General

  • Target

    4409RI100080 SWIFTMSG.TXT.exe

  • Size

    458KB

  • Sample

    211202-nqkb3sfecl

  • MD5

    ee8a0fc4071663b4c7f8524a896b302a

  • SHA1

    27b2da6630e2a684379ef8c16568857070a2a15c

  • SHA256

    f07fc5f31e955fb3c7fc9d9c5a7eff013b987916aa18c60c1b3ff80db344c9ab

  • SHA512

    a6c17a2f0046c4c8a36613f345a881c1692caec5e39b23f0aa4f8de0759cf4184a47a51d70e215021e90db64fb568c02cd9bd56961a5b390cbd56fcb8c410e58

Malware Config

Extracted

Family

agenttesla

C2

https://api.telegram.org/bot1338829993:AAGkgJ80sLaIYwBfp79Ps5EtdSP1XH6jBV8/sendDocument

Targets

    • Target

      4409RI100080 SWIFTMSG.TXT.exe

    • Size

      458KB

    • MD5

      ee8a0fc4071663b4c7f8524a896b302a

    • SHA1

      27b2da6630e2a684379ef8c16568857070a2a15c

    • SHA256

      f07fc5f31e955fb3c7fc9d9c5a7eff013b987916aa18c60c1b3ff80db344c9ab

    • SHA512

      a6c17a2f0046c4c8a36613f345a881c1692caec5e39b23f0aa4f8de0759cf4184a47a51d70e215021e90db64fb568c02cd9bd56961a5b390cbd56fcb8c410e58

    • AgentTesla

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

    • AgentTesla Payload

    • Looks for VirtualBox Guest Additions in registry

    • Looks for VMWare Tools registry key

    • Checks BIOS information in registry

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

    • Reads user/profile data of local email clients

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

    • Reads user/profile data of web browsers

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

    • Accesses Microsoft Outlook profiles

    • Adds Run key to start application

    • Maps connected drives based on registry

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

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Virtualization/Sandbox Evasion

2
T1497

Modify Registry

1
T1112

Credential Access

Credentials in Files

2
T1081

Discovery

Query Registry

4
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

2
T1082

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

2
T1005

Email Collection

1
T1114

Tasks