asyncrat | 8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5

Resubmissions

08/08/2023, 23:47

230808-3s617agc32 10

08/08/2023, 09:45

230808-lq9wmabg44 10

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20230703-en
resource tags

arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
submitted
08/08/2023, 09:45

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General

Target

8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe
Size

186KB
MD5

ab161491c05bb4e14c9956bd90dec42f
SHA1

4f3fa749a5ab5aa69fb762c4f438f2759abf2c31
SHA256

8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5
SHA512

530bcb714475e55a8e6d7e23ec785140cc988eb4062a2e21cd8893afd33112c839c8cd2e003224ba8246a47afb17b99040780c738f5342e28ad61776e83f7816
SSDEEP

3072:0v+8ni6dAi2D6r99PsY8qswZHM+JdBsfUKQn1b8oCikdOFqDdI:0v+uT289RZs+7mobkdOFEI

Score

10^/10

asyncrat defaultt rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

DefaultT

greightcethebui.sytes.net:1414

greightcethebui.sytes.net:6767

wreightcethebui.sytes.net:1414

wreightcethebui.sytes.net:6767

Mutex

AsyncMutex_6SI8OkPnW

Attributes

delay
3
install
true
install_file
oscr.exe
install_folder
%AppData%

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/memory/4556-137-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Executes dropped EXE 2 IoCs

pid	Process
2388	oscr.exe
3596	oscr.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4452 set thread context of 4556	4452	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe	81
PID 2388 set thread context of 3596	2388	oscr.exe	97

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

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/Job

T1053

pid	Process
4396	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
700	timeout.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4556	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe
4556	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe
4556	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe
4556	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe
4556	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe
4556	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe
4556	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe
4556	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe
4556	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe
4556	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe
4556	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe
4556	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe
4556	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe
4556	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe
4556	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe
4556	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe
4556	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe
4556	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe
4556	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe
4556	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe
4556	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe
4556	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe
4556	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	4452	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe
Token: SeDebugPrivilege	4556	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe
Token: SeDebugPrivilege	2388	oscr.exe
Token: SeDebugPrivilege	3596	oscr.exe

Suspicious use of WriteProcessMemory 31 IoCs

description	pid	Process	procid_target
PID 4452 wrote to memory of 4556	4452	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe	81
PID 4452 wrote to memory of 4556	4452	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe	81
PID 4452 wrote to memory of 4556	4452	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe	81
PID 4452 wrote to memory of 4556	4452	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe	81
PID 4452 wrote to memory of 4556	4452	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe	81
PID 4452 wrote to memory of 4556	4452	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe	81
PID 4452 wrote to memory of 4556	4452	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe	81
PID 4452 wrote to memory of 4556	4452	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe	81
PID 4556 wrote to memory of 1708	4556	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe	88
PID 4556 wrote to memory of 1708	4556	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe	88
PID 4556 wrote to memory of 1708	4556	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe	88
PID 4556 wrote to memory of 4984	4556	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe	90
PID 4556 wrote to memory of 4984	4556	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe	90
PID 4556 wrote to memory of 4984	4556	8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe	90
PID 1708 wrote to memory of 4396	1708	cmd.exe	92
PID 1708 wrote to memory of 4396	1708	cmd.exe	92
PID 1708 wrote to memory of 4396	1708	cmd.exe	92
PID 4984 wrote to memory of 700	4984	cmd.exe	93
PID 4984 wrote to memory of 700	4984	cmd.exe	93
PID 4984 wrote to memory of 700	4984	cmd.exe	93
PID 4984 wrote to memory of 2388	4984	cmd.exe	96
PID 4984 wrote to memory of 2388	4984	cmd.exe	96
PID 4984 wrote to memory of 2388	4984	cmd.exe	96
PID 2388 wrote to memory of 3596	2388	oscr.exe	97
PID 2388 wrote to memory of 3596	2388	oscr.exe	97
PID 2388 wrote to memory of 3596	2388	oscr.exe	97
PID 2388 wrote to memory of 3596	2388	oscr.exe	97
PID 2388 wrote to memory of 3596	2388	oscr.exe	97
PID 2388 wrote to memory of 3596	2388	oscr.exe	97
PID 2388 wrote to memory of 3596	2388	oscr.exe	97
PID 2388 wrote to memory of 3596	2388	oscr.exe	97

C:\Users\Admin\AppData\Local\Temp\8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe
"C:\Users\Admin\AppData\Local\Temp\8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4452
- C:\Users\Admin\AppData\Local\Temp\8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe
  C:\Users\Admin\AppData\Local\Temp\8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4556
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "oscr" /tr '"C:\Users\Admin\AppData\Roaming\oscr.exe"' & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1708
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "oscr" /tr '"C:\Users\Admin\AppData\Roaming\oscr.exe"'
      4⤵
      Creates scheduled task(s)
      PID:4396
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpE465.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4984
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:700
  - - C:\Users\Admin\AppData\Roaming\oscr.exe
      "C:\Users\Admin\AppData\Roaming\oscr.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:2388
    - - C:\Users\Admin\AppData\Roaming\oscr.exe
        
        C:\Users\Admin\AppData\Roaming\oscr.exe
        5⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:3596

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5.exe.log

Filesize
522B

MD5
0f39d6b9afc039d81ff31f65cbf76826

SHA1
8356d04fe7bba2695d59b6caf5c59f58f3e1a6d8

SHA256
ea16b63ffd431ebf658b903710b6b3a9b8a2eb6814eee3a53b707a342780315d

SHA512
5bad54adb2e32717ef6275f49e2f101dd7e2011c9be14a32e5c29051e8a3f608cbd0b44ac4855ab21e790cb7a5d84c5f69de087074fd01b35259d34d07f5aaf9

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\oscr.exe.log

Filesize
522B

MD5
0f39d6b9afc039d81ff31f65cbf76826

SHA1
8356d04fe7bba2695d59b6caf5c59f58f3e1a6d8

SHA256
ea16b63ffd431ebf658b903710b6b3a9b8a2eb6814eee3a53b707a342780315d

SHA512
5bad54adb2e32717ef6275f49e2f101dd7e2011c9be14a32e5c29051e8a3f608cbd0b44ac4855ab21e790cb7a5d84c5f69de087074fd01b35259d34d07f5aaf9

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpE465.tmp.bat

Filesize
148B

MD5
42d6317cb9cdd6d30594ad0602e2cb85

SHA1
146cb6f7a3d5f14c1205abc46a0b0f3687e492fc

SHA256
133a4d52e3333892ce7ccb76e176961d7c8f75d3e92ba950d93bbfab195e2bda

SHA512
c4f530cddeb7a2bb30fff015994e5f940ef1a3c1d5670c3741cf2118a530afae900fd98a9808f92f905c0fc3e13dcdaccfb089ec1fd9ce495e481803c9aa4939

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

Filesize
186KB

MD5
ab161491c05bb4e14c9956bd90dec42f

SHA1
4f3fa749a5ab5aa69fb762c4f438f2759abf2c31

SHA256
8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5

SHA512
530bcb714475e55a8e6d7e23ec785140cc988eb4062a2e21cd8893afd33112c839c8cd2e003224ba8246a47afb17b99040780c738f5342e28ad61776e83f7816

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

Filesize
186KB

MD5
ab161491c05bb4e14c9956bd90dec42f

SHA1
4f3fa749a5ab5aa69fb762c4f438f2759abf2c31

SHA256
8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5

SHA512
530bcb714475e55a8e6d7e23ec785140cc988eb4062a2e21cd8893afd33112c839c8cd2e003224ba8246a47afb17b99040780c738f5342e28ad61776e83f7816

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

Filesize
186KB

MD5
ab161491c05bb4e14c9956bd90dec42f

SHA1
4f3fa749a5ab5aa69fb762c4f438f2759abf2c31

SHA256
8dd48cd023c9f13b6b41274c1b6d3be2907dbd929dda7701972b73a029df74b5

SHA512
530bcb714475e55a8e6d7e23ec785140cc988eb4062a2e21cd8893afd33112c839c8cd2e003224ba8246a47afb17b99040780c738f5342e28ad61776e83f7816

Download Submit
memory/2388-153-0x00000000057B0000-0x00000000057C0000-memory.dmp

Filesize
64KB

Download
memory/2388-152-0x0000000074E70000-0x0000000075620000-memory.dmp

Filesize
7.7MB

Download
memory/2388-159-0x0000000074E70000-0x0000000075620000-memory.dmp

Filesize
7.7MB

Download
memory/3596-162-0x0000000004DE0000-0x0000000004DF0000-memory.dmp

Filesize
64KB

Download
memory/3596-161-0x0000000074E70000-0x0000000075620000-memory.dmp

Filesize
7.7MB

Download
memory/3596-160-0x0000000004DE0000-0x0000000004DF0000-memory.dmp

Filesize
64KB

Download
memory/3596-158-0x0000000074E70000-0x0000000075620000-memory.dmp

Filesize
7.7MB

Download
memory/4452-133-0x0000000000D30000-0x0000000000D66000-memory.dmp

Filesize
216KB

Download
memory/4452-136-0x0000000005930000-0x00000000059CC000-memory.dmp

Filesize
624KB

Download
memory/4452-140-0x0000000074E80000-0x0000000075630000-memory.dmp

Filesize
7.7MB

Download
memory/4452-135-0x0000000005880000-0x0000000005890000-memory.dmp

Filesize
64KB

Download
memory/4452-134-0x0000000074E80000-0x0000000075630000-memory.dmp

Filesize
7.7MB

Download
memory/4556-137-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4556-141-0x0000000074E80000-0x0000000075630000-memory.dmp

Filesize
7.7MB

Download
memory/4556-147-0x0000000074E80000-0x0000000075630000-memory.dmp

Filesize
7.7MB

Download
memory/4556-143-0x0000000002910000-0x0000000002976000-memory.dmp

Filesize
408KB

Download
memory/4556-142-0x0000000004F40000-0x0000000004F50000-memory.dmp

Filesize
64KB

Download