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

2888 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 2 IoCs
evasion

Processes:

timeout.exetimeout.exe

pid process

2716 timeout.exe
928 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

2500 schtasks.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

Infected.exe

pid process

1704 Infected.exe
1704 Infected.exe
1704 Infected.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Infected.exesigma.exe

description pid process

Token: SeDebugPrivilege 1704 Infected.exe
Token: SeDebugPrivilege 2888 sigma.exe

pid	process
2888	sigma.exe

pid	process
2716	timeout.exe
928	timeout.exe

pid	process
2500	schtasks.exe

pid	process
1704	Infected.exe
1704	Infected.exe
1704	Infected.exe

description	pid	process
Token: SeDebugPrivilege	1704	Infected.exe
Token: SeDebugPrivilege	2888	sigma.exe

Suspicious use of WriteProcessMemory 27 IoCs

Processes:

Infected.execmd.execmd.exesigma.execmd.execmd.exe

description	pid	process	target process
PID 1704 wrote to memory of 1264	1704	Infected.exe	cmd.exe
PID 1704 wrote to memory of 1264	1704	Infected.exe	cmd.exe
PID 1704 wrote to memory of 1264	1704	Infected.exe	cmd.exe
PID 1704 wrote to memory of 1052	1704	Infected.exe	cmd.exe
PID 1704 wrote to memory of 1052	1704	Infected.exe	cmd.exe
PID 1704 wrote to memory of 1052	1704	Infected.exe	cmd.exe
PID 1052 wrote to memory of 2716	1052	cmd.exe	timeout.exe
PID 1052 wrote to memory of 2716	1052	cmd.exe	timeout.exe
PID 1052 wrote to memory of 2716	1052	cmd.exe	timeout.exe
PID 1264 wrote to memory of 2500	1264	cmd.exe	schtasks.exe
PID 1264 wrote to memory of 2500	1264	cmd.exe	schtasks.exe
PID 1264 wrote to memory of 2500	1264	cmd.exe	schtasks.exe
PID 1052 wrote to memory of 2888	1052	cmd.exe	sigma.exe
PID 1052 wrote to memory of 2888	1052	cmd.exe	sigma.exe
PID 1052 wrote to memory of 2888	1052	cmd.exe	sigma.exe
PID 2888 wrote to memory of 1072	2888	sigma.exe	cmd.exe
PID 2888 wrote to memory of 1072	2888	sigma.exe	cmd.exe
PID 2888 wrote to memory of 1072	2888	sigma.exe	cmd.exe
PID 2888 wrote to memory of 2028	2888	sigma.exe	cmd.exe
PID 2888 wrote to memory of 2028	2888	sigma.exe	cmd.exe
PID 2888 wrote to memory of 2028	2888	sigma.exe	cmd.exe
PID 1072 wrote to memory of 1184	1072	cmd.exe	schtasks.exe
PID 1072 wrote to memory of 1184	1072	cmd.exe	schtasks.exe
PID 1072 wrote to memory of 1184	1072	cmd.exe	schtasks.exe
PID 2028 wrote to memory of 928	2028	cmd.exe	timeout.exe
PID 2028 wrote to memory of 928	2028	cmd.exe	timeout.exe
PID 2028 wrote to memory of 928	2028	cmd.exe	timeout.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:1704
- 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:1264
- - 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:2500
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp8B10.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1052
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2716
- - C:\Users\Admin\AppData\Roaming\sigma.exe
    "C:\Users\Admin\AppData\Roaming\sigma.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2888
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /delete /f /tn "sigma"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1072
    - - C:\Windows\system32\schtasks.exe
        
        schtasks /delete /f /tn "sigma"
        5⤵
        
        PID:1184
  - - C:\Windows\system32\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp3CBA.tmp.bat""
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2028
    - - C:\Windows\system32\timeout.exe
        
        timeout 3
        5⤵
        Delays execution with timeout.exe
        
        PID:928

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\CabA121.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar3BED.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp3CBA.tmp.bat

Filesize
154B

MD5
bc2653e0f84b35e0cabff5941a4bcc37

SHA1
b6a79ff1ccad5b85f81cc1b175a0723d1cb2c3a9

SHA256
75c1e679aeff8124968cc8ffd152a966b38b9c71c46f887048467ca02ed069dc

SHA512
ffc064069f3849d3159f37f1fb0eb40ecce55d36ceb5fc3d28f87301c75640d7ee76841dad2a019b018fd4eda6fe41aaee6f832cdfeaf48c6869d32e128cc52a

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp8B10.tmp.bat

Filesize
149B

MD5
5a578f052b58afef45bb3d14bce5f569

SHA1
c1b1d7e76f361f7b131c9c2b3b58bb5f8ca800d9

SHA256
724092d905ee2b5ffa8c479f3cfedb25998f949091017670e9c33f838d702deb

SHA512
1448a5c60058f7926ee03113a764033227016f67a789ef7c9e80f2b9798fdf9f7398d072f73f51c8a3102cbd150c66dc55a728449a75f6879728068ae07e6483

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

Filesize
63KB

MD5
d1642320b4b4733552b78f746ccc2287

SHA1
bc473457b7a95e6bf31f87645ee021041f818afc

SHA256
2bb00b6059c1b0dacc9e952ccc1f819b09542f17eda7994a40d7ea361935ac34

SHA512
680c7ecfadd4203f673db5fd4e7d245bda57cc3aa49cd52cf9cbad3dfc0001331d206e90a255f2a1687bab5fbb482fa4cb288e167fd39287cdcaa5c11bea2542

Download Submit
memory/1704-0-0x000007FEF5A23000-0x000007FEF5A24000-memory.dmp

Filesize
4KB

Download
memory/1704-1-0x00000000008F0000-0x0000000000906000-memory.dmp

Filesize
88KB

Download
memory/1704-2-0x000007FEF5A20000-0x000007FEF640C000-memory.dmp

Filesize
9.9MB

Download
memory/1704-4-0x000007FEF5A20000-0x000007FEF640C000-memory.dmp

Filesize
9.9MB

Download
memory/1704-12-0x000007FEF5A20000-0x000007FEF640C000-memory.dmp

Filesize
9.9MB

Download
memory/2888-17-0x0000000000810000-0x0000000000826000-memory.dmp

Filesize
88KB

Download
memory/2888-35-0x000000001A780000-0x000000001A832000-memory.dmp

Filesize
712KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads