agenttesla | b8e762cb476f275f788c3b8db49cd3ef3e6fbb3c8d62596a8ccc56f1bc3c54a3

General

Target

b8e762cb476f275f788c3b8db49cd3ef3e6fbb3c8d62596a8ccc56f1bc3c54a3.xlam
Size

589KB
MD5

9fe19f03b1390e3e5cb002ecccb1b640
SHA1

1cb49826edf0ea2ae0812849bceaeddea85e341f
SHA256

b8e762cb476f275f788c3b8db49cd3ef3e6fbb3c8d62596a8ccc56f1bc3c54a3
SHA512

7f5b11ae09a251bab33687f2801ba7fd296cdf643755e52bf5df04d9c1487cf5be671341709b92fb811f361874a9c281a17a6ddac604ee5307f0c1d2c11a6c03
SSDEEP

12288:N90ZXxjZrLKswQMZXyil/4ofwXWMLFFfeaXxX4K6vj:QZXrKOM8ilnOWUFfFB4K6vj

Score

10^/10

agenttesla credential_access discovery keylogger spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: ftp
Host:
ftp://ftp.stingatoareincendii.ro
Port:
21
Username:
[email protected]
Password:
3.*RYhlG)lkA

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

Blocklisted process makes network request 1 IoCs

flow	pid	Process
5	1760	EQNEDT32.EXE

Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
2696	tryyhvw6.exe

Loads dropped DLL 1 IoCs

pid	Process
1760	EQNEDT32.EXE

Looks up external IP address via web service 1 IoCs

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

flow	ioc
6	ip-api.com

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/files/0x0008000000016c73-6.dat	autoit_exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2696 set thread context of 2960	2696	tryyhvw6.exe	34

System Location Discovery: System Language Discovery 1 TTPs 4 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	tryyhvw6.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegSvcs.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	EQNEDT32.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
1760	EQNEDT32.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2196	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2960	RegSvcs.exe
2960	RegSvcs.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2696	tryyhvw6.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2960	RegSvcs.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
2696	tryyhvw6.exe
2696	tryyhvw6.exe

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
2696	tryyhvw6.exe
2696	tryyhvw6.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2196	EXCEL.EXE
2196	EXCEL.EXE
2196	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1760 wrote to memory of 2696	1760	EQNEDT32.EXE	33
PID 1760 wrote to memory of 2696	1760	EQNEDT32.EXE	33
PID 1760 wrote to memory of 2696	1760	EQNEDT32.EXE	33
PID 1760 wrote to memory of 2696	1760	EQNEDT32.EXE	33
PID 2696 wrote to memory of 2960	2696	tryyhvw6.exe	34
PID 2696 wrote to memory of 2960	2696	tryyhvw6.exe	34
PID 2696 wrote to memory of 2960	2696	tryyhvw6.exe	34
PID 2696 wrote to memory of 2960	2696	tryyhvw6.exe	34
PID 2696 wrote to memory of 2960	2696	tryyhvw6.exe	34
PID 2696 wrote to memory of 2960	2696	tryyhvw6.exe	34
PID 2696 wrote to memory of 2960	2696	tryyhvw6.exe	34
PID 2696 wrote to memory of 2960	2696	tryyhvw6.exe	34

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\b8e762cb476f275f788c3b8db49cd3ef3e6fbb3c8d62596a8ccc56f1bc3c54a3.xlam
1⤵
- System Location Discovery: System Language Discovery
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:2196

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:1760
- C:\Users\Admin\AppData\Local\Temp\tryyhvw6.exe
  C:\Users\Admin\AppData\Local\Temp\tryyhvw6.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2696
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
    C:\Users\Admin\AppData\Local\Temp\tryyhvw6.exe
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2960

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Exploitation for Client Execution

1

T1203

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\tryyhvw6.exe

Filesize
1022KB

MD5
387d4b12ac9e87b9db76589fcca2b937

SHA1
4a51340e1817d7ab2c739b1237c541b58e3b7c9a

SHA256
30d91ef269ca652f181ba1985cf2cf8a5790305927c6887e0c298c38ae87afcf

SHA512
35bd0a53169d56a12260ec280977fdf0e3c07b41baa836a931667aaaeffebad902f7fb1b61b3d33072a02823a959a54a6327aed57580b970bc0bcee464cd4f87

Download Submit
memory/2196-1-0x000000007263D000-0x0000000072648000-memory.dmp

Filesize
44KB

Download
memory/2196-0-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/2196-25-0x000000007263D000-0x0000000072648000-memory.dmp

Filesize
44KB

Download
memory/2196-27-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/2196-28-0x000000007263D000-0x0000000072648000-memory.dmp

Filesize
44KB

Download
memory/2960-22-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2960-24-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2960-23-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download

Analysis

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