agenttesla | 472da59ada8f3b584eaaedc80e852a5156e2448a0e1a3763234dbc3a62bbfd6e

Analysis

max time kernel
145s
max time network
106s
platform
windows7_x64
resource
win7
submitted
04/08/2020, 13:19

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General

Target
SPA24173-2.jpg.exe
Size 2.6MB
Sample200804-hbld5tk3za
SHA256 472da59ada8f3b584eaaedc80e852a5156e2448a0e1a3763234dbc3a62bbfd6e
MD5 a185b2afa7a2d3027bcb7b228e713490
SHA1 a29b17a8e37667ca8a1890e27b89902d63232b2d
SHA512 d87a72d9a75f1128fde3bfc3b7b81cc97ba1dc8d54e40eded9836b7b8c8796e9f3bc94a67f1e81820b81a38c18e3b0690758456aa673561f049a3d2548ebfc65
MD5 SHA1 SHA512

Score

10^/10

agenttesla masslogger keylogger persistence ransomware spyware stealer trojan

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\E2C1E8F1FA\Log.txt

masslogger

Ransom Note

<|| v2.4.0.0 ||> User Name: Admin IP: 154.61.71.51 Location: United States Windows OS: Microsoft Windows 7 Professional 64bit Windows Serial Key: HYF8J-CVRMY-CM74G-RPHKF-PW487 CPU: Persocon Processor 2.5+ GPU: Standard VGA Graphics Adapter AV: NA Screen Resolution: 1280x720 Current Time: 8/4/2020 1:21:04 PM MassLogger Started: 8/4/2020 1:21:01 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\MassLoggerBin.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes: <|| WD Exclusion ||> Disabled <|| Binder ||> Disabled <|| Downloader ||> Disabled <|| Window Searcher ||> Disabled <|| Bot Killer ||> Disabled <|| Search And Upload ||> Disabled <|| Telegram Desktop ||> Not Installed <|| Pidgin ||> Not Installed <|| FileZilla ||> Not Installed <|| Discord Tokken ||> Not Installed <|| NordVPN ||> Not Installed <|| Outlook ||> Not Installed <|| FoxMail ||> Not Installed <|| Thunderbird ||> Not Installed <|| FireFox ||> Not Found <|| QQ Browser ||> Not Installed <|| Chromium Recovery ||> Not Installed or Not Found <|| Keylogger And Clipboard ||> NA

Extracted

Family

agenttesla

Credentials

Protocol
smtp
Host
mail.kaysarplastik.com
Port
587
Username
[email protected]
Password
abdullah123

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla
MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
stealer spyware masslogger

MassLogger Main Payload 3 IoCs

resource	yara_rule
behavioral1/files/0x00050000000131c7-19.dat	family_masslogger
behavioral1/files/0x00050000000131c7-21.dat	family_masslogger
behavioral1/files/0x00050000000131c7-22.dat	family_masslogger

MassLogger log file 1 IoCs

Detects a log file produced by MassLogger.

yara_rule
masslogger_log_file

AgentTesla Payload 3 IoCs

resource	yara_rule
behavioral1/files/0x00030000000131c8-23.dat	family_agenttesla
behavioral1/files/0x00030000000131c8-25.dat	family_agenttesla
behavioral1/files/0x00030000000131c8-26.dat	family_agenttesla

Executes dropped EXE 4 IoCs

pid	Process
1236	combo.exe
2028	InstallUtil.exe
1884	MassLoggerBin.exe
1392	newapp.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Control Panel\International\Geo\Nation	MassLoggerBin.exe

Loads dropped DLL 4 IoCs

pid	Process
1456	SPA24173-2.jpg.exe
1236	combo.exe
2028	InstallUtil.exe
2028	InstallUtil.exe

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware

Data from Local System
T1005

Credentials in Files
T1081

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Windows\CurrentVersion\Run\combo = "C:\\Windows\\system32\\pcalua.exe -a C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Templates\\combo.exe"	reg.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
4	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1236 set thread context of 2028	1236	combo.exe	30

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1884	MassLoggerBin.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
1456	SPA24173-2.jpg.exe
1456	SPA24173-2.jpg.exe
1456	SPA24173-2.jpg.exe
1236	combo.exe
1236	combo.exe
1236	combo.exe
1884	MassLoggerBin.exe
1884	MassLoggerBin.exe
1884	MassLoggerBin.exe
1884	MassLoggerBin.exe
1392	newapp.exe
1392	newapp.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1456	SPA24173-2.jpg.exe
Token: SeDebugPrivilege	1236	combo.exe
Token: SeDebugPrivilege	1884	MassLoggerBin.exe
Token: SeDebugPrivilege	1392	newapp.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1884	MassLoggerBin.exe
1392	newapp.exe

Suspicious use of WriteProcessMemory 32 IoCs

description	pid	Process	procid_target
PID 1456 wrote to memory of 1640	1456	SPA24173-2.jpg.exe	24
PID 1456 wrote to memory of 1640	1456	SPA24173-2.jpg.exe	24
PID 1456 wrote to memory of 1640	1456	SPA24173-2.jpg.exe	24
PID 1456 wrote to memory of 1640	1456	SPA24173-2.jpg.exe	24
PID 1640 wrote to memory of 1512	1640	cmd.exe	26
PID 1640 wrote to memory of 1512	1640	cmd.exe	26
PID 1640 wrote to memory of 1512	1640	cmd.exe	26
PID 1640 wrote to memory of 1512	1640	cmd.exe	26
PID 1456 wrote to memory of 1236	1456	SPA24173-2.jpg.exe	27
PID 1456 wrote to memory of 1236	1456	SPA24173-2.jpg.exe	27
PID 1456 wrote to memory of 1236	1456	SPA24173-2.jpg.exe	27
PID 1456 wrote to memory of 1236	1456	SPA24173-2.jpg.exe	27
PID 1236 wrote to memory of 2028	1236	combo.exe	30
PID 1236 wrote to memory of 2028	1236	combo.exe	30
PID 1236 wrote to memory of 2028	1236	combo.exe	30
PID 1236 wrote to memory of 2028	1236	combo.exe	30
PID 1236 wrote to memory of 2028	1236	combo.exe	30
PID 1236 wrote to memory of 2028	1236	combo.exe	30
PID 1236 wrote to memory of 2028	1236	combo.exe	30
PID 1236 wrote to memory of 2028	1236	combo.exe	30
PID 1236 wrote to memory of 2028	1236	combo.exe	30
PID 1236 wrote to memory of 2028	1236	combo.exe	30
PID 1236 wrote to memory of 2028	1236	combo.exe	30
PID 1236 wrote to memory of 2028	1236	combo.exe	30
PID 2028 wrote to memory of 1884	2028	InstallUtil.exe	31
PID 2028 wrote to memory of 1884	2028	InstallUtil.exe	31
PID 2028 wrote to memory of 1884	2028	InstallUtil.exe	31
PID 2028 wrote to memory of 1884	2028	InstallUtil.exe	31
PID 2028 wrote to memory of 1392	2028	InstallUtil.exe	32
PID 2028 wrote to memory of 1392	2028	InstallUtil.exe	32
PID 2028 wrote to memory of 1392	2028	InstallUtil.exe	32
PID 2028 wrote to memory of 1392	2028	InstallUtil.exe	32

C:\Users\Admin\AppData\Local\Temp\SPA24173-2.jpg.exe
"C:\Users\Admin\AppData\Local\Temp\SPA24173-2.jpg.exe"
1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1456
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v combo /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\combo.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1640
- - C:\Windows\SysWOW64\reg.exe
    REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v combo /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\combo.exe"
    3⤵
    - Adds Run key to start application
    PID:1512
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\combo.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\combo.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1236
- - C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
    "C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:2028
  - - C:\Users\Admin\AppData\Local\Temp\MassLoggerBin.exe
      "C:\Users\Admin\AppData\Local\Temp\MassLoggerBin.exe"
      4⤵
      Executes dropped EXE
      Checks computer location settings
      Suspicious behavior: AddClipboardFormatListener
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:1884
  - - C:\Users\Admin\AppData\Local\Temp\newapp.exe
      "C:\Users\Admin\AppData\Local\Temp\newapp.exe"
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:1392

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/2028-18-0x0000000000400000-0x0000000000552000-memory.dmp

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memory/2028-17-0x0000000000400000-0x0000000000552000-memory.dmp

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memory/2028-14-0x0000000000400000-0x0000000000552000-memory.dmp

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