asyncrat | 353120b1c48a0071140cbf448d6e1eb88ebaf80a1bd9b6b7e39da0eeaeac0965

General

Target

c81b9af6fd20ff231e4ec8ce366db0b0N.exe
Size

45KB
MD5

c81b9af6fd20ff231e4ec8ce366db0b0
SHA1

6342a91dd793055d6767259d2b7eaac753e90cf4
SHA256

353120b1c48a0071140cbf448d6e1eb88ebaf80a1bd9b6b7e39da0eeaeac0965
SHA512

92c289265d2c4af7608c4aac9065fbbeb63f473f517df4400c1ed74bc53ebce137d61504005344c80bd3c5a076fff4c7070a6e1b4b957036155505d5958cc61e
SSDEEP

768:uuokxmFTkUE1YAgWUOl1nyamo2qR+1uGJAIGYPPI3njbMgX3i4V30fHjygxmZRRg:uuokxmFTkUMYi1t2HsNx3jbDXSC30fDj

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

193.23.160.13:7707

Mutex

vyPtzxVUyfQ3

Attributes

delay
3
install
true
install_file
Server-Host.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

resource	yara_rule
behavioral1/files/0x0009000000016591-15.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2828	Server-Host.exe

Loads dropped DLL 1 IoCs

pid	Process
2284	cmd.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Server-Host.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c81b9af6fd20ff231e4ec8ce366db0b0N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2224	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

pid	Process
1784	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2152	c81b9af6fd20ff231e4ec8ce366db0b0N.exe
2152	c81b9af6fd20ff231e4ec8ce366db0b0N.exe
2152	c81b9af6fd20ff231e4ec8ce366db0b0N.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2152	c81b9af6fd20ff231e4ec8ce366db0b0N.exe
Token: SeDebugPrivilege	2828	Server-Host.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2152 wrote to memory of 2416	2152	c81b9af6fd20ff231e4ec8ce366db0b0N.exe	31
PID 2152 wrote to memory of 2416	2152	c81b9af6fd20ff231e4ec8ce366db0b0N.exe	31
PID 2152 wrote to memory of 2416	2152	c81b9af6fd20ff231e4ec8ce366db0b0N.exe	31
PID 2152 wrote to memory of 2416	2152	c81b9af6fd20ff231e4ec8ce366db0b0N.exe	31
PID 2152 wrote to memory of 2284	2152	c81b9af6fd20ff231e4ec8ce366db0b0N.exe	33
PID 2152 wrote to memory of 2284	2152	c81b9af6fd20ff231e4ec8ce366db0b0N.exe	33
PID 2152 wrote to memory of 2284	2152	c81b9af6fd20ff231e4ec8ce366db0b0N.exe	33
PID 2152 wrote to memory of 2284	2152	c81b9af6fd20ff231e4ec8ce366db0b0N.exe	33
PID 2416 wrote to memory of 1784	2416	cmd.exe	35
PID 2416 wrote to memory of 1784	2416	cmd.exe	35
PID 2416 wrote to memory of 1784	2416	cmd.exe	35
PID 2416 wrote to memory of 1784	2416	cmd.exe	35
PID 2284 wrote to memory of 2224	2284	cmd.exe	36
PID 2284 wrote to memory of 2224	2284	cmd.exe	36
PID 2284 wrote to memory of 2224	2284	cmd.exe	36
PID 2284 wrote to memory of 2224	2284	cmd.exe	36
PID 2284 wrote to memory of 2828	2284	cmd.exe	37
PID 2284 wrote to memory of 2828	2284	cmd.exe	37
PID 2284 wrote to memory of 2828	2284	cmd.exe	37
PID 2284 wrote to memory of 2828	2284	cmd.exe	37

C:\Users\Admin\AppData\Local\Temp\c81b9af6fd20ff231e4ec8ce366db0b0N.exe
"C:\Users\Admin\AppData\Local\Temp\c81b9af6fd20ff231e4ec8ce366db0b0N.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2152
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Server-Host" /tr '"C:\Users\Admin\AppData\Roaming\Server-Host.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2416
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Server-Host" /tr '"C:\Users\Admin\AppData\Roaming\Server-Host.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1784
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpD20E.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2284
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2224
- - C:\Users\Admin\AppData\Roaming\Server-Host.exe
    "C:\Users\Admin\AppData\Roaming\Server-Host.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2828

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpD20E.tmp.bat

Filesize
155B

MD5
caefacb6dd18176e37a6873e407002a9

SHA1
e7e5584449e00a3603148cf11d97057ee98e0560

SHA256
8585e8d1683a6c9e389cc79d664ae4da398f6f2352131551a6f5b64546e5007e

SHA512
fd5c04d0a2bdd8b3f44bd2b025b39232ea9c0d5d9c459460a28bfe83335e8f2435062d615e82a102d7be91561443ef5921e1573d7557cab67faba26c9028ba01

Download Submit
C:\Users\Admin\AppData\Roaming\Server-Host.exe

Filesize
45KB

MD5
c81b9af6fd20ff231e4ec8ce366db0b0

SHA1
6342a91dd793055d6767259d2b7eaac753e90cf4

SHA256
353120b1c48a0071140cbf448d6e1eb88ebaf80a1bd9b6b7e39da0eeaeac0965

SHA512
92c289265d2c4af7608c4aac9065fbbeb63f473f517df4400c1ed74bc53ebce137d61504005344c80bd3c5a076fff4c7070a6e1b4b957036155505d5958cc61e

Download Submit
memory/2152-0-0x000000007469E000-0x000000007469F000-memory.dmp

Filesize
4KB

Download
memory/2152-1-0x0000000001250000-0x0000000001262000-memory.dmp

Filesize
72KB

Download
memory/2152-2-0x0000000074690000-0x0000000074D7E000-memory.dmp

Filesize
6.9MB

Download
memory/2152-12-0x0000000074690000-0x0000000074D7E000-memory.dmp

Filesize
6.9MB

Download
memory/2828-16-0x0000000000AC0000-0x0000000000AD2000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads