agenttesla | d05bfd0a97e1329dc7067b9a8c1bcdfe8949aa3464b4946fefc5f70b766c63d9

Analysis

max time kernel
70s
max time network
149s
platform
windows7_x64
resource
win7-20220414-en
submitted
29/04/2022, 15:43

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General

Target
IN02672Q583765NBOM.exe
Size 528KB
Sample220429-s5w2msbeh8
SHA256 cb0f4f24128a1cafefc585f656a619c472af535d17eeb00e543ef660abdd0960
MD5 c6bf677c01ddb85fe6af950c4f6a1822
SHA1 34796dbf7b49b34b55728cf6a59e5d4412a3efdd
SHA512 4b29275c77800ecd93058071b2ef34ca8be85e6b66ecb64e3fd30cd494664b3cd3641a3646345185d70ce56bcfab5be81af499830f2555546de547031b8bd85f
MD5 SHA1 SHA512

Score

10^/10

agenttesla collection keylogger persistence spyware stealer suricata trojan

Malware Config

Extracted

Credentials

Protocol
smtp
Host
mail.contrivekota.in
Port
587
Username
[email protected]
Password
Contrive123$

Extracted

Family

agenttesla

Credentials

Protocol
smtp
Host
mail.contrivekota.in
Port
587
Username
[email protected]
Password
Contrive123$
Email to
[email protected]

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla
suricata: ET MALWARE AgentTesla Exfil Via SMTP
suricata: ET MALWARE AgentTesla Exfil Via SMTP
suricata

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	IN02672Q583765NBOM.exe

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

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 stealer

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 stealer

Data from Local System
T1005

Credentials in Files
T1081

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	IN02672Q583765NBOM.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	IN02672Q583765NBOM.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	IN02672Q583765NBOM.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows\CurrentVersion\Run\yqWDN = "C:\\Users\\Admin\\AppData\\Roaming\\yqWDN\\yqWDN.exe"	IN02672Q583765NBOM.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1944 set thread context of 1520	1944	IN02672Q583765NBOM.exe	29

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

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

persistence

Scheduled Task

T1053

pid	Process
1304	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1944	IN02672Q583765NBOM.exe
1520	IN02672Q583765NBOM.exe
1520	IN02672Q583765NBOM.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1944	IN02672Q583765NBOM.exe
Token: SeDebugPrivilege	1520	IN02672Q583765NBOM.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 1944 wrote to memory of 1304	1944	IN02672Q583765NBOM.exe	27
PID 1944 wrote to memory of 1304	1944	IN02672Q583765NBOM.exe	27
PID 1944 wrote to memory of 1304	1944	IN02672Q583765NBOM.exe	27
PID 1944 wrote to memory of 1304	1944	IN02672Q583765NBOM.exe	27
PID 1944 wrote to memory of 1520	1944	IN02672Q583765NBOM.exe	29
PID 1944 wrote to memory of 1520	1944	IN02672Q583765NBOM.exe	29
PID 1944 wrote to memory of 1520	1944	IN02672Q583765NBOM.exe	29
PID 1944 wrote to memory of 1520	1944	IN02672Q583765NBOM.exe	29
PID 1944 wrote to memory of 1520	1944	IN02672Q583765NBOM.exe	29
PID 1944 wrote to memory of 1520	1944	IN02672Q583765NBOM.exe	29
PID 1944 wrote to memory of 1520	1944	IN02672Q583765NBOM.exe	29
PID 1944 wrote to memory of 1520	1944	IN02672Q583765NBOM.exe	29
PID 1944 wrote to memory of 1520	1944	IN02672Q583765NBOM.exe	29

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	IN02672Q583765NBOM.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	IN02672Q583765NBOM.exe

C:\Users\Admin\AppData\Local\Temp\IN02672Q583765NBOM.exe
"C:\Users\Admin\AppData\Local\Temp\IN02672Q583765NBOM.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1944
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\CBSYBvHKt" /XML "C:\Users\Admin\AppData\Local\Temp\tmp872B.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1304
- C:\Users\Admin\AppData\Local\Temp\IN02672Q583765NBOM.exe
  "{path}"
  2⤵
  - Drops file in Drivers directory
  - Accesses Microsoft Outlook profiles
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:1520

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

tmp872B.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmp872B.tmp
Size 1KB
SHA256 3cba5d1a1a6ee9365d0c4253008a17f128f0e5ada73cc17bf27a7e78bc691bd9
MD5 fb748c6466c9e332922542355ec630b6
SHA1 65cd99453960bd55c8e98960d114aabe6abb28da
SHA512 5e50bc67b88e72b1a4b9dc1b763082081e172cb40416a83dec448bb8611d5c0e2717a311628a0560072756202e0c61abf4171752d21abca5f014a34e79c2fb50
MD5 SHA1 SHA512

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memory/1520-64-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/1520-61-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/1520-62-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/1520-65-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/1520-66-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/1520-69-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/1520-71-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/1944-57-0x0000000005AF0000-0x0000000005B74000-memory.dmp

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memory/1944-58-0x0000000004DF0000-0x0000000004E2A000-memory.dmp

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memory/1944-56-0x0000000000500000-0x000000000050A000-memory.dmp

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memory/1944-55-0x0000000075441000-0x0000000075443000-memory.dmp

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memory/1944-54-0x00000000010F0000-0x000000000117A000-memory.dmp

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