asyncrat | e8c888ad87c5b9e62670edca84a5fa468cd92ad1137beb727cfb42e8b327d03c

Analysis

max time kernel
121s
max time network
129s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-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 2 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/2140-2-0x00000000001F0000-0x0000000000202000-memory.dmp	family_asyncrat
behavioral1/memory/2492-18-0x0000000000330000-0x0000000000342000-memory.dmp	family_asyncrat

Executes dropped EXE 1 IoCs

Processes:

sezznam.exe

pid process

2492 sezznam.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

2448 cmd.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

2312 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

2284 schtasks.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe

pid process

2140 20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe
2140 20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exesezznam.exe

description pid process

Token: SeDebugPrivilege 2140 20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe
Token: SeDebugPrivilege 2492 sezznam.exe

pid	process
2492	sezznam.exe

pid	process
2448	cmd.exe

pid	process
2312	timeout.exe

pid	process
2284	schtasks.exe

pid	process
2140	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe
2140	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe

description	pid	process
Token: SeDebugPrivilege	2140	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe
Token: SeDebugPrivilege	2492	sezznam.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.execmd.execmd.exe

description	pid	process	target process
PID 2140 wrote to memory of 2128	2140	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe	cmd.exe
PID 2140 wrote to memory of 2128	2140	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe	cmd.exe
PID 2140 wrote to memory of 2128	2140	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe	cmd.exe
PID 2140 wrote to memory of 2128	2140	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe	cmd.exe
PID 2140 wrote to memory of 2448	2140	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe	cmd.exe
PID 2140 wrote to memory of 2448	2140	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe	cmd.exe
PID 2140 wrote to memory of 2448	2140	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe	cmd.exe
PID 2140 wrote to memory of 2448	2140	20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe	cmd.exe
PID 2128 wrote to memory of 2284	2128	cmd.exe	schtasks.exe
PID 2128 wrote to memory of 2284	2128	cmd.exe	schtasks.exe
PID 2128 wrote to memory of 2284	2128	cmd.exe	schtasks.exe
PID 2128 wrote to memory of 2284	2128	cmd.exe	schtasks.exe
PID 2448 wrote to memory of 2312	2448	cmd.exe	timeout.exe
PID 2448 wrote to memory of 2312	2448	cmd.exe	timeout.exe
PID 2448 wrote to memory of 2312	2448	cmd.exe	timeout.exe
PID 2448 wrote to memory of 2312	2448	cmd.exe	timeout.exe
PID 2448 wrote to memory of 2492	2448	cmd.exe	sezznam.exe
PID 2448 wrote to memory of 2492	2448	cmd.exe	sezznam.exe
PID 2448 wrote to memory of 2492	2448	cmd.exe	sezznam.exe
PID 2448 wrote to memory of 2492	2448	cmd.exe	sezznam.exe

C:\Users\Admin\AppData\Local\Temp\20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe
"C:\Users\Admin\AppData\Local\Temp\20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2140

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:2128

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:2284

C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp39F4.tmp.bat""
2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2448

C:\Windows\SysWOW64\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:2312

C:\Users\Admin\AppData\Roaming\sezznam.exe
"C:\Users\Admin\AppData\Roaming\sezznam.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2492

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp39F4.tmp.bat
Filesize
151B

MD5
ca067090c069529c2bca36597c21a826

SHA1
9239f48f307bb20e19a01cd3b2418aba0f48750a

SHA256
d3beda64ac2ad7b7411d4b6b0f6e7a156342e3045147f3dc73029e646853c6cf

SHA512
e72cd26cde8fc7f1b85dfc2df13913085238be371db2ec2285e196748028bd14bda7e3cc1821d367a06ab5cdc9cfe67fa1802ab1e7f228cccf0e1839b8c9bb60

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

MD5
db6bf30fd61d330a5466459124fd4f21

SHA1
5beef951cc1052daeca87d5ef69999b3d0cc1381

SHA256
20e3320ed125693938485c94c8ebf1a981ed2d717bba86f137a4b327757946fe

SHA512
f794a8ed161e23951299890660fd98f42cd0159aca9d6f653263170b0c63ab8b6a4ba2101f13862541440b01517da2c6348a26f1a1cec470878abe4b796474dd

Download Submit
memory/2140-0-0x0000000074C9E000-0x0000000074C9F000-memory.dmp

Filesize
4KB

Download
memory/2140-1-0x00000000003C0000-0x00000000004A6000-memory.dmp

Filesize
920KB

Download
memory/2140-2-0x00000000001F0000-0x0000000000202000-memory.dmp

Filesize
72KB

Download
memory/2140-3-0x0000000074C90000-0x000000007537E000-memory.dmp

Filesize
6.9MB

Download
memory/2140-13-0x0000000074C90000-0x000000007537E000-memory.dmp

Filesize
6.9MB

Download
memory/2492-17-0x0000000000390000-0x0000000000476000-memory.dmp

Filesize
920KB

Download
memory/2492-18-0x0000000000330000-0x0000000000342000-memory.dmp

Filesize
72KB

Download