asyncrat | 91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820

General

Target

91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820.exe
Size

48KB
MD5

a7ed4ba445aa61c4632dd6579c212bf5
SHA1

a81d766d12a6dd8c3cec537387a089650b34e103
SHA256

91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820
SHA512

2a0e0afdecf803657f2d67433399dc3119a3b4221334a9c8d7cb3e3e741457aaa26d2edd32377a102f1c539a4ef065cb5296d4cdfe7657993223e675e3fd4bae
SSDEEP

768:2u62dT9slTJWUhDuzmo2qLGdFx4mMaYc13WOAo0E0brMIYLECgNREeo7Hkc1KXc9:2u62dT9We2ZamecoOA1brM6CgAHkSpdX

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

127.0.0.1:1604

127.0.0.1:22253

eu-central-7075.packetriot.net:6606

eu-central-7075.packetriot.net:7707

eu-central-7075.packetriot.net:8808

eu-central-7075.packetriot.net:1604

eu-central-7075.packetriot.net:22253

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
svchost.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
behavioral2/files/0x000100000002aa8c-12.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
4488	svchost.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	91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1412	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
4936	schtasks.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
4112	91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820.exe
4112	91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820.exe
4112	91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820.exe
4112	91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820.exe
4112	91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820.exe
4112	91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820.exe
4112	91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820.exe
4112	91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820.exe
4112	91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820.exe
4112	91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820.exe
4112	91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820.exe
4112	91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820.exe
4112	91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820.exe
4112	91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820.exe
4112	91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820.exe
4112	91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820.exe
4112	91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820.exe
4112	91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820.exe
4112	91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4112	91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820.exe
Token: SeDebugPrivilege	4488	svchost.exe
Token: SeDebugPrivilege	4488	svchost.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4112 wrote to memory of 1224	4112	91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820.exe	85
PID 4112 wrote to memory of 1224	4112	91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820.exe	85
PID 4112 wrote to memory of 1224	4112	91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820.exe	85
PID 4112 wrote to memory of 2668	4112	91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820.exe	87
PID 4112 wrote to memory of 2668	4112	91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820.exe	87
PID 4112 wrote to memory of 2668	4112	91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820.exe	87
PID 2668 wrote to memory of 1412	2668	cmd.exe	89
PID 2668 wrote to memory of 1412	2668	cmd.exe	89
PID 2668 wrote to memory of 1412	2668	cmd.exe	89
PID 1224 wrote to memory of 4936	1224	cmd.exe	90
PID 1224 wrote to memory of 4936	1224	cmd.exe	90
PID 1224 wrote to memory of 4936	1224	cmd.exe	90
PID 2668 wrote to memory of 4488	2668	cmd.exe	94
PID 2668 wrote to memory of 4488	2668	cmd.exe	94
PID 2668 wrote to memory of 4488	2668	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820.exe
"C:\Users\Admin\AppData\Local\Temp\91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4112
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1224
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4936
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8F8E.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2668
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1412
- - C:\Users\Admin\AppData\Roaming\svchost.exe
    "C:\Users\Admin\AppData\Roaming\svchost.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:4488

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\tmp8F8E.tmp.bat

Filesize
151B

MD5
2a0bdcabfd0a6e01742697c1993b431e

SHA1
550d1c5ce9c9fb8dbdd4cd4f3fbf45191533da63

SHA256
e45eb136b087813e9db4aa8e7b0e8ab527d08ace7cf11111c573babec8740748

SHA512
fa60a8a0a8ee11cdbe2a1a5e015f0769eae64db766f51fd76c90ed2d80c01f9a94c1db1a4c655392d9337825fd155660a59154cbccaf1d10ea259a997acdec5d

Download Submit
C:\Users\Admin\AppData\Roaming\svchost.exe

Filesize
48KB

MD5
a7ed4ba445aa61c4632dd6579c212bf5

SHA1
a81d766d12a6dd8c3cec537387a089650b34e103

SHA256
91fb355fdc173c40fa77f8a252031d6bc32fab91c5e5573da28044494691c820

SHA512
2a0e0afdecf803657f2d67433399dc3119a3b4221334a9c8d7cb3e3e741457aaa26d2edd32377a102f1c539a4ef065cb5296d4cdfe7657993223e675e3fd4bae

Download Submit
memory/4112-0-0x0000000074B5E000-0x0000000074B5F000-memory.dmp

Filesize
4KB

Download
memory/4112-1-0x0000000000EE0000-0x0000000000EF2000-memory.dmp

Filesize
72KB

Download
memory/4112-2-0x0000000074B50000-0x0000000075301000-memory.dmp

Filesize
7.7MB

Download
memory/4112-3-0x00000000059D0000-0x0000000005A36000-memory.dmp

Filesize
408KB

Download
memory/4112-4-0x0000000005DE0000-0x0000000005E7C000-memory.dmp

Filesize
624KB

Download
memory/4112-10-0x0000000074B50000-0x0000000075301000-memory.dmp

Filesize
7.7MB

Download
memory/4488-14-0x0000000074B50000-0x0000000075301000-memory.dmp

Filesize
7.7MB

Download
memory/4488-15-0x0000000074B50000-0x0000000075301000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads