Analysis

  • max time kernel
    147s
  • max time network
    146s
  • platform
    windows10_x64
  • resource
    win10-en
  • submitted
    11-09-2021 16:46

General

  • Target

    Invoice #09747583900.exe

  • Size

    635KB

  • MD5

    027ed8a97dd1dd28cc73c9edf4ec89ab

  • SHA1

    131efcf3ee4e6f0629027066ab002355c2f20a00

  • SHA256

    81f7a0f726f4001c9e4e7d67ba9ab6c3f45139887dabe78f6e3d04dd2b0557e2

  • SHA512

    0c6b3606b56fe7662895783a1512ca62290697049230433ca645e953218bce1311e5dd970dbb30b0a575ef1e0398e5874d602c9f6313f64e2b245a02ff55d497

Malware Config

Extracted

Family

njrat

Version

v4.0

Botnet

AhKey_000_Sat

C2

cdanger492.duckdns.org:4480

Mutex

Windows

Attributes
  • reg_key

    Windows

  • splitter

    |-F-|

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Drops startup file 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Suspicious use of AdjustPrivilegeToken 25 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Invoice #09747583900.exe
    "C:\Users\Admin\AppData\Local\Temp\Invoice #09747583900.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3220
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\Evmpca" /XML "C:\Users\Admin\AppData\Local\Temp\tmpBD6A.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:3312
    • C:\Users\Admin\AppData\Local\Temp\Invoice #09747583900.exe
      "{path}"
      2⤵
      • Drops startup file
      • Suspicious use of AdjustPrivilegeToken
      PID:672

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Discovery

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Invoice #09747583900.exe.log
    MD5

    90acfd72f14a512712b1a7380c0faf60

    SHA1

    40ba4accb8faa75887e84fb8e38d598dc8cf0f12

    SHA256

    20806822f0c130b340504132c1461b589261fbbc518e468f4f90733ab514cb86

    SHA512

    29dbf85e14e60868574cb4dc9bda83d3c229fb956733d8d2557f2475ee0e690ac9c2e72f31e02284996da6906ba2dbfa382a29b04c15a2406571d8ee19ad16b9

  • C:\Users\Admin\AppData\Local\Temp\tmpBD6A.tmp
    MD5

    390b7097bb3312f6fd617f2e9aa4a60e

    SHA1

    c167d2f53c99b3f3585a0ec6fef63edbe97c3b79

    SHA256

    501c5a245c72520ec9c63c9791248da2d145904c4dd14deb4870eac1b78af849

    SHA512

    e402d43a8ca4305d8399b8988c3b69d13f0767f3b3d08de43c2a8360425935c46000a8b4bc2c93e19b494f3777894c35ba4e9b3f67f459f0de356d8ff250df2f

  • memory/672-139-0x0000000006350000-0x0000000006351000-memory.dmp
    Filesize

    4KB

  • memory/672-136-0x0000000006130000-0x0000000006131000-memory.dmp
    Filesize

    4KB

  • memory/672-130-0x000000000040839E-mapping.dmp
  • memory/672-129-0x0000000000400000-0x000000000040E000-memory.dmp
    Filesize

    56KB

  • memory/3220-120-0x00000000052F0000-0x00000000052F1000-memory.dmp
    Filesize

    4KB

  • memory/3220-123-0x0000000002B40000-0x0000000002B41000-memory.dmp
    Filesize

    4KB

  • memory/3220-124-0x0000000005260000-0x000000000526E000-memory.dmp
    Filesize

    56KB

  • memory/3220-125-0x00000000059E0000-0x0000000005A51000-memory.dmp
    Filesize

    452KB

  • memory/3220-126-0x0000000005A60000-0x0000000005A7D000-memory.dmp
    Filesize

    116KB

  • memory/3220-122-0x0000000005450000-0x0000000005451000-memory.dmp
    Filesize

    4KB

  • memory/3220-121-0x0000000005120000-0x0000000005121000-memory.dmp
    Filesize

    4KB

  • memory/3220-115-0x0000000000850000-0x0000000000851000-memory.dmp
    Filesize

    4KB

  • memory/3220-119-0x0000000009B70000-0x0000000009B71000-memory.dmp
    Filesize

    4KB

  • memory/3220-118-0x00000000095D0000-0x00000000095D1000-memory.dmp
    Filesize

    4KB

  • memory/3220-117-0x0000000005090000-0x00000000050E2000-memory.dmp
    Filesize

    328KB

  • memory/3312-127-0x0000000000000000-mapping.dmp