asyncrat | 014dba300f314de1c296005e39b4263d50ff032b7eebea2353b2285c90f891ed

General

Target

014dba300f314de1c296005e39b4263d50ff032b7eebea2353b2285c90f891ed.exe
Size

798KB
MD5

0997e0d8d2828ad4da27e830fd6562d3
SHA1

ddcb9cb2462b6f7b2a688a7696e49164a1d40d44
SHA256

014dba300f314de1c296005e39b4263d50ff032b7eebea2353b2285c90f891ed
SHA512

4e356cef6d1d50d1d7ab249177703d06f6a34c0b37405e00c47d850aeac782a6fd0562daed815df05659ff16b81698cd6a11a034dc3b599f019d778cf67191ef
SSDEEP

12288:AyveQB/fTHIGaPkKEYzURNAwbAgWtJZLGxDUeYnqaGsSGo0/O6nG:AuDXTIGaPhEYzUzA0ASxA/qnsO6nG

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

opakk.hopto.org:34397

Mutex

AkzHMC1tjq5U

Attributes

delay
3
install
true
install_file
WUDFHost.exe
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x000800000002426f-6.dat	family_asyncrat

Checks computer location settings 2 TTPs 2 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-1-5-21-3975168204-1612096350-4002976354-1000\Control Panel\International\Geo\Nation	014dba300f314de1c296005e39b4263d50ff032b7eebea2353b2285c90f891ed.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3975168204-1612096350-4002976354-1000\Control Panel\International\Geo\Nation	Test1.exe

Executes dropped EXE 2 IoCs

pid	Process
940	Test1.exe
3536	WUDFHost.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	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	WUDFHost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Test1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3524	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
6084	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
940	Test1.exe
940	Test1.exe
940	Test1.exe
940	Test1.exe
940	Test1.exe
940	Test1.exe
940	Test1.exe
940	Test1.exe
940	Test1.exe
940	Test1.exe
940	Test1.exe
940	Test1.exe
940	Test1.exe
940	Test1.exe
940	Test1.exe
940	Test1.exe
940	Test1.exe
940	Test1.exe
940	Test1.exe
940	Test1.exe
940	Test1.exe
940	Test1.exe
940	Test1.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	940	Test1.exe
Token: SeDebugPrivilege	3536	WUDFHost.exe
Token: SeDebugPrivilege	3536	WUDFHost.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 6108 wrote to memory of 940	6108	014dba300f314de1c296005e39b4263d50ff032b7eebea2353b2285c90f891ed.exe	94
PID 6108 wrote to memory of 940	6108	014dba300f314de1c296005e39b4263d50ff032b7eebea2353b2285c90f891ed.exe	94
PID 6108 wrote to memory of 940	6108	014dba300f314de1c296005e39b4263d50ff032b7eebea2353b2285c90f891ed.exe	94
PID 940 wrote to memory of 2752	940	Test1.exe	99
PID 940 wrote to memory of 2752	940	Test1.exe	99
PID 940 wrote to memory of 2752	940	Test1.exe	99
PID 940 wrote to memory of 720	940	Test1.exe	101
PID 940 wrote to memory of 720	940	Test1.exe	101
PID 940 wrote to memory of 720	940	Test1.exe	101
PID 2752 wrote to memory of 6084	2752	cmd.exe	103
PID 2752 wrote to memory of 6084	2752	cmd.exe	103
PID 2752 wrote to memory of 6084	2752	cmd.exe	103
PID 720 wrote to memory of 3524	720	cmd.exe	104
PID 720 wrote to memory of 3524	720	cmd.exe	104
PID 720 wrote to memory of 3524	720	cmd.exe	104
PID 720 wrote to memory of 3536	720	cmd.exe	105
PID 720 wrote to memory of 3536	720	cmd.exe	105
PID 720 wrote to memory of 3536	720	cmd.exe	105

C:\Users\Admin\AppData\Local\Temp\014dba300f314de1c296005e39b4263d50ff032b7eebea2353b2285c90f891ed.exe
"C:\Users\Admin\AppData\Local\Temp\014dba300f314de1c296005e39b4263d50ff032b7eebea2353b2285c90f891ed.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:6108
- C:\Users\Admin\AppData\Local\Temp\RarSFX0\Test1.exe
  "C:\Users\Admin\AppData\Local\Temp\RarSFX0\Test1.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:940
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "WUDFHost" /tr '"C:\Users\Admin\AppData\Roaming\WUDFHost.exe"' & exit
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2752
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "WUDFHost" /tr '"C:\Users\Admin\AppData\Roaming\WUDFHost.exe"'
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:6084
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp972F.tmp.bat""
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:720
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      System Location Discovery: System Language Discovery
      Delays execution with timeout.exe
      PID:3524
  - - C:\Users\Admin\AppData\Roaming\WUDFHost.exe
      "C:\Users\Admin\AppData\Roaming\WUDFHost.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      PID:3536

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

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

C:\Users\Admin\AppData\Local\Temp\RarSFX0\Test1.exe

Filesize
74KB

MD5
8426efde5119f38f7436dc6170635bae

SHA1
1f68a03059e2b27b1b4529f906fe7336a743b2ac

SHA256
8d30a30ff9b086ccb05f68a4297f73cdc252d2e847dfd3eee35e770c25d99689

SHA512
8c1a0338f9b53657866eb5b8f2b1e9a736877ee599a38ad6c956eec2062a4b62501b03893b93d9995c062f8c90fb7901ebdf4b3a4ef2a3944629cd47f9df7e57

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp972F.tmp.bat

Filesize
152B

MD5
dc51b27ec444833522fd2d633d03149c

SHA1
d2d290e287959ba4cf4a678fd832046ff28f171b

SHA256
04f8b2923640c4263817578f39dc31b2b6405a68cfa8f99ecaf90f21de2155ba

SHA512
615ef9c258ce0b68541d960e65cc88488d7aa43da1bc45fdfa4f71df26780b16fe934a20e86517bb0fa9bfbb9cd1545595abb8c9d98b326e45963243505a86c1

Download Submit
memory/940-14-0x000000007533E000-0x000000007533F000-memory.dmp

Filesize
4KB

Download
memory/940-15-0x0000000000AE0000-0x0000000000AF8000-memory.dmp

Filesize
96KB

Download
memory/940-16-0x0000000075330000-0x0000000075AE0000-memory.dmp

Filesize
7.7MB

Download
memory/940-17-0x00000000054E0000-0x0000000005546000-memory.dmp

Filesize
408KB

Download
memory/940-18-0x0000000005930000-0x00000000059CC000-memory.dmp

Filesize
624KB

Download
memory/940-23-0x0000000075330000-0x0000000075AE0000-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