asyncrat | bb858fda45f0ba2c5ef800bcc9f23424ce2d43ae4e202cbf3e293ae16089d4fc

Analysis

max time kernel
134s
max time network
160s
platform
windows10-2004_x64
resource
win10v2004-20230915-en
resource tags

arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
submitted
30/09/2023, 07:53

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General

Target

bf55dee34ac140ac4f7d717900613fed.exe
Size

62KB
MD5

bf55dee34ac140ac4f7d717900613fed
SHA1

5ece7fe6ab249b4396892cbb1800f75c62aa1d8b
SHA256

bb858fda45f0ba2c5ef800bcc9f23424ce2d43ae4e202cbf3e293ae16089d4fc
SHA512

2542e89716ee204e95270f2a7c502ccbc3d6b5a6546bb97f5a0ba4614bca2e5caca1e9458b6a01f0e34cb127b8892c4cd28779345b34005c8456f5f23116af54
SSDEEP

1536:vHDTgTiogcF0aJb9eVyN3dp7b5pAtYZR4v7Sf+:vjTgTiogcGaJb9j3dJKcpm

Score

10^/10

asyncrat grandrp bot i rat

Malware Config

Extracted

Family

asyncrat

Version

true

Botnet

GrandRP Bot I

Mutex

RRAT_oMdrDYwqB

Attributes

delay
3
install
false
install_file
powershell Add-MpPreference -ExclusionPath C:\
install_folder
Explorer.exe
pastebin_config
http://pastebin.com/raw/KKpnJShN

aes.plain

Signatures

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

Async RAT payload 4 IoCs

rat

resource	yara_rule
behavioral2/memory/1804-0-0x0000000000220000-0x0000000000236000-memory.dmp	asyncrat
behavioral2/files/0x000c00000002309e-53.dat	asyncrat
behavioral2/files/0x000c00000002309e-55.dat	asyncrat
behavioral2/memory/1304-71-0x0000000002AE0000-0x0000000002AEE000-memory.dmp	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-1-5-21-1926387074-3400613176-3566796709-1000\Control Panel\International\Geo\Nation	bf55dee34ac140ac4f7d717900613fed.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1926387074-3400613176-3566796709-1000\Control Panel\International\Geo\Nation	Explorer.exe

Executes dropped EXE 1 IoCs

pid	Process
1304	Explorer.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 3 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
4476	schtasks.exe
1248	schtasks.exe
2856	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3664	timeout.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
636	powershell.exe
636	powershell.exe
1804	bf55dee34ac140ac4f7d717900613fed.exe
1804	bf55dee34ac140ac4f7d717900613fed.exe
1804	bf55dee34ac140ac4f7d717900613fed.exe
1804	bf55dee34ac140ac4f7d717900613fed.exe
1804	bf55dee34ac140ac4f7d717900613fed.exe
1804	bf55dee34ac140ac4f7d717900613fed.exe
1804	bf55dee34ac140ac4f7d717900613fed.exe
1804	bf55dee34ac140ac4f7d717900613fed.exe
1804	bf55dee34ac140ac4f7d717900613fed.exe
1804	bf55dee34ac140ac4f7d717900613fed.exe
1804	bf55dee34ac140ac4f7d717900613fed.exe
1804	bf55dee34ac140ac4f7d717900613fed.exe
1804	bf55dee34ac140ac4f7d717900613fed.exe
1804	bf55dee34ac140ac4f7d717900613fed.exe
1804	bf55dee34ac140ac4f7d717900613fed.exe
1804	bf55dee34ac140ac4f7d717900613fed.exe
1804	bf55dee34ac140ac4f7d717900613fed.exe
1804	bf55dee34ac140ac4f7d717900613fed.exe
1804	bf55dee34ac140ac4f7d717900613fed.exe
1804	bf55dee34ac140ac4f7d717900613fed.exe
1804	bf55dee34ac140ac4f7d717900613fed.exe
1804	bf55dee34ac140ac4f7d717900613fed.exe
1804	bf55dee34ac140ac4f7d717900613fed.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	636	powershell.exe
Token: SeDebugPrivilege	1804	bf55dee34ac140ac4f7d717900613fed.exe
Token: SeDebugPrivilege	1304	Explorer.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 1804 wrote to memory of 1976	1804	bf55dee34ac140ac4f7d717900613fed.exe	86
PID 1804 wrote to memory of 1976	1804	bf55dee34ac140ac4f7d717900613fed.exe	86
PID 1804 wrote to memory of 1976	1804	bf55dee34ac140ac4f7d717900613fed.exe	86
PID 1976 wrote to memory of 636	1976	cmd.exe	88
PID 1976 wrote to memory of 636	1976	cmd.exe	88
PID 1976 wrote to memory of 636	1976	cmd.exe	88
PID 1804 wrote to memory of 3504	1804	bf55dee34ac140ac4f7d717900613fed.exe	91
PID 1804 wrote to memory of 3504	1804	bf55dee34ac140ac4f7d717900613fed.exe	91
PID 1804 wrote to memory of 3504	1804	bf55dee34ac140ac4f7d717900613fed.exe	91
PID 1804 wrote to memory of 3068	1804	bf55dee34ac140ac4f7d717900613fed.exe	92
PID 1804 wrote to memory of 3068	1804	bf55dee34ac140ac4f7d717900613fed.exe	92
PID 1804 wrote to memory of 3068	1804	bf55dee34ac140ac4f7d717900613fed.exe	92
PID 3068 wrote to memory of 3664	3068	cmd.exe	95
PID 3068 wrote to memory of 3664	3068	cmd.exe	95
PID 3068 wrote to memory of 3664	3068	cmd.exe	95
PID 3504 wrote to memory of 1248	3504	cmd.exe	96
PID 3504 wrote to memory of 1248	3504	cmd.exe	96
PID 3504 wrote to memory of 1248	3504	cmd.exe	96
PID 3068 wrote to memory of 1304	3068	cmd.exe	97
PID 3068 wrote to memory of 1304	3068	cmd.exe	97
PID 3068 wrote to memory of 1304	3068	cmd.exe	97
PID 1304 wrote to memory of 4472	1304	Explorer.exe	102
PID 1304 wrote to memory of 4472	1304	Explorer.exe	102
PID 1304 wrote to memory of 4472	1304	Explorer.exe	102
PID 1304 wrote to memory of 3992	1304	Explorer.exe	104
PID 1304 wrote to memory of 3992	1304	Explorer.exe	104
PID 1304 wrote to memory of 3992	1304	Explorer.exe	104
PID 4472 wrote to memory of 2856	4472	cmd.exe	106
PID 4472 wrote to memory of 2856	4472	cmd.exe	106
PID 4472 wrote to memory of 2856	4472	cmd.exe	106
PID 3992 wrote to memory of 4476	3992	cmd.exe	107
PID 3992 wrote to memory of 4476	3992	cmd.exe	107
PID 3992 wrote to memory of 4476	3992	cmd.exe	107

C:\Users\Admin\AppData\Local\Temp\bf55dee34ac140ac4f7d717900613fed.exe
"C:\Users\Admin\AppData\Local\Temp\bf55dee34ac140ac4f7d717900613fed.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1804
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c powershell Add-MpPreference -ExclusionPath C:\
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1976
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell Add-MpPreference -ExclusionPath C:\
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:636
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Windows\WindowsUpdater" /tr '"C:\Users\Admin\AppData\Roaming\Explorer.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3504
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Windows\WindowsUpdater" /tr '"C:\Users\Admin\AppData\Roaming\Explorer.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:1248
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpB43C.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3068
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3664
- - C:\Users\Admin\AppData\Roaming\Explorer.exe
    "C:\Users\Admin\AppData\Roaming\Explorer.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1304
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /Cschtasks /create /f /sc ONIDLE /i 1 /rl highest /tn "Windows\WinUpdate" /tr "C:\Users\Admin\AppData\Local\explore.exe"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4472
    - - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /f /sc ONIDLE /i 1 /rl highest /tn "Windows\WinUpdate" /tr "C:\Users\Admin\AppData\Local\explore.exe"
        5⤵
        Creates scheduled task(s)
        
        PID:2856
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /Cschtasks /create /f /sc ONIDLE /i 1 /rl highest /tn "Windows\WinUpdaters" /tr "cmd.exe /C powershell Add-MpPreference -ExclusionPath C:\"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3992
    - - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /f /sc ONIDLE /i 1 /rl highest /tn "Windows\WinUpdaters" /tr "cmd.exe /C powershell Add-MpPreference -ExclusionPath C:\"
        5⤵
        Creates scheduled task(s)
        
        PID:4476

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_fk4nizcx.en5.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpB43C.tmp.bat

Filesize
152B

MD5
05a7f934ba5d342a9f6f6db6bd3c574a

SHA1
b15cc515950db9da122df377b8cf035b123fddb0

SHA256
a880276dc15fbb0772f6f1934f29352ed863230a0b90a12485604e4369de8fbf

SHA512
819eec7facd1874cf502de4bd7573a0475df9d1356d554db0487571fa1d1895d0229081af0c8d40a81642f003774634e34d06c1e7d00a8d02b9884eaf6db88bb

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

Filesize
62KB

MD5
bf55dee34ac140ac4f7d717900613fed

SHA1
5ece7fe6ab249b4396892cbb1800f75c62aa1d8b

SHA256
bb858fda45f0ba2c5ef800bcc9f23424ce2d43ae4e202cbf3e293ae16089d4fc

SHA512
2542e89716ee204e95270f2a7c502ccbc3d6b5a6546bb97f5a0ba4614bca2e5caca1e9458b6a01f0e34cb127b8892c4cd28779345b34005c8456f5f23116af54

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

Filesize
62KB

MD5
bf55dee34ac140ac4f7d717900613fed

SHA1
5ece7fe6ab249b4396892cbb1800f75c62aa1d8b

SHA256
bb858fda45f0ba2c5ef800bcc9f23424ce2d43ae4e202cbf3e293ae16089d4fc

SHA512
2542e89716ee204e95270f2a7c502ccbc3d6b5a6546bb97f5a0ba4614bca2e5caca1e9458b6a01f0e34cb127b8892c4cd28779345b34005c8456f5f23116af54

Download Submit
memory/636-19-0x0000000005E90000-0x0000000005EF6000-memory.dmp

Filesize
408KB

Download
memory/636-47-0x00000000076F0000-0x00000000076FA000-memory.dmp

Filesize
40KB

Download
memory/636-7-0x00000000054B0000-0x0000000005AD8000-memory.dmp

Filesize
6.2MB

Download
memory/636-5-0x0000000004E70000-0x0000000004E80000-memory.dmp

Filesize
64KB

Download
memory/636-8-0x00000000053B0000-0x00000000053D2000-memory.dmp

Filesize
136KB

Download
memory/636-9-0x0000000005C90000-0x0000000005CF6000-memory.dmp

Filesize
408KB

Download
memory/636-4-0x0000000074E90000-0x0000000075640000-memory.dmp

Filesize
7.7MB

Download
memory/636-63-0x0000000074E90000-0x0000000075640000-memory.dmp

Filesize
7.7MB

Download
memory/636-20-0x0000000005FE0000-0x0000000006334000-memory.dmp

Filesize
3.3MB

Download
memory/636-21-0x0000000006360000-0x000000000637E000-memory.dmp

Filesize
120KB

Download
memory/636-22-0x0000000006420000-0x000000000646C000-memory.dmp

Filesize
304KB

Download
memory/636-23-0x0000000004E70000-0x0000000004E80000-memory.dmp

Filesize
64KB

Download
memory/636-24-0x000000007F370000-0x000000007F380000-memory.dmp

Filesize
64KB

Download
memory/636-25-0x0000000006940000-0x0000000006972000-memory.dmp

Filesize
200KB

Download
memory/636-26-0x0000000070440000-0x000000007048C000-memory.dmp

Filesize
304KB

Download
memory/636-60-0x0000000004E70000-0x0000000004E80000-memory.dmp

Filesize
64KB

Download
memory/636-37-0x0000000006920000-0x000000000693E000-memory.dmp

Filesize
120KB

Download
memory/636-46-0x0000000007680000-0x000000000769A000-memory.dmp

Filesize
104KB

Download
memory/636-58-0x0000000074E90000-0x0000000075640000-memory.dmp

Filesize
7.7MB

Download
memory/636-3-0x0000000004D80000-0x0000000004DB6000-memory.dmp

Filesize
216KB

Download
memory/636-6-0x0000000004E70000-0x0000000004E80000-memory.dmp

Filesize
64KB

Download
memory/636-45-0x0000000007CC0000-0x000000000833A000-memory.dmp

Filesize
6.5MB

Download
memory/636-38-0x0000000007540000-0x00000000075E3000-memory.dmp

Filesize
652KB

Download
memory/636-48-0x0000000007920000-0x00000000079B6000-memory.dmp

Filesize
600KB

Download
memory/636-49-0x00000000078A0000-0x00000000078B1000-memory.dmp

Filesize
68KB

Download
memory/636-50-0x00000000078D0000-0x00000000078DE000-memory.dmp

Filesize
56KB

Download
memory/636-51-0x00000000078E0000-0x00000000078F4000-memory.dmp

Filesize
80KB

Download
memory/636-54-0x00000000079E0000-0x00000000079FA000-memory.dmp

Filesize
104KB

Download
memory/636-56-0x00000000079C0000-0x00000000079C8000-memory.dmp

Filesize
32KB

Download
memory/1304-70-0x0000000004F70000-0x0000000004FE6000-memory.dmp

Filesize
472KB

Download
memory/1304-76-0x0000000006FB0000-0x0000000007042000-memory.dmp

Filesize
584KB

Download
memory/1304-57-0x0000000074E90000-0x0000000075640000-memory.dmp

Filesize
7.7MB

Download
memory/1304-67-0x0000000006A00000-0x0000000006FA4000-memory.dmp

Filesize
5.6MB

Download
memory/1304-59-0x0000000005050000-0x0000000005060000-memory.dmp

Filesize
64KB

Download
memory/1304-72-0x0000000004F10000-0x0000000004F2E000-memory.dmp

Filesize
120KB

Download
memory/1304-69-0x0000000005050000-0x0000000005060000-memory.dmp

Filesize
64KB

Download
memory/1304-71-0x0000000002AE0000-0x0000000002AEE000-memory.dmp

Filesize
56KB

Download
memory/1304-68-0x0000000074E90000-0x0000000075640000-memory.dmp

Filesize
7.7MB

Download
memory/1804-43-0x0000000074E90000-0x0000000075640000-memory.dmp

Filesize
7.7MB

Download
memory/1804-0-0x0000000000220000-0x0000000000236000-memory.dmp

Filesize
88KB

Download
memory/1804-36-0x0000000005920000-0x00000000059BC000-memory.dmp

Filesize
624KB

Download
memory/1804-1-0x0000000074E90000-0x0000000075640000-memory.dmp

Filesize
7.7MB

Download
memory/1804-2-0x0000000004C30000-0x0000000004C40000-memory.dmp

Filesize
64KB

Download