asyncrat | 79ce55142b53b2fcc73a500ab3f1c6f915dfba711fa32b199c59a47cf9243db5

General

Target
Receipt.exe
Size 386KB
Sample200717-kctrjyqnyx
SHA256 79ce55142b53b2fcc73a500ab3f1c6f915dfba711fa32b199c59a47cf9243db5
MD5 7dfeaca6f4cb0b97eb9c377dac3eae6a
SHA1 1eab4f7a3af733255b07d0f22b5fe414ee0b6f6c
SHA512 f6c9d933e36f464c08e82258f998a7e134d888b0209db16438c9533cffaee55adaada29f98658c3086cf514bb391ffb1225e7a2d0232db9a374314d0be06b636
MD5 SHA1 SHA512

Score

10^/10

asyncrat persistence rat

Malware Config

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat

Async RAT payload 3 IoCs

rat

resource	yara_rule
behavioral1/files/0x00040000000131a8-5.dat	asyncrat
behavioral1/files/0x00040000000131a8-7.dat	asyncrat
behavioral1/files/0x00040000000131a8-8.dat	asyncrat

Executes dropped EXE 1 IoCs

pid	Process
684	css.exe

Loads dropped DLL 1 IoCs

pid	Process
1092	Receipt.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-910373003-3952921535-3480519689-1000\Software\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-910373003-3952921535-3480519689-1000\Software\Microsoft\Windows\CurrentVersion\Run\css = "C:\\Windows\\system32\\pcalua.exe -a C:\\Users\\Admin\\AppData\\Roaming\\css.exe"	reg.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1092	Receipt.exe
1092	Receipt.exe
1092	Receipt.exe
684	css.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1092	Receipt.exe
Token: SeDebugPrivilege	684	css.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1092 wrote to memory of 1812	1092	Receipt.exe	26
PID 1092 wrote to memory of 1812	1092	Receipt.exe	26
PID 1092 wrote to memory of 1812	1092	Receipt.exe	26
PID 1092 wrote to memory of 1812	1092	Receipt.exe	26
PID 1812 wrote to memory of 1724	1812	cmd.exe	28
PID 1812 wrote to memory of 1724	1812	cmd.exe	28
PID 1812 wrote to memory of 1724	1812	cmd.exe	28
PID 1812 wrote to memory of 1724	1812	cmd.exe	28
PID 1092 wrote to memory of 684	1092	Receipt.exe	29
PID 1092 wrote to memory of 684	1092	Receipt.exe	29
PID 1092 wrote to memory of 684	1092	Receipt.exe	29
PID 1092 wrote to memory of 684	1092	Receipt.exe	29

C:\Users\Admin\AppData\Local\Temp\Receipt.exe
"C:\Users\Admin\AppData\Local\Temp\Receipt.exe"
1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1092
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v css /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\css.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1812
- - C:\Windows\SysWOW64\reg.exe
    REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v css /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\css.exe"
    3⤵
    - Adds Run key to start application
    PID:1724
- C:\Users\Admin\AppData\Roaming\css.exe
  "C:\Users\Admin\AppData\Roaming\css.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:684

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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