befcec95eab1d427df09676120f7a113e712f41a56f1d69a03587

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

    Filesize

    342B

    MD5

    01eeb363ac7b6cac671aa71801e8c619

    SHA1

    007c1990ca82492e94d1e48c9429b1584c0450d1

    SHA256

    9417357b25745abe4ddbe69dd141ab822180bb542daf32c442821fcc11240535

    SHA512

    4d00171ce024e1940262b926f6ae355b27e593d7473da005c753f9267ea642bdee40cf6002e11cfd98a7723339f2010112e19905638ecf8d0f57c7c5a2a3345a

  • C:\Users\Admin\AppData\Local\Temp\Tar8A4D.tmp

    Filesize

    161KB

    MD5

    be2bec6e8c5653136d3e72fe53c98aa3

    SHA1

    a8182d6db17c14671c3d5766c72e58d87c0810de

    SHA256

    1919aab2a820642490169bdc4e88bd1189e22f83e7498bf8ebdfb62ec7d843fd

    SHA512

    0d1424ccdf0d53faf3f4e13d534e12f22388648aa4c23edbc503801e3c96b7f73c7999b760b5bef4b5e9dd923dffe21a21889b1ce836dd428420bf0f4f5327ff

  • C:\Users\Admin\AppData\Local\Temp\is-P76CH.tmp\mainlogo.jpg

    Filesize

    1KB

    MD5

    44ee5d39261b2dee433f25bd94636541

    SHA1

    5dd8ff8f152302f547afed43566f87b8485b7608

    SHA256

    4c33464206422caedd89aec841eba5bd97cdb09681a6fb71982c4a8cdda6468e

    SHA512

    00bb24405d8932fec67c66fb7feca5f79e7c22a1488682cafa582d252aabac4872c3dbc4b222dae5c95b9e062ef20910ea52bffb1c511b56cbc421f1f35d1b79

  • C:\Users\Admin\AppData\Local\Temp\is-P76CH.tmp\v_in_black_circle.png

    Filesize

    1KB

    MD5

    31eb10bb3b18e8aeed132ce3f9ccc267

    SHA1

    88b5e74a593c523206a588fc1a9d1bc1f3021915

    SHA256

    b64f4684beb5dabe885298a64a82c2182e8cb86c755cba162fc3916d3fb68437

    SHA512

    f5b7c89027b68783a6fc9101c1c4554b5c15d48b9d2ababfdfe5fb3e35777f43631776ee39ce951f9aad0c41ebb1fa0bbd4dfe1b2f81179ef5af55cccdd541e9

  • C:\Users\Admin\AppData\Local\Temp\is-SJ9D7.tmp\krisp-1.21.1-installer_pQow-O1.tmp

    Filesize

    3.0MB

    MD5

    a13e891e7f1734de75ec6d3645b5604d

    SHA1

    3f39e07f548f9f056ba55f69cbc90bb75d0c0a05

    SHA256

    cbc9575ca8ebfbeaaf95bd21b2ac54956c460e975c4c9d71fee791accdedd94e

    SHA512

    2f74400c821d4f0f2d6386d05bfbb01da9abcd3a341a630c82a35ea976fea26ad62f1b83f27db760fd42dac1fae5dbaf2371b9e61c30e18a2e39f443b1cafdb1

  • C:\Users\Admin\Downloads\krisp-1.21.1-installer.exe

    Filesize

    70.1MB

    MD5

    e2d02c2d0d744411a0a6e2935dea4f84

    SHA1

    fba0fcd0cff2c4ceda85c87ef2458558c8754401

    SHA256

    10cba83ef3cbfdc6636647c9fe1c273ffd7e833cd88b93f9c9666e8449764a36

    SHA512

    99681131e3cebee6416c4e08cbf766f36d8560a2c47eb160d4bdb6394bd038da9f58a2546f866d4a61c42423e08922e6ef1b432981f0f1d3f2d6931b9b926ae9

  • \Users\Admin\AppData\Local\Temp\is-P76CH.tmp\botva2.dll

    Filesize

    37KB

    MD5

    67965a5957a61867d661f05ae1f4773e

    SHA1

    f14c0a4f154dc685bb7c65b2d804a02a0fb2360d

    SHA256

    450b9b0ba25bf068afbc2b23d252585a19e282939bf38326384ea9112dfd0105

    SHA512

    c6942818b9026dc5db2d62999d32cf99fe7289f79a28b8345af17acf9d13b2229a5e917a48ff1f6d59715bdbcb00c1625e0302abcfe10ca7e0475762e0a3f41b

  • \Users\Admin\AppData\Local\Temp\is-SJ9D7.tmp\krisp-1.21.1-installer_pQow-O1.tmp

    Filesize

    3.0MB

    MD5

    a13e891e7f1734de75ec6d3645b5604d

    SHA1

    3f39e07f548f9f056ba55f69cbc90bb75d0c0a05

    SHA256

    cbc9575ca8ebfbeaaf95bd21b2ac54956c460e975c4c9d71fee791accdedd94e

    SHA512

    2f74400c821d4f0f2d6386d05bfbb01da9abcd3a341a630c82a35ea976fea26ad62f1b83f27db760fd42dac1fae5dbaf2371b9e61c30e18a2e39f443b1cafdb1

  • memory/1636-54-0x0000000000400000-0x00000000004D8000-memory.dmp

    Filesize

    864KB

  • memory/1636-84-0x0000000000400000-0x00000000004D8000-memory.dmp

    Filesize

    864KB

  • memory/1816-264-0x0000000003790000-0x000000000379F000-memory.dmp

    Filesize

    60KB

  • memory/1816-270-0x0000000000240000-0x0000000000241000-memory.dmp

    Filesize

    4KB

  • memory/1816-272-0x0000000000400000-0x000000000071B000-memory.dmp

    Filesize

    3.1MB

  • memory/1816-273-0x0000000003790000-0x000000000379F000-memory.dmp

    Filesize

    60KB

  • memory/1816-330-0x0000000000400000-0x000000000071B000-memory.dmp

    Filesize

    3.1MB

  • memory/1816-187-0x0000000000400000-0x000000000071B000-memory.dmp

    Filesize

    3.1MB

  • memory/1816-61-0x0000000000240000-0x0000000000241000-memory.dmp

    Filesize

    4KB

  • memory/1816-346-0x0000000000400000-0x000000000071B000-memory.dmp

    Filesize

    3.1MB

  • memory/1816-347-0x0000000003790000-0x000000000379F000-memory.dmp

    Filesize

    60KB