asyncrat | b2f20f38ab8db652c4bde2249f32f5916f8376f882059d3d07a5cccf232b40e0

General

Target

Client1.exe
Size

48KB
MD5

bfd2e3a5b4e15ccd7dfd6b4911e3c7e4
SHA1

1396456c85cab058901217b31001b165992b3347
SHA256

b2f20f38ab8db652c4bde2249f32f5916f8376f882059d3d07a5cccf232b40e0
SHA512

6295ffb23980842fda55714db45a8ae71aa52c0bc76d33f28d5db9d6948f5d52a1970732551645eaccb02dc977c8b0ebd327b0d69c995922185e0c4a6d019a0c
SSDEEP

768:kBJmQiGybcILcGIl+jiPY/ah+diRi++98Ybnge4rvEgK/JHZVc6KN:kBigFeqXx+9zbgdrnkJHZVclN

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

Mutex

DcRatMutex_qwqdanchun

Attributes

delay
1
install
true
install_file
apex.exe
install_folder
%AppData%
pastebin_config
https://pastebin.com/raw/vtRDA9rk

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/0x0008000000016d74-15.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2896	apex.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs

Web Service

T1102

flow	ioc
5	pastebin.com
6	4.tcp.eu.ngrok.io
4	pastebin.com

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
2744	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
2748	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2440	Client1.exe
2440	Client1.exe
2440	Client1.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2440	Client1.exe
Token: SeDebugPrivilege	2896	apex.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2440 wrote to memory of 2716	2440	Client1.exe	31
PID 2440 wrote to memory of 2716	2440	Client1.exe	31
PID 2440 wrote to memory of 2716	2440	Client1.exe	31
PID 2440 wrote to memory of 2092	2440	Client1.exe	33
PID 2440 wrote to memory of 2092	2440	Client1.exe	33
PID 2440 wrote to memory of 2092	2440	Client1.exe	33
PID 2092 wrote to memory of 2744	2092	cmd.exe	35
PID 2092 wrote to memory of 2744	2092	cmd.exe	35
PID 2092 wrote to memory of 2744	2092	cmd.exe	35
PID 2716 wrote to memory of 2748	2716	cmd.exe	36
PID 2716 wrote to memory of 2748	2716	cmd.exe	36
PID 2716 wrote to memory of 2748	2716	cmd.exe	36
PID 2092 wrote to memory of 2896	2092	cmd.exe	37
PID 2092 wrote to memory of 2896	2092	cmd.exe	37
PID 2092 wrote to memory of 2896	2092	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\Client1.exe
"C:\Users\Admin\AppData\Local\Temp\Client1.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2440
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "apex" /tr '"C:\Users\Admin\AppData\Roaming\apex.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2716
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "apex" /tr '"C:\Users\Admin\AppData\Roaming\apex.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2748
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp2BF.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2092
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2744
- - C:\Users\Admin\AppData\Roaming\apex.exe
    "C:\Users\Admin\AppData\Roaming\apex.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2896

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

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Cab10E4.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp2BF.tmp.bat

Filesize
147B

MD5
df06ac22d2e938922fca1d2199f46806

SHA1
49642f64c53929a24fe58d62f3a0f2dcc49a6d3d

SHA256
006d0a5b04c7e4fa4ab9fbc4479cb8cdad3902171d37db8f4c2a78fd0d9ed219

SHA512
7a78a50fa7bceab80d4a602b885049240debc5ca4c2ee89b5f2a4c3af5374f32045d4b312851a7a70e5c2da9e0abaca69166884c15f9190d04ee2de81500ec12

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

Filesize
48KB

MD5
bfd2e3a5b4e15ccd7dfd6b4911e3c7e4

SHA1
1396456c85cab058901217b31001b165992b3347

SHA256
b2f20f38ab8db652c4bde2249f32f5916f8376f882059d3d07a5cccf232b40e0

SHA512
6295ffb23980842fda55714db45a8ae71aa52c0bc76d33f28d5db9d6948f5d52a1970732551645eaccb02dc977c8b0ebd327b0d69c995922185e0c4a6d019a0c

Download Submit
memory/2440-0-0x000007FEF4D53000-0x000007FEF4D54000-memory.dmp

Filesize
4KB

Download
memory/2440-1-0x0000000001160000-0x0000000001172000-memory.dmp

Filesize
72KB

Download
memory/2440-2-0x000007FEF4D50000-0x000007FEF573C000-memory.dmp

Filesize
9.9MB

Download
memory/2440-12-0x000007FEF4D50000-0x000007FEF573C000-memory.dmp

Filesize
9.9MB

Download
memory/2896-16-0x00000000009A0000-0x00000000009B2000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads