Analysis

  • max time kernel
    152s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-en-20211104
  • submitted
    10-11-2021 05:24

General

  • Target

    08cb82859479b33dc1d0738b985db28c.exe

  • Size

    228KB

  • MD5

    08cb82859479b33dc1d0738b985db28c

  • SHA1

    2162cec3e4a16e4b9c610004011473965cf300f8

  • SHA256

    8db223a1ffa1b3b3788ee9f0e050cc64f7b5cbefa8745e95e00391f7babcce58

  • SHA512

    a69a4eacb8ced14dc55fca39d43d6182fe8d600d4da9fb938298fc151866a26777b45a527bcb2cc099d734111dbeb70224ed16e9b590c8b76b057b905eb7c912

Malware Config

Extracted

Family

smokeloader

Version

2020

C2

http://nusurtal4f.net/

http://netomishnetojuk.net/

http://escalivrouter.net/

http://nick22doom4.net/

http://wrioshtivsio.su/

http://nusotiso4.su/

http://rickkhtovkka.biz/

http://palisotoliso.net/

rc4.i32
rc4.i32

Extracted

Family

djvu

C2

http://pqkl.org/lancer/get.php

Attributes
  • extension

    .irfk

  • offline_id

    7HKlLI6NrOQGMaTs5PqjvV1UcZ3VOcIeyFiH3Wt1

  • payload_url

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

    http://pqkl.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-dFmA3YqXzs 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: manager@mailtemp.ch Reserve e-mail address to contact us: helprestoremanager@airmail.cc Your personal ID: 0346uSifke

rsa_pubkey.plain

Signatures

  • Detected Djvu ransomware 6 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Executes dropped EXE 5 IoCs
  • Deletes itself 1 IoCs
  • Loads dropped DLL 5 IoCs
  • 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.

  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

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

  • Modifies system certificate store 2 TTPs 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SendNotifyMessage 2 IoCs
  • Suspicious use of WriteProcessMemory 38 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\08cb82859479b33dc1d0738b985db28c.exe
    "C:\Users\Admin\AppData\Local\Temp\08cb82859479b33dc1d0738b985db28c.exe"
    1⤵
    • Loads dropped DLL
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:472
  • C:\Users\Admin\AppData\Local\Temp\CE18.exe
    C:\Users\Admin\AppData\Local\Temp\CE18.exe
    1⤵
    • Executes dropped EXE
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:628
    • C:\Users\Admin\AppData\Local\Temp\CE18.exe
      C:\Users\Admin\AppData\Local\Temp\CE18.exe
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious use of WriteProcessMemory
      PID:1864
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\028a2abc-9c49-4617-8da4-c91d337ed2ed" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2016
      • C:\Users\Admin\AppData\Local\Temp\CE18.exe
        "C:\Users\Admin\AppData\Local\Temp\CE18.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:892
        • C:\Users\Admin\AppData\Local\Temp\CE18.exe
          "C:\Users\Admin\AppData\Local\Temp\CE18.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Executes dropped EXE
          • Modifies system certificate store
          PID:1488
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {4A80A437-09DC-4EF9-A2C2-2E8A816E332B} S-1-5-21-103686315-404690609-2047157615-1000:EDWYFHKN\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1392
    • C:\Users\Admin\AppData\Roaming\egjfiwa
      C:\Users\Admin\AppData\Roaming\egjfiwa
      2⤵
      • Executes dropped EXE
      PID:396

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

Discovery

System Information Discovery

2
T1082

Query Registry

1
T1012

Peripheral Device Discovery

1
T1120

Replay Monitor

Loading Replay Monitor...

Downloads

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

    d8ec7917c33f103a7288af33cae7de14

    SHA1

    285babb225e06e84a4050f140d21970ecd9d39ee

    SHA256

    467d7ceb2f929daba1e910064fad42123bb2ecd65f57423900bb3777e88b7e89

    SHA512

    9accf32dbfd9260dbfee95982c6487882828f86f3e090f598d6f426760c093886ba68ec664b7db942027320c1eb95029c45c98ea139308a491d0b15dab6aad79

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
    MD5

    026c2a59b797991b8379df56c6ea513a

    SHA1

    266a2e055410708de4db7e704b4ed449006a1f2b

    SHA256

    21ed5e42cf0d63dffeb9e5d3711e6b760f84d8c8c1715d5f8bf9ea047a1dbabe

    SHA512

    809116817fd88a722ccaa7703a850e103e034aa20b351f50f5b29ee198352568a6aa06cd78b75c19e03757230d30058366f3c25aa043c02d9f7d5301f457cb80

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

    e2fc7dea42a74111c8ea260f04b72cb1

    SHA1

    94cc546b38eab980b21ac3f4f2e4a3681b9638af

    SHA256

    a962a4b16e87637ae15c52ce51ea25e8ca8d39800a8462532b95d2a3123c93e7

    SHA512

    67cbe1503440b166c40f30e988709284ad56d1d3df26dd19be3f80b7c2c3d3622606a262e8425b1d65fa33063ac5e01ebde08294e992d6f6583a6fd23991cfdd

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
    MD5

    3c0f9c5b554639152c0a647f660bff21

    SHA1

    2e62c890c0bd5f1d4e1bc8fe0f56320d05e94270

    SHA256

    bdf99bc8f43aeb2ea505da05a327363d2e21725834f09abd2b1f3568404a89a3

    SHA512

    551b6af2b533d26bc34666b3e024462bc1914e8dda7dad47ea5a6e6a92580a3fd8a19e2890c1e39d2cf2632e009ef273edb85221f163c5c6240a4ac2fe36effb

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
    MD5

    d2b7d7e0d5d21cb6ed7fd585b3cf165e

    SHA1

    ef04f299140debb9a5a55db91eeb033c55fda0a5

    SHA256

    a982b81ea4512c39d95465c7ea7dda6a5d4721cbb91ee7d3be52c6a5e9bd583b

    SHA512

    18877889cb8780ebd7ec517cf5c626ecb9300e15d376382c36690f1e4e7f1a6fbe95c68224a68bcfaaf621c89884c660edda4f89ae0eea1b079063590ab1c8ce

  • C:\Users\Admin\AppData\Local\028a2abc-9c49-4617-8da4-c91d337ed2ed\CE18.exe
    MD5

    eb9c73e540da58c65f2624d33dba9e28

    SHA1

    88b0906beeb2d2105cb52bb9a155197b9ea2fd99

    SHA256

    c6636e2da0b85f59afe657c17e3bd580de60534ae6547536631deb21f80405dd

    SHA512

    c10e4c216b00abece9808814725a5b0aff5b466185506525c53ae2b414e10df70d44712586c4f81721570c92a3371d3a8205c8a4b90ca0554e6de9fb94d6fea5

  • C:\Users\Admin\AppData\Local\Temp\1105.tmp
    MD5

    d124f55b9393c976963407dff51ffa79

    SHA1

    2c7bbedd79791bfb866898c85b504186db610b5d

    SHA256

    ea1e16247c848c8c171c4cd1fa17bc5a018a1fcb0c0dac25009066b6667b8eef

    SHA512

    278fe3a4b1fbbe700e4f4483b610133e975e36e101455661d5197bd892a68839b9d555499040d200c92aefa9e3819380e395c0cd85d5fc845c6364d128a8cf06

  • C:\Users\Admin\AppData\Local\Temp\CE18.exe
    MD5

    eb9c73e540da58c65f2624d33dba9e28

    SHA1

    88b0906beeb2d2105cb52bb9a155197b9ea2fd99

    SHA256

    c6636e2da0b85f59afe657c17e3bd580de60534ae6547536631deb21f80405dd

    SHA512

    c10e4c216b00abece9808814725a5b0aff5b466185506525c53ae2b414e10df70d44712586c4f81721570c92a3371d3a8205c8a4b90ca0554e6de9fb94d6fea5

  • C:\Users\Admin\AppData\Local\Temp\CE18.exe
    MD5

    eb9c73e540da58c65f2624d33dba9e28

    SHA1

    88b0906beeb2d2105cb52bb9a155197b9ea2fd99

    SHA256

    c6636e2da0b85f59afe657c17e3bd580de60534ae6547536631deb21f80405dd

    SHA512

    c10e4c216b00abece9808814725a5b0aff5b466185506525c53ae2b414e10df70d44712586c4f81721570c92a3371d3a8205c8a4b90ca0554e6de9fb94d6fea5

  • C:\Users\Admin\AppData\Local\Temp\CE18.exe
    MD5

    eb9c73e540da58c65f2624d33dba9e28

    SHA1

    88b0906beeb2d2105cb52bb9a155197b9ea2fd99

    SHA256

    c6636e2da0b85f59afe657c17e3bd580de60534ae6547536631deb21f80405dd

    SHA512

    c10e4c216b00abece9808814725a5b0aff5b466185506525c53ae2b414e10df70d44712586c4f81721570c92a3371d3a8205c8a4b90ca0554e6de9fb94d6fea5

  • C:\Users\Admin\AppData\Local\Temp\CE18.exe
    MD5

    eb9c73e540da58c65f2624d33dba9e28

    SHA1

    88b0906beeb2d2105cb52bb9a155197b9ea2fd99

    SHA256

    c6636e2da0b85f59afe657c17e3bd580de60534ae6547536631deb21f80405dd

    SHA512

    c10e4c216b00abece9808814725a5b0aff5b466185506525c53ae2b414e10df70d44712586c4f81721570c92a3371d3a8205c8a4b90ca0554e6de9fb94d6fea5

  • C:\Users\Admin\AppData\Local\Temp\CE18.exe
    MD5

    eb9c73e540da58c65f2624d33dba9e28

    SHA1

    88b0906beeb2d2105cb52bb9a155197b9ea2fd99

    SHA256

    c6636e2da0b85f59afe657c17e3bd580de60534ae6547536631deb21f80405dd

    SHA512

    c10e4c216b00abece9808814725a5b0aff5b466185506525c53ae2b414e10df70d44712586c4f81721570c92a3371d3a8205c8a4b90ca0554e6de9fb94d6fea5

  • C:\Users\Admin\AppData\Roaming\egjfiwa
    MD5

    08cb82859479b33dc1d0738b985db28c

    SHA1

    2162cec3e4a16e4b9c610004011473965cf300f8

    SHA256

    8db223a1ffa1b3b3788ee9f0e050cc64f7b5cbefa8745e95e00391f7babcce58

    SHA512

    a69a4eacb8ced14dc55fca39d43d6182fe8d600d4da9fb938298fc151866a26777b45a527bcb2cc099d734111dbeb70224ed16e9b590c8b76b057b905eb7c912

  • C:\Users\Admin\AppData\Roaming\egjfiwa
    MD5

    08cb82859479b33dc1d0738b985db28c

    SHA1

    2162cec3e4a16e4b9c610004011473965cf300f8

    SHA256

    8db223a1ffa1b3b3788ee9f0e050cc64f7b5cbefa8745e95e00391f7babcce58

    SHA512

    a69a4eacb8ced14dc55fca39d43d6182fe8d600d4da9fb938298fc151866a26777b45a527bcb2cc099d734111dbeb70224ed16e9b590c8b76b057b905eb7c912

  • \Users\Admin\AppData\Local\Temp\1105.tmp
    MD5

    d124f55b9393c976963407dff51ffa79

    SHA1

    2c7bbedd79791bfb866898c85b504186db610b5d

    SHA256

    ea1e16247c848c8c171c4cd1fa17bc5a018a1fcb0c0dac25009066b6667b8eef

    SHA512

    278fe3a4b1fbbe700e4f4483b610133e975e36e101455661d5197bd892a68839b9d555499040d200c92aefa9e3819380e395c0cd85d5fc845c6364d128a8cf06

  • \Users\Admin\AppData\Local\Temp\CE18.exe
    MD5

    eb9c73e540da58c65f2624d33dba9e28

    SHA1

    88b0906beeb2d2105cb52bb9a155197b9ea2fd99

    SHA256

    c6636e2da0b85f59afe657c17e3bd580de60534ae6547536631deb21f80405dd

    SHA512

    c10e4c216b00abece9808814725a5b0aff5b466185506525c53ae2b414e10df70d44712586c4f81721570c92a3371d3a8205c8a4b90ca0554e6de9fb94d6fea5

  • \Users\Admin\AppData\Local\Temp\CE18.exe
    MD5

    eb9c73e540da58c65f2624d33dba9e28

    SHA1

    88b0906beeb2d2105cb52bb9a155197b9ea2fd99

    SHA256

    c6636e2da0b85f59afe657c17e3bd580de60534ae6547536631deb21f80405dd

    SHA512

    c10e4c216b00abece9808814725a5b0aff5b466185506525c53ae2b414e10df70d44712586c4f81721570c92a3371d3a8205c8a4b90ca0554e6de9fb94d6fea5

  • \Users\Admin\AppData\Local\Temp\CE18.exe
    MD5

    eb9c73e540da58c65f2624d33dba9e28

    SHA1

    88b0906beeb2d2105cb52bb9a155197b9ea2fd99

    SHA256

    c6636e2da0b85f59afe657c17e3bd580de60534ae6547536631deb21f80405dd

    SHA512

    c10e4c216b00abece9808814725a5b0aff5b466185506525c53ae2b414e10df70d44712586c4f81721570c92a3371d3a8205c8a4b90ca0554e6de9fb94d6fea5

  • \Users\Admin\AppData\Local\Temp\CE18.exe
    MD5

    eb9c73e540da58c65f2624d33dba9e28

    SHA1

    88b0906beeb2d2105cb52bb9a155197b9ea2fd99

    SHA256

    c6636e2da0b85f59afe657c17e3bd580de60534ae6547536631deb21f80405dd

    SHA512

    c10e4c216b00abece9808814725a5b0aff5b466185506525c53ae2b414e10df70d44712586c4f81721570c92a3371d3a8205c8a4b90ca0554e6de9fb94d6fea5

  • memory/396-74-0x0000000000400000-0x0000000000442000-memory.dmp
    Filesize

    264KB

  • memory/396-64-0x0000000000000000-mapping.dmp
  • memory/472-58-0x0000000000400000-0x0000000000442000-memory.dmp
    Filesize

    264KB

  • memory/472-55-0x0000000075D01000-0x0000000075D03000-memory.dmp
    Filesize

    8KB

  • memory/472-57-0x0000000000240000-0x0000000000249000-memory.dmp
    Filesize

    36KB

  • memory/472-56-0x0000000000230000-0x0000000000238000-memory.dmp
    Filesize

    32KB

  • memory/628-61-0x0000000000000000-mapping.dmp
  • memory/628-75-0x0000000004520000-0x000000000463B000-memory.dmp
    Filesize

    1.1MB

  • memory/628-66-0x0000000000360000-0x00000000003F2000-memory.dmp
    Filesize

    584KB

  • memory/892-82-0x0000000000000000-mapping.dmp
  • memory/892-84-0x00000000002B0000-0x0000000000342000-memory.dmp
    Filesize

    584KB

  • memory/1212-60-0x0000000002A20000-0x0000000002A36000-memory.dmp
    Filesize

    88KB

  • memory/1488-87-0x0000000000424141-mapping.dmp
  • memory/1488-95-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/1864-77-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/1864-71-0x0000000000400000-0x0000000000537000-memory.dmp
    Filesize

    1.2MB

  • memory/1864-72-0x0000000000424141-mapping.dmp
  • memory/2016-78-0x0000000000000000-mapping.dmp