asyncrat | 2bb00b6059c1b0dacc9e952ccc1f819b09542f17eda7994a40d7ea361935ac34

General

Target

Infected.exe
Size

63KB
MD5

d1642320b4b4733552b78f746ccc2287
SHA1

bc473457b7a95e6bf31f87645ee021041f818afc
SHA256

2bb00b6059c1b0dacc9e952ccc1f819b09542f17eda7994a40d7ea361935ac34
SHA512

680c7ecfadd4203f673db5fd4e7d245bda57cc3aa49cd52cf9cbad3dfc0001331d206e90a255f2a1687bab5fbb482fa4cb288e167fd39287cdcaa5c11bea2542
SSDEEP

768:iil3pYNlrm78RIC8A+XjqazcBRL5JTk1+T4KSBGHmDbD/ph0oXz60m1avA74Su4V:Dyr0AdSJYUbdh9i15ju4dpqKmY7

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

147.185.221.23:64395

Attributes

delay
1
install
true
install_file
sigma.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

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\sigma.exe	family_asyncrat

Executes dropped EXE 1 IoCs

Processes:

sigma.exe

pid process

2572 sigma.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

Processes:

timeout.exe

pid process

2752 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

Processes:

schtasks.exe

pid process

536 schtasks.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

Infected.exe

pid process

2784 Infected.exe
2784 Infected.exe
2784 Infected.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Infected.exesigma.exe

description pid process

Token: SeDebugPrivilege 2784 Infected.exe
Token: SeDebugPrivilege 2572 sigma.exe

pid	process
2572	sigma.exe

pid	process
2752	timeout.exe

pid	process
536	schtasks.exe

pid	process
2784	Infected.exe
2784	Infected.exe
2784	Infected.exe

description	pid	process
Token: SeDebugPrivilege	2784	Infected.exe
Token: SeDebugPrivilege	2572	sigma.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

Infected.execmd.execmd.exe

description	pid	process	target process
PID 2784 wrote to memory of 2268	2784	Infected.exe	cmd.exe
PID 2784 wrote to memory of 2268	2784	Infected.exe	cmd.exe
PID 2784 wrote to memory of 2268	2784	Infected.exe	cmd.exe
PID 2784 wrote to memory of 2916	2784	Infected.exe	cmd.exe
PID 2784 wrote to memory of 2916	2784	Infected.exe	cmd.exe
PID 2784 wrote to memory of 2916	2784	Infected.exe	cmd.exe
PID 2916 wrote to memory of 2752	2916	cmd.exe	timeout.exe
PID 2916 wrote to memory of 2752	2916	cmd.exe	timeout.exe
PID 2916 wrote to memory of 2752	2916	cmd.exe	timeout.exe
PID 2268 wrote to memory of 536	2268	cmd.exe	schtasks.exe
PID 2268 wrote to memory of 536	2268	cmd.exe	schtasks.exe
PID 2268 wrote to memory of 536	2268	cmd.exe	schtasks.exe
PID 2916 wrote to memory of 2572	2916	cmd.exe	sigma.exe
PID 2916 wrote to memory of 2572	2916	cmd.exe	sigma.exe
PID 2916 wrote to memory of 2572	2916	cmd.exe	sigma.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\Infected.exe
"C:\Users\Admin\AppData\Local\Temp\Infected.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2784
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "sigma" /tr '"C:\Users\Admin\AppData\Roaming\sigma.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2268
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "sigma" /tr '"C:\Users\Admin\AppData\Roaming\sigma.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:536
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp7BB5.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2916
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2752
- - C:\Users\Admin\AppData\Roaming\sigma.exe
    "C:\Users\Admin\AppData\Roaming\sigma.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2572

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\CabB933.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp7BB5.tmp.bat

Filesize
149B

MD5
9ef18d5b1e83283709a21d62d9edd192

SHA1
1d7b5345f8cf41256b45c81982f211253a0bfefd

SHA256
4189a7d9c958fa880920d4efab133edb92c28b3f3e9b26f44b8b4f6d40fcf0cd

SHA512
3b25f8f46c9ff7e6b3da502c935089c1c4b1f34f322eaa50195b0db0fb76e210695062b577a53fb1155f5c5163a4748b4e56db5b6b8d18ae4e3ff7c83ac17116

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

Filesize
63KB

MD5
d1642320b4b4733552b78f746ccc2287

SHA1
bc473457b7a95e6bf31f87645ee021041f818afc

SHA256
2bb00b6059c1b0dacc9e952ccc1f819b09542f17eda7994a40d7ea361935ac34

SHA512
680c7ecfadd4203f673db5fd4e7d245bda57cc3aa49cd52cf9cbad3dfc0001331d206e90a255f2a1687bab5fbb482fa4cb288e167fd39287cdcaa5c11bea2542

Download Submit
memory/2572-17-0x0000000001250000-0x0000000001266000-memory.dmp

Filesize
88KB

Download
memory/2784-0-0x000007FEF5FB3000-0x000007FEF5FB4000-memory.dmp

Filesize
4KB

Download
memory/2784-1-0x0000000000C70000-0x0000000000C86000-memory.dmp

Filesize
88KB

Download
memory/2784-2-0x000007FEF5FB0000-0x000007FEF699C000-memory.dmp

Filesize
9.9MB

Download
memory/2784-3-0x000007FEF5FB0000-0x000007FEF699C000-memory.dmp

Filesize
9.9MB

Download
memory/2784-13-0x000007FEF5FB0000-0x000007FEF699C000-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