Resubmissions

03-07-2024 22:59

240703-2yn7wszhlp 10

03-07-2024 16:13

240703-tn93lsyglf 10

03-07-2024 16:11

240703-tm84xsyfma 10

10-05-2024 16:25

240510-tw1h5shh47 10

24-08-2023 11:16

230824-nda8msdf8z 10

05-08-2023 22:52

230805-2tn2bsfa82 10

Analysis

  • max time kernel
    120s
  • max time network
    138s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    03-07-2024 16:11

General

  • Target

    Archive.zip__ccacaxs2tbz2t6ob3e.exe

  • Size

    430KB

  • MD5

    a3cab1a43ff58b41f61f8ea32319386b

  • SHA1

    94689e1a9e1503f1082b23e6d5984d4587f3b9ec

  • SHA256

    005d3b2b78fa134092a43e53112e5c8518f14cf66e57e6a3cc723219120baba6

  • SHA512

    8f084a866c608833c3bf95b528927d9c05e8d4afcd8a52c3434d45c8ba8220c25d2f09e00aade708bbbc83b4edea60baf826750c529e8e9e05b1242c56d0198d

  • SSDEEP

    6144:vU9Q9tD5WuDQa4t3BMgLkzvCOnYxcEaSAOPou8BWinO8DR:8Q9tD5WyQlBBVAnYxRhr8DR

Score
8/10

Malware Config

Signatures

  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • Looks up external IP address via web service 1 IoCs

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

  • Modifies system certificate store 2 TTPs 10 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Archive.zip__ccacaxs2tbz2t6ob3e.exe
    "C:\Users\Admin\AppData\Local\Temp\Archive.zip__ccacaxs2tbz2t6ob3e.exe"
    1⤵
    • Loads dropped DLL
    • Modifies system certificate store
    • Suspicious use of WriteProcessMemory
    PID:1936
    • C:\Users\Admin\AppData\Local\Temp\55AF.tmp.exe
      C:\Users\Admin\AppData\Local\Temp\55AF.tmp.exe
      2⤵
      • Executes dropped EXE
      PID:1108

Network

MITRE ATT&CK Matrix ATT&CK v13

Defense Evasion

Subvert Trust Controls

1
T1553

Install Root Certificate

1
T1553.004

Modify Registry

1
T1112

Command and Control

Web Service

1
T1102

Replay Monitor

Loading Replay Monitor...

Downloads

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

    70KB

    MD5

    49aebf8cbd62d92ac215b2923fb1b9f5

    SHA1

    1723be06719828dda65ad804298d0431f6aff976

    SHA256

    b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

    SHA512

    bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

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

    342B

    MD5

    9c61d4e0a9a9a0d9f8e3d83eb320c95f

    SHA1

    be91c6016f46a321aa8ab372c6555240ebb7c661

    SHA256

    e5fb8eb6d546b16eaa25bed359b6d7c819e658172a016452a018aa2091426686

    SHA512

    73bedb01328389fec04b71c1821646d462dc8ec008b63c38ddfbfee803de2dec94c016a7640fa526ae815475923df69f3f91746745cccf1d23d49df99867d5d2

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

    342B

    MD5

    5333b9ed7d4e9ead6499461781573f14

    SHA1

    6dd613a9a4d9a70a568baf248bf67bfcc0402069

    SHA256

    2bec82e82746c36d5334c15254fad86267cbf8aedbe23d5acfc2e56991f8c2fd

    SHA512

    8f25e97ad710388fa7817a7916d2334b674584fbb8ba8996bcb4d31e0ba2e52fb994e263fd2aea18add55b2cafa215b6fdfd54c1a176c22fda8e52643ed25b61

  • C:\Users\Admin\AppData\Local\Temp\Cab4C6D.tmp
    Filesize

    65KB

    MD5

    ac05d27423a85adc1622c714f2cb6184

    SHA1

    b0fe2b1abddb97837ea0195be70ab2ff14d43198

    SHA256

    c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

    SHA512

    6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

  • C:\Users\Admin\AppData\Local\Temp\Tar4D6E.tmp
    Filesize

    181KB

    MD5

    4ea6026cf93ec6338144661bf1202cd1

    SHA1

    a1dec9044f750ad887935a01430bf49322fbdcb7

    SHA256

    8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

    SHA512

    6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

  • \Users\Admin\AppData\Local\Temp\55AF.tmp.exe
    Filesize

    149KB

    MD5

    060404f288040959694844afbd102966

    SHA1

    e0525e9ef6713fd7f269a669335ce3ddaab4b6a1

    SHA256

    40517e822f3442a2f389a50e905f40a6a2c4930077c865e3ea7b1929405f760a

    SHA512

    ddf8c53e1e1888084fa5422f297cc3ba9d97f7576c36f6b633ce67ca789127f7e259e9fb374fcbced66f883dadde0717d81ecce9776770bf07d8cf3b94b1a43f