asyncrat | 70470ff2191ba5a398f4e3d83c798d00cf676f36caf77054e796448c7c6d47b9

General

Target

AsyncClient.exe
Size

47KB
MD5

bfcd5b55f364dad8c1920e9ffef8e5e0
SHA1

3c2f7d0f466209ce1e77dc83dbe3bbf7633bc9a7
SHA256

70470ff2191ba5a398f4e3d83c798d00cf676f36caf77054e796448c7c6d47b9
SHA512

9a0ae743936b07ef641a9990c2007d56ea9dab81791f78a1c3c4005e2c57d41325f95ed06043e2c8efeb92a220e97c0bf48966468f960c8ac6992b606435b8d5
SSDEEP

768:suifo9Tg4xr5WUx9tDmo2qrFlt9m3hjHPIO7QwJ0bMGNbFa5W3NUlaN3xtES1zBE:suqo9Tg+L22tYmO7Qxb5NQ5W+C34S/dW

Score

10^/10

asyncrat default ransomware rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

Jamalhacker-55716.portmap.host:55716

Mutex

Px6vesn1b0HA

Attributes

delay
3
install
true
install_file
Windows pro.exe
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x000400000002ab01-12.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
1972	Windows pro.exe

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3766757357-1293853516-507035944-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\tmp3412.tmp.png"	Windows pro.exe

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

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1044	timeout.exe

Modifies Control Panel 2 IoCs

evasion

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3766757357-1293853516-507035944-1000\Control Panel\Desktop\WallpaperStyle = "2"	Windows pro.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3766757357-1293853516-507035944-1000\Control Panel\Desktop\TileWallpaper = "0"	Windows pro.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
4572	schtasks.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
1732	AsyncClient.exe
1732	AsyncClient.exe
1732	AsyncClient.exe
1732	AsyncClient.exe
1732	AsyncClient.exe
1732	AsyncClient.exe
1732	AsyncClient.exe
1732	AsyncClient.exe
1732	AsyncClient.exe
1732	AsyncClient.exe
1732	AsyncClient.exe
1732	AsyncClient.exe
1732	AsyncClient.exe
1732	AsyncClient.exe
1732	AsyncClient.exe
1732	AsyncClient.exe
1732	AsyncClient.exe
1732	AsyncClient.exe
1732	AsyncClient.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1732	AsyncClient.exe
Token: SeDebugPrivilege	1972	Windows pro.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1732 wrote to memory of 464	1732	AsyncClient.exe	87
PID 1732 wrote to memory of 464	1732	AsyncClient.exe	87
PID 1732 wrote to memory of 464	1732	AsyncClient.exe	87
PID 1732 wrote to memory of 4468	1732	AsyncClient.exe	89
PID 1732 wrote to memory of 4468	1732	AsyncClient.exe	89
PID 1732 wrote to memory of 4468	1732	AsyncClient.exe	89
PID 464 wrote to memory of 4572	464	cmd.exe	91
PID 464 wrote to memory of 4572	464	cmd.exe	91
PID 464 wrote to memory of 4572	464	cmd.exe	91
PID 4468 wrote to memory of 1044	4468	cmd.exe	92
PID 4468 wrote to memory of 1044	4468	cmd.exe	92
PID 4468 wrote to memory of 1044	4468	cmd.exe	92
PID 4468 wrote to memory of 1972	4468	cmd.exe	93
PID 4468 wrote to memory of 1972	4468	cmd.exe	93
PID 4468 wrote to memory of 1972	4468	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
"C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1732
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Windows pro" /tr '"C:\Users\Admin\AppData\Roaming\Windows pro.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:464
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Windows pro" /tr '"C:\Users\Admin\AppData\Roaming\Windows pro.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4572
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp2AB.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4468
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1044
- - C:\Users\Admin\AppData\Roaming\Windows pro.exe
    "C:\Users\Admin\AppData\Roaming\Windows pro.exe"
    3⤵
    - Executes dropped EXE
    - Sets desktop wallpaper using registry
    - Modifies Control Panel
    - Suspicious use of AdjustPrivilegeToken
    PID:1972

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

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Defacement

1

T1491

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp2AB.tmp.bat

Filesize
154B

MD5
5bc05395538c3c6190052e9ce0d0aa92

SHA1
afc2b64a2da4ed1aa0974976283a2a61349b15b3

SHA256
277b045be610ff23312c31b6440ed6d5cb679008e6208c01a37ae6ba19e809ac

SHA512
c26583bec9ef225f5a777ee81a80b49a1c1b8eb5681327127a2bac29d54434a2e0e66a7ed1323b621a36dbeaf540f90ff983e2f8bbdc8b1fbd83d82d544bae27

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp3411.tmp.png

Filesize
215KB

MD5
e3ca44d48204a248456de3a82f72b5e5

SHA1
5e9469c0eb44fc4a94af10dff9f741bbe7ecc4d6

SHA256
6276a5bbdbeb3067fc14c823a6abde2054dd4beef6b686556870a37c01892577

SHA512
5caa29e218dcd1c8e75d7a0a0fd4a81104f369af34a9782d5670f1b6688f331f5d271ba9d165ba4d77825fcb6496a788c4d04bc0aa92b4ea351d7b6553368c12

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C:\Users\Admin\AppData\Roaming\Windows pro.exe

Filesize
47KB

MD5
bfcd5b55f364dad8c1920e9ffef8e5e0

SHA1
3c2f7d0f466209ce1e77dc83dbe3bbf7633bc9a7

SHA256
70470ff2191ba5a398f4e3d83c798d00cf676f36caf77054e796448c7c6d47b9

SHA512
9a0ae743936b07ef641a9990c2007d56ea9dab81791f78a1c3c4005e2c57d41325f95ed06043e2c8efeb92a220e97c0bf48966468f960c8ac6992b606435b8d5

Download Submit
memory/1732-1-0x0000000000580000-0x0000000000592000-memory.dmp

Filesize
72KB

Download
memory/1732-2-0x0000000074EC0000-0x0000000075671000-memory.dmp

Filesize
7.7MB

Download
memory/1732-3-0x0000000004FE0000-0x0000000005046000-memory.dmp

Filesize
408KB

Download
memory/1732-4-0x0000000005480000-0x000000000551C000-memory.dmp

Filesize
624KB

Download
memory/1732-9-0x0000000074EC0000-0x0000000075671000-memory.dmp

Filesize
7.7MB

Download
memory/1732-0-0x0000000074ECE000-0x0000000074ECF000-memory.dmp

Filesize
4KB

Download
memory/1972-14-0x0000000074EC0000-0x0000000075671000-memory.dmp

Filesize
7.7MB

Download
memory/1972-18-0x00000000067D0000-0x0000000006846000-memory.dmp

Filesize
472KB

Download
memory/1972-19-0x0000000006750000-0x00000000067B8000-memory.dmp

Filesize
416KB

Download
memory/1972-20-0x0000000006880000-0x000000000689E000-memory.dmp

Filesize
120KB

Download
memory/1972-21-0x00000000069C0000-0x0000000006A52000-memory.dmp

Filesize
584KB

Download
memory/1972-22-0x0000000074EC0000-0x0000000075671000-memory.dmp

Filesize
7.7MB

Download
memory/1972-23-0x0000000005AF0000-0x0000000005B54000-memory.dmp

Filesize
400KB

Download
memory/1972-17-0x00000000060A0000-0x0000000006646000-memory.dmp

Filesize
5.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads