agenttesla | fc60c2d2f89eed099d1b41eb4ed7912549f3e00b8fdd7d7de1ef86e67e619550

General

Target
JNKI-044-PO-038.doc
Size 322KB
Sample201215-zpe31jmfvs
SHA256 fc60c2d2f89eed099d1b41eb4ed7912549f3e00b8fdd7d7de1ef86e67e619550
MD5 7b391b4c09dc702cecfb2507b3d88bd4
SHA1 b7efc645a734abc0f04b17cc8faff1e948b923ae
SHA512 f33fc7a045cd304fd25d94b9df7c88f1c8e6e08f663fc73e774844b244ac680e11735aba6000fa5ce85d4ee2cca835e82f650cec37e02fb7121dfc5c94874898
MD5 SHA1 SHA512

Score

10^/10

agenttesla keylogger spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol
smtp
Host
mail.hkoffice365.com
Port
587
Username
[email protected]
Password
Xr,*=y$V63wm

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/1692-14-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral1/memory/1692-15-0x000000000043765E-mapping.dmp	family_agenttesla
behavioral1/memory/1692-17-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral1/memory/1692-18-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla

Blocklisted process makes network request 1 IoCs

flow	pid	Process
5	904	EQNEDT32.EXE

Executes dropped EXE 2 IoCs

pid	Process
1012	ATR.exe
1692	ATR.exe

Loads dropped DLL 2 IoCs

pid	Process
904	EQNEDT32.EXE
904	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

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
8	api.ipify.org
9	api.ipify.org

Suspicious use of NtSetInformationThreadHideFromDebugger 12 IoCs

pid	Process
1012	ATR.exe
1012	ATR.exe
1012	ATR.exe
1012	ATR.exe
1012	ATR.exe
1012	ATR.exe
1012	ATR.exe
1012	ATR.exe
1012	ATR.exe
1012	ATR.exe
1012	ATR.exe
1012	ATR.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1012 set thread context of 1692	1012	ATR.exe	38

Drops file in Windows directory 1 IoCs

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

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

System Information Discovery
T1082
Office loads VBA resources, possible macro or embedded object present

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1100	timeout.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
904	EQNEDT32.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	WINWORD.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\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-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt	WINWORD.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	WINWORD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
648	WINWORD.EXE

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
1012	ATR.exe
1012	ATR.exe
1012	ATR.exe
1692	ATR.exe
1692	ATR.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1012	ATR.exe
Token: SeDebugPrivilege	1692	ATR.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
648	WINWORD.EXE
648	WINWORD.EXE
1692	ATR.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 904 wrote to memory of 1012	904	EQNEDT32.EXE	32
PID 904 wrote to memory of 1012	904	EQNEDT32.EXE	32
PID 904 wrote to memory of 1012	904	EQNEDT32.EXE	32
PID 904 wrote to memory of 1012	904	EQNEDT32.EXE	32
PID 1012 wrote to memory of 660	1012	ATR.exe	33
PID 1012 wrote to memory of 660	1012	ATR.exe	33
PID 1012 wrote to memory of 660	1012	ATR.exe	33
PID 1012 wrote to memory of 660	1012	ATR.exe	33
PID 660 wrote to memory of 1100	660	cmd.exe	36
PID 660 wrote to memory of 1100	660	cmd.exe	36
PID 660 wrote to memory of 1100	660	cmd.exe	36
PID 660 wrote to memory of 1100	660	cmd.exe	36
PID 1012 wrote to memory of 1692	1012	ATR.exe	38
PID 1012 wrote to memory of 1692	1012	ATR.exe	38
PID 1012 wrote to memory of 1692	1012	ATR.exe	38
PID 1012 wrote to memory of 1692	1012	ATR.exe	38
PID 1012 wrote to memory of 1692	1012	ATR.exe	38
PID 1012 wrote to memory of 1692	1012	ATR.exe	38
PID 1012 wrote to memory of 1692	1012	ATR.exe	38
PID 1012 wrote to memory of 1692	1012	ATR.exe	38
PID 1012 wrote to memory of 1692	1012	ATR.exe	38

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\JNKI-044-PO-038.doc"
1⤵
- Drops file in Windows directory
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:648

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:904
- C:\Users\Admin\AppData\Roaming\ATR.exe
  C:\Users\Admin\AppData\Roaming\ATR.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1012
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout 4.246
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:660
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 4.246
      4⤵
      Delays execution with timeout.exe
      PID:1100
- - C:\Users\Admin\AppData\Roaming\ATR.exe
    "C:\Users\Admin\AppData\Roaming\ATR.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:1692

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Exploitation for Client Execution

1

T1203

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials in Files

3

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

3

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/1012-13-0x0000000000D20000-0x0000000000D67000-memory.dmp

Download

memory/1012-9-0x0000000000FC0000-0x0000000000FC1000-memory.dmp

Download

memory/1012-8-0x000000006B250000-0x000000006B93E000-memory.dmp

Download

memory/1620-2-0x000007FEF77E0000-0x000007FEF7A5A000-memory.dmp

Download

memory/1692-14-0x0000000000400000-0x000000000043C000-memory.dmp

Download

memory/1692-17-0x0000000000400000-0x000000000043C000-memory.dmp

Download

memory/1692-18-0x0000000000400000-0x000000000043C000-memory.dmp

Download

memory/1692-19-0x000000006B250000-0x000000006B93E000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads