agenttesla | 4047e8d1009ae3c5ff33ffef6a44fd1c412d95e8efd92fda99835a2df72580a4

Analysis

max time kernel
4294179s
max time network
122s
platform
windows7_x64
resource
win7-20220311-en
submitted
07/04/2022, 14:00

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General

Target
bp0.exe
Size 644KB
Sample220407-raznlsebbj
SHA256 4047e8d1009ae3c5ff33ffef6a44fd1c412d95e8efd92fda99835a2df72580a4
MD5 c18a4c9699a0d6d1e0691f46de6e9c2f
SHA1 635c684abf6e4a0a380be549cf19d468e1905d14
SHA512 47d45602b17337c44e5691e58514cc3926c6d8d87a424c9b8f9392485271659a9a8787f23d28005bc3f608565da56caa737d59d469239753cd774f273b980d13
MD5 SHA1 SHA512

Score

10^/10

agenttesla collection keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

https://api.telegram.org/bot5160342877:AAG7aI_cOY3UzpErIEUdfVUJMJszvGYLIiI/sendDocument

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla

AgentTesla Payload 6 IoCs

resource	yara_rule
behavioral1/memory/1324-63-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral1/memory/1324-64-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral1/memory/1324-65-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral1/memory/1324-66-0x000000000043775E-mapping.dmp	family_agenttesla
behavioral1/memory/1324-68-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral1/memory/1324-70-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla

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-1-5-21-2199625441-3471261906-229485034-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe
Key opened	\REGISTRY\USER\S-1-5-21-2199625441-3471261906-229485034-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe
Key opened	\REGISTRY\USER\S-1-5-21-2199625441-3471261906-229485034-1000\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-1-5-21-2199625441-3471261906-229485034-1000\Software\Microsoft\Windows\CurrentVersion\Run\NXLun = "C:\\Users\\Admin\\AppData\\Roaming\\NXLun\\NXLun.exe"	RegSvcs.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 952 set thread context of 1324	952	bp0.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
1956	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
952	bp0.exe
1324	RegSvcs.exe
1324	RegSvcs.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	952	bp0.exe
Token: SeDebugPrivilege	1324	RegSvcs.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 952 wrote to memory of 1956	952	bp0.exe	27
PID 952 wrote to memory of 1956	952	bp0.exe	27
PID 952 wrote to memory of 1956	952	bp0.exe	27
PID 952 wrote to memory of 1956	952	bp0.exe	27
PID 952 wrote to memory of 1324	952	bp0.exe	29
PID 952 wrote to memory of 1324	952	bp0.exe	29
PID 952 wrote to memory of 1324	952	bp0.exe	29
PID 952 wrote to memory of 1324	952	bp0.exe	29
PID 952 wrote to memory of 1324	952	bp0.exe	29
PID 952 wrote to memory of 1324	952	bp0.exe	29
PID 952 wrote to memory of 1324	952	bp0.exe	29
PID 952 wrote to memory of 1324	952	bp0.exe	29
PID 952 wrote to memory of 1324	952	bp0.exe	29
PID 952 wrote to memory of 1324	952	bp0.exe	29
PID 952 wrote to memory of 1324	952	bp0.exe	29
PID 952 wrote to memory of 1324	952	bp0.exe	29

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2199625441-3471261906-229485034-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2199625441-3471261906-229485034-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe

C:\Users\Admin\AppData\Local\Temp\bp0.exe
"C:\Users\Admin\AppData\Local\Temp\bp0.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:952
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ErFxlqe" /XML "C:\Users\Admin\AppData\Local\Temp\tmpB4AF.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1956
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.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:1324

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

tmpB4AF.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmpB4AF.tmp
Size 1KB
SHA256 d69109690e721852c56038fa5023404bccd71860f3678d5ff63d56433863a9bc
MD5 2a1a6e486495a03c8197ee299ea6697a
SHA1 8775fdf626df5a47f200bd070dc589dfedd5c632
SHA512 609efa1998b0be1c7079d2a158910f40736d876c187e6e8b3f087b78a0251bc01abed441a3cb10dbd4d79e1c4865aa84ec23b542cc51d0172c9a3a25f871d522
MD5 SHA1 SHA512

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memory/952-55-0x0000000000690000-0x000000000069A000-memory.dmp

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memory/952-56-0x0000000004CC0000-0x0000000004D46000-memory.dmp

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memory/952-57-0x0000000004D40000-0x0000000004D7C000-memory.dmp

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memory/952-54-0x0000000001030000-0x00000000010D8000-memory.dmp

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memory/1324-60-0x0000000000400000-0x000000000043C000-memory.dmp

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memory/1324-61-0x0000000000400000-0x000000000043C000-memory.dmp

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memory/1324-63-0x0000000000400000-0x000000000043C000-memory.dmp

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memory/1324-64-0x0000000000400000-0x000000000043C000-memory.dmp

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memory/1324-65-0x0000000000400000-0x000000000043C000-memory.dmp

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memory/1324-68-0x0000000000400000-0x000000000043C000-memory.dmp

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memory/1324-70-0x0000000000400000-0x000000000043C000-memory.dmp

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