agenttesla | 6a0cdf63baad32236d845d0027822d4e9c67ac4f9bddd9933ada09f9811dbca5

Analysis

max time kernel
84s
max time network
66s
platform
windows7_x64
resource
win7-20220414-en
submitted
20/05/2022, 21:55

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General

Target
documents.exe
Size 791KB
Sample220520-1srkdshdfp
SHA256 6a0cdf63baad32236d845d0027822d4e9c67ac4f9bddd9933ada09f9811dbca5
MD5 425d7d79e7b8a6b79890453f242f830b
SHA1 b1dbeb640fd5853906014f923bd10ab82832c717
SHA512 51c93e7b771c09f9a1bdaaf0191598eb5a95b6cac49e2bd2ab34d613e6607dc8a6d85537494d382c85d16778298e3f25d60652542795f9158e506a4519e1ba05
MD5 SHA1 SHA512

Score

10^/10

agenttesla collection keylogger persistence spyware stealer suricata trojan

Malware Config

Extracted

Credentials

Protocol
smtp
Host
mail.subnet-group.com
Port
587
Username
[email protected]
Password
cr0cksh1t

Extracted

Family

agenttesla

Credentials

Protocol
smtp
Host
mail.subnet-group.com
Port
587
Username
[email protected]
Password
cr0cksh1t
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	RegSvcs.exe

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\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.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\Tnpak = "C:\\Users\\Admin\\AppData\\Roaming\\Tnpak\\Tnpak.exe"	RegSvcs.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 548 set thread context of 1092	548	documents.exe	31

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
1432	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
548	documents.exe
548	documents.exe
1092	RegSvcs.exe
1092	RegSvcs.exe
1468	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	548	documents.exe
Token: SeDebugPrivilege	1092	RegSvcs.exe
Token: SeDebugPrivilege	1468	powershell.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 548 wrote to memory of 1468	548	documents.exe	27
PID 548 wrote to memory of 1468	548	documents.exe	27
PID 548 wrote to memory of 1468	548	documents.exe	27
PID 548 wrote to memory of 1468	548	documents.exe	27
PID 548 wrote to memory of 1432	548	documents.exe	29
PID 548 wrote to memory of 1432	548	documents.exe	29
PID 548 wrote to memory of 1432	548	documents.exe	29
PID 548 wrote to memory of 1432	548	documents.exe	29
PID 548 wrote to memory of 1092	548	documents.exe	31
PID 548 wrote to memory of 1092	548	documents.exe	31
PID 548 wrote to memory of 1092	548	documents.exe	31
PID 548 wrote to memory of 1092	548	documents.exe	31
PID 548 wrote to memory of 1092	548	documents.exe	31
PID 548 wrote to memory of 1092	548	documents.exe	31
PID 548 wrote to memory of 1092	548	documents.exe	31
PID 548 wrote to memory of 1092	548	documents.exe	31
PID 548 wrote to memory of 1092	548	documents.exe	31
PID 548 wrote to memory of 1092	548	documents.exe	31
PID 548 wrote to memory of 1092	548	documents.exe	31
PID 548 wrote to memory of 1092	548	documents.exe	31

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	RegSvcs.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	RegSvcs.exe

C:\Users\Admin\AppData\Local\Temp\documents.exe
"C:\Users\Admin\AppData\Local\Temp\documents.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:548
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\PnxlrYrQ.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1468
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\PnxlrYrQ" /XML "C:\Users\Admin\AppData\Local\Temp\tmpB31A.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1432
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
  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:1092

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

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

tmpB31A.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmpB31A.tmp
Size 1KB
SHA256 ca6f86204dba61cf68022e8b8c1aa1d743ba2f3469c99bb8226302210cf62146
MD5 e80b89edf00fc6ced0f43644f3670e8e
SHA1 df8c3e8146ec07c4426eb185ba52f52050228c18
SHA512 5f1e47a787765eb090205ab935b8bbcdcb120e1844ecf42474bdbcb5077e04dd36d7ddf48ad0e9bb31d887ba97b1bc6f6e7b103683f299ac08a940fecd381fba
MD5 SHA1 SHA512

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memory/548-62-0x0000000002270000-0x0000000002276000-memory.dmp

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memory/548-55-0x0000000076181000-0x0000000076183000-memory.dmp

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memory/548-56-0x00000000004D0000-0x00000000004DE000-memory.dmp

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memory/548-57-0x0000000007600000-0x0000000007696000-memory.dmp

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memory/548-54-0x0000000000AF0000-0x0000000000BBA000-memory.dmp

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memory/548-63-0x00000000045E0000-0x000000000461C000-memory.dmp

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memory/1092-68-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/1092-64-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/1092-65-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/1092-67-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/1092-69-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/1092-72-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/1092-74-0x0000000000400000-0x000000000043A000-memory.dmp

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memory/1468-76-0x000000006CC80000-0x000000006D22B000-memory.dmp

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