Analysis

  • max time kernel
    146s
  • max time network
    148s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    03-12-2020 08:30

General

  • Target

    Consignment Document PL&BL Draft.exe

  • Size

    684KB

  • MD5

    b70ffeb2babbacb28b22411beccb4642

  • SHA1

    3c096e92894c9ff7bfae0fcc0ce5f250cb4ebe9f

  • SHA256

    623d707cab5c5dc378a5100018e29f88949f4ea4be4b34cc2fc36e1612b68100

  • SHA512

    79471594362dcb6f5ecbddb34ce68ddbbfc2320fa088439a54a0dfba7c878d32e5715366808b7a7399f33c9b992e6ebac75d90d9cdc5d591b42e480f4874db41

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

:5550

centurygift.myq-see.com:5550

Mutex

a60f1e04-b281-49b0-9733-22b28c2ea6d7

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    centurygift.myq-see.com

  • backup_dns_server

    centurygift.myq-see.com

  • buffer_size

    65535

  • build_time

    2020-09-08T01:46:57.095018036Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    5550

  • default_group

    Default

  • enable_debug_mode

    true

  • gc_threshold

    1.048576e+07

  • keep_alive_timeout

    30000

  • keyboard_logging

    false

  • lan_timeout

    2500

  • max_packet_size

    1.048576e+07

  • mutex

    a60f1e04-b281-49b0-9733-22b28c2ea6d7

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

  • primary_dns_server

    centurygift.myq-see.com

  • request_elevation

    true

  • restart_delay

    5000

  • run_delay

    0

  • run_on_startup

    false

  • set_critical_process

    true

  • timeout_interval

    5000

  • use_custom_dns_server

    false

  • version

    1.2.2.0

  • wan_timeout

    8000

Extracted

Family

asyncrat

Version

0.5.7B

C2

centurygift.myq-see.com:5500

Mutex

AsyncMutex_6SI8OkPnk

Attributes
  • aes_key

    bWbB4qsIdUz0RazB3LzXObRAUS2SpbLy

  • anti_detection

    false

  • autorun

    true

  • bdos

    false

  • delay

    Default

  • host

    centurygift.myq-see.com

  • hwid

    3

  • install_file

  • install_folder

    %Temp%

  • mutex

    AsyncMutex_6SI8OkPnk

  • pastebin_config

    null

  • port

    5500

  • version

    0.5.7B

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers.

  • NanoCore

    NanoCore is a remote access tool (RAT) with a variety of capabilities.

  • Async RAT payload 4 IoCs
  • Executes dropped EXE 5 IoCs
  • 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.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 18 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 34 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Consignment Document PL&BL Draft.exe
    "C:\Users\Admin\AppData\Local\Temp\Consignment Document PL&BL Draft.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1404
    • C:\Users\Admin\AppData\Local\Temp\Consignment Document PL&BL Draft.exe
      "{path}"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1172
      • C:\Users\Admin\AppData\Local\Temp\Rczgwoxvqzh.exe
        "C:\Users\Admin\AppData\Local\Temp\Rczgwoxvqzh.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:2756
        • C:\Users\Admin\AppData\Local\Temp\Isgeprf.exe
          "C:\Users\Admin\AppData\Local\Temp\Isgeprf.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1228
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "VLC2" /tr '"C:\Users\Admin\AppData\Local\Temp\VLC2.exe"' & exit
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:1576
            • C:\Windows\SysWOW64\schtasks.exe
              schtasks /create /f /sc onlogon /rl highest /tn "VLC2" /tr '"C:\Users\Admin\AppData\Local\Temp\VLC2.exe"'
              6⤵
              • Creates scheduled task(s)
              PID:3828
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp64E5.tmp.bat""
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:1008
            • C:\Windows\SysWOW64\timeout.exe
              timeout 3
              6⤵
              • Delays execution with timeout.exe
              PID:3944
            • C:\Users\Admin\AppData\Local\Temp\VLC2.exe
              "C:\Users\Admin\AppData\Local\Temp\VLC2.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious use of AdjustPrivilegeToken
              PID:200
        • C:\Users\Admin\AppData\Local\Temp\Fdquqwatjjr.exe
          "C:\Users\Admin\AppData\Local\Temp\Fdquqwatjjr.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1080
      • C:\Users\Admin\AppData\Local\Temp\Icda.exe
        "C:\Users\Admin\AppData\Local\Temp\Icda.exe"
        3⤵
        • Executes dropped EXE
        • Adds Run key to start application
        • Checks whether UAC is enabled
        • Drops file in Program Files directory
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of AdjustPrivilegeToken
        PID:3852

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

2
T1081

Discovery

System Information Discovery

1
T1082

Collection

Data from Local System

2
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Consignment Document PL&BL Draft.exe.log
    MD5

    3fed8d1dd11972a6e2603bb2d73a3ee5

    SHA1

    7ecb7f64ade7b91c5815da647e84167c3d95afb4

    SHA256

    eecf6c0575dc995a485d46a5daaa66f58229e552f16782d873834d218ab17551

    SHA512

    ca6059eb67f800cc666d5146d24070abf5ee08209f8f9d1668a0ca2201eb3f6fa013c2d807b09925e12b82c37686980fcc26a6a5e4a5ba129c4b2a585961d3bb

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

    e8dc83a4ed7657d3211077b7f343fc3c

    SHA1

    0af6cb0ca0d55a2ec6626443b5d91f9c0d0c332c

    SHA256

    c0791632452fd17fdb08b4241ad7b6f5aaf1af6190861301135ef3631f4b4020

    SHA512

    f37155be17e744b46cb76f746ec8d02e7d6f0ec8b3d8caa583081504e15674b9c1bb5e3061b149aeb599325293959704064b3512f156797c1f5046289e41125c

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

    e8dc83a4ed7657d3211077b7f343fc3c

    SHA1

    0af6cb0ca0d55a2ec6626443b5d91f9c0d0c332c

    SHA256

    c0791632452fd17fdb08b4241ad7b6f5aaf1af6190861301135ef3631f4b4020

    SHA512

    f37155be17e744b46cb76f746ec8d02e7d6f0ec8b3d8caa583081504e15674b9c1bb5e3061b149aeb599325293959704064b3512f156797c1f5046289e41125c

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

    bb21f995740d8bc1549d9cbc32874dd8

    SHA1

    8c53b645027362ec97c15735eeb39a12d62c8a74

    SHA256

    9589565f7beb6dccfe4f8424455271bbf810182ea94dacbc8c081577e34a51e1

    SHA512

    608e1871476d3534d9c7bc1951ccc4abbb3056f57d3c64beb1d13b8a453de7b113001c70c0a1728a2776538d464893990a88035b2fb34254f24927e4536ae24b

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

    bb21f995740d8bc1549d9cbc32874dd8

    SHA1

    8c53b645027362ec97c15735eeb39a12d62c8a74

    SHA256

    9589565f7beb6dccfe4f8424455271bbf810182ea94dacbc8c081577e34a51e1

    SHA512

    608e1871476d3534d9c7bc1951ccc4abbb3056f57d3c64beb1d13b8a453de7b113001c70c0a1728a2776538d464893990a88035b2fb34254f24927e4536ae24b

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

    e2da4f42475e01f7961ef2fb929de54e

    SHA1

    e57df765da7135d578b29e4619cc395a729eb757

    SHA256

    488c59fddf2db00da7fb4d6589183adc7396edc4233f23eb950aa7191fe4366e

    SHA512

    08cf988be2b1d4214812477759bf273e1281d762491d5eb40ed77c95ad701a08fce0d5a67b7d2163389e0efa96422dd535d1062ecb345ac6054688e38eb6e2a0

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

    e2da4f42475e01f7961ef2fb929de54e

    SHA1

    e57df765da7135d578b29e4619cc395a729eb757

    SHA256

    488c59fddf2db00da7fb4d6589183adc7396edc4233f23eb950aa7191fe4366e

    SHA512

    08cf988be2b1d4214812477759bf273e1281d762491d5eb40ed77c95ad701a08fce0d5a67b7d2163389e0efa96422dd535d1062ecb345ac6054688e38eb6e2a0

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

    01475371c9519a0c8f64b7606a0833e0

    SHA1

    58de8246d2910f00ed1d4deabc69cf60d8ddcf8b

    SHA256

    97a5cab2336f3b81f82d7ec85b2f0937ce39d10e512bf0bdade9248d6d1bc682

    SHA512

    9db9f3d2f6db0e1e7154d79b54316a0a54d75bdab327ec248d23f7eed3db54bb00c61c003c92e1b1c38d30eefa6a680cba73b7cf28de3c2181bb82b25e40662f

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

    01475371c9519a0c8f64b7606a0833e0

    SHA1

    58de8246d2910f00ed1d4deabc69cf60d8ddcf8b

    SHA256

    97a5cab2336f3b81f82d7ec85b2f0937ce39d10e512bf0bdade9248d6d1bc682

    SHA512

    9db9f3d2f6db0e1e7154d79b54316a0a54d75bdab327ec248d23f7eed3db54bb00c61c003c92e1b1c38d30eefa6a680cba73b7cf28de3c2181bb82b25e40662f

  • C:\Users\Admin\AppData\Local\Temp\VLC2.exe
    MD5

    e2da4f42475e01f7961ef2fb929de54e

    SHA1

    e57df765da7135d578b29e4619cc395a729eb757

    SHA256

    488c59fddf2db00da7fb4d6589183adc7396edc4233f23eb950aa7191fe4366e

    SHA512

    08cf988be2b1d4214812477759bf273e1281d762491d5eb40ed77c95ad701a08fce0d5a67b7d2163389e0efa96422dd535d1062ecb345ac6054688e38eb6e2a0

  • C:\Users\Admin\AppData\Local\Temp\VLC2.exe
    MD5

    e2da4f42475e01f7961ef2fb929de54e

    SHA1

    e57df765da7135d578b29e4619cc395a729eb757

    SHA256

    488c59fddf2db00da7fb4d6589183adc7396edc4233f23eb950aa7191fe4366e

    SHA512

    08cf988be2b1d4214812477759bf273e1281d762491d5eb40ed77c95ad701a08fce0d5a67b7d2163389e0efa96422dd535d1062ecb345ac6054688e38eb6e2a0

  • C:\Users\Admin\AppData\Local\Temp\tmp64E5.tmp.bat
    MD5

    13d072b787c9e6982b18aba972971900

    SHA1

    9013fbfa37c5c15d4ce18233b81b441068e8e5ce

    SHA256

    61dcb96e03332af93eeebc05d3fe1f75315cc5373dd77f1a574932d42dac1ca1

    SHA512

    2c8bc9d595f51bba9c9e122f94e953f6f298a0cb7ae617a989b43fb6752aeabeebf3ecec5a1d563cd653f7f9caf3851614278bac2cb10c5ee6450e468617a62a

  • memory/200-52-0x0000000000000000-mapping.dmp
  • memory/200-53-0x0000000000000000-mapping.dmp
  • memory/200-56-0x0000000071C10000-0x00000000722FE000-memory.dmp
    Filesize

    6.9MB

  • memory/1008-46-0x0000000000000000-mapping.dmp
  • memory/1080-32-0x0000000000000000-mapping.dmp
  • memory/1080-40-0x0000000000650000-0x0000000000651000-memory.dmp
    Filesize

    4KB

  • memory/1080-38-0x0000000071C10000-0x00000000722FE000-memory.dmp
    Filesize

    6.9MB

  • memory/1080-50-0x0000000005050000-0x0000000005051000-memory.dmp
    Filesize

    4KB

  • memory/1080-51-0x0000000005490000-0x0000000005491000-memory.dmp
    Filesize

    4KB

  • memory/1172-13-0x00000000004487CE-mapping.dmp
  • memory/1172-15-0x0000000073550000-0x0000000073C3E000-memory.dmp
    Filesize

    6.9MB

  • memory/1172-12-0x0000000000400000-0x000000000044E000-memory.dmp
    Filesize

    312KB

  • memory/1228-30-0x0000000000000000-mapping.dmp
  • memory/1228-34-0x0000000071C10000-0x00000000722FE000-memory.dmp
    Filesize

    6.9MB

  • memory/1228-37-0x0000000000BC0000-0x0000000000BC1000-memory.dmp
    Filesize

    4KB

  • memory/1404-9-0x0000000007950000-0x0000000007951000-memory.dmp
    Filesize

    4KB

  • memory/1404-10-0x0000000005920000-0x000000000592E000-memory.dmp
    Filesize

    56KB

  • memory/1404-3-0x0000000000B30000-0x0000000000B31000-memory.dmp
    Filesize

    4KB

  • memory/1404-2-0x0000000073550000-0x0000000073C3E000-memory.dmp
    Filesize

    6.9MB

  • memory/1404-5-0x0000000005950000-0x0000000005951000-memory.dmp
    Filesize

    4KB

  • memory/1404-6-0x0000000005450000-0x0000000005451000-memory.dmp
    Filesize

    4KB

  • memory/1404-7-0x0000000005400000-0x0000000005401000-memory.dmp
    Filesize

    4KB

  • memory/1404-11-0x0000000007240000-0x00000000072BD000-memory.dmp
    Filesize

    500KB

  • memory/1404-8-0x0000000007DE0000-0x0000000007DE1000-memory.dmp
    Filesize

    4KB

  • memory/1576-45-0x0000000000000000-mapping.dmp
  • memory/2756-28-0x0000000000640000-0x0000000000641000-memory.dmp
    Filesize

    4KB

  • memory/2756-25-0x00007FFB59970000-0x00007FFB5A35C000-memory.dmp
    Filesize

    9.9MB

  • memory/2756-21-0x0000000000000000-mapping.dmp
  • memory/3828-48-0x0000000000000000-mapping.dmp
  • memory/3852-24-0x0000000000000000-mapping.dmp
  • memory/3944-49-0x0000000000000000-mapping.dmp