asyncrat | 59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c

General

Target
59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.exe
Size 45KB
Sample260817-sebb9adj51
SHA256 59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c
MD5 a46988c35d7015e6174cfb8997b46ccd
SHA1 0ab22a5c911010bed1bf83eb1682a60ccd230692
SHA512 11259685cafcb9bda142f5242dea1209c016ee85e3d4a27b333457a9df5760a1368ef80f21ebd9d7e492ee4027bf932542b84b3a78edf5806b374b3c62e1165c
SSDEEP 768:wuDWZTpw7bmaWUg3gSk0mo2qld3HE4eVoOPIGjzjbigV3ilJvCOtDn3msBDZMx:wuDWZTpMZSB2cU1o3Gj3bFVSlhl9mqdO
TLSH
T1D8231A003BE8812BF2BE4F74A9F26245467AF6737603D6491CC4529B5713FC68A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default command_and_control defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

mio9ecge.name:80
mio9ecge.name:22
mio9ecge.name:8080
mio9ecge.name:8880
mio9ecge.name:2052
mio9ecge.name:2082
mio9ecge.name:2086
mio9ecge.name:2095
mio9ecge.name:443
mio9ecge.name:2053
mio9ecge.name:2083
mio9ecge.name:2087
mio9ecge.name:2096
mio9ecge.name:8443
www.mio9ecge.name:80
www.mio9ecge.name:22
www.mio9ecge.name:8080
www.mio9ecge.name:8880
www.mio9ecge.name:2052
www.mio9ecge.name:2082
www.mio9ecge.name:2086
www.mio9ecge.name:2095
www.mio9ecge.name:443
www.mio9ecge.name:2053
www.mio9ecge.name:2083
www.mio9ecge.name:2087
www.mio9ecge.name:2096
www.mio9ecge.name:8443
trisis.mio9ecge.name:80
trisis.mio9ecge.name:22
trisis.mio9ecge.name:8080
trisis.mio9ecge.name:8880
trisis.mio9ecge.name:2052
trisis.mio9ecge.name:2082
trisis.mio9ecge.name:2086
trisis.mio9ecge.name:2095
trisis.mio9ecge.name:443
trisis.mio9ecge.name:2053
trisis.mio9ecge.name:2083
trisis.mio9ecge.name:2087
trisis.mio9ecge.name:2096
trisis.mio9ecge.name:8443
malware.mio9ecge.name:80
malware.mio9ecge.name:22
malware.mio9ecge.name:8080
malware.mio9ecge.name:8880
malware.mio9ecge.name:2052
malware.mio9ecge.name:2082
malware.mio9ecge.name:2086
malware.mio9ecge.name:2095
malware.mio9ecge.name:443
malware.mio9ecge.name:2053
malware.mio9ecge.name:2083
malware.mio9ecge.name:2087
malware.mio9ecge.name:2096
malware.mio9ecge.name:8443

Mutex

v6AnylaK499j

Attributes

delay
0
install
true
install_file
mk0vl.exe
install_folder
%AppData%

aes.plain

Signatures

Family: AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Async RAT payload 2 IoCs

rat

resource	yara_rule
behavioral1/files/0x000900000002442d-8.dat	family_asyncrat
behavioral1/memory/4232-10-0x0000000003130000-0x0000000003140000-memory.dmp	family_asyncrat

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-668679576-120646659-2289335452-1000\Control Panel\International\Geo\Nation	59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.exe

Executes dropped EXE 2 IoCs

pid	Process
4232	mk0vl.exe
1124	mk0vl.exe

Outbound SSH connection to public host 2 TTPs 6 IoCs

SSH is used for remote access. This may indicate SSH host discovery, encrypted C2 traffic, or data exfiltration.

command_and_control

Protocol Tunneling

T1572

Network Service Discovery

T1046

description	flow	ioc	pid	Process
SSH destination	26	104.26.15.221:22	4232	mk0vl.exe
SSH destination	52	172.67.74.247:22	4232	mk0vl.exe
SSH destination	54	104.26.14.221:22	4232	mk0vl.exe
SSH destination	57	104.26.15.221:22	4232	mk0vl.exe
SSH destination	4	172.67.74.247:22	4232	mk0vl.exe
SSH destination	9	104.26.14.221:22	4232	mk0vl.exe

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

System Information Discovery
T1082

Executes a command shell one-liner 1 TTPs 2 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
3712	cmd.exe
5044	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 7 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	mk0vl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mk0vl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4864	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
2496	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
3344	59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.exe
3344	59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.exe
3344	59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.exe
3344	59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.exe
3344	59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.exe
3344	59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.exe
3344	59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.exe
3344	59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.exe
3344	59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.exe
3344	59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.exe
3344	59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.exe
3344	59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.exe
3344	59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.exe
3344	59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.exe
3344	59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.exe
3344	59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.exe
3344	59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.exe
3344	59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.exe
3344	59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.exe
3344	59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.exe
3344	59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.exe
3344	59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.exe
3344	59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3344	59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.exe
Token: SeDebugPrivilege	4232	mk0vl.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3344 wrote to memory of 3712	3344	59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.exe	85
PID 3344 wrote to memory of 5044	3344	59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.exe	87
PID 5044 wrote to memory of 4864	5044	cmd.exe	90
PID 3712 wrote to memory of 2496	3712	cmd.exe	89
PID 5044 wrote to memory of 1124	5044	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.exe
"C:\Users\Admin\AppData\Local\Temp\59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3344
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "mk0vl" /tr '"C:\Users\Admin\AppData\Roaming\mk0vl.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3712
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "mk0vl" /tr '"C:\Users\Admin\AppData\Roaming\mk0vl.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2496
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpD35.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5044
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4864
- - C:\Users\Admin\AppData\Roaming\mk0vl.exe
    "C:\Users\Admin\AppData\Roaming\mk0vl.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1124

C:\Users\Admin\AppData\Roaming\mk0vl.exe
"C:\Users\Admin\AppData\Roaming\mk0vl.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4232

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

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

Network Service Discovery

Query Registry

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Protocol Tunneling

1

T1572

Exfiltration

Impact

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Downloads

tmpD35.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpD35.tmp.bat
Size 148B
SHA256 5010e79e634236e4f57e23e39a0a7593339a586b1d1b6237653c53cb175ca75e
MD5 522a8f2bc7a4c23b1556cea37544c5b1
SHA1 25de9cdcd8d2cf18ef53ff4132f025ea3081321c
SHA512 71903951e506da0e398387554d21e8ce40aaccd5608a8a4fda562faa8f4ed54a303b0193d6c39d9809016f89276a2b887771335ae76c79068e76092fe2f4397d
TLSH
T1F2C02B5352C6EA5E780554131AFBD48DD1736C293F40BF00C304400D1380C88F0DD342
MD5 SHA1 SHA512 TLSH

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mk0vl.exe

Path C:\Users\Admin\AppData\Roaming\mk0vl.exe
Size 45KB
SHA256 59a6598bfb44b5c4f07e02b195e5c76e74342bdab7e1647cb7e7ae1e2db8057c
MD5 a46988c35d7015e6174cfb8997b46ccd
SHA1 0ab22a5c911010bed1bf83eb1682a60ccd230692
SHA512 11259685cafcb9bda142f5242dea1209c016ee85e3d4a27b333457a9df5760a1368ef80f21ebd9d7e492ee4027bf932542b84b3a78edf5806b374b3c62e1165c
SSDEEP 768:wuDWZTpw7bmaWUg3gSk0mo2qld3HE4eVoOPIGjzjbigV3ilJvCOtDn3msBDZMx:wuDWZTpMZSB2cU1o3Gj3bFVSlhl9mqdO
TLSH
T1D8231A003BE8812BF2BE4F74A9F26245467AF6737603D6491CC4529B5713FC68A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/3344-0-0x00000000000E0000-0x00000000000F2000-memory.dmp

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memory/3344-1-0x00000000049B0000-0x00000000049C0000-memory.dmp

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memory/3344-2-0x00000000049C0000-0x0000000004A5C000-memory.dmp

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memory/4232-10-0x0000000003130000-0x0000000003140000-memory.dmp

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memory/4232-13-0x0000000003130000-0x0000000003140000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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