agenttesla | dfade43b170cbeefcb58db57df4095fb2c109f85af3dd6bc514cbf2a9d86b2b9

General

Target

RHGP0987090G.rtf
Size

7KB
MD5

a8cfd32e2bd9180b0b7bf1dcdc880f99
SHA1

8e162cf763f149ac2d6436de1808df569a75f72b
SHA256

dfade43b170cbeefcb58db57df4095fb2c109f85af3dd6bc514cbf2a9d86b2b9
SHA512

6527d65392aec4e53d8fd65f26c1a5f5169b17e6332b9362bf0202cacddc175cf8ddaaf1d8f0392100dfb6c75e582091fbf0e5235f77d427ca67c4a8120938d2
SSDEEP

48:OVcoVYEENMxQcvWvnCAJcSYl+UaOhkoq/lfwdPiLwmv7vpE8IMh7BqlEMAZRgFlk:435vibc3ksoidKLHvxIMh74l31AzOi

Score

10^/10

agenttesla discovery keylogger spyware stealer trojan upx

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: ftp
Host:
ftp://ftp.antoniomayol.com:21
Port:
21
Username:
[email protected]
Password:
cMhKDQUk1{;%

Signatures

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

Blocklisted process makes network request 1 IoCs

flow	pid	Process
5	792	EQNEDT32.EXE

Downloads MZ/PE file 1 IoCs

flow	pid	Process
5	792	EQNEDT32.EXE

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\resharing.vbs	resharing.exe

Executes dropped EXE 2 IoCs

pid	Process
2912	name.exe
2620	resharing.exe

Loads dropped DLL 5 IoCs

pid	Process
792	EQNEDT32.EXE
792	EQNEDT32.EXE
792	EQNEDT32.EXE
792	EQNEDT32.EXE
2912	name.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 2 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/memory/2912-43-0x0000000000290000-0x00000000003C8000-memory.dmp	autoit_exe
behavioral1/memory/2620-65-0x0000000001360000-0x0000000001498000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2620 set thread context of 1092	2620	resharing.exe	36

UPX packed file 6 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/files/0x0007000000018c1a-8.dat	upx
behavioral1/memory/2912-22-0x0000000000290000-0x00000000003C8000-memory.dmp	upx
behavioral1/memory/2620-45-0x0000000001360000-0x0000000001498000-memory.dmp	upx
behavioral1/memory/2912-40-0x0000000002A90000-0x0000000002BC8000-memory.dmp	upx
behavioral1/memory/2912-43-0x0000000000290000-0x00000000003C8000-memory.dmp	upx
behavioral1/memory/2620-65-0x0000000001360000-0x0000000001498000-memory.dmp	upx

Drops file in Windows directory 1 IoCs

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

System Location Discovery: System Language Discovery 1 TTPs 5 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	WINWORD.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	EQNEDT32.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	name.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	resharing.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegSvcs.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
792	EQNEDT32.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2540	WINWORD.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1092	RegSvcs.exe
1092	RegSvcs.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2620	resharing.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1092	RegSvcs.exe

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
2912	name.exe
2912	name.exe
2620	resharing.exe
2620	resharing.exe

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
2912	name.exe
2912	name.exe
2620	resharing.exe
2620	resharing.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2540	WINWORD.EXE
2540	WINWORD.EXE

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 792 wrote to memory of 2912	792	EQNEDT32.EXE	33
PID 792 wrote to memory of 2912	792	EQNEDT32.EXE	33
PID 792 wrote to memory of 2912	792	EQNEDT32.EXE	33
PID 792 wrote to memory of 2912	792	EQNEDT32.EXE	33
PID 2912 wrote to memory of 2620	2912	name.exe	35
PID 2912 wrote to memory of 2620	2912	name.exe	35
PID 2912 wrote to memory of 2620	2912	name.exe	35
PID 2912 wrote to memory of 2620	2912	name.exe	35
PID 2620 wrote to memory of 1092	2620	resharing.exe	36
PID 2620 wrote to memory of 1092	2620	resharing.exe	36
PID 2620 wrote to memory of 1092	2620	resharing.exe	36
PID 2620 wrote to memory of 1092	2620	resharing.exe	36
PID 2620 wrote to memory of 1092	2620	resharing.exe	36
PID 2620 wrote to memory of 1092	2620	resharing.exe	36
PID 2620 wrote to memory of 1092	2620	resharing.exe	36
PID 2620 wrote to memory of 1092	2620	resharing.exe	36
PID 2540 wrote to memory of 1988	2540	WINWORD.EXE	38
PID 2540 wrote to memory of 1988	2540	WINWORD.EXE	38
PID 2540 wrote to memory of 1988	2540	WINWORD.EXE	38
PID 2540 wrote to memory of 1988	2540	WINWORD.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\RHGP0987090G.rtf"
1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2540
- C:\Windows\splwow64.exe
  C:\Windows\splwow64.exe 12288
  2⤵
  PID:1988

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
- Downloads MZ/PE file
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Launches Equation Editor
- Suspicious use of WriteProcessMemory
PID:792
- C:\Users\Admin\AppData\Local\Temp\name.exe
  "C:\Users\Admin\AppData\Local\Temp\name.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2912
- - C:\Users\Admin\AppData\Local\carryover\resharing.exe
    "C:\Users\Admin\AppData\Local\Temp\name.exe"
    3⤵
    - Drops startup file
    - 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:2620
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
      "C:\Users\Admin\AppData\Local\Temp\name.exe"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1092

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

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\name.exe

Filesize
534KB

MD5
375d1d9a080b5533da09c98716c40f0d

SHA1
cb1e3e386b935eb999b319c1b6ae0b5b6bedf6ef

SHA256
86ccb2e2b2b1780ec85596c64030ce2525145afa00f9e3db1c3582c4f4afe7e6

SHA512
da8b7b76c532a568d4d2cad2227591b2a372687dd2b47cf369d09e7b7d67b2b6e5976894a8b59c635ebc67d18c10543de316051aad1191641a05a79b80e02b35

Download Submit
memory/792-12-0x0000000004A70000-0x0000000004BA8000-memory.dmp

Filesize
1.2MB

Download
memory/1092-61-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1092-62-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1092-63-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2540-1-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/2540-2-0x0000000070CFD000-0x0000000070D08000-memory.dmp

Filesize
44KB

Download
memory/2540-0-0x000000002FCC1000-0x000000002FCC2000-memory.dmp

Filesize
4KB

Download
memory/2540-44-0x0000000070CFD000-0x0000000070D08000-memory.dmp

Filesize
44KB

Download
memory/2620-45-0x0000000001360000-0x0000000001498000-memory.dmp

Filesize
1.2MB

Download
memory/2620-65-0x0000000001360000-0x0000000001498000-memory.dmp

Filesize
1.2MB

Download
memory/2912-43-0x0000000000290000-0x00000000003C8000-memory.dmp

Filesize
1.2MB

Download
memory/2912-40-0x0000000002A90000-0x0000000002BC8000-memory.dmp

Filesize
1.2MB

Download
memory/2912-22-0x0000000000290000-0x00000000003C8000-memory.dmp

Filesize
1.2MB

Download

Analysis

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