agenttesla | e1241bc4febe8d5eeb08b49056d73fed437a4e58b84c2e71933fa30625349012

Analysis

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

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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

Processes:

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
\Users\Admin\AppData\Local\Temp\net4bin.exe	family_agenttesla
C:\Users\Admin\AppData\Local\Temp\net4bin.exe	family_agenttesla
C:\Users\Admin\AppData\Local\Temp\net4bin.exe	family_agenttesla

Async RAT payload 9 IoCs

rat

Processes:

resource	yara_rule
\Users\Admin\AppData\Roaming\hzbuild.exe	asyncrat
C:\Users\Admin\AppData\Roaming\hzbuild.exe	asyncrat
C:\Users\Admin\AppData\Roaming\hzbuild.exe	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
\Users\Admin\AppData\Local\Temp\AsyncPbin.exe	asyncrat
C:\Users\Admin\AppData\Local\Temp\AsyncPbin.exe	asyncrat
C:\Users\Admin\AppData\Local\Temp\AsyncPbin.exe	asyncrat

Executes dropped EXE 4 IoCs

Processes:

hzbuild.exeAddInProcess32.exeAsyncPbin.exenet4bin.exe

pid process

540 hzbuild.exe
1064 AddInProcess32.exe
1412 AsyncPbin.exe
1816 net4bin.exe
Loads dropped DLL 4 IoCs

Processes:

FedexAWBClearanceInformation_PDF.exehzbuild.exeAddInProcess32.exe

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

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

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

reg.exe

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

Processes:

hzbuild.exe

description pid process target process

PID 540 set thread context of 1064 540 hzbuild.exe AddInProcess32.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	pid	process	target process
PID 540 set thread context of 1064	540	hzbuild.exe	AddInProcess32.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

FedexAWBClearanceInformation_PDF.exehzbuild.exenet4bin.exe

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

Processes:

FedexAWBClearanceInformation_PDF.exehzbuild.exenet4bin.exeAsyncPbin.exe

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

Processes:

AddInProcess32.exe

pid process

1064 AddInProcess32.exe

pid	process
1064	AddInProcess32.exe

Suspicious use of WriteProcessMemory 32 IoCs

Processes:

FedexAWBClearanceInformation_PDF.execmd.exehzbuild.exeAddInProcess32.exenet4bin.exe

description	pid	process	target process
PID 1032 wrote to memory of 900	1032	FedexAWBClearanceInformation_PDF.exe	cmd.exe
PID 1032 wrote to memory of 900	1032	FedexAWBClearanceInformation_PDF.exe	cmd.exe
PID 1032 wrote to memory of 900	1032	FedexAWBClearanceInformation_PDF.exe	cmd.exe
PID 1032 wrote to memory of 900	1032	FedexAWBClearanceInformation_PDF.exe	cmd.exe
PID 900 wrote to memory of 1436	900	cmd.exe	reg.exe
PID 900 wrote to memory of 1436	900	cmd.exe	reg.exe
PID 900 wrote to memory of 1436	900	cmd.exe	reg.exe
PID 900 wrote to memory of 1436	900	cmd.exe	reg.exe
PID 1032 wrote to memory of 540	1032	FedexAWBClearanceInformation_PDF.exe	hzbuild.exe
PID 1032 wrote to memory of 540	1032	FedexAWBClearanceInformation_PDF.exe	hzbuild.exe
PID 1032 wrote to memory of 540	1032	FedexAWBClearanceInformation_PDF.exe	hzbuild.exe
PID 1032 wrote to memory of 540	1032	FedexAWBClearanceInformation_PDF.exe	hzbuild.exe
PID 540 wrote to memory of 1064	540	hzbuild.exe	AddInProcess32.exe
PID 540 wrote to memory of 1064	540	hzbuild.exe	AddInProcess32.exe
PID 540 wrote to memory of 1064	540	hzbuild.exe	AddInProcess32.exe
PID 540 wrote to memory of 1064	540	hzbuild.exe	AddInProcess32.exe
PID 540 wrote to memory of 1064	540	hzbuild.exe	AddInProcess32.exe
PID 540 wrote to memory of 1064	540	hzbuild.exe	AddInProcess32.exe
PID 540 wrote to memory of 1064	540	hzbuild.exe	AddInProcess32.exe
PID 540 wrote to memory of 1064	540	hzbuild.exe	AddInProcess32.exe
PID 1064 wrote to memory of 1412	1064	AddInProcess32.exe	AsyncPbin.exe
PID 1064 wrote to memory of 1412	1064	AddInProcess32.exe	AsyncPbin.exe
PID 1064 wrote to memory of 1412	1064	AddInProcess32.exe	AsyncPbin.exe
PID 1064 wrote to memory of 1412	1064	AddInProcess32.exe	AsyncPbin.exe
PID 1064 wrote to memory of 1816	1064	AddInProcess32.exe	net4bin.exe
PID 1064 wrote to memory of 1816	1064	AddInProcess32.exe	net4bin.exe
PID 1064 wrote to memory of 1816	1064	AddInProcess32.exe	net4bin.exe
PID 1064 wrote to memory of 1816	1064	AddInProcess32.exe	net4bin.exe
PID 1816 wrote to memory of 1436	1816	net4bin.exe	netsh.exe
PID 1816 wrote to memory of 1436	1816	net4bin.exe	netsh.exe
PID 1816 wrote to memory of 1436	1816	net4bin.exe	netsh.exe
PID 1816 wrote to memory of 1436	1816	net4bin.exe	netsh.exe

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 Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Web Service

T1102

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe
MD5
6a673bfc3b67ae9782cb31af2f234c68

SHA1
7544e89566d91e84e3cd437b9a073e5f6b56566e

SHA256
978a4093058aa2ebf05dc353897d90d950324389879b57741b64160825b5ec0e

SHA512
72c302372ce87ceda2a3c70a6005d3f9c112f1641bc7fe6824c718971233e66c07e2996d2785fa358566c38714c25ea812c05c7cfd2f588284849d495fd24f39

Download Submit
C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe
MD5
6a673bfc3b67ae9782cb31af2f234c68

SHA1
7544e89566d91e84e3cd437b9a073e5f6b56566e

SHA256
978a4093058aa2ebf05dc353897d90d950324389879b57741b64160825b5ec0e

SHA512
72c302372ce87ceda2a3c70a6005d3f9c112f1641bc7fe6824c718971233e66c07e2996d2785fa358566c38714c25ea812c05c7cfd2f588284849d495fd24f39

Download Submit
C:\Users\Admin\AppData\Local\Temp\AsyncPbin.exe
MD5
e1b8d6bbb3bc4c31cb820b113b999547

SHA1
58758d548f964afe42418b8718331f15cf38b23c

SHA256
081ed36d1d39e9ab29d11a45874073129921d52429ab9ccb9c2fcca62b9e89fb

SHA512
4292abaa0bcd9c800891cdd1690adc0e4280319d67d76da683f9a0026d027f3921f291e752f1b8b57b6e4f94b6e56282c88240c98c09d4ad4cce93ac93663d65

Download Submit
C:\Users\Admin\AppData\Local\Temp\AsyncPbin.exe
MD5
e1b8d6bbb3bc4c31cb820b113b999547

SHA1
58758d548f964afe42418b8718331f15cf38b23c

SHA256
081ed36d1d39e9ab29d11a45874073129921d52429ab9ccb9c2fcca62b9e89fb

SHA512
4292abaa0bcd9c800891cdd1690adc0e4280319d67d76da683f9a0026d027f3921f291e752f1b8b57b6e4f94b6e56282c88240c98c09d4ad4cce93ac93663d65

Download Submit
C:\Users\Admin\AppData\Local\Temp\net4bin.exe
MD5
b7abd2c72219ab849c50cea10abb46fe

SHA1
8b3e653f1ac619e1ac7237f1b4ebe7aac884be0b

SHA256
fd74c98b36deb73e5bffc922e891425972b3cf1f7a6957ec0443d5f8e4a244c3

SHA512
088d5473dadb55f6b5076773c993758a4015c438f04f66ae9dcc16174e0ad2b833464c7f287ecc9e397cef99f6228124805db09a9194eb60460c6cd9b66d5cff

Download Submit
C:\Users\Admin\AppData\Local\Temp\net4bin.exe
MD5
b7abd2c72219ab849c50cea10abb46fe

SHA1
8b3e653f1ac619e1ac7237f1b4ebe7aac884be0b

SHA256
fd74c98b36deb73e5bffc922e891425972b3cf1f7a6957ec0443d5f8e4a244c3

SHA512
088d5473dadb55f6b5076773c993758a4015c438f04f66ae9dcc16174e0ad2b833464c7f287ecc9e397cef99f6228124805db09a9194eb60460c6cd9b66d5cff

Download Submit
C:\Users\Admin\AppData\Roaming\hzbuild.exe
MD5
b0829b322fa68301b4d1ddcfa11a60a3

SHA1
5fb2b75037ca30d1c22229d0b3a15544ac124e8d

SHA256
e1241bc4febe8d5eeb08b49056d73fed437a4e58b84c2e71933fa30625349012

SHA512
c438d77cf26a6ccb87f28804707ebe728b4f95e50e0bae7c5e79c020d1cb349acec028f3b80bef6f0d476cff2178410d149a9a8909cf968db9f3b7aeb2ccc0c1

Download Submit
C:\Users\Admin\AppData\Roaming\hzbuild.exe
MD5
b0829b322fa68301b4d1ddcfa11a60a3

SHA1
5fb2b75037ca30d1c22229d0b3a15544ac124e8d

SHA256
e1241bc4febe8d5eeb08b49056d73fed437a4e58b84c2e71933fa30625349012

SHA512
c438d77cf26a6ccb87f28804707ebe728b4f95e50e0bae7c5e79c020d1cb349acec028f3b80bef6f0d476cff2178410d149a9a8909cf968db9f3b7aeb2ccc0c1

Download Submit
\Users\Admin\AppData\Local\Temp\AddInProcess32.exe
MD5
6a673bfc3b67ae9782cb31af2f234c68

SHA1
7544e89566d91e84e3cd437b9a073e5f6b56566e

SHA256
978a4093058aa2ebf05dc353897d90d950324389879b57741b64160825b5ec0e

SHA512
72c302372ce87ceda2a3c70a6005d3f9c112f1641bc7fe6824c718971233e66c07e2996d2785fa358566c38714c25ea812c05c7cfd2f588284849d495fd24f39

Download Submit
\Users\Admin\AppData\Local\Temp\AsyncPbin.exe
MD5
e1b8d6bbb3bc4c31cb820b113b999547

SHA1
58758d548f964afe42418b8718331f15cf38b23c

SHA256
081ed36d1d39e9ab29d11a45874073129921d52429ab9ccb9c2fcca62b9e89fb

SHA512
4292abaa0bcd9c800891cdd1690adc0e4280319d67d76da683f9a0026d027f3921f291e752f1b8b57b6e4f94b6e56282c88240c98c09d4ad4cce93ac93663d65

Download Submit
\Users\Admin\AppData\Local\Temp\net4bin.exe
MD5
b7abd2c72219ab849c50cea10abb46fe

SHA1
8b3e653f1ac619e1ac7237f1b4ebe7aac884be0b

SHA256
fd74c98b36deb73e5bffc922e891425972b3cf1f7a6957ec0443d5f8e4a244c3

SHA512
088d5473dadb55f6b5076773c993758a4015c438f04f66ae9dcc16174e0ad2b833464c7f287ecc9e397cef99f6228124805db09a9194eb60460c6cd9b66d5cff

Download Submit
\Users\Admin\AppData\Roaming\hzbuild.exe
MD5
b0829b322fa68301b4d1ddcfa11a60a3

SHA1
5fb2b75037ca30d1c22229d0b3a15544ac124e8d

SHA256
e1241bc4febe8d5eeb08b49056d73fed437a4e58b84c2e71933fa30625349012

SHA512
c438d77cf26a6ccb87f28804707ebe728b4f95e50e0bae7c5e79c020d1cb349acec028f3b80bef6f0d476cff2178410d149a9a8909cf968db9f3b7aeb2ccc0c1

Download Submit
memory/540-6-0x0000000000000000-mapping.dmp

Download
memory/900-3-0x0000000000000000-mapping.dmp

Download
memory/1032-1-0x0000000000000000-0x0000000000000000-disk.dmp

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

Filesize
364KB

Download
memory/1064-15-0x000000000040104C-mapping.dmp

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

Filesize
364KB

Download
memory/1412-21-0x0000000000000000-mapping.dmp

Download
memory/1436-4-0x0000000000000000-mapping.dmp

Download
memory/1436-28-0x0000000000000000-mapping.dmp

Download
memory/1816-24-0x0000000000000000-mapping.dmp

Download