agenttesla | 014b3137818fe9c6b66f870dfb5a2d59ea9e78ef414cb28dae5142e9eeb1736c

General

Target
PO 90138.doc
Size 1.2MB
Sample201215-wbkp6vr4vx
SHA256 014b3137818fe9c6b66f870dfb5a2d59ea9e78ef414cb28dae5142e9eeb1736c
MD5 ef557356b0d4235686935f0ee636c3ae
SHA1 fbb7dc531d99fb091f7a065e942c17913af5196d
SHA512 2878594eb8003173865c7f1e194c40f871fada1f2711edcbcf8d4fda83fb8dba6670a742a0550efdef72806139d73f1bb740a4b537c352ffe90ab952742e43bb
MD5 SHA1 SHA512

Score

10^/10

agenttesla keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol
smtp
Host
mail.innervisioninterior.com
Port
587
Username
[email protected]
Password
#Up}oHhh,ZQ{

Signatures

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

AgentTesla Payload 4 IoCs

resource	yara_rule
behavioral1/memory/340-13-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral1/memory/340-14-0x000000000043744E-mapping.dmp	family_agenttesla
behavioral1/memory/340-16-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral1/memory/340-17-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla

Blocklisted process makes network request 1 IoCs

flow	pid	Process
6	848	EQNEDT32.EXE

Executes dropped EXE 2 IoCs

pid	Process
1204	brown83886.scr
340	brown83886.scr

Loads dropped DLL 2 IoCs

pid	Process
848	EQNEDT32.EXE
848	EQNEDT32.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 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Windows\CurrentVersion\Run\chrome = "C:\\Users\\Admin\\AppData\\Roaming\\chrome\\chrome.exe"	brown83886.scr

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1204 set thread context of 340	1204	brown83886.scr	35

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Debug\WIA\wiatrace.log	WINWORD.EXE

Office loads VBA resources, possible macro or embedded object present

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
848	EQNEDT32.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\Toolbar	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	WINWORD.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	WINWORD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1684	WINWORD.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
340	brown83886.scr
340	brown83886.scr

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	340	brown83886.scr

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1684	WINWORD.EXE
1684	WINWORD.EXE
340	brown83886.scr

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 848 wrote to memory of 1204	848	EQNEDT32.EXE	32
PID 848 wrote to memory of 1204	848	EQNEDT32.EXE	32
PID 848 wrote to memory of 1204	848	EQNEDT32.EXE	32
PID 848 wrote to memory of 1204	848	EQNEDT32.EXE	32
PID 1204 wrote to memory of 340	1204	brown83886.scr	35
PID 1204 wrote to memory of 340	1204	brown83886.scr	35
PID 1204 wrote to memory of 340	1204	brown83886.scr	35
PID 1204 wrote to memory of 340	1204	brown83886.scr	35
PID 1204 wrote to memory of 340	1204	brown83886.scr	35
PID 1204 wrote to memory of 340	1204	brown83886.scr	35
PID 1204 wrote to memory of 340	1204	brown83886.scr	35
PID 1204 wrote to memory of 340	1204	brown83886.scr	35
PID 1204 wrote to memory of 340	1204	brown83886.scr	35

C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\PO 90138.doc"
1⤵
- Drops file in Windows directory
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:1684

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
- Launches Equation Editor
- Suspicious use of WriteProcessMemory
PID:848
- C:\Users\Admin\AppData\Roaming\brown83886.scr
  "C:\Users\Admin\AppData\Roaming\brown83886.scr"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:1204
- - C:\Users\Admin\AppData\Roaming\brown83886.scr
    "C:\Users\Admin\AppData\Roaming\brown83886.scr"
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:340

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Exploitation for Client Execution

1

T1203

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Credentials in Files

3

T1081

Discovery

Lateral Movement

Collection

Data from Local System

3

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/340-13-0x0000000000400000-0x000000000043C000-memory.dmp

Download

memory/340-16-0x0000000000400000-0x000000000043C000-memory.dmp

Download

memory/340-17-0x0000000000400000-0x000000000043C000-memory.dmp

Download

memory/340-18-0x000000006A3B0000-0x000000006AA9E000-memory.dmp

Download

memory/1204-9-0x000000006AE70000-0x000000006B55E000-memory.dmp

Download

memory/1204-10-0x0000000001350000-0x0000000001351000-memory.dmp

Download

memory/1204-12-0x0000000000590000-0x00000000005CD000-memory.dmp

Download

memory/1568-3-0x000007FEF7080000-0x000007FEF72FA000-memory.dmp

Download

memory/1684-2-0x0000000002270000-0x0000000002274000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads