agenttesla | ede0c266836e85d1ac3bc623377fda09bb0135a9746a0ecde6d7c52c7eddfc24

General

Target
MIC Taiwan RFQ.doc
Size 1.7MB
Sample201124-8dmm3cm8en
SHA256 ede0c266836e85d1ac3bc623377fda09bb0135a9746a0ecde6d7c52c7eddfc24
MD5 50fae186ae94fbff80dd36aa7b1f4ccb
SHA1 124e3f817e12c6ac42e5a4185f75fb5d62bc9513
SHA512 2132e6ee98d06084a03d9ffe66667e52122475f0e95edbadbb9acef1e8f706e4e8db344b8d6267c01f83724686a4a8387c8555d9cd4f8ed1d4b2bc200609af97
MD5 SHA1 SHA512

Score

10^/10

agenttesla keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol
smtp
Host
smtp.lettu.us
Port
587
Username
[email protected]
Password
anyanwu5050

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/1916-13-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral1/memory/1916-14-0x000000000043761E-mapping.dmp	family_agenttesla
behavioral1/memory/1916-16-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral1/memory/1916-17-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla

Blocklisted process makes network request 1 IoCs

flow	pid	Process
6	1984	EQNEDT32.EXE

Executes dropped EXE 4 IoCs

pid	Process
920	dchamp8743.exe
572	dchamp8743.exe
664	dchamp8743.exe
1916	dchamp8743.exe

Loads dropped DLL 1 IoCs

pid	Process
1984	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-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\noteped = "\"C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Start Menu\\Programs\\notepod\\noteped.exe\""	dchamp8743.exe

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
7	api.ipify.org
8	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 920 set thread context of 1916	920	dchamp8743.exe	37

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
1984	EQNEDT32.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2028	WINWORD.EXE

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
920	dchamp8743.exe
920	dchamp8743.exe
920	dchamp8743.exe
920	dchamp8743.exe
920	dchamp8743.exe
920	dchamp8743.exe
1916	dchamp8743.exe
1916	dchamp8743.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	920	dchamp8743.exe
Token: SeDebugPrivilege	1916	dchamp8743.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2028	WINWORD.EXE
2028	WINWORD.EXE
1916	dchamp8743.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1984 wrote to memory of 920	1984	EQNEDT32.EXE	32
PID 1984 wrote to memory of 920	1984	EQNEDT32.EXE	32
PID 1984 wrote to memory of 920	1984	EQNEDT32.EXE	32
PID 1984 wrote to memory of 920	1984	EQNEDT32.EXE	32
PID 920 wrote to memory of 664	920	dchamp8743.exe	35
PID 920 wrote to memory of 664	920	dchamp8743.exe	35
PID 920 wrote to memory of 664	920	dchamp8743.exe	35
PID 920 wrote to memory of 664	920	dchamp8743.exe	35
PID 920 wrote to memory of 572	920	dchamp8743.exe	36
PID 920 wrote to memory of 572	920	dchamp8743.exe	36
PID 920 wrote to memory of 572	920	dchamp8743.exe	36
PID 920 wrote to memory of 572	920	dchamp8743.exe	36
PID 920 wrote to memory of 1916	920	dchamp8743.exe	37
PID 920 wrote to memory of 1916	920	dchamp8743.exe	37
PID 920 wrote to memory of 1916	920	dchamp8743.exe	37
PID 920 wrote to memory of 1916	920	dchamp8743.exe	37
PID 920 wrote to memory of 1916	920	dchamp8743.exe	37
PID 920 wrote to memory of 1916	920	dchamp8743.exe	37
PID 920 wrote to memory of 1916	920	dchamp8743.exe	37
PID 920 wrote to memory of 1916	920	dchamp8743.exe	37
PID 920 wrote to memory of 1916	920	dchamp8743.exe	37

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\MIC Taiwan RFQ.doc"
1⤵
- Drops file in Windows directory
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:2028

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:1984
- C:\Users\Admin\AppData\Roaming\dchamp8743.exe
  "C:\Users\Admin\AppData\Roaming\dchamp8743.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:920
- - C:\Users\Admin\AppData\Roaming\dchamp8743.exe
    "C:\Users\Admin\AppData\Roaming\dchamp8743.exe"
    3⤵
    - Executes dropped EXE
    PID:664
- - C:\Users\Admin\AppData\Roaming\dchamp8743.exe
    "C:\Users\Admin\AppData\Roaming\dchamp8743.exe"
    3⤵
    - Executes dropped EXE
    PID:572
- - C:\Users\Admin\AppData\Roaming\dchamp8743.exe
    "C:\Users\Admin\AppData\Roaming\dchamp8743.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:1916

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/920-9-0x0000000000560000-0x00000000005AC000-memory.dmp

Download

memory/920-7-0x0000000000060000-0x0000000000061000-memory.dmp

Download

memory/920-10-0x0000000001F50000-0x0000000001F66000-memory.dmp

Download

memory/920-6-0x000000006B590000-0x000000006BC7E000-memory.dmp

Download

memory/1640-1-0x000007FEF6510000-0x000007FEF678A000-memory.dmp

Download

memory/1916-13-0x0000000000400000-0x000000000043C000-memory.dmp

Download

memory/1916-16-0x0000000000400000-0x000000000043C000-memory.dmp

Download

memory/1916-17-0x0000000000400000-0x000000000043C000-memory.dmp

Download

memory/1916-18-0x000000006B590000-0x000000006BC7E000-memory.dmp

Download

memory/2028-0-0x0000000003FE0000-0x0000000003FE4000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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