agenttesla | c43ca75d4422c4c10b084571a15e6532ee6b82acb59f7c19ca0ec4b6bb6830a9

General

Target

HGI887Y6T009AK.exe
Size

955KB
MD5

203c7be32fe375c5a88117eba27b2c50
SHA1

23472df937e02358ebdf1894680532a2e83d137b
SHA256

5d5dc213adb7029219ec59393b864e2767e555bec4af95b380c947374d537833
SHA512

0666b3e29d2eff24a5a4ce80631e2ce99d52badd54efe55e818ea56ccad023046ac82ca9e4acf94ab1128b21772fc8eb143cb073a424614f3959990f65c08ad8
SSDEEP

24576:TD0tM85tbNJjldeYiYsRYSvoGOWyynee37hWaHaxkw04:TD0tM85DJjl/iFpnHLht4

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

Drops startup file 1 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
4796	Zalucki.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
17	ip-api.com

AutoIT Executable 2 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/memory/1636-9-0x0000000000400000-0x000000000051C000-memory.dmp	autoit_exe
behavioral2/memory/4796-17-0x0000000000400000-0x000000000051C000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4796 set thread context of 2632	4796	Zalucki.exe	83

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1636-0-0x0000000000400000-0x000000000051C000-memory.dmp	upx
behavioral2/files/0x000700000002344b-6.dat	upx
behavioral2/memory/1636-9-0x0000000000400000-0x000000000051C000-memory.dmp	upx
behavioral2/memory/4796-17-0x0000000000400000-0x000000000051C000-memory.dmp	upx

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 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	HGI887Y6T009AK.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Zalucki.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegSvcs.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2632	RegSvcs.exe
2632	RegSvcs.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4796	Zalucki.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2632	RegSvcs.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1636 wrote to memory of 4796	1636	HGI887Y6T009AK.exe	82
PID 1636 wrote to memory of 4796	1636	HGI887Y6T009AK.exe	82
PID 1636 wrote to memory of 4796	1636	HGI887Y6T009AK.exe	82
PID 4796 wrote to memory of 2632	4796	Zalucki.exe	83
PID 4796 wrote to memory of 2632	4796	Zalucki.exe	83
PID 4796 wrote to memory of 2632	4796	Zalucki.exe	83
PID 4796 wrote to memory of 2632	4796	Zalucki.exe	83

C:\Users\Admin\AppData\Local\Temp\HGI887Y6T009AK.exe
"C:\Users\Admin\AppData\Local\Temp\HGI887Y6T009AK.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1636
- C:\Users\Admin\AppData\Local\hypopygidium\Zalucki.exe
  "C:\Users\Admin\AppData\Local\Temp\HGI887Y6T009AK.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:4796
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
    "C:\Users\Admin\AppData\Local\Temp\HGI887Y6T009AK.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2632

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

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\Esher

Filesize
239KB

MD5
fbc08ca668f3db9f2c8544e84c359765

SHA1
4eb07995e7be2b1746f3b7e8f2a3cdf55bba1756

SHA256
1971b37285181c6f40b2f1d4372a9d08b14b0b51eace28e20fcfc25e7bcc3315

SHA512
15a1b38676697bbf64ba45462b9ed4d9e6e2e18884c337be6d4adc22cca1a71c98efcc59c6ce6c90a308001dfee550c4c5d4f2d9a5686988d79087ce48b18495

Download Submit
C:\Users\Admin\AppData\Local\hypopygidium\Zalucki.exe

Filesize
955KB

MD5
203c7be32fe375c5a88117eba27b2c50

SHA1
23472df937e02358ebdf1894680532a2e83d137b

SHA256
5d5dc213adb7029219ec59393b864e2767e555bec4af95b380c947374d537833

SHA512
0666b3e29d2eff24a5a4ce80631e2ce99d52badd54efe55e818ea56ccad023046ac82ca9e4acf94ab1128b21772fc8eb143cb073a424614f3959990f65c08ad8

Download Submit
memory/1636-0-0x0000000000400000-0x000000000051C000-memory.dmp

Filesize
1.1MB

Download
memory/1636-3-0x0000000004360000-0x0000000004760000-memory.dmp

Filesize
4.0MB

Download
memory/1636-9-0x0000000000400000-0x000000000051C000-memory.dmp

Filesize
1.1MB

Download
memory/2632-18-0x000000007495E000-0x000000007495F000-memory.dmp

Filesize
4KB

Download
memory/2632-15-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2632-19-0x0000000005490000-0x0000000005A34000-memory.dmp

Filesize
5.6MB

Download
memory/2632-20-0x0000000005070000-0x00000000050D6000-memory.dmp

Filesize
408KB

Download
memory/2632-21-0x0000000074950000-0x0000000075100000-memory.dmp

Filesize
7.7MB

Download
memory/2632-22-0x0000000006330000-0x00000000063C2000-memory.dmp

Filesize
584KB

Download
memory/2632-23-0x00000000063D0000-0x0000000006420000-memory.dmp

Filesize
320KB

Download
memory/2632-24-0x0000000006520000-0x000000000652A000-memory.dmp

Filesize
40KB

Download
memory/2632-25-0x000000007495E000-0x000000007495F000-memory.dmp

Filesize
4KB

Download
memory/2632-26-0x0000000074950000-0x0000000075100000-memory.dmp

Filesize
7.7MB

Download
memory/4796-17-0x0000000000400000-0x000000000051C000-memory.dmp

Filesize
1.1MB

Download
memory/4796-13-0x0000000003F60000-0x0000000004360000-memory.dmp

Filesize
4.0MB

Download

Analysis

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