asyncrat | 6815ff5dc021df4556f774108073648ca9191f7634c9fca94707d54ef686ee38

General

Target

6815ff5dc021df4556f774108073648ca9191f7634c9fca94707d54ef686ee38.exe
Size

195KB
MD5

66a167b944c4ea45a207f551e2c9fc28
SHA1

88703c2bf165899ec004dab9f5f273c46a8d286c
SHA256

6815ff5dc021df4556f774108073648ca9191f7634c9fca94707d54ef686ee38
SHA512

89d647f0593518fa63976e168588c41bacd91bd6be59550e535a27ca7d817f29705830ce5ad3810a76096934d66216afb3f4f670309c102f1f4c496027969370
SSDEEP

1536:hu0Fi41HYlZuIyPGSRfxp6kghBtdhv/oOK5XjJwkA1MmnQTNSbgjxAAnieghr4Dq:huTnaYfshPPD74Jo50093FFd7GEawuJ

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

ValentinMihai-48225.portmap.io:48225=>7119:48225

ValentinMihai-48225.portmap.io:48225=>7119:7119

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
Windows Defender SmartScreen.exe
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 7 IoCs

rat

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\build.exe	asyncrat
C:\Users\Admin\AppData\Local\build.exe	asyncrat
behavioral1/memory/876-58-0x0000000000B90000-0x0000000000BA2000-memory.dmp	asyncrat
\Users\Admin\AppData\Roaming\Windows Defender SmartScreen.exe	asyncrat
C:\Users\Admin\AppData\Roaming\Windows Defender SmartScreen.exe	asyncrat
C:\Users\Admin\AppData\Roaming\Windows Defender SmartScreen.exe	asyncrat
behavioral1/memory/1632-69-0x0000000001330000-0x0000000001342000-memory.dmp	asyncrat

Executes dropped EXE 2 IoCs

Processes:

build.exeWindows Defender SmartScreen.exe

pid process

876 build.exe
1632 Windows Defender SmartScreen.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

1172 cmd.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 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

1652 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

1640 timeout.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

build.exe

pid process

876 build.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

build.exeWindows Defender SmartScreen.exe

description pid process

Token: SeDebugPrivilege 876 build.exe
Token: SeDebugPrivilege 1632 Windows Defender SmartScreen.exe

pid	process
876	build.exe
1632	Windows Defender SmartScreen.exe

pid	process
1172	cmd.exe

pid	process
1652	schtasks.exe

pid	process
1640	timeout.exe

pid	process
876	build.exe

description	pid	process
Token: SeDebugPrivilege	876	build.exe
Token: SeDebugPrivilege	1632	Windows Defender SmartScreen.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

6815ff5dc021df4556f774108073648ca9191f7634c9fca94707d54ef686ee38.exebuild.execmd.execmd.exe

description	pid	process	target process
PID 956 wrote to memory of 876	956	6815ff5dc021df4556f774108073648ca9191f7634c9fca94707d54ef686ee38.exe	build.exe
PID 956 wrote to memory of 876	956	6815ff5dc021df4556f774108073648ca9191f7634c9fca94707d54ef686ee38.exe	build.exe
PID 956 wrote to memory of 876	956	6815ff5dc021df4556f774108073648ca9191f7634c9fca94707d54ef686ee38.exe	build.exe
PID 956 wrote to memory of 876	956	6815ff5dc021df4556f774108073648ca9191f7634c9fca94707d54ef686ee38.exe	build.exe
PID 876 wrote to memory of 1940	876	build.exe	cmd.exe
PID 876 wrote to memory of 1940	876	build.exe	cmd.exe
PID 876 wrote to memory of 1940	876	build.exe	cmd.exe
PID 876 wrote to memory of 1940	876	build.exe	cmd.exe
PID 876 wrote to memory of 1172	876	build.exe	cmd.exe
PID 876 wrote to memory of 1172	876	build.exe	cmd.exe
PID 876 wrote to memory of 1172	876	build.exe	cmd.exe
PID 876 wrote to memory of 1172	876	build.exe	cmd.exe
PID 1172 wrote to memory of 1640	1172	cmd.exe	timeout.exe
PID 1172 wrote to memory of 1640	1172	cmd.exe	timeout.exe
PID 1172 wrote to memory of 1640	1172	cmd.exe	timeout.exe
PID 1172 wrote to memory of 1640	1172	cmd.exe	timeout.exe
PID 1940 wrote to memory of 1652	1940	cmd.exe	schtasks.exe
PID 1940 wrote to memory of 1652	1940	cmd.exe	schtasks.exe
PID 1940 wrote to memory of 1652	1940	cmd.exe	schtasks.exe
PID 1940 wrote to memory of 1652	1940	cmd.exe	schtasks.exe
PID 1172 wrote to memory of 1632	1172	cmd.exe	Windows Defender SmartScreen.exe
PID 1172 wrote to memory of 1632	1172	cmd.exe	Windows Defender SmartScreen.exe
PID 1172 wrote to memory of 1632	1172	cmd.exe	Windows Defender SmartScreen.exe
PID 1172 wrote to memory of 1632	1172	cmd.exe	Windows Defender SmartScreen.exe

C:\Users\Admin\AppData\Local\Temp\6815ff5dc021df4556f774108073648ca9191f7634c9fca94707d54ef686ee38.exe
"C:\Users\Admin\AppData\Local\Temp\6815ff5dc021df4556f774108073648ca9191f7634c9fca94707d54ef686ee38.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:956

C:\Users\Admin\AppData\Local\build.exe
"C:\Users\Admin\AppData\Local\build.exe"
2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:876

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Windows Defender SmartScreen" /tr '"C:\Users\Admin\AppData\Roaming\Windows Defender SmartScreen.exe"' & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:1940

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "Windows Defender SmartScreen" /tr '"C:\Users\Admin\AppData\Roaming\Windows Defender SmartScreen.exe"'
4⤵
- Creates scheduled task(s)
PID:1652

C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp80A5.tmp.bat""
3⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1172

C:\Windows\SysWOW64\timeout.exe
timeout 3
4⤵
- Delays execution with timeout.exe
PID:1640

C:\Users\Admin\AppData\Roaming\Windows Defender SmartScreen.exe
"C:\Users\Admin\AppData\Roaming\Windows Defender SmartScreen.exe"
4⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1632

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp80A5.tmp.bat
Filesize
172B

MD5
d2c5de9c0aaa4fd55b4ebc0626cfa6b5

SHA1
bbc7c9ce3bd9e1b2299595d31ba570afb6717bbb

SHA256
54ad0ad5590508bfe7c51723427422ec9196dc3a7542ecc02f16e1d45a30bcdf

SHA512
18a0be4bb5f14b9700236de7c22661e03f7e7e8748af31c7ebb107f53f9e8e11224e3dc05beefec42c80bdf929338870b354adefd671baebf1b8327432d5926d

Download Submit
C:\Users\Admin\AppData\Local\build.exe
Filesize
47KB

MD5
20f0a4c172d05e4c9409dfe2dd8f773f

SHA1
39af4d0c658263df11c6b9951fa5336b1bedd817

SHA256
2dcecfb77772e8dc0b56d6421aa0f782fabe4d1730f29880bfd3edfee98bdc5f

SHA512
406dcc9775a66db15e99ea9db277ccdbc15b6f86e09ce0e0ac45cdbb2218ee2440117430574c1aed5c42b28d47a8a997d27221b5e0c1021b722f826858fb43f8

Download Submit
C:\Users\Admin\AppData\Local\build.exe
Filesize
47KB

MD5
20f0a4c172d05e4c9409dfe2dd8f773f

SHA1
39af4d0c658263df11c6b9951fa5336b1bedd817

SHA256
2dcecfb77772e8dc0b56d6421aa0f782fabe4d1730f29880bfd3edfee98bdc5f

SHA512
406dcc9775a66db15e99ea9db277ccdbc15b6f86e09ce0e0ac45cdbb2218ee2440117430574c1aed5c42b28d47a8a997d27221b5e0c1021b722f826858fb43f8

Download Submit
C:\Users\Admin\AppData\Roaming\Windows Defender SmartScreen.exe
Filesize
47KB

MD5
20f0a4c172d05e4c9409dfe2dd8f773f

SHA1
39af4d0c658263df11c6b9951fa5336b1bedd817

SHA256
2dcecfb77772e8dc0b56d6421aa0f782fabe4d1730f29880bfd3edfee98bdc5f

SHA512
406dcc9775a66db15e99ea9db277ccdbc15b6f86e09ce0e0ac45cdbb2218ee2440117430574c1aed5c42b28d47a8a997d27221b5e0c1021b722f826858fb43f8

Download Submit
C:\Users\Admin\AppData\Roaming\Windows Defender SmartScreen.exe
Filesize
47KB

MD5
20f0a4c172d05e4c9409dfe2dd8f773f

SHA1
39af4d0c658263df11c6b9951fa5336b1bedd817

SHA256
2dcecfb77772e8dc0b56d6421aa0f782fabe4d1730f29880bfd3edfee98bdc5f

SHA512
406dcc9775a66db15e99ea9db277ccdbc15b6f86e09ce0e0ac45cdbb2218ee2440117430574c1aed5c42b28d47a8a997d27221b5e0c1021b722f826858fb43f8

Download Submit
\Users\Admin\AppData\Roaming\Windows Defender SmartScreen.exe
Filesize
47KB

MD5
20f0a4c172d05e4c9409dfe2dd8f773f

SHA1
39af4d0c658263df11c6b9951fa5336b1bedd817

SHA256
2dcecfb77772e8dc0b56d6421aa0f782fabe4d1730f29880bfd3edfee98bdc5f

SHA512
406dcc9775a66db15e99ea9db277ccdbc15b6f86e09ce0e0ac45cdbb2218ee2440117430574c1aed5c42b28d47a8a997d27221b5e0c1021b722f826858fb43f8

Download Submit
memory/876-58-0x0000000000B90000-0x0000000000BA2000-memory.dmp

Filesize
72KB

Download
memory/876-59-0x0000000075891000-0x0000000075893000-memory.dmp

Filesize
8KB

Download
memory/876-55-0x0000000000000000-mapping.dmp

Download
memory/956-54-0x0000000000110000-0x0000000000148000-memory.dmp

Filesize
224KB

Download
memory/1172-61-0x0000000000000000-mapping.dmp

Download
memory/1632-67-0x0000000000000000-mapping.dmp

Download
memory/1632-69-0x0000000001330000-0x0000000001342000-memory.dmp

Filesize
72KB

Download
memory/1640-63-0x0000000000000000-mapping.dmp

Download
memory/1652-64-0x0000000000000000-mapping.dmp

Download
memory/1940-60-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads