asyncrat | 24e23f8bcdde00e6158591a10b0e195d525315fd4cabc0de541ac27f9c17f8bc

General

Target

Shellbag analyzer.exe
Size

247KB
MD5

e5dc76743d789ff02bc6f747804fd327
SHA1

b96c2778e123656266782da48f8b9a84918c8fc2
SHA256

24e23f8bcdde00e6158591a10b0e195d525315fd4cabc0de541ac27f9c17f8bc
SHA512

dc6fa31d3b12bf2786b76bbf74c7d2ef13e5f2a0b09082e693b004fad2efa67eef90cac7586ec43c64705dedcb57cebfd11c865b16706aac2452318842db700d
SSDEEP

6144:iPEGPMVOrVbjlnwF9kfK8rpClz0KBb6o589GHWHWujiSPbp:iPEU9lhgBuj/PV

Score

10^/10

asyncrat default discovery evasion rat trojan

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

Attributes

delay
1
install
true
install_file
update.exe
install_folder
%AppData%
pastebin_config
https://pastebin.com/raw/hntWwyYn

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

UAC bypass 3 TTPs 3 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\consentpromptbehavioradmin = "0"	update.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\enablelua = "0"	update.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\promptonsecuredesktop = "0"	update.exe

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x000600000001e551-12.dat	family_asyncrat

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\International\Geo\Nation	Shellbag analyzer.exe
Key value queried	\REGISTRY\USER\S-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\International\Geo\Nation	update.exe

Executes dropped EXE 1 IoCs

pid	Process
1880	update.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\enablelua	update.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\enablelua = "0"	update.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs

Web Service

T1102

flow	ioc
22	6.tcp.eu.ngrok.io
20	pastebin.com
21	pastebin.com

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

System Information Discovery
T1082

Delays execution with timeout.exe 2 IoCs

evasion

pid	Process
3700	timeout.exe
3880	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
3872	schtasks.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
2952	Shellbag analyzer.exe
2952	Shellbag analyzer.exe
2952	Shellbag analyzer.exe
2952	Shellbag analyzer.exe
2952	Shellbag analyzer.exe
2952	Shellbag analyzer.exe
2952	Shellbag analyzer.exe
2952	Shellbag analyzer.exe
2952	Shellbag analyzer.exe
2952	Shellbag analyzer.exe
2952	Shellbag analyzer.exe
2952	Shellbag analyzer.exe
2952	Shellbag analyzer.exe
2952	Shellbag analyzer.exe
2952	Shellbag analyzer.exe
2952	Shellbag analyzer.exe
2952	Shellbag analyzer.exe
2952	Shellbag analyzer.exe
2952	Shellbag analyzer.exe
2952	Shellbag analyzer.exe
2952	Shellbag analyzer.exe
2952	Shellbag analyzer.exe
2952	Shellbag analyzer.exe
1880	update.exe
1880	update.exe
1880	update.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2952	Shellbag analyzer.exe
Token: SeDebugPrivilege	2952	Shellbag analyzer.exe
Token: SeDebugPrivilege	1880	update.exe
Token: SeDebugPrivilege	1880	update.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
1880	update.exe
1880	update.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1880	update.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2952 wrote to memory of 1588	2952	Shellbag analyzer.exe	87
PID 2952 wrote to memory of 1588	2952	Shellbag analyzer.exe	87
PID 2952 wrote to memory of 1156	2952	Shellbag analyzer.exe	89
PID 2952 wrote to memory of 1156	2952	Shellbag analyzer.exe	89
PID 1588 wrote to memory of 3872	1588	cmd.exe	91
PID 1588 wrote to memory of 3872	1588	cmd.exe	91
PID 1156 wrote to memory of 3700	1156	cmd.exe	92
PID 1156 wrote to memory of 3700	1156	cmd.exe	92
PID 1156 wrote to memory of 1880	1156	cmd.exe	97
PID 1156 wrote to memory of 1880	1156	cmd.exe	97
PID 1880 wrote to memory of 3852	1880	update.exe	114
PID 1880 wrote to memory of 3852	1880	update.exe	114
PID 1880 wrote to memory of 3476	1880	update.exe	116
PID 1880 wrote to memory of 3476	1880	update.exe	116
PID 3852 wrote to memory of 1904	3852	cmd.exe	118
PID 3852 wrote to memory of 1904	3852	cmd.exe	118
PID 3476 wrote to memory of 3880	3476	cmd.exe	119
PID 3476 wrote to memory of 3880	3476	cmd.exe	119

System policy modification 1 TTPs 3 IoCs

evasion

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\consentpromptbehavioradmin = "0"	update.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\enablelua = "0"	update.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\promptonsecuredesktop = "0"	update.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\Shellbag analyzer.exe
"C:\Users\Admin\AppData\Local\Temp\Shellbag analyzer.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2952
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "update" /tr '"C:\Users\Admin\AppData\Roaming\update.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1588
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "update" /tr '"C:\Users\Admin\AppData\Roaming\update.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3872
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA79A.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1156
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3700
- - C:\Users\Admin\AppData\Roaming\update.exe
    "C:\Users\Admin\AppData\Roaming\update.exe"
    3⤵
    - UAC bypass
    - Checks computer location settings
    - Executes dropped EXE
    - Checks whether UAC is enabled
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of FindShellTrayWindow
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    - System policy modification
    PID:1880
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /delete /f /tn "update"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3852
    - - C:\Windows\system32\schtasks.exe
        
        schtasks /delete /f /tn "update"
        5⤵
        
        PID:1904
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp80BF.tmp.bat""
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3476
    - - C:\Windows\system32\timeout.exe
        
        timeout 3
        5⤵
        Delays execution with timeout.exe
        
        PID:3880

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

1

T1548.002

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

1

T1548.002

Impair Defenses

1

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

Query Registry

3

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp80BF.tmp.bat

Filesize
155B

MD5
b95a4d402d05a49ebcc1ebfcca16ec1d

SHA1
8bfa491044e6c7a2a270f2fa476588e14ed93ad6

SHA256
31039ba4824e5de56c41434d5fd006e6adb6399c317e4cc476c405c7493d896b

SHA512
2ee9a430a3191eb808976c55a87a1f8600a07388df07a9e7a6b2e2865e0a03410afb0e5c92c1746876e1825ca7010900137ff6ac6107cee8fe347049bddb20d2

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpA79A.tmp.bat

Filesize
150B

MD5
9bbea26d8e64a283669867c7b94ce19d

SHA1
32a6a1ee267d3e71afbc4a72fd543281d15c97cc

SHA256
e9fe5c73c867f223d29704e898c490dc76ee800549316e60a8b38b73f08baa48

SHA512
2cfa8b92939c0602769741d0f14cbbb65450a11aa71c8b9587590bedf9dc75116a829def0fb64746bb0f85ffc857195f24fa55702fe4f64208918c4ce3b28c74

Download Submit
C:\Users\Admin\AppData\Roaming\MyData\DataLogs.conf

Filesize
8B

MD5
cf759e4c5f14fe3eec41b87ed756cea8

SHA1
c27c796bb3c2fac929359563676f4ba1ffada1f5

SHA256
c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

SHA512
c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

Download Submit
C:\Users\Admin\AppData\Roaming\update.exe

Filesize
247KB

MD5
e5dc76743d789ff02bc6f747804fd327

SHA1
b96c2778e123656266782da48f8b9a84918c8fc2

SHA256
24e23f8bcdde00e6158591a10b0e195d525315fd4cabc0de541ac27f9c17f8bc

SHA512
dc6fa31d3b12bf2786b76bbf74c7d2ef13e5f2a0b09082e693b004fad2efa67eef90cac7586ec43c64705dedcb57cebfd11c865b16706aac2452318842db700d

Download Submit
memory/1880-18-0x0000000001430000-0x000000000143E000-memory.dmp

Filesize
56KB

Download
memory/1880-17-0x00000000014B0000-0x0000000001526000-memory.dmp

Filesize
472KB

Download
memory/1880-19-0x0000000001460000-0x000000000147E000-memory.dmp

Filesize
120KB

Download
memory/1880-20-0x0000000001440000-0x000000000144E000-memory.dmp

Filesize
56KB

Download
memory/1880-21-0x000000001BA30000-0x000000001BA96000-memory.dmp

Filesize
408KB

Download
memory/2952-9-0x00007FF83D600000-0x00007FF83E0C1000-memory.dmp

Filesize
10.8MB

Download
memory/2952-8-0x00007FF83D600000-0x00007FF83E0C1000-memory.dmp

Filesize
10.8MB

Download
memory/2952-3-0x00007FF83D600000-0x00007FF83E0C1000-memory.dmp

Filesize
10.8MB

Download
memory/2952-0-0x00007FF83D603000-0x00007FF83D605000-memory.dmp

Filesize
8KB

Download
memory/2952-1-0x0000000000570000-0x00000000005B4000-memory.dmp

Filesize
272KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads