agenttesla | e1241bc4febe8d5eeb08b49056d73fed437a4e58b84c2e71933fa30625349012

Analysis

max time kernel
149s
max time network
157s
platform
windows7_x64
resource
win7
submitted
09/07/2020, 13:32

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target

FedexAWBClearanceInformation_PDF.exe
Size

792KB
MD5

b0829b322fa68301b4d1ddcfa11a60a3
SHA1

5fb2b75037ca30d1c22229d0b3a15544ac124e8d
SHA256

e1241bc4febe8d5eeb08b49056d73fed437a4e58b84c2e71933fa30625349012
SHA512

c438d77cf26a6ccb87f28804707ebe728b4f95e50e0bae7c5e79c020d1cb349acec028f3b80bef6f0d476cff2178410d149a9a8909cf968db9f3b7aeb2ccc0c1

Score

10^/10

agenttesla asyncrat keylogger persistence rat spyware stealer trojan

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

null:null

Mutex

AsyncMutex_6SI8OkPnk

Attributes

aes_key
1z3fzEgoXZCUsXRTb5n4m2TboyKJnfKi
anti_detection
false
autorun
false
bdos
false
delay
GRACE OVERFLOW
host
null
hwid
3
install_file
install_folder
%AppData%
mutex
AsyncMutex_6SI8OkPnk
pastebin_config
https://pastebin.com/raw/Q3bqVVf9
port
null
version
0.5.7B

aes.plain

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
mail.privateemail.com
Port:
587
Username:
[email protected]
Password:
111aaa

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla
AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat

AgentTesla Payload 6 IoCs

resource	yara_rule
behavioral1/memory/1064-14-0x0000000000400000-0x000000000045B000-memory.dmp	family_agenttesla
behavioral1/memory/1064-15-0x000000000040104C-mapping.dmp	family_agenttesla
behavioral1/memory/1064-17-0x0000000000400000-0x000000000045B000-memory.dmp	family_agenttesla
behavioral1/files/0x00030000000131ad-23.dat	family_agenttesla
behavioral1/files/0x00030000000131ad-26.dat	family_agenttesla
behavioral1/files/0x00030000000131ad-27.dat	family_agenttesla

Async RAT payload 9 IoCs

rat

resource	yara_rule
behavioral1/files/0x00040000000131a9-5.dat	asyncrat
behavioral1/files/0x00040000000131a9-7.dat	asyncrat
behavioral1/files/0x00040000000131a9-8.dat	asyncrat
behavioral1/memory/1064-14-0x0000000000400000-0x000000000045B000-memory.dmp	asyncrat
behavioral1/memory/1064-15-0x000000000040104C-mapping.dmp	asyncrat
behavioral1/memory/1064-17-0x0000000000400000-0x000000000045B000-memory.dmp	asyncrat
behavioral1/files/0x00050000000131ac-20.dat	asyncrat
behavioral1/files/0x00050000000131ac-22.dat	asyncrat
behavioral1/files/0x00050000000131ac-25.dat	asyncrat

Executes dropped EXE 4 IoCs

pid	Process
540	hzbuild.exe
1064	AddInProcess32.exe
1412	AsyncPbin.exe
1816	net4bin.exe

Loads dropped DLL 4 IoCs

pid	Process
1032	FedexAWBClearanceInformation_PDF.exe
540	hzbuild.exe
1064	AddInProcess32.exe
1064	AddInProcess32.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 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Windows\CurrentVersion\Run\cxbuild = "C:\\Windows\\system32\\pcalua.exe -a C:\\Users\\Admin\\AppData\\Roaming\\hzbuild.exe"	reg.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 540 set thread context of 1064	540	hzbuild.exe	28

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
1032	FedexAWBClearanceInformation_PDF.exe
1032	FedexAWBClearanceInformation_PDF.exe
1032	FedexAWBClearanceInformation_PDF.exe
540	hzbuild.exe
540	hzbuild.exe
540	hzbuild.exe
1816	net4bin.exe
1816	net4bin.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1032	FedexAWBClearanceInformation_PDF.exe
Token: SeDebugPrivilege	540	hzbuild.exe
Token: SeDebugPrivilege	1816	net4bin.exe
Token: SeDebugPrivilege	1412	AsyncPbin.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1064	AddInProcess32.exe

Suspicious use of WriteProcessMemory 32 IoCs

description	pid	Process	procid_target
PID 1032 wrote to memory of 900	1032	FedexAWBClearanceInformation_PDF.exe	24
PID 1032 wrote to memory of 900	1032	FedexAWBClearanceInformation_PDF.exe	24
PID 1032 wrote to memory of 900	1032	FedexAWBClearanceInformation_PDF.exe	24
PID 1032 wrote to memory of 900	1032	FedexAWBClearanceInformation_PDF.exe	24
PID 900 wrote to memory of 1436	900	cmd.exe	26
PID 900 wrote to memory of 1436	900	cmd.exe	26
PID 900 wrote to memory of 1436	900	cmd.exe	26
PID 900 wrote to memory of 1436	900	cmd.exe	26
PID 1032 wrote to memory of 540	1032	FedexAWBClearanceInformation_PDF.exe	27
PID 1032 wrote to memory of 540	1032	FedexAWBClearanceInformation_PDF.exe	27
PID 1032 wrote to memory of 540	1032	FedexAWBClearanceInformation_PDF.exe	27
PID 1032 wrote to memory of 540	1032	FedexAWBClearanceInformation_PDF.exe	27
PID 540 wrote to memory of 1064	540	hzbuild.exe	28
PID 540 wrote to memory of 1064	540	hzbuild.exe	28
PID 540 wrote to memory of 1064	540	hzbuild.exe	28
PID 540 wrote to memory of 1064	540	hzbuild.exe	28
PID 540 wrote to memory of 1064	540	hzbuild.exe	28
PID 540 wrote to memory of 1064	540	hzbuild.exe	28
PID 540 wrote to memory of 1064	540	hzbuild.exe	28
PID 540 wrote to memory of 1064	540	hzbuild.exe	28
PID 1064 wrote to memory of 1412	1064	AddInProcess32.exe	29
PID 1064 wrote to memory of 1412	1064	AddInProcess32.exe	29
PID 1064 wrote to memory of 1412	1064	AddInProcess32.exe	29
PID 1064 wrote to memory of 1412	1064	AddInProcess32.exe	29
PID 1064 wrote to memory of 1816	1064	AddInProcess32.exe	30
PID 1064 wrote to memory of 1816	1064	AddInProcess32.exe	30
PID 1064 wrote to memory of 1816	1064	AddInProcess32.exe	30
PID 1064 wrote to memory of 1816	1064	AddInProcess32.exe	30
PID 1816 wrote to memory of 1436	1816	net4bin.exe	34
PID 1816 wrote to memory of 1436	1816	net4bin.exe	34
PID 1816 wrote to memory of 1436	1816	net4bin.exe	34
PID 1816 wrote to memory of 1436	1816	net4bin.exe	34

C:\Users\Admin\AppData\Local\Temp\FedexAWBClearanceInformation_PDF.exe
"C:\Users\Admin\AppData\Local\Temp\FedexAWBClearanceInformation_PDF.exe"
1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1032
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v cxbuild /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\hzbuild.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:900
- - C:\Windows\SysWOW64\reg.exe
    REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v cxbuild /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\hzbuild.exe"
    3⤵
    - Adds Run key to start application
    PID:1436
- C:\Users\Admin\AppData\Roaming\hzbuild.exe
  "C:\Users\Admin\AppData\Roaming\hzbuild.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:540
- - C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe
    "C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1064
  - - C:\Users\Admin\AppData\Local\Temp\AsyncPbin.exe
      "C:\Users\Admin\AppData\Local\Temp\AsyncPbin.exe" 0
      4⤵
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      PID:1412
  - - C:\Users\Admin\AppData\Local\Temp\net4bin.exe
      "C:\Users\Admin\AppData\Local\Temp\net4bin.exe" 0
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:1816
    - - C:\Windows\SysWOW64\netsh.exe
        
        "netsh" wlan show profile
        5⤵
        
        PID:1436

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Web Service

T1102

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/1064-17-0x0000000000400000-0x000000000045B000-memory.dmp

Filesize
364KB

Download
memory/1064-14-0x0000000000400000-0x000000000045B000-memory.dmp

Filesize
364KB

Download