Analysis

  • max time kernel
    150s
  • max time network
    142s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    26-09-2021 19:27

General

  • Target

    42752f5ad56e5b7db47f5cade7e84abc.exe

  • Size

    852KB

  • MD5

    42752f5ad56e5b7db47f5cade7e84abc

  • SHA1

    e1cb9c502536f14f0760c4404b307a4804cb14c8

  • SHA256

    926962feeeae5258e6d7bc03c9561cb19912e44b587a1eb30f54f52db479254c

  • SHA512

    bd41b3d06af5fce351309c6fc05a77aed088be5726a7cfe5b76b2fd05eb962d53c8733adb33ee066fd562d069b4805792aecf280b1f74994f97f7be3db11aa6b

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.mail.ru
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    PxhrKDkvikRcSaP2dkv9

Extracted

Family

oski

C2

schulenburgrvpark.com

Signatures

  • AgentTesla

    Agent Tesla is a remote access tool (RAT) written in visual basic.

  • Oski

    Oski is an infostealer targeting browser data, crypto wallets.

  • suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

    suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

  • suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile

    suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile

  • suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil

    suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil

  • AgentTesla Payload 2 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 3 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • 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 processor information in registry 2 TTPs 1 IoCs

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

  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Kills process with taskkill 1 IoCs
  • Modifies registry class 9 IoCs
  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 38 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\42752f5ad56e5b7db47f5cade7e84abc.exe
    "C:\Users\Admin\AppData\Local\Temp\42752f5ad56e5b7db47f5cade7e84abc.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1096
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\42752f5ad56e5b7db47f5cade7e84abc.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2640
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\tlZLQDWEhCq" /XML "C:\Users\Admin\AppData\Local\Temp\tmpFBC0.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:2876
    • C:\Users\Admin\AppData\Local\Temp\42752f5ad56e5b7db47f5cade7e84abc.exe
      "C:\Users\Admin\AppData\Local\Temp\42752f5ad56e5b7db47f5cade7e84abc.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:576
      • C:\Users\Admin\AppData\Local\Temp\app.exe
        "C:\Users\Admin\AppData\Local\Temp\app.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1096
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\app.exe"
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1268
        • C:\Windows\SysWOW64\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vhdkcrwsNOIJ" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4102.tmp"
          4⤵
          • Creates scheduled task(s)
          PID:1264
        • C:\Users\Admin\AppData\Local\Temp\app.exe
          "C:\Users\Admin\AppData\Local\Temp\app.exe"
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Checks processor information in registry
          • Suspicious use of WriteProcessMemory
          PID:3176
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\System32\cmd.exe" /c taskkill /pid 3176 & erase C:\Users\Admin\AppData\Local\Temp\app.exe & RD /S /Q C:\\ProgramData\\632655614958872\\* & exit
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:3620
            • C:\Windows\SysWOW64\taskkill.exe
              taskkill /pid 3176
              6⤵
              • Kills process with taskkill
              • Suspicious use of AdjustPrivilegeToken
              PID:1476

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Registry Run Keys / Startup Folder

1
T1060

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Modify Registry

1
T1112

Credential Access

Credentials in Files

4
T1081

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

4
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log
    MD5

    1c19c16e21c97ed42d5beabc93391fc5

    SHA1

    8ad83f8e0b3acf8dfbbf87931e41f0d664c4df68

    SHA256

    1bcd97396c83babfe6c5068ba590d7a3f8b70e72955a9d1e4070648e404cbf05

    SHA512

    7d18776d8f649b3d29c182ff03efc6cea8b527542ee55304980f24577aae8b64e37044407776e220984346c3998ace5f8853afa58c8b38407482a728e9495e0c

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
    MD5

    db582b3f97dea60c0b9790c6918a6893

    SHA1

    cdca5c88454b1a9912cdf6b524b39689bc668e29

    SHA256

    0a66eb1ed232702b2feed2059d55d09776a6b64f3e6305558a7e3c5b330eadb1

    SHA512

    6347608a92a0b1b9ae4b3eb489401f097e3819edb5858ca932e5993d15eb7c8649dbe04704077c718f908762e4928c8c1a6d573a4c95fab3520ad97089dd7f28

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

    9a1c9056f35e3923800d334987f671e4

    SHA1

    919904d34d8992084e2646b6243872698d7e72d3

    SHA256

    cb282f663b4ad5bbe80246cb866afafea7b90aa3219ba62f1aac5f22c6b6040f

    SHA512

    5e45a87974b6d41d38b247d79bd63bd58ae679836b37d3a3e30234a9cb7f31aadad66e3f90e419b9e4e890314573f2868fd98660f2ed82f05a175febfdb6be09

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

    9a1c9056f35e3923800d334987f671e4

    SHA1

    919904d34d8992084e2646b6243872698d7e72d3

    SHA256

    cb282f663b4ad5bbe80246cb866afafea7b90aa3219ba62f1aac5f22c6b6040f

    SHA512

    5e45a87974b6d41d38b247d79bd63bd58ae679836b37d3a3e30234a9cb7f31aadad66e3f90e419b9e4e890314573f2868fd98660f2ed82f05a175febfdb6be09

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

    9a1c9056f35e3923800d334987f671e4

    SHA1

    919904d34d8992084e2646b6243872698d7e72d3

    SHA256

    cb282f663b4ad5bbe80246cb866afafea7b90aa3219ba62f1aac5f22c6b6040f

    SHA512

    5e45a87974b6d41d38b247d79bd63bd58ae679836b37d3a3e30234a9cb7f31aadad66e3f90e419b9e4e890314573f2868fd98660f2ed82f05a175febfdb6be09

  • \ProgramData\mozglue.dll
    MD5

    8f73c08a9660691143661bf7332c3c27

    SHA1

    37fa65dd737c50fda710fdbde89e51374d0c204a

    SHA256

    3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

    SHA512

    0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

  • \ProgramData\nss3.dll
    MD5

    bfac4e3c5908856ba17d41edcd455a51

    SHA1

    8eec7e888767aa9e4cca8ff246eb2aacb9170428

    SHA256

    e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

    SHA512

    2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

  • \ProgramData\sqlite3.dll
    MD5

    e477a96c8f2b18d6b5c27bde49c990bf

    SHA1

    e980c9bf41330d1e5bd04556db4646a0210f7409

    SHA256

    16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660

    SHA512

    335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c

  • memory/576-130-0x00000000004377DE-mapping.dmp
  • memory/576-238-0x0000000005710000-0x0000000005711000-memory.dmp
    Filesize

    4KB

  • memory/576-139-0x0000000005180000-0x0000000005181000-memory.dmp
    Filesize

    4KB

  • memory/576-129-0x0000000000400000-0x000000000043C000-memory.dmp
    Filesize

    240KB

  • memory/1096-124-0x00000000080F0000-0x0000000008133000-memory.dmp
    Filesize

    268KB

  • memory/1096-118-0x0000000005180000-0x0000000005181000-memory.dmp
    Filesize

    4KB

  • memory/1096-388-0x0000000000510000-0x0000000000511000-memory.dmp
    Filesize

    4KB

  • memory/1096-123-0x0000000007FF0000-0x000000000805D000-memory.dmp
    Filesize

    436KB

  • memory/1096-116-0x0000000005680000-0x0000000005681000-memory.dmp
    Filesize

    4KB

  • memory/1096-117-0x00000000050C0000-0x00000000050C1000-memory.dmp
    Filesize

    4KB

  • memory/1096-122-0x0000000007DB0000-0x0000000007DB1000-memory.dmp
    Filesize

    4KB

  • memory/1096-385-0x0000000000000000-mapping.dmp
  • memory/1096-121-0x0000000006040000-0x000000000605D000-memory.dmp
    Filesize

    116KB

  • memory/1096-394-0x0000000005300000-0x0000000005307000-memory.dmp
    Filesize

    28KB

  • memory/1096-395-0x0000000004E30000-0x0000000004EC2000-memory.dmp
    Filesize

    584KB

  • memory/1096-397-0x0000000007190000-0x00000000071FC000-memory.dmp
    Filesize

    432KB

  • memory/1096-120-0x0000000005F10000-0x0000000005F11000-memory.dmp
    Filesize

    4KB

  • memory/1096-119-0x0000000005170000-0x0000000005171000-memory.dmp
    Filesize

    4KB

  • memory/1096-114-0x0000000000790000-0x0000000000791000-memory.dmp
    Filesize

    4KB

  • memory/1096-398-0x0000000007300000-0x000000000733C000-memory.dmp
    Filesize

    240KB

  • memory/1264-400-0x0000000000000000-mapping.dmp
  • memory/1268-399-0x0000000000000000-mapping.dmp
  • memory/1268-413-0x0000000006E60000-0x0000000006E61000-memory.dmp
    Filesize

    4KB

  • memory/1268-415-0x0000000006E62000-0x0000000006E63000-memory.dmp
    Filesize

    4KB

  • memory/1268-414-0x0000000007E80000-0x0000000007E81000-memory.dmp
    Filesize

    4KB

  • memory/1268-418-0x0000000008360000-0x0000000008361000-memory.dmp
    Filesize

    4KB

  • memory/1268-509-0x000000007F5B0000-0x000000007F5B1000-memory.dmp
    Filesize

    4KB

  • memory/1268-510-0x0000000006E63000-0x0000000006E64000-memory.dmp
    Filesize

    4KB

  • memory/1476-660-0x0000000000000000-mapping.dmp
  • memory/2640-168-0x00000000097C0000-0x00000000097C1000-memory.dmp
    Filesize

    4KB

  • memory/2640-140-0x0000000007460000-0x0000000007461000-memory.dmp
    Filesize

    4KB

  • memory/2640-364-0x0000000009770000-0x0000000009771000-memory.dmp
    Filesize

    4KB

  • memory/2640-169-0x0000000004AB3000-0x0000000004AB4000-memory.dmp
    Filesize

    4KB

  • memory/2640-167-0x0000000009600000-0x0000000009601000-memory.dmp
    Filesize

    4KB

  • memory/2640-162-0x0000000009490000-0x0000000009491000-memory.dmp
    Filesize

    4KB

  • memory/2640-160-0x000000007EB40000-0x000000007EB41000-memory.dmp
    Filesize

    4KB

  • memory/2640-125-0x0000000000000000-mapping.dmp
  • memory/2640-131-0x0000000004A00000-0x0000000004A01000-memory.dmp
    Filesize

    4KB

  • memory/2640-154-0x00000000094B0000-0x00000000094E3000-memory.dmp
    Filesize

    204KB

  • memory/2640-146-0x0000000008530000-0x0000000008531000-memory.dmp
    Filesize

    4KB

  • memory/2640-134-0x00000000074C0000-0x00000000074C1000-memory.dmp
    Filesize

    4KB

  • memory/2640-145-0x0000000008720000-0x0000000008721000-memory.dmp
    Filesize

    4KB

  • memory/2640-144-0x0000000007CA0000-0x0000000007CA1000-memory.dmp
    Filesize

    4KB

  • memory/2640-143-0x0000000007E20000-0x0000000007E21000-memory.dmp
    Filesize

    4KB

  • memory/2640-141-0x0000000007B60000-0x0000000007B61000-memory.dmp
    Filesize

    4KB

  • memory/2640-370-0x0000000009760000-0x0000000009761000-memory.dmp
    Filesize

    4KB

  • memory/2640-138-0x0000000004AB2000-0x0000000004AB3000-memory.dmp
    Filesize

    4KB

  • memory/2640-136-0x0000000004AB0000-0x0000000004AB1000-memory.dmp
    Filesize

    4KB

  • memory/2876-128-0x0000000000000000-mapping.dmp
  • memory/3176-412-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/3176-402-0x000000000040717B-mapping.dmp
  • memory/3176-401-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/3620-659-0x0000000000000000-mapping.dmp