asyncrat | 1a36fec822c22bf439fc2d4355d3baf53dece6eebc94ffdb2f1ae213e9691a1a

General

Target

V3xSolarafixer.exe
Size

63KB
MD5

50d116e9767adfb337a4102c5cc454f6
SHA1

72a09cb78c5bf8cef60749d3de5d49e9aff181ca
SHA256

1a36fec822c22bf439fc2d4355d3baf53dece6eebc94ffdb2f1ae213e9691a1a
SHA512

75b805ee405105f2c069234f4252553cacfe21de86b78cdbe36b4bbeb77326553c9d9d0e63b27fae7277e0886b06d84db5fc2a7d3b1aec06f51eeac8d6402428
SSDEEP

768:QE85qOJnVh78b8C8A+Xw9rb3Da5tvWmEe1+T4kSBGHmDbDqph5oXyEotA3SuUdph:K9VvTt+mBXYUb0hYyKiuUdpqKmY7

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

193.161.193.99:36700

Attributes

delay
1
install
true
install_file
syskprvalr.exe
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x000d0000000133b8-15.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
1284	syskprvalr.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
2760	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
2880	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1976	V3xSolarafixer.exe
1976	V3xSolarafixer.exe
1976	V3xSolarafixer.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1976	V3xSolarafixer.exe
Token: SeDebugPrivilege	1284	syskprvalr.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1976 wrote to memory of 2216	1976	V3xSolarafixer.exe	30
PID 1976 wrote to memory of 2216	1976	V3xSolarafixer.exe	30
PID 1976 wrote to memory of 2216	1976	V3xSolarafixer.exe	30
PID 1976 wrote to memory of 2824	1976	V3xSolarafixer.exe	32
PID 1976 wrote to memory of 2824	1976	V3xSolarafixer.exe	32
PID 1976 wrote to memory of 2824	1976	V3xSolarafixer.exe	32
PID 2216 wrote to memory of 2880	2216	cmd.exe	34
PID 2216 wrote to memory of 2880	2216	cmd.exe	34
PID 2216 wrote to memory of 2880	2216	cmd.exe	34
PID 2824 wrote to memory of 2760	2824	cmd.exe	35
PID 2824 wrote to memory of 2760	2824	cmd.exe	35
PID 2824 wrote to memory of 2760	2824	cmd.exe	35
PID 2824 wrote to memory of 1284	2824	cmd.exe	36
PID 2824 wrote to memory of 1284	2824	cmd.exe	36
PID 2824 wrote to memory of 1284	2824	cmd.exe	36

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\V3xSolarafixer.exe
"C:\Users\Admin\AppData\Local\Temp\V3xSolarafixer.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1976
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "syskprvalr" /tr '"C:\Users\Admin\AppData\Roaming\syskprvalr.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2216
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "syskprvalr" /tr '"C:\Users\Admin\AppData\Roaming\syskprvalr.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2880
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp273F.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2824
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2760
- - C:\Users\Admin\AppData\Roaming\syskprvalr.exe
    "C:\Users\Admin\AppData\Roaming\syskprvalr.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:1284

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

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\CabADDE.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp273F.tmp.bat

Filesize
154B

MD5
605f8846b59a15e0d296ef6f6b174ebf

SHA1
0622d5de2b721ee1ba377ee09a9bcb8374cd1cab

SHA256
d4efa3bb177949c1ea98e2447d3eb9ce81674bc1be6bd982a8decbabb45be2a3

SHA512
bdd3d55867dc15892299360326c4d34003cc15dc8cf734cbc4b405abfa602fa64f5a12c408232b8568829fa1d264af74364f9eba24fa5c5fc7a457d673d772d3

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

Filesize
63KB

MD5
50d116e9767adfb337a4102c5cc454f6

SHA1
72a09cb78c5bf8cef60749d3de5d49e9aff181ca

SHA256
1a36fec822c22bf439fc2d4355d3baf53dece6eebc94ffdb2f1ae213e9691a1a

SHA512
75b805ee405105f2c069234f4252553cacfe21de86b78cdbe36b4bbeb77326553c9d9d0e63b27fae7277e0886b06d84db5fc2a7d3b1aec06f51eeac8d6402428

Download Submit
memory/1284-17-0x00000000011C0000-0x00000000011D6000-memory.dmp

Filesize
88KB

Download
memory/1976-0-0x000007FEF5EF3000-0x000007FEF5EF4000-memory.dmp

Filesize
4KB

Download
memory/1976-1-0x00000000008F0000-0x0000000000906000-memory.dmp

Filesize
88KB

Download
memory/1976-2-0x000007FEF5EF0000-0x000007FEF68DC000-memory.dmp

Filesize
9.9MB

Download
memory/1976-3-0x000007FEF5EF0000-0x000007FEF68DC000-memory.dmp

Filesize
9.9MB

Download
memory/1976-12-0x000007FEF5EF0000-0x000007FEF68DC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads