asyncrat | e8c888ad87c5b9e62670edca84a5fa468cd92ad1137beb727cfb42e8b327d03c

Analysis

max time kernel
144s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
01-07-2024 03:43

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General

Target

20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe
Size

897KB
MD5

db6bf30fd61d330a5466459124fd4f21
SHA1

5beef951cc1052daeca87d5ef69999b3d0cc1381
SHA256

20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe
SHA512

f794a8ed161e23951299890660fd98f42cd0159aca9d6f653263170b0c63ab8b6a4ba2101f13862541440b01517da2c6348a26f1a1cec470878abe4b796474dd
SSDEEP

24576:KMPzX5QdJTGSQfTWJcWF2dZ7T8IY3Sd+L0S6D9:KMLqXTGSjcQmZ7QIcSEmD

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.6D

Botnet

Default

seznam.zapto.org:6606

seznam.zapto.org:7707

seznam.zapto.org:8808

Mutex

zaqhepdivuiitce

Attributes

delay
5
install
true
install_file
sezznam.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

Processes:

resource yara_rule

behavioral2/memory/2148-4-0x0000000002DB0000-0x0000000002DC2000-memory.dmp family_asyncrat

resource	yara_rule
behavioral2/memory/2148-4-0x0000000002DB0000-0x0000000002DC2000-memory.dmp	family_asyncrat

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe

Executes dropped EXE 1 IoCs

Processes:

sezznam.exe

pid process

2384 sezznam.exe
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
evasion

Processes:

timeout.exe

pid process

3964 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

Processes:

schtasks.exe

pid process

1000 schtasks.exe

pid	process
2384	sezznam.exe

pid	process
3964	timeout.exe

pid	process
1000	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

Processes:

20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe

pid	process
2148	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe
2148	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe
2148	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe
2148	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe
2148	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe
2148	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe
2148	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe
2148	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe
2148	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe
2148	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe
2148	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe
2148	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe
2148	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe
2148	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe
2148	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe
2148	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe
2148	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe
2148	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe
2148	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe
2148	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe
2148	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exesezznam.exe

description pid process

Token: SeDebugPrivilege 2148 20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe
Token: SeDebugPrivilege 2384 sezznam.exe

description	pid	process
Token: SeDebugPrivilege	2148	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe
Token: SeDebugPrivilege	2384	sezznam.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.execmd.execmd.exe

description	pid	process	target process
PID 2148 wrote to memory of 1968	2148	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe	cmd.exe
PID 2148 wrote to memory of 1968	2148	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe	cmd.exe
PID 2148 wrote to memory of 1968	2148	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe	cmd.exe
PID 2148 wrote to memory of 4352	2148	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe	cmd.exe
PID 2148 wrote to memory of 4352	2148	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe	cmd.exe
PID 2148 wrote to memory of 4352	2148	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe	cmd.exe
PID 1968 wrote to memory of 1000	1968	cmd.exe	schtasks.exe
PID 1968 wrote to memory of 1000	1968	cmd.exe	schtasks.exe
PID 1968 wrote to memory of 1000	1968	cmd.exe	schtasks.exe
PID 4352 wrote to memory of 3964	4352	cmd.exe	timeout.exe
PID 4352 wrote to memory of 3964	4352	cmd.exe	timeout.exe
PID 4352 wrote to memory of 3964	4352	cmd.exe	timeout.exe
PID 4352 wrote to memory of 2384	4352	cmd.exe	sezznam.exe
PID 4352 wrote to memory of 2384	4352	cmd.exe	sezznam.exe
PID 4352 wrote to memory of 2384	4352	cmd.exe	sezznam.exe

C:\Users\Admin\AppData\Local\Temp\20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe
"C:\Users\Admin\AppData\Local\Temp\20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2148

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /ru system /rl highest /tn 20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe /tr '"C:\Users\Admin\AppData\Roaming\sezznam.exe"' & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:1968

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /ru system /rl highest /tn 20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe /tr '"C:\Users\Admin\AppData\Roaming\sezznam.exe"'
3⤵
- Scheduled Task/Job: Scheduled Task
PID:1000

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp59E7.tmp.bat""
2⤵
- Suspicious use of WriteProcessMemory
PID:4352

C:\Windows\SysWOW64\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:3964

C:\Users\Admin\AppData\Roaming\sezznam.exe
"C:\Users\Admin\AppData\Roaming\sezznam.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2384

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp59E7.tmp.bat
Filesize
151B

MD5
0e4262616549e48b70aa82aeeea79c99

SHA1
6a6aa9a6e8ee3dc8ed05a8658432d64fd5642c84

SHA256
b88167dda687578e2b24c423f62aadb6ea8de72e9eb39b131a9271275b9861f3

SHA512
650e4df9becfc44c73a4f96f4e67a2e1c71e0527bde2aaa247d8c3913b6106ada9cc37efb8cb2387f5b228433e30348ea73c55215a0405998bdb0ab319331963

Download Submit
C:\Users\Admin\AppData\Roaming\sezznam.exe
Filesize
897KB

MD5
db6bf30fd61d330a5466459124fd4f21

SHA1
5beef951cc1052daeca87d5ef69999b3d0cc1381

SHA256
20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe

SHA512
f794a8ed161e23951299890660fd98f42cd0159aca9d6f653263170b0c63ab8b6a4ba2101f13862541440b01517da2c6348a26f1a1cec470878abe4b796474dd

Download Submit
memory/2148-3-0x00000000053E0000-0x0000000005472000-memory.dmp

Filesize
584KB

Download
memory/2148-0-0x0000000074CBE000-0x0000000074CBF000-memory.dmp

Filesize
4KB

Download
memory/2148-4-0x0000000002DB0000-0x0000000002DC2000-memory.dmp

Filesize
72KB

Download
memory/2148-5-0x0000000005510000-0x00000000055AC000-memory.dmp

Filesize
624KB

Download
memory/2148-6-0x0000000074CB0000-0x0000000075460000-memory.dmp

Filesize
7.7MB

Download
memory/2148-11-0x0000000074CB0000-0x0000000075460000-memory.dmp

Filesize
7.7MB

Download
memory/2148-2-0x0000000005AC0000-0x0000000006064000-memory.dmp

Filesize
5.6MB

Download
memory/2148-1-0x00000000008D0000-0x00000000009B6000-memory.dmp

Filesize
920KB

Download
memory/2384-16-0x0000000074CB0000-0x0000000075460000-memory.dmp

Filesize
7.7MB

Download
memory/2384-17-0x0000000074CB0000-0x0000000075460000-memory.dmp

Filesize
7.7MB

Download
memory/2384-18-0x0000000074CB0000-0x0000000075460000-memory.dmp

Filesize
7.7MB

Download