asyncrat | 7871c3cf4d34a6fbbe96f4e5f4716d8998682bdd995bd9e2a7ec6e0388bfeb47

General

Target
tmp7wjw7czd.exe
Size 45KB
Sample260602-j76jesh14q
SHA256 7871c3cf4d34a6fbbe96f4e5f4716d8998682bdd995bd9e2a7ec6e0388bfeb47
MD5 6360748b2a3c4ca9e8ab2cdaa1349623
SHA1 e90bb0494e5da04ad9a7ca4666753566f1f44413
SHA512 191d1b0dbcfff1f1e5a9902d70a217f54793d8a298ea4dbe473a64962b4b1724675ddd3ce7609d55b4a33fb195c425ed94cf2c6f743b1463c26232ae7dac50f1
SSDEEP 768:8uuPpTg7GBoWUSH6+mo2qYlCSwTMjPIuujbNgX3iqCLuBSmLZ7fcQFW0zmPBDZ0x:8uuPpTgyf2dg1uCbaXSLKZ7LVS5d0x
TLSH
T146232B0037E9C12BF2BE4F78ADF26145867AB6673603D68E1CC441DB5623BC58A426FD
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

alconight-pattaya.com:443
alconight-pattaya.com:80
alconight-pattaya.com:7797
alconight-pattaya.com:8707
alconight-pattaya.com:6620
www.alconight-pattaya.com:443
www.alconight-pattaya.com:80
www.alconight-pattaya.com:7797
www.alconight-pattaya.com:8707
www.alconight-pattaya.com:6620
zbot.alconight-pattaya.com:443
zbot.alconight-pattaya.com:80
zbot.alconight-pattaya.com:7797
zbot.alconight-pattaya.com:8707
zbot.alconight-pattaya.com:6620
nanocore.alconight-pattaya.com:443
nanocore.alconight-pattaya.com:80
nanocore.alconight-pattaya.com:7797
nanocore.alconight-pattaya.com:8707
nanocore.alconight-pattaya.com:6620
malware.alconight-pattaya.com:443
malware.alconight-pattaya.com:80
malware.alconight-pattaya.com:7797
malware.alconight-pattaya.com:8707
malware.alconight-pattaya.com:6620
blaster.alconight-pattaya.com:443
blaster.alconight-pattaya.com:80
blaster.alconight-pattaya.com:7797
blaster.alconight-pattaya.com:8707
blaster.alconight-pattaya.com:6620

Mutex

Cnnm6LXJpqup

Attributes

delay
0
install
true
install_file
w4wj07.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 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x0008000000024246-8.dat	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-1-5-21-876885714-46325919-1482798410-1000\Control Panel\International\Geo\Nation	tmp7wjw7czd.exe

Executes dropped EXE 2 IoCs

pid	Process
1236	w4wj07.exe
3568	w4wj07.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 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	cmd.exe
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	w4wj07.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	w4wj07.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tmp7wjw7czd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
1016	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
1336	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
3032	tmp7wjw7czd.exe
3032	tmp7wjw7czd.exe
3032	tmp7wjw7czd.exe
3032	tmp7wjw7czd.exe
3032	tmp7wjw7czd.exe
3032	tmp7wjw7czd.exe
3032	tmp7wjw7czd.exe
3032	tmp7wjw7czd.exe
3032	tmp7wjw7czd.exe
3032	tmp7wjw7czd.exe
3032	tmp7wjw7czd.exe
3032	tmp7wjw7czd.exe
3032	tmp7wjw7czd.exe
3032	tmp7wjw7czd.exe
3032	tmp7wjw7czd.exe
3032	tmp7wjw7czd.exe
3032	tmp7wjw7czd.exe
3032	tmp7wjw7czd.exe
3032	tmp7wjw7czd.exe
3032	tmp7wjw7czd.exe
3032	tmp7wjw7czd.exe
3032	tmp7wjw7czd.exe
3032	tmp7wjw7czd.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3032	tmp7wjw7czd.exe
Token: SeDebugPrivilege	1236	w4wj07.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3032 wrote to memory of 2700	3032	tmp7wjw7czd.exe	90
PID 3032 wrote to memory of 3144	3032	tmp7wjw7czd.exe	92
PID 3144 wrote to memory of 1016	3144	cmd.exe	94
PID 2700 wrote to memory of 1336	2700	cmd.exe	95
PID 3144 wrote to memory of 3568	3144	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\tmp7wjw7czd.exe
"C:\Users\Admin\AppData\Local\Temp\tmp7wjw7czd.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3032
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "w4wj07" /tr '"C:\Users\Admin\AppData\Roaming\w4wj07.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2700
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "w4wj07" /tr '"C:\Users\Admin\AppData\Roaming\w4wj07.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1336
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp4EF6.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3144
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1016
- - C:\Users\Admin\AppData\Roaming\w4wj07.exe
    "C:\Users\Admin\AppData\Roaming\w4wj07.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:3568

C:\Users\Admin\AppData\Roaming\w4wj07.exe
"C:\Users\Admin\AppData\Roaming\w4wj07.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1236

Network

MITRE ATT&CK Enterprise v16

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

Query Registry

1

T1012

System Information Discovery

2

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

tmp4EF6.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp4EF6.tmp.bat
Size 150B
SHA256 d1d6048c52d3d03e925f57284bb82ebb5020a70b4b35baf5456e743cf57197a1
MD5 346270486f214599d935262b0eadc8dd
SHA1 59ec304b369a771fe4b73b48f8cef173960dee95
SHA512 8406d9246bcb446ae6dbb6995297ee353fd6a0d8763891e4d3016b92adc5c535d3bbb1746ade7db893b66a6234a526487c2afa07a51dba23fe0e2a4477243e5a
TLSH
T106C08C4655C5EA0E6805243302FA958C9162A8593E40BB00830940491280448E0A9346
MD5 SHA1 SHA512 TLSH

Submit Download

w4wj07.exe

Path C:\Users\Admin\AppData\Roaming\w4wj07.exe
Size 45KB
SHA256 7871c3cf4d34a6fbbe96f4e5f4716d8998682bdd995bd9e2a7ec6e0388bfeb47
MD5 6360748b2a3c4ca9e8ab2cdaa1349623
SHA1 e90bb0494e5da04ad9a7ca4666753566f1f44413
SHA512 191d1b0dbcfff1f1e5a9902d70a217f54793d8a298ea4dbe473a64962b4b1724675ddd3ce7609d55b4a33fb195c425ed94cf2c6f743b1463c26232ae7dac50f1
SSDEEP 768:8uuPpTg7GBoWUSH6+mo2qYlCSwTMjPIuujbNgX3iqCLuBSmLZ7fcQFW0zmPBDZ0x:8uuPpTgyf2dg1uCbaXSLKZ7LVS5d0x
TLSH
T146232B0037E9C12BF2BE4F78ADF26145867AB6673603D68E1CC441DB5623BC58A426FD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1236-10-0x0000000004C00000-0x0000000004C10000-memory.dmp

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memory/1236-13-0x0000000004C00000-0x0000000004C10000-memory.dmp

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memory/3032-0-0x0000000000730000-0x0000000000742000-memory.dmp

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memory/3032-1-0x0000000005120000-0x0000000005130000-memory.dmp

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memory/3032-2-0x0000000005130000-0x00000000051CC000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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