asyncrat | 430407cd2dc4ffbdf3423a871caaf431984ee6dc2475bcff64c506919a1e28a0

General

Target

Client.exe
Size

63KB
MD5

cb6a1f003f6937e3275c90bf3d8e7408
SHA1

922efe4440e8d9966e7f47294b3ff9882c325a55
SHA256

430407cd2dc4ffbdf3423a871caaf431984ee6dc2475bcff64c506919a1e28a0
SHA512

3c57b39be6378036d4a5de80aa35139c34965b76ce35b4d22e25f59202d0f5b2665ad9f35e77b47b423060cd00e0c78c20456a99054d705f008fef3cec9c92ea
SSDEEP

1536:ihgjnR1Aio/cxbDc4m7nVeeiMl8GbbXwRnb+GpZVclN:ihgjnR1Aio/cxbDcnnoeFmGbbXQnbrzY

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

127.0.0.1:8848

Mutex

DcRatMutex_qwqdanchun

Attributes

delay
1
install
true
install_file
MinecraftUpdater.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/0x000b000000012245-15.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2060	MinecraftUpdater.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
1284	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1328	Client.exe
1328	Client.exe
1328	Client.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1328	Client.exe
Token: SeDebugPrivilege	2060	MinecraftUpdater.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1328 wrote to memory of 1476	1328	Client.exe	30
PID 1328 wrote to memory of 1476	1328	Client.exe	30
PID 1328 wrote to memory of 1476	1328	Client.exe	30
PID 1328 wrote to memory of 1160	1328	Client.exe	32
PID 1328 wrote to memory of 1160	1328	Client.exe	32
PID 1328 wrote to memory of 1160	1328	Client.exe	32
PID 1476 wrote to memory of 1284	1476	cmd.exe	34
PID 1476 wrote to memory of 1284	1476	cmd.exe	34
PID 1476 wrote to memory of 1284	1476	cmd.exe	34
PID 1160 wrote to memory of 2908	1160	cmd.exe	35
PID 1160 wrote to memory of 2908	1160	cmd.exe	35
PID 1160 wrote to memory of 2908	1160	cmd.exe	35
PID 1160 wrote to memory of 2060	1160	cmd.exe	37
PID 1160 wrote to memory of 2060	1160	cmd.exe	37
PID 1160 wrote to memory of 2060	1160	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\Client.exe
"C:\Users\Admin\AppData\Local\Temp\Client.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 "MinecraftUpdater" /tr '"C:\Users\Admin\AppData\Roaming\MinecraftUpdater.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1476
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "MinecraftUpdater" /tr '"C:\Users\Admin\AppData\Roaming\MinecraftUpdater.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1284
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpC8AC.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1160
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2908
- - C:\Users\Admin\AppData\Roaming\MinecraftUpdater.exe
    "C:\Users\Admin\AppData\Roaming\MinecraftUpdater.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2060

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\tmpC8AC.tmp.bat

Filesize
160B

MD5
e8f85a12f4b87e0365c4a2e775957e45

SHA1
63de744395d020e5256ce63cd4cc68b32bd20bd2

SHA256
1b279f2dbb8b400d0e83f50ecce55fa98d5cb9d2b1b38a692238c1640be80f62

SHA512
fd7cdbb0b627daf63fdaf1c5dfed05f018a66ba8e181a8656e215e6c474f62ad09b25ca8e99a90945e7b566eae442ebfa2e804aac7f7c654ee74d8625245bf37

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

Filesize
63KB

MD5
cb6a1f003f6937e3275c90bf3d8e7408

SHA1
922efe4440e8d9966e7f47294b3ff9882c325a55

SHA256
430407cd2dc4ffbdf3423a871caaf431984ee6dc2475bcff64c506919a1e28a0

SHA512
3c57b39be6378036d4a5de80aa35139c34965b76ce35b4d22e25f59202d0f5b2665ad9f35e77b47b423060cd00e0c78c20456a99054d705f008fef3cec9c92ea

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

Filesize
4KB

Download
memory/1328-1-0x0000000000BA0000-0x0000000000BB6000-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/1328-12-0x000007FEF5280000-0x000007FEF5C6C000-memory.dmp

Filesize
9.9MB

Download
memory/2060-17-0x0000000000A80000-0x0000000000A96000-memory.dmp

Filesize
88KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads