Analysis

  • max time kernel
    30s
  • max time network
    33s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    07-06-2023 09:01

General

  • Target

    23E67C1D86130177DD66DE26BCF6DA711F4D0B7C7BE29.exe

  • Size

    2.7MB

  • MD5

    d35b5bab08ed6803970d14f007dc8ee3

  • SHA1

    b9613baaf96d486ed66de01a20d5f5c033909009

  • SHA256

    23e67c1d86130177dd66de26bcf6da711f4d0b7c7be298b891f6ed78aaa92f6d

  • SHA512

    6c5bf98751d014991d334b808c544dcdc73f02ba207b69ec524f2b2bcdc72c24d5b2b25100d56001e03b38c4977f4d16621fc0ea78ca899f67d92deeb6e7027f

  • SSDEEP

    49152:vveqMsE56Ff0uutJufj+B5PcX/OtnDTtFjnbHIJZrZBBx5QfU:vv8aFDklB5PcX/mdF7bHIJZr3Bx5M

Malware Config

Signatures

  • DcRat

    DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

  • Process spawned unexpected child process 18 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • UAC bypass 3 TTPs 6 IoCs
  • DCRat payload 7 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Executes dropped EXE 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 18 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs
  • System policy modification 1 TTPs 6 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\23E67C1D86130177DD66DE26BCF6DA711F4D0B7C7BE29.exe
    "C:\Users\Admin\AppData\Local\Temp\23E67C1D86130177DD66DE26BCF6DA711F4D0B7C7BE29.exe"
    1⤵
    • UAC bypass
    • Checks whether UAC is enabled
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:1388
    • C:\MSOCache\All Users\{90140000-00BA-0409-0000-0000000FF1CE}-C\WMIADAP.exe
      "C:\MSOCache\All Users\{90140000-00BA-0409-0000-0000000FF1CE}-C\WMIADAP.exe"
      2⤵
      • UAC bypass
      • Executes dropped EXE
      • Checks whether UAC is enabled
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • System policy modification
      PID:668
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 8 /tr "'C:\Users\Public\wininit.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:784
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Users\Public\wininit.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:804
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 10 /tr "'C:\Users\Public\wininit.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1336
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 8 /tr "'C:\Recovery\cfd8e0a2-b1a3-11ed-adb5-cee1c2fbb193\Idle.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:956
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Recovery\cfd8e0a2-b1a3-11ed-adb5-cee1c2fbb193\Idle.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1640
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 11 /tr "'C:\Recovery\cfd8e0a2-b1a3-11ed-adb5-cee1c2fbb193\Idle.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:552
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsml" /sc MINUTE /mo 9 /tr "'C:\Recovery\cfd8e0a2-b1a3-11ed-adb5-cee1c2fbb193\lsm.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1828
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Recovery\cfd8e0a2-b1a3-11ed-adb5-cee1c2fbb193\lsm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1556
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsml" /sc MINUTE /mo 9 /tr "'C:\Recovery\cfd8e0a2-b1a3-11ed-adb5-cee1c2fbb193\lsm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1712
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "23E67C1D86130177DD66DE26BCF6DA711F4D0B7C7BE292" /sc MINUTE /mo 9 /tr "'C:\Recovery\cfd8e0a2-b1a3-11ed-adb5-cee1c2fbb193\23E67C1D86130177DD66DE26BCF6DA711F4D0B7C7BE29.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1612
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "23E67C1D86130177DD66DE26BCF6DA711F4D0B7C7BE29" /sc ONLOGON /tr "'C:\Recovery\cfd8e0a2-b1a3-11ed-adb5-cee1c2fbb193\23E67C1D86130177DD66DE26BCF6DA711F4D0B7C7BE29.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:308
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "23E67C1D86130177DD66DE26BCF6DA711F4D0B7C7BE292" /sc MINUTE /mo 9 /tr "'C:\Recovery\cfd8e0a2-b1a3-11ed-adb5-cee1c2fbb193\23E67C1D86130177DD66DE26BCF6DA711F4D0B7C7BE29.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1328
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 9 /tr "'C:\Recovery\cfd8e0a2-b1a3-11ed-adb5-cee1c2fbb193\csrss.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1916
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Recovery\cfd8e0a2-b1a3-11ed-adb5-cee1c2fbb193\csrss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1056
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 6 /tr "'C:\Recovery\cfd8e0a2-b1a3-11ed-adb5-cee1c2fbb193\csrss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:920
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "WMIADAPW" /sc MINUTE /mo 8 /tr "'C:\MSOCache\All Users\{90140000-00BA-0409-0000-0000000FF1CE}-C\WMIADAP.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1676
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "WMIADAP" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-00BA-0409-0000-0000000FF1CE}-C\WMIADAP.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1600
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "WMIADAPW" /sc MINUTE /mo 12 /tr "'C:\MSOCache\All Users\{90140000-00BA-0409-0000-0000000FF1CE}-C\WMIADAP.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1596

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Privilege Escalation

Bypass User Account Control

1
T1088

Scheduled Task

1
T1053

Defense Evasion

Bypass User Account Control

1
T1088

Disabling Security Tools

1
T1089

Modify Registry

3
T1112

Install Root Certificate

1
T1130

Discovery

System Information Discovery

2
T1082

Query Registry

1
T1012

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\MSOCache\All Users\{90140000-00BA-0409-0000-0000000FF1CE}-C\WMIADAP.exe
    Filesize

    2.7MB

    MD5

    d35b5bab08ed6803970d14f007dc8ee3

    SHA1

    b9613baaf96d486ed66de01a20d5f5c033909009

    SHA256

    23e67c1d86130177dd66de26bcf6da711f4d0b7c7be298b891f6ed78aaa92f6d

    SHA512

    6c5bf98751d014991d334b808c544dcdc73f02ba207b69ec524f2b2bcdc72c24d5b2b25100d56001e03b38c4977f4d16621fc0ea78ca899f67d92deeb6e7027f

  • C:\MSOCache\All Users\{90140000-00BA-0409-0000-0000000FF1CE}-C\WMIADAP.exe
    Filesize

    2.7MB

    MD5

    d35b5bab08ed6803970d14f007dc8ee3

    SHA1

    b9613baaf96d486ed66de01a20d5f5c033909009

    SHA256

    23e67c1d86130177dd66de26bcf6da711f4d0b7c7be298b891f6ed78aaa92f6d

    SHA512

    6c5bf98751d014991d334b808c544dcdc73f02ba207b69ec524f2b2bcdc72c24d5b2b25100d56001e03b38c4977f4d16621fc0ea78ca899f67d92deeb6e7027f

  • C:\Recovery\cfd8e0a2-b1a3-11ed-adb5-cee1c2fbb193\csrss.exe
    Filesize

    2.7MB

    MD5

    d35b5bab08ed6803970d14f007dc8ee3

    SHA1

    b9613baaf96d486ed66de01a20d5f5c033909009

    SHA256

    23e67c1d86130177dd66de26bcf6da711f4d0b7c7be298b891f6ed78aaa92f6d

    SHA512

    6c5bf98751d014991d334b808c544dcdc73f02ba207b69ec524f2b2bcdc72c24d5b2b25100d56001e03b38c4977f4d16621fc0ea78ca899f67d92deeb6e7027f

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

    62KB

    MD5

    3ac860860707baaf32469fa7cc7c0192

    SHA1

    c33c2acdaba0e6fa41fd2f00f186804722477639

    SHA256

    d015145d551ecd14916270efad773bbc9fd57fad2228d2c24559f696c961d904

    SHA512

    d62ad2408c969a95550fb87efda50f988770ba5e39972041bf85924275baf156b8bec309ecc6409e5acdd37ec175dea40eff921ab58933b5b5b5d35a6147567c

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

    344B

    MD5

    53fa1f61d8971f0c20b1a0cc32d4c3bc

    SHA1

    ab470495a10e485682645e4d3efa811157754713

    SHA256

    25725798017e5a81a48675d49acd01baa258808946f3a97d625939a38f25c9f6

    SHA512

    50a3d4fc8f3895607355967633b8151b153199da597e100c35743bf6065c1b5bc9b3413108e3b9896c664338b6ea9d4fc366e3c91b3349227f420475940af9b4

  • C:\Users\Admin\AppData\Local\Temp\Cab5FA0.tmp
    Filesize

    61KB

    MD5

    fc4666cbca561e864e7fdf883a9e6661

    SHA1

    2f8d6094c7a34bf12ea0bbf0d51ee9c5bb7939a5

    SHA256

    10f3deb6c452d749a7451b5d065f4c0449737e5ee8a44f4d15844b503141e65b

    SHA512

    c71f54b571e01f247f072be4bbebdf5d8410b67eb79a61e7e0d9853fe857ab9bd12f53e6af3394b935560178107291fc4be351b27deb388eba90ba949633d57d

  • C:\Users\Admin\AppData\Local\Temp\Tar6330.tmp
    Filesize

    164KB

    MD5

    4ff65ad929cd9a367680e0e5b1c08166

    SHA1

    c0af0d4396bd1f15c45f39d3b849ba444233b3a2

    SHA256

    c8733c93cc5aaf5ca206d06af22ee8dbdec764fb5085019a6a9181feb9dfdee6

    SHA512

    f530dc0d024a5a3b8903ffaaa41b608a5ccdd6da4ba1949f2c2e55a9fca475fec5c8d2119b5763cabe7ef1c3788fb9dcac621869db51d65b1d83cfe404fb4c27

  • memory/668-91-0x000000001B0C0000-0x000000001B140000-memory.dmp
    Filesize

    512KB

  • memory/668-90-0x00000000004E0000-0x00000000004F2000-memory.dmp
    Filesize

    72KB

  • memory/668-89-0x000000001B0C0000-0x000000001B140000-memory.dmp
    Filesize

    512KB

  • memory/668-88-0x0000000000930000-0x0000000000BDE000-memory.dmp
    Filesize

    2.7MB

  • memory/1388-60-0x0000000000F70000-0x0000000000F7A000-memory.dmp
    Filesize

    40KB

  • memory/1388-63-0x0000000000F90000-0x0000000000F9C000-memory.dmp
    Filesize

    48KB

  • memory/1388-67-0x000000001AE90000-0x000000001AE98000-memory.dmp
    Filesize

    32KB

  • memory/1388-68-0x000000001AEA0000-0x000000001AEA8000-memory.dmp
    Filesize

    32KB

  • memory/1388-69-0x000000001AEB0000-0x000000001AEBC000-memory.dmp
    Filesize

    48KB

  • memory/1388-65-0x000000001A7E0000-0x000000001A7E8000-memory.dmp
    Filesize

    32KB

  • memory/1388-64-0x0000000000FA0000-0x0000000000FB2000-memory.dmp
    Filesize

    72KB

  • memory/1388-66-0x000000001A9F0000-0x000000001A9FE000-memory.dmp
    Filesize

    56KB

  • memory/1388-62-0x0000000000F80000-0x0000000000F8C000-memory.dmp
    Filesize

    48KB

  • memory/1388-61-0x000000001AE40000-0x000000001AE96000-memory.dmp
    Filesize

    344KB

  • memory/1388-54-0x0000000001030000-0x00000000012DE000-memory.dmp
    Filesize

    2.7MB

  • memory/1388-59-0x0000000000A40000-0x0000000000A50000-memory.dmp
    Filesize

    64KB

  • memory/1388-58-0x0000000000AD0000-0x0000000000AE6000-memory.dmp
    Filesize

    88KB

  • memory/1388-57-0x0000000000A30000-0x0000000000A40000-memory.dmp
    Filesize

    64KB

  • memory/1388-56-0x0000000000880000-0x000000000089C000-memory.dmp
    Filesize

    112KB

  • memory/1388-55-0x000000001AEE0000-0x000000001AF60000-memory.dmp
    Filesize

    512KB