asyncrat | 1660e0ec19de33e8fc633f7f8538b0b19f05765ecdacc63f2e43bdc4c716096e

Analysis

max time kernel
144s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
27-04-2022 02:46

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

more.exe
Size

299KB
MD5

8594d64e02a9dd1fb5ab412e246fe599
SHA1

d63784f4e964151b3b4e41bb5ed0c6597b56762f
SHA256

1660e0ec19de33e8fc633f7f8538b0b19f05765ecdacc63f2e43bdc4c716096e
SHA512

852f91245dce8ac5115feae6fc0a963b72810468f35d483497076e5a811c89eebd754673d7c48be78b77f6ac7bed3cfe6dba00666894dc3b5f3b15bf5ef2c36e

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

91.193.75.132:9191

Mutex

AsyncMutex_6SI8OkPnk

Attributes

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

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/4108-140-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Executes dropped EXE 2 IoCs

Processes:

images.exeimages.exe

pid process

1144 images.exe
3864 images.exe

pid	process
1144	images.exe
3864	images.exe

Checks computer location settings 2 TTPs 3 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

more.exemore.exeimages.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	more.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	more.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	images.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

more.exeimages.exe

description	pid	process	target process
PID 4788 set thread context of 4108	4788	more.exe	more.exe
PID 1144 set thread context of 3864	1144	images.exe	images.exe

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

Scheduled Task
T1053

Processes:

schtasks.exeschtasks.exeschtasks.exe

pid process

3540 schtasks.exe
1288 schtasks.exe
3180 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

812 timeout.exe

pid	process
3540	schtasks.exe
1288	schtasks.exe
3180	schtasks.exe

pid	process
812	timeout.exe

Suspicious behavior: EnumeratesProcesses 27 IoCs

Processes:

powershell.exemore.exepowershell.exe

pid	process
4608	powershell.exe
4608	powershell.exe
4108	more.exe
4108	more.exe
4108	more.exe
4108	more.exe
4108	more.exe
4108	more.exe
4108	more.exe
4108	more.exe
4108	more.exe
4108	more.exe
4108	more.exe
4108	more.exe
4108	more.exe
4108	more.exe
4108	more.exe
4108	more.exe
4108	more.exe
4108	more.exe
4108	more.exe
4108	more.exe
4108	more.exe
4108	more.exe
4108	more.exe
1872	powershell.exe
1872	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

powershell.exemore.exepowershell.exeimages.exe

description	pid	process
Token: SeDebugPrivilege	4608	powershell.exe
Token: SeDebugPrivilege	4108	more.exe
Token: SeDebugPrivilege	1872	powershell.exe
Token: SeDebugPrivilege	3864	images.exe

Suspicious use of WriteProcessMemory 43 IoCs

Processes:

more.exemore.execmd.execmd.exeimages.exe

description	pid	process	target process
PID 4788 wrote to memory of 4608	4788	more.exe	powershell.exe
PID 4788 wrote to memory of 4608	4788	more.exe	powershell.exe
PID 4788 wrote to memory of 4608	4788	more.exe	powershell.exe
PID 4788 wrote to memory of 3540	4788	more.exe	schtasks.exe
PID 4788 wrote to memory of 3540	4788	more.exe	schtasks.exe
PID 4788 wrote to memory of 3540	4788	more.exe	schtasks.exe
PID 4788 wrote to memory of 4108	4788	more.exe	more.exe
PID 4788 wrote to memory of 4108	4788	more.exe	more.exe
PID 4788 wrote to memory of 4108	4788	more.exe	more.exe
PID 4788 wrote to memory of 4108	4788	more.exe	more.exe
PID 4788 wrote to memory of 4108	4788	more.exe	more.exe
PID 4788 wrote to memory of 4108	4788	more.exe	more.exe
PID 4788 wrote to memory of 4108	4788	more.exe	more.exe
PID 4788 wrote to memory of 4108	4788	more.exe	more.exe
PID 4108 wrote to memory of 3004	4108	more.exe	cmd.exe
PID 4108 wrote to memory of 3004	4108	more.exe	cmd.exe
PID 4108 wrote to memory of 3004	4108	more.exe	cmd.exe
PID 4108 wrote to memory of 2396	4108	more.exe	cmd.exe
PID 4108 wrote to memory of 2396	4108	more.exe	cmd.exe
PID 4108 wrote to memory of 2396	4108	more.exe	cmd.exe
PID 3004 wrote to memory of 1288	3004	cmd.exe	schtasks.exe
PID 3004 wrote to memory of 1288	3004	cmd.exe	schtasks.exe
PID 3004 wrote to memory of 1288	3004	cmd.exe	schtasks.exe
PID 2396 wrote to memory of 812	2396	cmd.exe	timeout.exe
PID 2396 wrote to memory of 812	2396	cmd.exe	timeout.exe
PID 2396 wrote to memory of 812	2396	cmd.exe	timeout.exe
PID 2396 wrote to memory of 1144	2396	cmd.exe	images.exe
PID 2396 wrote to memory of 1144	2396	cmd.exe	images.exe
PID 2396 wrote to memory of 1144	2396	cmd.exe	images.exe
PID 1144 wrote to memory of 1872	1144	images.exe	powershell.exe
PID 1144 wrote to memory of 1872	1144	images.exe	powershell.exe
PID 1144 wrote to memory of 1872	1144	images.exe	powershell.exe
PID 1144 wrote to memory of 3180	1144	images.exe	schtasks.exe
PID 1144 wrote to memory of 3180	1144	images.exe	schtasks.exe
PID 1144 wrote to memory of 3180	1144	images.exe	schtasks.exe
PID 1144 wrote to memory of 3864	1144	images.exe	images.exe
PID 1144 wrote to memory of 3864	1144	images.exe	images.exe
PID 1144 wrote to memory of 3864	1144	images.exe	images.exe
PID 1144 wrote to memory of 3864	1144	images.exe	images.exe
PID 1144 wrote to memory of 3864	1144	images.exe	images.exe
PID 1144 wrote to memory of 3864	1144	images.exe	images.exe
PID 1144 wrote to memory of 3864	1144	images.exe	images.exe
PID 1144 wrote to memory of 3864	1144	images.exe	images.exe

C:\Users\Admin\AppData\Local\Temp\more.exe
"C:\Users\Admin\AppData\Local\Temp\more.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4788
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\UiKVWpFsayx.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4608
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\UiKVWpFsayx" /XML "C:\Users\Admin\AppData\Local\Temp\tmpDDB.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:3540
- C:\Users\Admin\AppData\Local\Temp\more.exe
  "C:\Users\Admin\AppData\Local\Temp\more.exe"
  2⤵
  - Checks computer location settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4108
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "images" /tr '"C:\Users\Admin\AppData\Roaming\images.exe"' & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3004
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "images" /tr '"C:\Users\Admin\AppData\Roaming\images.exe"'
      4⤵
      Creates scheduled task(s)
      PID:1288
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp2309.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2396
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:812
  - - C:\Users\Admin\AppData\Roaming\images.exe
      "C:\Users\Admin\AppData\Roaming\images.exe"
      4⤵
      Executes dropped EXE
      Checks computer location settings
      Suspicious use of SetThreadContext
      Suspicious use of WriteProcessMemory
      PID:1144
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\UiKVWpFsayx.exe"
        5⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1872
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\UiKVWpFsayx" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC459.tmp"
        5⤵
        Creates scheduled task(s)
        
        PID:3180
    - - C:\Users\Admin\AppData\Roaming\images.exe
        
        "C:\Users\Admin\AppData\Roaming\images.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:3864

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
1KB

MD5
8ec831f3e3a3f77e4a7b9cd32b48384c

SHA1
d83f09fd87c5bd86e045873c231c14836e76a05c

SHA256
7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

SHA512
26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

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

Filesize
1KB

MD5
8ec831f3e3a3f77e4a7b9cd32b48384c

SHA1
d83f09fd87c5bd86e045873c231c14836e76a05c

SHA256
7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

SHA512
26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

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

Filesize
2KB

MD5
968cb9309758126772781b83adb8a28f

SHA1
8da30e71accf186b2ba11da1797cf67f8f78b47c

SHA256
92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

SHA512
4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
18KB

MD5
36e4042ea87599ceac985654df2f46f2

SHA1
55cc02f7bc23958325424bf0bf9481225a2b96bf

SHA256
eb645bbb69e7480831e60e39a93ebbd5cb24e0fdccd3c87a5de5f8376d2b7b5a

SHA512
90d6d4da17c533d42c24dde3e6e05ccb3047690bc3aeb114fde3f97063acb3db816a5384f9203650e68917b366d48b22fddb7da3ad8c39dd4eecef05799b0bf7

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp2309.tmp.bat

Filesize
150B

MD5
2120a315982fdce8ec3d49af22c492f0

SHA1
42595ff4b10469786efcdc2062ef0e0d993d54d2

SHA256
f4d580d20e27853f4590943114c4936e178f051d5408253fcff222b3ebef4f06

SHA512
95d9e73e78618006b69d21b15636a08d29acdd49b3367d90fb33594d65ba5b3f02f009f0ffed6a8390f22d434badad5577d04a2a6d5ab1cddcdb98e7fc1b6a11

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpC459.tmp

Filesize
1KB

MD5
eeffa4131f730e9f9a80d1e0d365cedc

SHA1
47984a561e428409612001911451601a0cd6212f

SHA256
00a640af7c383871bf3fa39ec0d89f312ac7236522b41dea3257af02975bb339

SHA512
4bfd478243a0f4d4e9842895fc477febf27cd7ce604f21710aa63235b26f283905aad454acfa15c480e20909d11f7e9c603602f7b3dcf7206f23fce220d686b3

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

Filesize
1KB

MD5
eeffa4131f730e9f9a80d1e0d365cedc

SHA1
47984a561e428409612001911451601a0cd6212f

SHA256
00a640af7c383871bf3fa39ec0d89f312ac7236522b41dea3257af02975bb339

SHA512
4bfd478243a0f4d4e9842895fc477febf27cd7ce604f21710aa63235b26f283905aad454acfa15c480e20909d11f7e9c603602f7b3dcf7206f23fce220d686b3

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

Filesize
299KB

MD5
8594d64e02a9dd1fb5ab412e246fe599

SHA1
d63784f4e964151b3b4e41bb5ed0c6597b56762f

SHA256
1660e0ec19de33e8fc633f7f8538b0b19f05765ecdacc63f2e43bdc4c716096e

SHA512
852f91245dce8ac5115feae6fc0a963b72810468f35d483497076e5a811c89eebd754673d7c48be78b77f6ac7bed3cfe6dba00666894dc3b5f3b15bf5ef2c36e

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

Filesize
299KB

MD5
8594d64e02a9dd1fb5ab412e246fe599

SHA1
d63784f4e964151b3b4e41bb5ed0c6597b56762f

SHA256
1660e0ec19de33e8fc633f7f8538b0b19f05765ecdacc63f2e43bdc4c716096e

SHA512
852f91245dce8ac5115feae6fc0a963b72810468f35d483497076e5a811c89eebd754673d7c48be78b77f6ac7bed3cfe6dba00666894dc3b5f3b15bf5ef2c36e

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

Filesize
299KB

MD5
8594d64e02a9dd1fb5ab412e246fe599

SHA1
d63784f4e964151b3b4e41bb5ed0c6597b56762f

SHA256
1660e0ec19de33e8fc633f7f8538b0b19f05765ecdacc63f2e43bdc4c716096e

SHA512
852f91245dce8ac5115feae6fc0a963b72810468f35d483497076e5a811c89eebd754673d7c48be78b77f6ac7bed3cfe6dba00666894dc3b5f3b15bf5ef2c36e

Download Submit
memory/812-158-0x0000000000000000-mapping.dmp

Download
memory/1144-162-0x0000000000000000-mapping.dmp

Download
memory/1288-157-0x0000000000000000-mapping.dmp

Download
memory/1872-174-0x0000000071140000-0x000000007118C000-memory.dmp

Filesize
304KB

Download
memory/1872-165-0x0000000000000000-mapping.dmp

Download
memory/2396-155-0x0000000000000000-mapping.dmp

Download
memory/3004-154-0x0000000000000000-mapping.dmp

Download
memory/3180-166-0x0000000000000000-mapping.dmp

Download
memory/3540-136-0x0000000000000000-mapping.dmp

Download
memory/3864-169-0x0000000000000000-mapping.dmp

Download
memory/4108-140-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4108-139-0x0000000000000000-mapping.dmp

Download
memory/4608-147-0x0000000006CB0000-0x0000000006CE2000-memory.dmp

Filesize
200KB

Download
memory/4608-161-0x0000000007D10000-0x0000000007D18000-memory.dmp

Filesize
32KB

Download
memory/4608-152-0x0000000007A50000-0x0000000007A5A000-memory.dmp

Filesize
40KB

Download
memory/4608-151-0x00000000079F0000-0x0000000007A0A000-memory.dmp

Filesize
104KB

Download
memory/4608-135-0x0000000000000000-mapping.dmp

Download
memory/4608-150-0x0000000008070000-0x00000000086EA000-memory.dmp

Filesize
6.5MB

Download
memory/4608-149-0x0000000006C90000-0x0000000006CAE000-memory.dmp

Filesize
120KB

Download
memory/4608-159-0x0000000007C20000-0x0000000007C2E000-memory.dmp

Filesize
56KB

Download
memory/4608-160-0x0000000007D30000-0x0000000007D4A000-memory.dmp

Filesize
104KB

Download
memory/4608-144-0x0000000005F40000-0x0000000005FA6000-memory.dmp

Filesize
408KB

Download
memory/4608-148-0x0000000071140000-0x000000007118C000-memory.dmp

Filesize
304KB

Download
memory/4608-153-0x0000000007C60000-0x0000000007CF6000-memory.dmp

Filesize
600KB

Download
memory/4608-137-0x0000000005140000-0x0000000005176000-memory.dmp

Filesize
216KB

Download
memory/4608-146-0x00000000066F0000-0x000000000670E000-memory.dmp

Filesize
120KB

Download
memory/4608-145-0x00000000060A0000-0x0000000006106000-memory.dmp

Filesize
408KB

Download
memory/4608-142-0x00000000058A0000-0x0000000005EC8000-memory.dmp

Filesize
6.2MB

Download
memory/4608-143-0x0000000005730000-0x0000000005752000-memory.dmp

Filesize
136KB

Download
memory/4788-130-0x0000000000010000-0x0000000000062000-memory.dmp

Filesize
328KB

Download
memory/4788-133-0x0000000004BC0000-0x0000000004BCA000-memory.dmp

Filesize
40KB

Download
memory/4788-132-0x0000000004A10000-0x0000000004AA2000-memory.dmp

Filesize
584KB

Download
memory/4788-131-0x0000000004F10000-0x00000000054B4000-memory.dmp

Filesize
5.6MB

Download
memory/4788-134-0x00000000071D0000-0x000000000726C000-memory.dmp

Filesize
624KB

Download