agenttesla | bbfd3959ef22e9fa18ed11cbc9b8f31ac36e86f0d055d2c57b81ee19f9c54175

Analysis

max time kernel
66s
max time network
128s
platform
windows10_x64
resource
win10v20201028
submitted
09/11/2020, 19:37

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General

Target
duk (3).exe
Size 511KB
Sample201109-bdp228aft2
SHA256 bbfd3959ef22e9fa18ed11cbc9b8f31ac36e86f0d055d2c57b81ee19f9c54175
MD5 04b191c4242a98c5b14ed1de9c61ef8c
SHA1 4c4fafb67933eb18100acdc76128f42dc9a9525f
SHA512 c613ece1002132dfacf60eb41a0d1910e3e3c314db9b53f13b9e9eb34c4db9553538f3fc12f22c3ddf5ca705a53f64517783b292c240c20ec0d002a8e202144b
MD5 SHA1 SHA512

Score

10^/10

agenttesla nanocore coreentity evasion keylogger rezer0 spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol
smtp
Host
mail.hotel71.com.bd
Port
587
Username
[email protected]
Password
9+^va&phP1v9

Signatures

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

CoreEntity .NET Packer 1 IoCs

A .NET packer called CoreEntity where it has embedded the payload as a BitMap object which is later decrypted.

coreentity

resource	yara_rule
behavioral2/memory/1100-6-0x0000000002350000-0x0000000002353000-memory.dmp	coreentity

NanoCore
NanoCore is a remote access tool (RAT) with a variety of capabilities.
keylogger trojan stealer spyware nanocore

AgentTesla Payload 16 IoCs

resource	yara_rule
behavioral2/memory/2448-9-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla
behavioral2/memory/2448-10-0x000000000044AC5E-mapping.dmp	family_agenttesla
behavioral2/memory/2448-22-0x000000000044AC5E-mapping.dmp	family_agenttesla
behavioral2/memory/2448-21-0x000000000044AC5E-mapping.dmp	family_agenttesla
behavioral2/memory/2448-23-0x000000000044AC5E-mapping.dmp	family_agenttesla
behavioral2/memory/2448-25-0x000000000044AC5E-mapping.dmp	family_agenttesla
behavioral2/memory/2448-24-0x000000000044AC5E-mapping.dmp	family_agenttesla
behavioral2/memory/2448-26-0x000000000044AC5E-mapping.dmp	family_agenttesla
behavioral2/memory/2448-33-0x000000000044AC5E-mapping.dmp	family_agenttesla
behavioral2/memory/2448-32-0x000000000044AC5E-mapping.dmp	family_agenttesla
behavioral2/memory/2448-31-0x000000000044AC5E-mapping.dmp	family_agenttesla
behavioral2/memory/2448-30-0x000000000044AC5E-mapping.dmp	family_agenttesla
behavioral2/memory/2448-34-0x000000000044AC5E-mapping.dmp	family_agenttesla
behavioral2/memory/2448-29-0x000000000044AC5E-mapping.dmp	family_agenttesla
behavioral2/memory/2448-28-0x000000000044AC5E-mapping.dmp	family_agenttesla
behavioral2/memory/2448-27-0x000000000044AC5E-mapping.dmp	family_agenttesla

rezer0 1 IoCs

Detects ReZer0, a packer with multiple versions used in various campaigns.

rezer0

resource	yara_rule
behavioral2/memory/1100-7-0x000000000A5D0000-0x000000000A621000-memory.dmp	rezer0

Disables Task Manager via registry modification
evasion

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	RegSvcs.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1100 set thread context of 2448	1100	duk (3).exe	75

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3052	2448	WerFault.exe	75

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
1124	REG.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

pid	Process
2448	RegSvcs.exe
2448	RegSvcs.exe
3052	WerFault.exe
3052	WerFault.exe
3052	WerFault.exe
3052	WerFault.exe
3052	WerFault.exe
3052	WerFault.exe
3052	WerFault.exe
3052	WerFault.exe
3052	WerFault.exe
3052	WerFault.exe
3052	WerFault.exe
3052	WerFault.exe
3052	WerFault.exe
3052	WerFault.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	1100	duk (3).exe
Token: SeDebugPrivilege	2448	RegSvcs.exe
Token: SeRestorePrivilege	3052	WerFault.exe
Token: SeBackupPrivilege	3052	WerFault.exe
Token: SeDebugPrivilege	3052	WerFault.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1100	duk (3).exe
1100	duk (3).exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1100 wrote to memory of 2448	1100	duk (3).exe	75
PID 1100 wrote to memory of 2448	1100	duk (3).exe	75
PID 1100 wrote to memory of 2448	1100	duk (3).exe	75
PID 1100 wrote to memory of 2448	1100	duk (3).exe	75
PID 1100 wrote to memory of 2448	1100	duk (3).exe	75
PID 1100 wrote to memory of 2448	1100	duk (3).exe	75
PID 1100 wrote to memory of 2448	1100	duk (3).exe	75
PID 1100 wrote to memory of 2448	1100	duk (3).exe	75
PID 2448 wrote to memory of 1124	2448	RegSvcs.exe	79
PID 2448 wrote to memory of 1124	2448	RegSvcs.exe	79
PID 2448 wrote to memory of 1124	2448	RegSvcs.exe	79
PID 2448 wrote to memory of 3100	2448	RegSvcs.exe	81
PID 2448 wrote to memory of 3100	2448	RegSvcs.exe	81
PID 2448 wrote to memory of 3100	2448	RegSvcs.exe	81

C:\Users\Admin\AppData\Local\Temp\duk (3).exe
"C:\Users\Admin\AppData\Local\Temp\duk (3).exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1100
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "{path}"
  2⤵
  - Drops file in Drivers directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2448
- - C:\Windows\SysWOW64\REG.exe
    REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
    3⤵
    - Modifies registry key
    PID:1124
- - C:\Windows\SysWOW64\netsh.exe
    "netsh" wlan show profile
    3⤵
    PID:3100
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2448 -s 1524
    3⤵
    - Program crash
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3052

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1100-1-0x0000000000020000-0x0000000000021000-memory.dmp

Download

memory/1100-3-0x0000000007260000-0x0000000007261000-memory.dmp

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memory/1100-4-0x0000000006E00000-0x0000000006E01000-memory.dmp

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memory/1100-5-0x0000000006DB0000-0x0000000006DB1000-memory.dmp

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memory/1100-6-0x0000000002350000-0x0000000002353000-memory.dmp

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memory/1100-7-0x000000000A5D0000-0x000000000A621000-memory.dmp

Download

memory/1100-8-0x000000000A6E0000-0x000000000A6E1000-memory.dmp

Download

memory/1100-0-0x0000000073CB0000-0x000000007439E000-memory.dmp

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memory/2448-16-0x0000000004E00000-0x0000000004E01000-memory.dmp

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memory/2448-17-0x00000000059D0000-0x00000000059D1000-memory.dmp

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memory/2448-9-0x0000000000400000-0x0000000000450000-memory.dmp

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memory/2448-11-0x0000000073CB0000-0x000000007439E000-memory.dmp

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memory/3052-20-0x0000000004550000-0x0000000004551000-memory.dmp

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memory/3052-35-0x0000000004D80000-0x0000000004D81000-memory.dmp

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