Analysis

  • max time kernel
    150s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    30-06-2022 17:08

General

  • Target

    18d5927d197f41af4d9b16621b0515a6.exe

  • Size

    172KB

  • MD5

    18d5927d197f41af4d9b16621b0515a6

  • SHA1

    d2f4345de440d781b22f3ecf5b922783b4264bdd

  • SHA256

    613113ce85195ad4ee1d48d212424be5719d697429f2cfe422752e056d2236c0

  • SHA512

    60dde5e043e91469135829aa1590d7e505644fa22a675a205e5cc40e507b27b06e6fcfcc418b72fc8752a788ce51fd8ee3919fa4534ae94bf889db948b50e24b

Malware Config

Extracted

Family

agenttesla

C2

http://136.144.41.76/bray/inc/a4a9ffb236214a.php

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

127.0.0.1:1111

62.197.136.167:6606

62.197.136.167:7707

62.197.136.167:8808

62.197.136.167:1111

Mutex

AsyncMutex_6SI8OkPnk

Attributes
  • delay

    3

  • install

    false

  • install_folder

    %AppData%

aes.plain

Signatures

  • AgentTesla

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

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers.

  • suricata: ET MALWARE AgentTesla Communicating with CnC Server

    suricata: ET MALWARE AgentTesla Communicating with CnC Server

  • suricata: ET MALWARE Generic AsyncRAT Style SSL Cert

    suricata: ET MALWARE Generic AsyncRAT Style SSL Cert

  • suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)

    suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)

  • Async RAT payload 6 IoCs
  • Drops file in Drivers directory 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 8 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 44 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\18d5927d197f41af4d9b16621b0515a6.exe
    "C:\Users\Admin\AppData\Local\Temp\18d5927d197f41af4d9b16621b0515a6.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1936
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1276
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMQAxAA==
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1096
    • C:\Users\Admin\AppData\Local\Temp\Crstwuze5m.exe
      "C:\Users\Admin\AppData\Local\Temp\Crstwuze5m.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1152
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1164
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMQAxAA==
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1416
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1192
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
      C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
      2⤵
      • Drops file in Drivers directory
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • outlook_office_path
      • outlook_win_path
      PID:1832

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

1
T1112

Discovery

System Information Discovery

1
T1082

Collection

Email Collection

1
T1114

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\Crstwuze5m.exe
    Filesize

    172KB

    MD5

    982f97ccf89f9d50dbc5d152c7139a50

    SHA1

    0ba6c448dd8566a1196e642ef1d834d55bf6e3e6

    SHA256

    f41360c7779e6656ec89fdfa40ae58b619d80dd27286802a9e902ab9dde19152

    SHA512

    c51127261b13e135e183c779c2bc10b5f43a2e27ccfd902829abc215beddd2070cf3739ac810201ae4eaf98dc9afab9b5e6923e97b1ca7bd0c7e661706c08fd1

  • C:\Users\Admin\AppData\Local\Temp\Crstwuze5m.exe
    Filesize

    172KB

    MD5

    982f97ccf89f9d50dbc5d152c7139a50

    SHA1

    0ba6c448dd8566a1196e642ef1d834d55bf6e3e6

    SHA256

    f41360c7779e6656ec89fdfa40ae58b619d80dd27286802a9e902ab9dde19152

    SHA512

    c51127261b13e135e183c779c2bc10b5f43a2e27ccfd902829abc215beddd2070cf3739ac810201ae4eaf98dc9afab9b5e6923e97b1ca7bd0c7e661706c08fd1

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms
    Filesize

    7KB

    MD5

    d9e405d9941852c2ae79beb3c25a7eda

    SHA1

    b9c4e9e2690b9d2c3116bfaa452870de6c930b3c

    SHA256

    77434c61e67274ccddf9422a7e2723b6c30fccaeef2609977b2b5524353f05f6

    SHA512

    0e0d1c32a9a7a1fb1960ff42a4c894ce734c129ff7ee22457a96328d4fbb4fc95ad11ac32761389127f5d3db3114d058a5a76973766762dadaf07dfcf00dc6bf

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms
    Filesize

    7KB

    MD5

    d9e405d9941852c2ae79beb3c25a7eda

    SHA1

    b9c4e9e2690b9d2c3116bfaa452870de6c930b3c

    SHA256

    77434c61e67274ccddf9422a7e2723b6c30fccaeef2609977b2b5524353f05f6

    SHA512

    0e0d1c32a9a7a1fb1960ff42a4c894ce734c129ff7ee22457a96328d4fbb4fc95ad11ac32761389127f5d3db3114d058a5a76973766762dadaf07dfcf00dc6bf

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms
    Filesize

    7KB

    MD5

    d9e405d9941852c2ae79beb3c25a7eda

    SHA1

    b9c4e9e2690b9d2c3116bfaa452870de6c930b3c

    SHA256

    77434c61e67274ccddf9422a7e2723b6c30fccaeef2609977b2b5524353f05f6

    SHA512

    0e0d1c32a9a7a1fb1960ff42a4c894ce734c129ff7ee22457a96328d4fbb4fc95ad11ac32761389127f5d3db3114d058a5a76973766762dadaf07dfcf00dc6bf

  • C:\Users\Admin\AppData\Roaming\Tupbtqbro\Aeigqqh.exe
    Filesize

    172KB

    MD5

    982f97ccf89f9d50dbc5d152c7139a50

    SHA1

    0ba6c448dd8566a1196e642ef1d834d55bf6e3e6

    SHA256

    f41360c7779e6656ec89fdfa40ae58b619d80dd27286802a9e902ab9dde19152

    SHA512

    c51127261b13e135e183c779c2bc10b5f43a2e27ccfd902829abc215beddd2070cf3739ac810201ae4eaf98dc9afab9b5e6923e97b1ca7bd0c7e661706c08fd1

  • \??\PIPE\srvsvc
    MD5

    d41d8cd98f00b204e9800998ecf8427e

    SHA1

    da39a3ee5e6b4b0d3255bfef95601890afd80709

    SHA256

    e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

    SHA512

    cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

  • \Users\Admin\AppData\Local\Temp\Crstwuze5m.exe
    Filesize

    172KB

    MD5

    982f97ccf89f9d50dbc5d152c7139a50

    SHA1

    0ba6c448dd8566a1196e642ef1d834d55bf6e3e6

    SHA256

    f41360c7779e6656ec89fdfa40ae58b619d80dd27286802a9e902ab9dde19152

    SHA512

    c51127261b13e135e183c779c2bc10b5f43a2e27ccfd902829abc215beddd2070cf3739ac810201ae4eaf98dc9afab9b5e6923e97b1ca7bd0c7e661706c08fd1

  • memory/1096-66-0x000000006F580000-0x000000006FB2B000-memory.dmp
    Filesize

    5.7MB

  • memory/1096-62-0x0000000000000000-mapping.dmp
  • memory/1096-65-0x000000006F580000-0x000000006FB2B000-memory.dmp
    Filesize

    5.7MB

  • memory/1152-68-0x0000000000000000-mapping.dmp
  • memory/1152-90-0x0000000006020000-0x00000000060E4000-memory.dmp
    Filesize

    784KB

  • memory/1152-71-0x0000000000AA0000-0x0000000000AD0000-memory.dmp
    Filesize

    192KB

  • memory/1164-76-0x000000006F580000-0x000000006FB2B000-memory.dmp
    Filesize

    5.7MB

  • memory/1164-89-0x000000006F580000-0x000000006FB2B000-memory.dmp
    Filesize

    5.7MB

  • memory/1164-73-0x0000000000000000-mapping.dmp
  • memory/1192-99-0x0000000000400000-0x0000000000412000-memory.dmp
    Filesize

    72KB

  • memory/1192-104-0x000000000040C75E-mapping.dmp
  • memory/1192-98-0x0000000000400000-0x0000000000412000-memory.dmp
    Filesize

    72KB

  • memory/1192-103-0x0000000000400000-0x0000000000412000-memory.dmp
    Filesize

    72KB

  • memory/1192-101-0x0000000000400000-0x0000000000412000-memory.dmp
    Filesize

    72KB

  • memory/1192-102-0x0000000000400000-0x0000000000412000-memory.dmp
    Filesize

    72KB

  • memory/1192-108-0x0000000000400000-0x0000000000412000-memory.dmp
    Filesize

    72KB

  • memory/1192-106-0x0000000000400000-0x0000000000412000-memory.dmp
    Filesize

    72KB

  • memory/1276-59-0x000000006F580000-0x000000006FB2B000-memory.dmp
    Filesize

    5.7MB

  • memory/1276-56-0x0000000000000000-mapping.dmp
  • memory/1276-58-0x000000006F580000-0x000000006FB2B000-memory.dmp
    Filesize

    5.7MB

  • memory/1416-96-0x000000006F580000-0x000000006FB2B000-memory.dmp
    Filesize

    5.7MB

  • memory/1416-95-0x000000006F580000-0x000000006FB2B000-memory.dmp
    Filesize

    5.7MB

  • memory/1416-91-0x0000000000000000-mapping.dmp
  • memory/1832-82-0x0000000000400000-0x000000000043A000-memory.dmp
    Filesize

    232KB

  • memory/1832-87-0x0000000000400000-0x000000000043A000-memory.dmp
    Filesize

    232KB

  • memory/1832-83-0x0000000000435D8E-mapping.dmp
  • memory/1832-85-0x0000000000400000-0x000000000043A000-memory.dmp
    Filesize

    232KB

  • memory/1832-81-0x0000000000400000-0x000000000043A000-memory.dmp
    Filesize

    232KB

  • memory/1832-80-0x0000000000400000-0x000000000043A000-memory.dmp
    Filesize

    232KB

  • memory/1832-78-0x0000000000400000-0x000000000043A000-memory.dmp
    Filesize

    232KB

  • memory/1832-77-0x0000000000400000-0x000000000043A000-memory.dmp
    Filesize

    232KB

  • memory/1936-55-0x0000000074DD1000-0x0000000074DD3000-memory.dmp
    Filesize

    8KB

  • memory/1936-60-0x0000000005C60000-0x0000000005D38000-memory.dmp
    Filesize

    864KB

  • memory/1936-61-0x00000000047A0000-0x00000000047EC000-memory.dmp
    Filesize

    304KB

  • memory/1936-54-0x0000000000D80000-0x0000000000DB0000-memory.dmp
    Filesize

    192KB