agenttesla | ba3d19fdb5b0ad759b64b9871bc02d6bbd3cd8e01ce21d489f3fff9f2fab7ea9

General

Target
Product list.doc
Size 673KB
Sample201216-dhsfrpf9kx
SHA256 ba3d19fdb5b0ad759b64b9871bc02d6bbd3cd8e01ce21d489f3fff9f2fab7ea9
MD5 f052854caba7b88a51f58ff9944c17da
SHA1 fb811e5d7a93b61c42be3995fb1749fc7671736b
SHA512 918e3af9235fb4cb1585a80d8c85c694b168e7be24c0ed3c898f3abd00d3b472a5624fff5e4c2c394b7d474d15360920d8b06d9e90ba87a3a8f285c76efc4e9d
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/840-15-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral1/memory/840-16-0x000000000043765E-mapping.dmp	family_agenttesla
behavioral1/memory/840-18-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral1/memory/840-19-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla

Blocklisted process makes network request 1 IoCs

flow	pid	Process
6	1996	EQNEDT32.EXE

Executes dropped EXE 3 IoCs

pid	Process
308	ADC.exe
676	ADC.exe
840	ADC.exe

Loads dropped DLL 2 IoCs

pid	Process
1996	EQNEDT32.EXE
1996	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
9	api.ipify.org
10	api.ipify.org

Suspicious use of NtSetInformationThreadHideFromDebugger 13 IoCs

pid	Process
308	ADC.exe
308	ADC.exe
308	ADC.exe
308	ADC.exe
308	ADC.exe
308	ADC.exe
308	ADC.exe
308	ADC.exe
308	ADC.exe
308	ADC.exe
308	ADC.exe
308	ADC.exe
308	ADC.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 308 set thread context of 840	308	ADC.exe	39

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
1916	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
1996	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\Toolbar	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt	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
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
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 (int)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	WINWORD.EXE
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 (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
1924	WINWORD.EXE

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
308	ADC.exe
308	ADC.exe
308	ADC.exe
308	ADC.exe
308	ADC.exe
840	ADC.exe
840	ADC.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	308	ADC.exe
Token: SeDebugPrivilege	840	ADC.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1924	WINWORD.EXE
1924	WINWORD.EXE
840	ADC.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 1996 wrote to memory of 308	1996	EQNEDT32.EXE	32
PID 1996 wrote to memory of 308	1996	EQNEDT32.EXE	32
PID 1996 wrote to memory of 308	1996	EQNEDT32.EXE	32
PID 1996 wrote to memory of 308	1996	EQNEDT32.EXE	32
PID 308 wrote to memory of 552	308	ADC.exe	33
PID 308 wrote to memory of 552	308	ADC.exe	33
PID 308 wrote to memory of 552	308	ADC.exe	33
PID 308 wrote to memory of 552	308	ADC.exe	33
PID 552 wrote to memory of 1916	552	cmd.exe	36
PID 552 wrote to memory of 1916	552	cmd.exe	36
PID 552 wrote to memory of 1916	552	cmd.exe	36
PID 552 wrote to memory of 1916	552	cmd.exe	36
PID 308 wrote to memory of 676	308	ADC.exe	38
PID 308 wrote to memory of 676	308	ADC.exe	38
PID 308 wrote to memory of 676	308	ADC.exe	38
PID 308 wrote to memory of 676	308	ADC.exe	38
PID 308 wrote to memory of 840	308	ADC.exe	39
PID 308 wrote to memory of 840	308	ADC.exe	39
PID 308 wrote to memory of 840	308	ADC.exe	39
PID 308 wrote to memory of 840	308	ADC.exe	39
PID 308 wrote to memory of 840	308	ADC.exe	39
PID 308 wrote to memory of 840	308	ADC.exe	39
PID 308 wrote to memory of 840	308	ADC.exe	39
PID 308 wrote to memory of 840	308	ADC.exe	39
PID 308 wrote to memory of 840	308	ADC.exe	39

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\Product list.doc"
1⤵
- Drops file in Windows directory
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:1924

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:1996
- C:\Users\Admin\AppData\Roaming\ADC.exe
  C:\Users\Admin\AppData\Roaming\ADC.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:308
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout 4.104
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:552
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 4.104
      4⤵
      Delays execution with timeout.exe
      PID:1916
- - C:\Users\Admin\AppData\Roaming\ADC.exe
    "C:\Users\Admin\AppData\Roaming\ADC.exe"
    3⤵
    - Executes dropped EXE
    PID:676
- - C:\Users\Admin\AppData\Roaming\ADC.exe
    "C:\Users\Admin\AppData\Roaming\ADC.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:840

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/308-13-0x0000000000520000-0x0000000000565000-memory.dmp

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memory/308-8-0x000000006B440000-0x000000006BB2E000-memory.dmp

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memory/308-9-0x0000000000CE0000-0x0000000000CE1000-memory.dmp

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memory/840-15-0x0000000000400000-0x000000000043C000-memory.dmp

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memory/840-18-0x0000000000400000-0x000000000043C000-memory.dmp

Download

memory/840-19-0x0000000000400000-0x000000000043C000-memory.dmp

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memory/840-20-0x000000006B440000-0x000000006BB2E000-memory.dmp

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memory/1792-2-0x000007FEF6680000-0x000007FEF68FA000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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