asyncrat | ac038502c851488f63a577e3b51c951892c8104934ca68e05bffe8b12a3099bc

General

Target

Infected.exe
Size

63KB
MD5

ed84599b85e02fc16b0763d9158e7691
SHA1

d508b2240df9c3b36ea315aab8370ab6d76724b2
SHA256

ac038502c851488f63a577e3b51c951892c8104934ca68e05bffe8b12a3099bc
SHA512

b55cdeaeda4070f6bdce9516d47bc5037177704d9fa4ea02866bd9804ef1d8f2dd035625709b4d52d8ac4db3497bb06f2c4e19f80de5eafd8321b09897e07515
SSDEEP

768:ZJ4BeNf5g78fIC8A+XayazcBRL5JTk1+T4KSBGHmDbD/ph0oX78vsRSukdpqKYhg:cq5UZdSJYUbdh9wEoukdpqKmY7

Score

10^/10

asyncrat breeze rat

Malware Config

Extracted

Family

asyncrat

Botnet

Breeze

C2

FederalServices-21439.portmap.host:21439

Attributes

delay
1
install
true
install_file
service.exe
install_folder
%Temp%

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/0x000b000000012245-16.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2744	service.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
2908	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
1312	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1328	Infected.exe
1328	Infected.exe
1328	Infected.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1328	Infected.exe
Token: SeDebugPrivilege	2744	service.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1328 wrote to memory of 1476	1328	Infected.exe	30
PID 1328 wrote to memory of 1476	1328	Infected.exe	30
PID 1328 wrote to memory of 1476	1328	Infected.exe	30
PID 1328 wrote to memory of 1892	1328	Infected.exe	32
PID 1328 wrote to memory of 1892	1328	Infected.exe	32
PID 1328 wrote to memory of 1892	1328	Infected.exe	32
PID 1476 wrote to memory of 1312	1476	cmd.exe	34
PID 1476 wrote to memory of 1312	1476	cmd.exe	34
PID 1476 wrote to memory of 1312	1476	cmd.exe	34
PID 1892 wrote to memory of 2908	1892	cmd.exe	35
PID 1892 wrote to memory of 2908	1892	cmd.exe	35
PID 1892 wrote to memory of 2908	1892	cmd.exe	35
PID 1892 wrote to memory of 2744	1892	cmd.exe	37
PID 1892 wrote to memory of 2744	1892	cmd.exe	37
PID 1892 wrote to memory of 2744	1892	cmd.exe	37

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\Infected.exe
"C:\Users\Admin\AppData\Local\Temp\Infected.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1328
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "service" /tr '"C:\Users\Admin\AppData\Local\Temp\service.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1476
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "service" /tr '"C:\Users\Admin\AppData\Local\Temp\service.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1312
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpC810.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1892
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2908
- - C:\Users\Admin\AppData\Local\Temp\service.exe
    "C:\Users\Admin\AppData\Local\Temp\service.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2744

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\Cab5FDE.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

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

Filesize
63KB

MD5
ed84599b85e02fc16b0763d9158e7691

SHA1
d508b2240df9c3b36ea315aab8370ab6d76724b2

SHA256
ac038502c851488f63a577e3b51c951892c8104934ca68e05bffe8b12a3099bc

SHA512
b55cdeaeda4070f6bdce9516d47bc5037177704d9fa4ea02866bd9804ef1d8f2dd035625709b4d52d8ac4db3497bb06f2c4e19f80de5eafd8321b09897e07515

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpC810.tmp.bat

Filesize
154B

MD5
e917593e330f71fc46fe1114ca70893d

SHA1
72c261d9f51690bb8a6eeb8010529012bc9aff76

SHA256
537524150c97ebf2ae9c9712fff5cf7a872bbf590109be7f3456cd212d44e44a

SHA512
219bc5125d93d0754c142bbfa8edd4475a493d9bf584ad67fd5c9df268ab090fb012647ea02e1efaf584f1d2b453a6b0b398ccb5c54f5c1cc9944c82d0fa5cec

Download Submit
memory/1328-0-0x000007FEF5283000-0x000007FEF5284000-memory.dmp

Filesize
4KB

Download
memory/1328-1-0x0000000000B90000-0x0000000000BA6000-memory.dmp

Filesize
88KB

Download
memory/1328-2-0x000007FEF5280000-0x000007FEF5C6C000-memory.dmp

Filesize
9.9MB

Download
memory/1328-3-0x000007FEF5280000-0x000007FEF5C6C000-memory.dmp

Filesize
9.9MB

Download
memory/1328-13-0x000007FEF5280000-0x000007FEF5C6C000-memory.dmp

Filesize
9.9MB

Download
memory/2744-17-0x00000000003B0000-0x00000000003C6000-memory.dmp

Filesize
88KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads