asyncrat | 5a795b61061d87a5f65f45399e9ac79d6ae79eecc5e90ddf780fef895c5f4c38

Analysis

max time kernel
117s
max time network
143s
platform
windows7_x64
resource
win7-en-20211208
submitted
26/12/2021, 12:17

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General

Target
b7ac251f1f64b310afcab4a04df540e2.exe
Size 221KB
Sample211226-pf2daaaagq
SHA256 5a795b61061d87a5f65f45399e9ac79d6ae79eecc5e90ddf780fef895c5f4c38
MD5 b7ac251f1f64b310afcab4a04df540e2
SHA1 5fc2d7c7881feef084b7e2b41ac1bc58e056517d
SHA512 da6f4dc8c5cd3004d9ee71b0480ccbd95f2e98f64d16b3cc22c60192d5c01d54851a90c6d1aaf80aa721d2b614842369a546000bd6007a519775cd2a76694418
MD5 SHA1 SHA512

Score

10^/10

asyncrat rat suricata

Malware Config

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat
suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)
suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)
suricata

Async RAT payload 9 IoCs

rat

resource	yara_rule
behavioral1/memory/768-62-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/768-63-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/768-64-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/768-65-0x000000000040D08E-mapping.dmp	asyncrat
behavioral1/memory/768-66-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/768-67-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1104-89-0x000000000040D08E-mapping.dmp	asyncrat
behavioral1/memory/1104-91-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/1104-92-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Executes dropped EXE 2 IoCs

pid	Process
1588	DriiveUpdta.exe
1104	DriiveUpdta.exe

Loads dropped DLL 1 IoCs

pid	Process
820	cmd.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 960 set thread context of 768	960	b7ac251f1f64b310afcab4a04df540e2.exe	27
PID 1588 set thread context of 1104	1588	DriiveUpdta.exe	37

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
1820	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1052	timeout.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
960	b7ac251f1f64b310afcab4a04df540e2.exe
960	b7ac251f1f64b310afcab4a04df540e2.exe
768	b7ac251f1f64b310afcab4a04df540e2.exe
768	b7ac251f1f64b310afcab4a04df540e2.exe
1588	DriiveUpdta.exe
1588	DriiveUpdta.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	960	b7ac251f1f64b310afcab4a04df540e2.exe
Token: SeDebugPrivilege	768	b7ac251f1f64b310afcab4a04df540e2.exe
Token: SeDebugPrivilege	1588	DriiveUpdta.exe
Token: SeDebugPrivilege	1104	DriiveUpdta.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 960 wrote to memory of 768	960	b7ac251f1f64b310afcab4a04df540e2.exe	27
PID 960 wrote to memory of 768	960	b7ac251f1f64b310afcab4a04df540e2.exe	27
PID 960 wrote to memory of 768	960	b7ac251f1f64b310afcab4a04df540e2.exe	27
PID 960 wrote to memory of 768	960	b7ac251f1f64b310afcab4a04df540e2.exe	27
PID 960 wrote to memory of 768	960	b7ac251f1f64b310afcab4a04df540e2.exe	27
PID 960 wrote to memory of 768	960	b7ac251f1f64b310afcab4a04df540e2.exe	27
PID 960 wrote to memory of 768	960	b7ac251f1f64b310afcab4a04df540e2.exe	27
PID 960 wrote to memory of 768	960	b7ac251f1f64b310afcab4a04df540e2.exe	27
PID 960 wrote to memory of 768	960	b7ac251f1f64b310afcab4a04df540e2.exe	27
PID 768 wrote to memory of 364	768	b7ac251f1f64b310afcab4a04df540e2.exe	28
PID 768 wrote to memory of 364	768	b7ac251f1f64b310afcab4a04df540e2.exe	28
PID 768 wrote to memory of 364	768	b7ac251f1f64b310afcab4a04df540e2.exe	28
PID 768 wrote to memory of 364	768	b7ac251f1f64b310afcab4a04df540e2.exe	28
PID 768 wrote to memory of 820	768	b7ac251f1f64b310afcab4a04df540e2.exe	30
PID 768 wrote to memory of 820	768	b7ac251f1f64b310afcab4a04df540e2.exe	30
PID 768 wrote to memory of 820	768	b7ac251f1f64b310afcab4a04df540e2.exe	30
PID 768 wrote to memory of 820	768	b7ac251f1f64b310afcab4a04df540e2.exe	30
PID 364 wrote to memory of 1820	364	cmd.exe	32
PID 364 wrote to memory of 1820	364	cmd.exe	32
PID 364 wrote to memory of 1820	364	cmd.exe	32
PID 364 wrote to memory of 1820	364	cmd.exe	32
PID 820 wrote to memory of 1052	820	cmd.exe	33
PID 820 wrote to memory of 1052	820	cmd.exe	33
PID 820 wrote to memory of 1052	820	cmd.exe	33
PID 820 wrote to memory of 1052	820	cmd.exe	33
PID 820 wrote to memory of 1588	820	cmd.exe	34
PID 820 wrote to memory of 1588	820	cmd.exe	34
PID 820 wrote to memory of 1588	820	cmd.exe	34
PID 820 wrote to memory of 1588	820	cmd.exe	34
PID 1588 wrote to memory of 1104	1588	DriiveUpdta.exe	37
PID 1588 wrote to memory of 1104	1588	DriiveUpdta.exe	37
PID 1588 wrote to memory of 1104	1588	DriiveUpdta.exe	37
PID 1588 wrote to memory of 1104	1588	DriiveUpdta.exe	37
PID 1588 wrote to memory of 1104	1588	DriiveUpdta.exe	37
PID 1588 wrote to memory of 1104	1588	DriiveUpdta.exe	37
PID 1588 wrote to memory of 1104	1588	DriiveUpdta.exe	37
PID 1588 wrote to memory of 1104	1588	DriiveUpdta.exe	37
PID 1588 wrote to memory of 1104	1588	DriiveUpdta.exe	37

C:\Users\Admin\AppData\Local\Temp\b7ac251f1f64b310afcab4a04df540e2.exe
"C:\Users\Admin\AppData\Local\Temp\b7ac251f1f64b310afcab4a04df540e2.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:960
- C:\Users\Admin\AppData\Local\Temp\b7ac251f1f64b310afcab4a04df540e2.exe
  "C:\Users\Admin\AppData\Local\Temp\b7ac251f1f64b310afcab4a04df540e2.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:768
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "DriiveUpdta" /tr '"C:\Users\Admin\AppData\Roaming\DriiveUpdta.exe"' & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:364
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "DriiveUpdta" /tr '"C:\Users\Admin\AppData\Roaming\DriiveUpdta.exe"'
      4⤵
      Creates scheduled task(s)
      PID:1820
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp86AD.tmp.bat""
    3⤵
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:820
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:1052
  - - C:\Users\Admin\AppData\Roaming\DriiveUpdta.exe
      "C:\Users\Admin\AppData\Roaming\DriiveUpdta.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:1588
    - - C:\Users\Admin\AppData\Roaming\DriiveUpdta.exe
        
        "C:\Users\Admin\AppData\Roaming\DriiveUpdta.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:1104

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/768-60-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/768-61-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/768-62-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/768-63-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/768-64-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/768-66-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/768-67-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/768-69-0x0000000004B60000-0x0000000004B61000-memory.dmp

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memory/960-59-0x00000000020F0000-0x0000000002128000-memory.dmp

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memory/960-58-0x00000000004B0000-0x00000000004C0000-memory.dmp

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memory/960-57-0x0000000004D30000-0x0000000004D31000-memory.dmp

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memory/960-56-0x0000000075D61000-0x0000000075D63000-memory.dmp

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memory/960-54-0x00000000008B0000-0x00000000008EC000-memory.dmp

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memory/960-55-0x00000000008B0000-0x00000000008EC000-memory.dmp

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memory/1104-94-0x0000000004A20000-0x0000000004A21000-memory.dmp

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memory/1104-92-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1104-91-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/1588-79-0x0000000000B20000-0x0000000000B5C000-memory.dmp

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memory/1588-83-0x0000000000860000-0x0000000000898000-memory.dmp

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memory/1588-82-0x0000000000460000-0x0000000000470000-memory.dmp

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memory/1588-81-0x0000000004ED0000-0x0000000004ED1000-memory.dmp

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memory/1588-80-0x0000000000B20000-0x0000000000B5C000-memory.dmp

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