agenttesla | d52b8e527ad35f54de8e65b0d7c324a9c1afddcd0d09e4d20ea0cb7c8b327394

General

Target

PI-90349003421.xlsx
Size

1.5MB
MD5

9a809e0f1d435948eacdf1f0fb8b8316
SHA1

aea62b0466c64967303de73085f16f40018cd44e
SHA256

d52b8e527ad35f54de8e65b0d7c324a9c1afddcd0d09e4d20ea0cb7c8b327394
SHA512

15630f6cf033f1c1fd43044c96ffe5b36593c56c9abc6d4b77d3c70b76c5ba73a1ecba679986b7e102c18b521067fc351e519102b8e74f4354babff0aac31697
SSDEEP

24576:uVuRVKY8KpiARLlSRqqCfboz6Ga73J1Tkiv9jnQIesN7Vsj5j8m4beb9I:DRYipb0Rq5f06G8PVv9jnMsNOVomFW

Score

10^/10

agenttesla collection discovery execution keylogger spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
mail.hermosanairobi.com
Port:
587
Username:
[email protected]
Password:
+efQ)lDLJF7899
Email To:
[email protected]

Signatures

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

Blocklisted process makes network request 2 IoCs

flow	pid	Process
5	2284	EQNEDT32.EXE
7	2284	EQNEDT32.EXE

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
1956	powershell.exe

Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
2312	uolofinh.exe

Loads dropped DLL 1 IoCs

pid	Process
2284	EQNEDT32.EXE

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe
Key opened	\REGISTRY\USER\S-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe
Key opened	\REGISTRY\USER\S-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\%ProgramData%\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\Windows PowerShell.lnk	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2312 set thread context of 1064	2312	uolofinh.exe	36

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	EQNEDT32.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	uolofinh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegSvcs.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor	EXCEL.EXE

Launches Equation Editor 1 TTPs 1 IoCs

Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

exploit

Exploitation for Client Execution

T1203

pid	Process
2284	EQNEDT32.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2012	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1956	powershell.exe
1064	RegSvcs.exe
1064	RegSvcs.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1064	RegSvcs.exe
Token: SeDebugPrivilege	1956	powershell.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2012	EXCEL.EXE
2012	EXCEL.EXE
2012	EXCEL.EXE

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2284 wrote to memory of 2312	2284	EQNEDT32.EXE	32
PID 2284 wrote to memory of 2312	2284	EQNEDT32.EXE	32
PID 2284 wrote to memory of 2312	2284	EQNEDT32.EXE	32
PID 2284 wrote to memory of 2312	2284	EQNEDT32.EXE	32
PID 2312 wrote to memory of 1956	2312	uolofinh.exe	34
PID 2312 wrote to memory of 1956	2312	uolofinh.exe	34
PID 2312 wrote to memory of 1956	2312	uolofinh.exe	34
PID 2312 wrote to memory of 1956	2312	uolofinh.exe	34
PID 2312 wrote to memory of 1064	2312	uolofinh.exe	36
PID 2312 wrote to memory of 1064	2312	uolofinh.exe	36
PID 2312 wrote to memory of 1064	2312	uolofinh.exe	36
PID 2312 wrote to memory of 1064	2312	uolofinh.exe	36
PID 2312 wrote to memory of 1064	2312	uolofinh.exe	36
PID 2312 wrote to memory of 1064	2312	uolofinh.exe	36
PID 2312 wrote to memory of 1064	2312	uolofinh.exe	36
PID 2312 wrote to memory of 1064	2312	uolofinh.exe	36
PID 2312 wrote to memory of 1064	2312	uolofinh.exe	36
PID 2312 wrote to memory of 1064	2312	uolofinh.exe	36
PID 2312 wrote to memory of 1064	2312	uolofinh.exe	36
PID 2312 wrote to memory of 1064	2312	uolofinh.exe	36

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegSvcs.exe

C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\PI-90349003421.xlsx
1⤵
- System Location Discovery: System Language Discovery
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:2012

C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
"C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
1⤵
- Blocklisted process makes network request
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Launches Equation Editor
- Suspicious use of WriteProcessMemory
PID:2284
- C:\Users\Admin\AppData\Local\Temp\uolofinh.exe
  C:\Users\Admin\AppData\Local\Temp\uolofinh.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2312
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\uolofinh.exe"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Drops file in System32 directory
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1956
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
    3⤵
    - Accesses Microsoft Outlook profiles
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - outlook_office_path
    - outlook_win_path
    PID:1064

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Exploitation for Client Execution

1

T1203

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\uolofinh.exe

Filesize
538KB

MD5
a1ff2ce84728942102e6ee2421fb9b0d

SHA1
a9e4c7445cbe1677228b22a5788883dbca8361cb

SHA256
c5df3baf119d9a1dcb3ea06def65a459c6072b9d6c8bc45d0cb3c772f4a74bab

SHA512
6e9c2665a69397f263b9611e201452ae5836f91fae0682ca613aa3e5e8a7dd47b52d467661cfe61cd399c44dba6b2532ba970433c20ba06c4dbf383b8a64acf0

Download Submit
memory/1064-25-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1064-29-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1064-31-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1064-27-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1064-37-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1064-35-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1064-34-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1064-33-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2012-0-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/2012-1-0x00000000725ED000-0x00000000725F8000-memory.dmp

Filesize
44KB

Download
memory/2012-23-0x00000000725ED000-0x00000000725F8000-memory.dmp

Filesize
44KB

Download
memory/2312-21-0x0000000000BC0000-0x0000000000C4C000-memory.dmp

Filesize
560KB

Download
memory/2312-24-0x0000000005260000-0x00000000052D2000-memory.dmp

Filesize
456KB

Download
memory/2312-22-0x00000000005F0000-0x0000000000602000-memory.dmp

Filesize
72KB

Download

Analysis

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