asyncrat | 6f7f58981acf3e3afee3d824db3983daf9b482e914ca7a4ea3fa37e19218b980

General

Target
tmphv1a657n.exe
Size 45KB
Sample260602-lbhtlahx91
SHA256 6f7f58981acf3e3afee3d824db3983daf9b482e914ca7a4ea3fa37e19218b980
MD5 cc124b1080875d8bff7bc0c32ead85ea
SHA1 c62ce2d28513bb0079e5bf409186ffeda6e8daf0
SHA512 abd79590f84022574cb24645404801a84c7926f182df5ab854eff4830560b438782201b1026801f098e3c3125085482c729dd1db2ce5720fd38510cfa55bc694
SSDEEP 768:FugnNTjgkH7F7WUHF9pmo2q7IL5P02FUFd8Ykk8PIYzjbHgX3iHYkfVApZTXOFBS:FugnNTcIb2TLDmTBY3bAXSHApZodSx
TLSH
T13A232A0037E9812BF2BE4F7498F26245867AF6633603D5491CC451DB5B23BC69A43AFE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

clique.br.com defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

clique.br.com

C2

clique.br.com:80
clique.br.com:443
clique.br.com:3306
clique.br.com:8080
clique.br.com:8443
clique.br.com:20
clique.br.com:25

Mutex

UJYIav0PJFB3

Attributes

delay
3
install
true
install_file
da64.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/0x0002000000022ce3-9.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-1-5-21-204488895-2999877624-296153668-1000\Control Panel\International\Geo\Nation	tmphv1a657n.exe

Executes dropped EXE 2 IoCs

pid	Process
1804	da64.exe
2108	da64.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	tmphv1a657n.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	da64.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	da64.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
5032	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
3756	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
4744	tmphv1a657n.exe
4744	tmphv1a657n.exe
4744	tmphv1a657n.exe
4744	tmphv1a657n.exe
4744	tmphv1a657n.exe
4744	tmphv1a657n.exe
4744	tmphv1a657n.exe
4744	tmphv1a657n.exe
4744	tmphv1a657n.exe
4744	tmphv1a657n.exe
4744	tmphv1a657n.exe
4744	tmphv1a657n.exe
4744	tmphv1a657n.exe
4744	tmphv1a657n.exe
4744	tmphv1a657n.exe
4744	tmphv1a657n.exe
4744	tmphv1a657n.exe
4744	tmphv1a657n.exe
4744	tmphv1a657n.exe
4744	tmphv1a657n.exe
4744	tmphv1a657n.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4744	tmphv1a657n.exe
Token: SeDebugPrivilege	1804	da64.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4744 wrote to memory of 3580	4744	tmphv1a657n.exe	91
PID 4744 wrote to memory of 4608	4744	tmphv1a657n.exe	93
PID 4608 wrote to memory of 5032	4608	cmd.exe	95
PID 3580 wrote to memory of 3756	3580	cmd.exe	96
PID 4608 wrote to memory of 2108	4608	cmd.exe	99

C:\Users\Admin\AppData\Local\Temp\tmphv1a657n.exe
"C:\Users\Admin\AppData\Local\Temp\tmphv1a657n.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4744
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "da64" /tr '"C:\Users\Admin\AppData\Roaming\da64.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3580
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "da64" /tr '"C:\Users\Admin\AppData\Roaming\da64.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3756
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp50AB.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4608
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:5032
- - C:\Users\Admin\AppData\Roaming\da64.exe
    "C:\Users\Admin\AppData\Roaming\da64.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2108

C:\Users\Admin\AppData\Roaming\da64.exe
"C:\Users\Admin\AppData\Roaming\da64.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1804

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

tmp50AB.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp50AB.tmp.bat
Size 148B
SHA256 91a84c6f423f63809b316a03ef8b54576bc8770ada58e0e0e7073ff3bda26034
MD5 666c4ff3d6e3fb2b577753999072d060
SHA1 7eedf618fe7db0016eb2f45e85ba3e947d14825f
SHA512 b3d7dd24653e25d8d8b3965306a413b1c7c6bd13bf272d7b96d6ddf206c8c8e2b981387b3f142e50f5b848a9bb5274bbd541e6963adffa87c27815a508e849af
TLSH
T1EAC02B5351C5EA0E290D181302FAD98CE1736CAA3F80BB00CB44441F12C1448F0D9346
MD5 SHA1 SHA512 TLSH

Submit Download

da64.exe

Path C:\Users\Admin\AppData\Roaming\da64.exe
Size 45KB
SHA256 6f7f58981acf3e3afee3d824db3983daf9b482e914ca7a4ea3fa37e19218b980
MD5 cc124b1080875d8bff7bc0c32ead85ea
SHA1 c62ce2d28513bb0079e5bf409186ffeda6e8daf0
SHA512 abd79590f84022574cb24645404801a84c7926f182df5ab854eff4830560b438782201b1026801f098e3c3125085482c729dd1db2ce5720fd38510cfa55bc694
SSDEEP 768:FugnNTjgkH7F7WUHF9pmo2q7IL5P02FUFd8Ykk8PIYzjbHgX3iHYkfVApZTXOFBS:FugnNTcIb2TLDmTBY3bAXSHApZodSx
TLSH
T13A232A0037E9812BF2BE4F7498F26245867AF6633603D5491CC451DB5B23BC69A43AFE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4744-0-0x0000000000970000-0x0000000000982000-memory.dmp

Download

memory/4744-1-0x00007FFE8A390000-0x00007FFE8A585000-memory.dmp

Download

memory/4744-2-0x0000000005380000-0x000000000541C000-memory.dmp

Download

memory/4744-7-0x00007FFE8A390000-0x00007FFE8A585000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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