asyncrat | fe0f056142303bda8538355d81aced08b4792c9787c6060ccad08442e0dacad0

General

Target

winjs.exe
Size

52KB
MD5

623a97bc746f3b530b9f2cb2df7e9145
SHA1

1c03bf8e9db2120a1473c9c6924059e75639fa1c
SHA256

fe0f056142303bda8538355d81aced08b4792c9787c6060ccad08442e0dacad0
SHA512

c0b89b096704a2727bf0242b2d20ed563980e51c4535cac98a9a34d84e89289bda87e3763bedb615f04f72d18a502f48b8ad5276c9e8dc4d1373e1a0bd47ff52
SSDEEP

768:YoGDMmILyCe++bidiEuiso8Ybwge9V2COvEgK/Jn2i++++tyVc6KN:Yo0MWSMEzb3mOnkJLyVclN

Score

10^/10

asyncrat powershell rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

PowerShell

Mutex

DCSSZZVV

Attributes

delay
1
install
true
install_file
winws.exe
install_folder
%AppData%
pastebin_config
https://pastebin.com/raw/cn4rM5C9

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/0x000a00000001225f-14.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2716	winws.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 28 IoCs

Web Service

T1102

flow	ioc
8	pastebin.com
17	pastebin.com
20	pastebin.com
22	pastebin.com
28	pastebin.com
19	pastebin.com
23	pastebin.com
29	pastebin.com
30	pastebin.com
31	pastebin.com
7	pastebin.com
5	pastebin.com
16	pastebin.com
21	pastebin.com
24	pastebin.com
27	pastebin.com
4	pastebin.com
6	pastebin.com
10	pastebin.com
14	pastebin.com
15	pastebin.com
25	pastebin.com
9	pastebin.com
11	pastebin.com
13	pastebin.com
18	pastebin.com
12	pastebin.com
26	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

defense_evasion

pid	Process
2348	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
2624	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2760	winjs.exe
2760	winjs.exe
2760	winjs.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2760	winjs.exe
Token: SeDebugPrivilege	2760	winjs.exe
Token: SeDebugPrivilege	2716	winws.exe
Token: SeDebugPrivilege	2716	winws.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2760 wrote to memory of 2904	2760	winjs.exe	31
PID 2760 wrote to memory of 2904	2760	winjs.exe	31
PID 2760 wrote to memory of 2904	2760	winjs.exe	31
PID 2760 wrote to memory of 2720	2760	winjs.exe	33
PID 2760 wrote to memory of 2720	2760	winjs.exe	33
PID 2760 wrote to memory of 2720	2760	winjs.exe	33
PID 2904 wrote to memory of 2624	2904	cmd.exe	35
PID 2904 wrote to memory of 2624	2904	cmd.exe	35
PID 2904 wrote to memory of 2624	2904	cmd.exe	35
PID 2720 wrote to memory of 2348	2720	cmd.exe	36
PID 2720 wrote to memory of 2348	2720	cmd.exe	36
PID 2720 wrote to memory of 2348	2720	cmd.exe	36
PID 2720 wrote to memory of 2716	2720	cmd.exe	37
PID 2720 wrote to memory of 2716	2720	cmd.exe	37
PID 2720 wrote to memory of 2716	2720	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\winjs.exe
"C:\Users\Admin\AppData\Local\Temp\winjs.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2760
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "winws" /tr '"C:\Users\Admin\AppData\Roaming\winws.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2904
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "winws" /tr '"C:\Users\Admin\AppData\Roaming\winws.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2624
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpF3D1.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2720
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2348
- - C:\Users\Admin\AppData\Roaming\winws.exe
    "C:\Users\Admin\AppData\Roaming\winws.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2716

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\tmpF3D1.tmp.bat

Filesize
149B

MD5
f97e4684763609fc138010881e581113

SHA1
2eb1ebfe6ac9dda25408cbafbf71e25974462e0c

SHA256
82204e676fb4052c46fc5d26721ddb4a16ff36c6c5e8b11b1970face6b99b1ab

SHA512
b1a0d651e8c95dd65656464218968a7b1aeb51f0a7884fc46a22bb46c7f3836966fe4450b5491bc3bcd9c8c55381cb4f2fda70f41bf897762b668c54b44c1243

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

Filesize
52KB

MD5
623a97bc746f3b530b9f2cb2df7e9145

SHA1
1c03bf8e9db2120a1473c9c6924059e75639fa1c

SHA256
fe0f056142303bda8538355d81aced08b4792c9787c6060ccad08442e0dacad0

SHA512
c0b89b096704a2727bf0242b2d20ed563980e51c4535cac98a9a34d84e89289bda87e3763bedb615f04f72d18a502f48b8ad5276c9e8dc4d1373e1a0bd47ff52

Download Submit
memory/2716-16-0x0000000000FD0000-0x0000000000FE4000-memory.dmp

Filesize
80KB

Download
memory/2760-0-0x000007FEF5823000-0x000007FEF5824000-memory.dmp

Filesize
4KB

Download
memory/2760-1-0x00000000008E0000-0x00000000008F4000-memory.dmp

Filesize
80KB

Download
memory/2760-2-0x000007FEF5820000-0x000007FEF620C000-memory.dmp

Filesize
9.9MB

Download
memory/2760-12-0x000007FEF5820000-0x000007FEF620C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads