agenttesla | 1db6bb9de6a05bd4f6f7099a2494124e3ba4cd2571ca39d2cb316fa42d6eb98e

General

Target

HALKBANK.exe
Size

2.6MB
MD5

0dc79297559b6ff6a2db2870c4de1313
SHA1

ed43611311d5a94ce56a5fff8e45a8ac437fbf12
SHA256

16fcaf343d6c5ec3c546339a522c47b7e44f0684ff50a7acf49d8439e2956a93
SHA512

c3afb996357edb3c6d006476768a3354d629eb29ff345d64098369cad19753a50a7eefe28fc53e8f4841cc7a006b2fa43cb906a65852cab91525c2be1a161a1b

Score

10^/10

agenttesla masslogger keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
mail.bunsadokum.com
Port:
587
Username:
[email protected]
Password:
posta38Bunsa

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla
MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
stealer spyware masslogger

MassLogger Main Payload 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2712-130-0x0000000000C30000-0x0000000000ED6000-memory.dmp	family_masslogger
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\firefoxx.exe	family_masslogger
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\firefoxx.exe	family_masslogger
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\firefoxx.exe	family_masslogger

AgentTesla Payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/608-189-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla

Executes dropped EXE 5 IoCs

Processes:

RegAsm.exefirefoxx.exefirefoxx.exeRegAsm.exeRegAsm.exe

pid process

748 RegAsm.exe
456 firefoxx.exe
2360 firefoxx.exe
3264 RegAsm.exe
608 RegAsm.exe

pid	process
748	RegAsm.exe
456	firefoxx.exe
2360	firefoxx.exe
3264	RegAsm.exe
608	RegAsm.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

HALKBANK.exeRegAsm.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	HALKBANK.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	RegAsm.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

reg.exereg.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\firefoxx = "C:\\Windows\\system32\\pcalua.exe -a C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Start Menu\\Programs\\firefoxx.exe"	reg.exe
Key created	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\firefoxx = "C:\\Windows\\system32\\pcalua.exe -a C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Start Menu\\Programs\\firefoxx.exe"	reg.exe
Key created	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Windows\CurrentVersion\Run	reg.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

HALKBANK.exefirefoxx.exeRegAsm.exe

description	pid	process	target process
PID 2712 set thread context of 748	2712	HALKBANK.exe	RegAsm.exe
PID 456 set thread context of 3264	456	firefoxx.exe	RegAsm.exe
PID 3264 set thread context of 608	3264	RegAsm.exe	RegAsm.exe

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

System Information Discovery
T1082
Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid pid_target process target process

3216 456 WerFault.exe firefoxx.exe
2868 456 WerFault.exe firefoxx.exe

pid	pid_target	process	target process
3216	456	WerFault.exe	firefoxx.exe
2868	456	WerFault.exe	firefoxx.exe

Suspicious behavior: EnumeratesProcesses 61 IoCs

Processes:

HALKBANK.exeRegAsm.exefirefoxx.exefirefoxx.exeRegAsm.exeRegAsm.exe

pid	process
2712	HALKBANK.exe
2712	HALKBANK.exe
2712	HALKBANK.exe
748	RegAsm.exe
2712	HALKBANK.exe
748	RegAsm.exe
2712	HALKBANK.exe
748	RegAsm.exe
748	RegAsm.exe
2712	HALKBANK.exe
2712	HALKBANK.exe
2712	HALKBANK.exe
2712	HALKBANK.exe
2712	HALKBANK.exe
2712	HALKBANK.exe
2712	HALKBANK.exe
2712	HALKBANK.exe
2712	HALKBANK.exe
2712	HALKBANK.exe
2712	HALKBANK.exe
2712	HALKBANK.exe
2712	HALKBANK.exe
748	RegAsm.exe
2712	HALKBANK.exe
748	RegAsm.exe
2712	HALKBANK.exe
2712	HALKBANK.exe
2712	HALKBANK.exe
2712	HALKBANK.exe
2712	HALKBANK.exe
748	RegAsm.exe
748	RegAsm.exe
748	RegAsm.exe
748	RegAsm.exe
2712	HALKBANK.exe
2712	HALKBANK.exe
748	RegAsm.exe
748	RegAsm.exe
748	RegAsm.exe
748	RegAsm.exe
748	RegAsm.exe
748	RegAsm.exe
748	RegAsm.exe
748	RegAsm.exe
748	RegAsm.exe
748	RegAsm.exe
748	RegAsm.exe
748	RegAsm.exe
748	RegAsm.exe
748	RegAsm.exe
2360	firefoxx.exe
456	firefoxx.exe
456	firefoxx.exe
456	firefoxx.exe
3264	RegAsm.exe
456	firefoxx.exe
456	firefoxx.exe
3264	RegAsm.exe
3264	RegAsm.exe
608	RegAsm.exe
608	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

HALKBANK.exeRegAsm.exefirefoxx.exefirefoxx.exeRegAsm.exeRegAsm.exe

description	pid	process
Token: SeDebugPrivilege	2712	HALKBANK.exe
Token: SeDebugPrivilege	748	RegAsm.exe
Token: SeDebugPrivilege	2360	firefoxx.exe
Token: SeDebugPrivilege	456	firefoxx.exe
Token: SeDebugPrivilege	3264	RegAsm.exe
Token: SeDebugPrivilege	608	RegAsm.exe

Suspicious use of WriteProcessMemory 45 IoCs

Processes:

HALKBANK.exeRegAsm.execmd.execmd.exefirefoxx.exeRegAsm.exe

description	pid	process	target process
PID 2712 wrote to memory of 748	2712	HALKBANK.exe	RegAsm.exe
PID 2712 wrote to memory of 748	2712	HALKBANK.exe	RegAsm.exe
PID 2712 wrote to memory of 748	2712	HALKBANK.exe	RegAsm.exe
PID 2712 wrote to memory of 748	2712	HALKBANK.exe	RegAsm.exe
PID 2712 wrote to memory of 748	2712	HALKBANK.exe	RegAsm.exe
PID 2712 wrote to memory of 748	2712	HALKBANK.exe	RegAsm.exe
PID 2712 wrote to memory of 748	2712	HALKBANK.exe	RegAsm.exe
PID 2712 wrote to memory of 748	2712	HALKBANK.exe	RegAsm.exe
PID 2712 wrote to memory of 2332	2712	HALKBANK.exe	cmd.exe
PID 2712 wrote to memory of 2332	2712	HALKBANK.exe	cmd.exe
PID 2712 wrote to memory of 2332	2712	HALKBANK.exe	cmd.exe
PID 748 wrote to memory of 4472	748	RegAsm.exe	cmd.exe
PID 748 wrote to memory of 4472	748	RegAsm.exe	cmd.exe
PID 748 wrote to memory of 4472	748	RegAsm.exe	cmd.exe
PID 2332 wrote to memory of 728	2332	cmd.exe	reg.exe
PID 2332 wrote to memory of 728	2332	cmd.exe	reg.exe
PID 2332 wrote to memory of 728	2332	cmd.exe	reg.exe
PID 4472 wrote to memory of 1552	4472	cmd.exe	reg.exe
PID 4472 wrote to memory of 1552	4472	cmd.exe	reg.exe
PID 4472 wrote to memory of 1552	4472	cmd.exe	reg.exe
PID 748 wrote to memory of 456	748	RegAsm.exe	firefoxx.exe
PID 748 wrote to memory of 456	748	RegAsm.exe	firefoxx.exe
PID 748 wrote to memory of 456	748	RegAsm.exe	firefoxx.exe
PID 2712 wrote to memory of 2360	2712	HALKBANK.exe	firefoxx.exe
PID 2712 wrote to memory of 2360	2712	HALKBANK.exe	firefoxx.exe
PID 2712 wrote to memory of 2360	2712	HALKBANK.exe	firefoxx.exe
PID 456 wrote to memory of 3264	456	firefoxx.exe	RegAsm.exe
PID 456 wrote to memory of 3264	456	firefoxx.exe	RegAsm.exe
PID 456 wrote to memory of 3264	456	firefoxx.exe	RegAsm.exe
PID 456 wrote to memory of 3264	456	firefoxx.exe	RegAsm.exe
PID 456 wrote to memory of 3264	456	firefoxx.exe	RegAsm.exe
PID 456 wrote to memory of 3264	456	firefoxx.exe	RegAsm.exe
PID 456 wrote to memory of 3264	456	firefoxx.exe	RegAsm.exe
PID 456 wrote to memory of 3264	456	firefoxx.exe	RegAsm.exe
PID 3264 wrote to memory of 608	3264	RegAsm.exe	RegAsm.exe
PID 3264 wrote to memory of 608	3264	RegAsm.exe	RegAsm.exe
PID 3264 wrote to memory of 608	3264	RegAsm.exe	RegAsm.exe
PID 3264 wrote to memory of 608	3264	RegAsm.exe	RegAsm.exe
PID 3264 wrote to memory of 608	3264	RegAsm.exe	RegAsm.exe
PID 3264 wrote to memory of 608	3264	RegAsm.exe	RegAsm.exe
PID 3264 wrote to memory of 608	3264	RegAsm.exe	RegAsm.exe
PID 3264 wrote to memory of 608	3264	RegAsm.exe	RegAsm.exe
PID 456 wrote to memory of 3216	456	firefoxx.exe	WerFault.exe
PID 456 wrote to memory of 3216	456	firefoxx.exe	WerFault.exe
PID 456 wrote to memory of 3216	456	firefoxx.exe	WerFault.exe

C:\Users\Admin\AppData\Local\Temp\HALKBANK.exe
"C:\Users\Admin\AppData\Local\Temp\HALKBANK.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2712
- C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
  "C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"
  2⤵
  - Executes dropped EXE
  - Checks computer location settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:748
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v firefoxx /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\firefoxx.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4472
  - - C:\Windows\SysWOW64\reg.exe
      REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v firefoxx /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\firefoxx.exe"
      4⤵
      Adds Run key to start application
      PID:1552
- - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\firefoxx.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\firefoxx.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:456
  - - C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
      "C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:3264
    - - C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
        
        "C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"
        5⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:608
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 456 -s 1264
      4⤵
      Program crash
      PID:3216
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 456 -s 1264
      4⤵
      Program crash
      PID:2868
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v firefoxx /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\firefoxx.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2332
- - C:\Windows\SysWOW64\reg.exe
    REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v firefoxx /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\firefoxx.exe"
    3⤵
    - Adds Run key to start application
    PID:728
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\firefoxx.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\firefoxx.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2360

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 456 -ip 456
1⤵
PID:2584

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\RegAsm.exe.log

Filesize
1KB

MD5
47f56f7a4208d40f024952a3a0e321d9

SHA1
2378ca699a7a6d441d82df52e9c26936e60a4498

SHA256
facbf316a2254647ff371e485d7ed4b97ade4450685d7a992fa573c0d3e159e7

SHA512
c8b9e53739e17bd7c72df0dbb0e24fb6f0581c658b79a395a09aea463f141489848fd62a265a09dfb3da4feb7abc3d5f323743921faa3c951d00b1a18a65c39c

Download Submit
C:\Users\Admin\AppData\Local\Temp\RegAsm.exe

Filesize
63KB

MD5
0d5df43af2916f47d00c1573797c1a13

SHA1
230ab5559e806574d26b4c20847c368ed55483b0

SHA256
c066aee7aa3aa83f763ebc5541daa266ed6c648fbffcde0d836a13b221bb2adc

SHA512
f96cf9e1890746b12daf839a6d0f16f062b72c1b8a40439f96583f242980f10f867720232a6fa0f7d4d7ac0a7a6143981a5a130d6417ea98b181447134c7cfe2

Download Submit
C:\Users\Admin\AppData\Local\Temp\RegAsm.exe

Filesize
63KB

MD5
0d5df43af2916f47d00c1573797c1a13

SHA1
230ab5559e806574d26b4c20847c368ed55483b0

SHA256
c066aee7aa3aa83f763ebc5541daa266ed6c648fbffcde0d836a13b221bb2adc

SHA512
f96cf9e1890746b12daf839a6d0f16f062b72c1b8a40439f96583f242980f10f867720232a6fa0f7d4d7ac0a7a6143981a5a130d6417ea98b181447134c7cfe2

Download Submit
C:\Users\Admin\AppData\Local\Temp\RegAsm.exe

Filesize
63KB

MD5
0d5df43af2916f47d00c1573797c1a13

SHA1
230ab5559e806574d26b4c20847c368ed55483b0

SHA256
c066aee7aa3aa83f763ebc5541daa266ed6c648fbffcde0d836a13b221bb2adc

SHA512
f96cf9e1890746b12daf839a6d0f16f062b72c1b8a40439f96583f242980f10f867720232a6fa0f7d4d7ac0a7a6143981a5a130d6417ea98b181447134c7cfe2

Download Submit
C:\Users\Admin\AppData\Local\Temp\RegAsm.exe

Filesize
63KB

MD5
0d5df43af2916f47d00c1573797c1a13

SHA1
230ab5559e806574d26b4c20847c368ed55483b0

SHA256
c066aee7aa3aa83f763ebc5541daa266ed6c648fbffcde0d836a13b221bb2adc

SHA512
f96cf9e1890746b12daf839a6d0f16f062b72c1b8a40439f96583f242980f10f867720232a6fa0f7d4d7ac0a7a6143981a5a130d6417ea98b181447134c7cfe2

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\firefoxx.exe

Filesize
2.6MB

MD5
0dc79297559b6ff6a2db2870c4de1313

SHA1
ed43611311d5a94ce56a5fff8e45a8ac437fbf12

SHA256
16fcaf343d6c5ec3c546339a522c47b7e44f0684ff50a7acf49d8439e2956a93

SHA512
c3afb996357edb3c6d006476768a3354d629eb29ff345d64098369cad19753a50a7eefe28fc53e8f4841cc7a006b2fa43cb906a65852cab91525c2be1a161a1b

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\firefoxx.exe

Filesize
2.6MB

MD5
0dc79297559b6ff6a2db2870c4de1313

SHA1
ed43611311d5a94ce56a5fff8e45a8ac437fbf12

SHA256
16fcaf343d6c5ec3c546339a522c47b7e44f0684ff50a7acf49d8439e2956a93

SHA512
c3afb996357edb3c6d006476768a3354d629eb29ff345d64098369cad19753a50a7eefe28fc53e8f4841cc7a006b2fa43cb906a65852cab91525c2be1a161a1b

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\firefoxx.exe

Filesize
2.6MB

MD5
0dc79297559b6ff6a2db2870c4de1313

SHA1
ed43611311d5a94ce56a5fff8e45a8ac437fbf12

SHA256
16fcaf343d6c5ec3c546339a522c47b7e44f0684ff50a7acf49d8439e2956a93

SHA512
c3afb996357edb3c6d006476768a3354d629eb29ff345d64098369cad19753a50a7eefe28fc53e8f4841cc7a006b2fa43cb906a65852cab91525c2be1a161a1b

Download Submit
memory/456-161-0x0000000000000000-mapping.dmp

Download
memory/608-189-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/608-191-0x0000000005360000-0x00000000053FC000-memory.dmp

Filesize
624KB

Download
memory/608-188-0x0000000000000000-mapping.dmp

Download
memory/608-193-0x0000000005FE0000-0x0000000006046000-memory.dmp

Filesize
408KB

Download
memory/728-158-0x0000000000000000-mapping.dmp

Download
memory/748-149-0x0000000000400000-0x00000000004B6000-memory.dmp

Filesize
728KB

Download
memory/748-146-0x0000000000400000-0x00000000004B6000-memory.dmp

Filesize
728KB

Download
memory/748-133-0x0000000000000000-mapping.dmp

Download
memory/748-148-0x0000000000400000-0x00000000004B6000-memory.dmp

Filesize
728KB

Download
memory/748-155-0x0000000000400000-0x00000000004B6000-memory.dmp

Filesize
728KB

Download
memory/748-153-0x0000000000400000-0x00000000004B6000-memory.dmp

Filesize
728KB

Download
memory/748-152-0x0000000000400000-0x00000000004B6000-memory.dmp

Filesize
728KB

Download
memory/748-134-0x0000000000400000-0x00000000004B6000-memory.dmp

Filesize
728KB

Download
memory/748-144-0x0000000000400000-0x00000000004B6000-memory.dmp

Filesize
728KB

Download
memory/1552-159-0x0000000000000000-mapping.dmp

Download
memory/2332-156-0x0000000000000000-mapping.dmp

Download
memory/2360-162-0x0000000000000000-mapping.dmp

Download
memory/2712-130-0x0000000000C30000-0x0000000000ED6000-memory.dmp

Filesize
2.6MB

Download
memory/2712-131-0x0000000005D00000-0x00000000062A4000-memory.dmp

Filesize
5.6MB

Download
memory/2712-132-0x00000000059A0000-0x0000000005A32000-memory.dmp

Filesize
584KB

Download
memory/3216-192-0x0000000000000000-mapping.dmp

Download
memory/3264-165-0x0000000000000000-mapping.dmp

Download
memory/4472-157-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads