asyncrat | 9a5fb8e4c338f4a5afe6faa33c92c1374102e42e18f30be6487e7d5d8649ce06

General

Target
9a5fb8e4c338f4a5afe6faa33c92c1374102e42e18f30be6487e7d5d8649ce06.exe
Size 45KB
Sample260601-yhs95aet2x
SHA256 9a5fb8e4c338f4a5afe6faa33c92c1374102e42e18f30be6487e7d5d8649ce06
MD5 2d27b705bf2ade6c564eaeedaf890888
SHA1 ec7fc54a2db7e1b08181463af1b7711b15235552
SHA512 23020246c6431e8e27f427dba33fe1d4b709d5a4bbf10ab9c964076064d644d6d502a074b5d4695b27f061a679d16701c3d1e472fb9549718a5025f51242cfce
SSDEEP 768:Yub+dT5UohzWUf8dBmo2qVPmaPol53APIkzjbxgX3irAv6JQbcMePhyBDZrx:Yub+dT5Pk2efob3lk3b+XSg0QbcVPhMP
TLSH
T1652319003BE8817BF2BE4F78ADF26205467AF2677603D64A1CC451DB5613BC2DA426ED
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

sexhay88.blog:443
sexhay88.blog:80
sexhay88.blog:7797
sexhay88.blog:8707
sexhay88.blog:6620
www.sexhay88.blog:443
www.sexhay88.blog:80
www.sexhay88.blog:7797
www.sexhay88.blog:8707
www.sexhay88.blog:6620
sasser.sexhay88.blog:443
sasser.sexhay88.blog:80
sasser.sexhay88.blog:7797
sasser.sexhay88.blog:8707
sasser.sexhay88.blog:6620
blaster.sexhay88.blog:443
blaster.sexhay88.blog:80
blaster.sexhay88.blog:7797
blaster.sexhay88.blog:8707
blaster.sexhay88.blog:6620
remcos.sexhay88.blog:443
remcos.sexhay88.blog:80
remcos.sexhay88.blog:7797
remcos.sexhay88.blog:8707
remcos.sexhay88.blog:6620

Mutex

oIASn1bVFsQI

Attributes

delay
0
install
true
install_file
xzvyuqjx.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/0x000500000002a985-8.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
4748	xzvyuqjx.exe
3488	xzvyuqjx.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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	xzvyuqjx.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	xzvyuqjx.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	9a5fb8e4c338f4a5afe6faa33c92c1374102e42e18f30be6487e7d5d8649ce06.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

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
1420	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
1108	schtasks.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
2720	9a5fb8e4c338f4a5afe6faa33c92c1374102e42e18f30be6487e7d5d8649ce06.exe
2720	9a5fb8e4c338f4a5afe6faa33c92c1374102e42e18f30be6487e7d5d8649ce06.exe
2720	9a5fb8e4c338f4a5afe6faa33c92c1374102e42e18f30be6487e7d5d8649ce06.exe
2720	9a5fb8e4c338f4a5afe6faa33c92c1374102e42e18f30be6487e7d5d8649ce06.exe
2720	9a5fb8e4c338f4a5afe6faa33c92c1374102e42e18f30be6487e7d5d8649ce06.exe
2720	9a5fb8e4c338f4a5afe6faa33c92c1374102e42e18f30be6487e7d5d8649ce06.exe
2720	9a5fb8e4c338f4a5afe6faa33c92c1374102e42e18f30be6487e7d5d8649ce06.exe
2720	9a5fb8e4c338f4a5afe6faa33c92c1374102e42e18f30be6487e7d5d8649ce06.exe
2720	9a5fb8e4c338f4a5afe6faa33c92c1374102e42e18f30be6487e7d5d8649ce06.exe
2720	9a5fb8e4c338f4a5afe6faa33c92c1374102e42e18f30be6487e7d5d8649ce06.exe
2720	9a5fb8e4c338f4a5afe6faa33c92c1374102e42e18f30be6487e7d5d8649ce06.exe
2720	9a5fb8e4c338f4a5afe6faa33c92c1374102e42e18f30be6487e7d5d8649ce06.exe
2720	9a5fb8e4c338f4a5afe6faa33c92c1374102e42e18f30be6487e7d5d8649ce06.exe
2720	9a5fb8e4c338f4a5afe6faa33c92c1374102e42e18f30be6487e7d5d8649ce06.exe
2720	9a5fb8e4c338f4a5afe6faa33c92c1374102e42e18f30be6487e7d5d8649ce06.exe
2720	9a5fb8e4c338f4a5afe6faa33c92c1374102e42e18f30be6487e7d5d8649ce06.exe
2720	9a5fb8e4c338f4a5afe6faa33c92c1374102e42e18f30be6487e7d5d8649ce06.exe
2720	9a5fb8e4c338f4a5afe6faa33c92c1374102e42e18f30be6487e7d5d8649ce06.exe
2720	9a5fb8e4c338f4a5afe6faa33c92c1374102e42e18f30be6487e7d5d8649ce06.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2720	9a5fb8e4c338f4a5afe6faa33c92c1374102e42e18f30be6487e7d5d8649ce06.exe
Token: SeDebugPrivilege	4748	xzvyuqjx.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2720 wrote to memory of 4488	2720	9a5fb8e4c338f4a5afe6faa33c92c1374102e42e18f30be6487e7d5d8649ce06.exe	80
PID 2720 wrote to memory of 4892	2720	9a5fb8e4c338f4a5afe6faa33c92c1374102e42e18f30be6487e7d5d8649ce06.exe	81
PID 4892 wrote to memory of 1420	4892	cmd.exe	84
PID 4488 wrote to memory of 1108	4488	cmd.exe	85
PID 4892 wrote to memory of 3488	4892	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\9a5fb8e4c338f4a5afe6faa33c92c1374102e42e18f30be6487e7d5d8649ce06.exe
"C:\Users\Admin\AppData\Local\Temp\9a5fb8e4c338f4a5afe6faa33c92c1374102e42e18f30be6487e7d5d8649ce06.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2720
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "xzvyuqjx" /tr '"C:\Users\Admin\AppData\Roaming\xzvyuqjx.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4488
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "xzvyuqjx" /tr '"C:\Users\Admin\AppData\Roaming\xzvyuqjx.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1108
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA9AD.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4892
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1420
- - C:\Users\Admin\AppData\Roaming\xzvyuqjx.exe
    "C:\Users\Admin\AppData\Roaming\xzvyuqjx.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:3488

C:\Users\Admin\AppData\Roaming\xzvyuqjx.exe
"C:\Users\Admin\AppData\Roaming\xzvyuqjx.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4748

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

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

tmpA9AD.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpA9AD.tmp.bat
Size 152B
SHA256 adb2d4c8a6e7981e08d680682ba22baea48f065c3c8c4368d95f211547e5fe00
MD5 ff926226e18e9a10f7f37c3a80e720b7
SHA1 61059cac733ade13fd63c8ea7a29075a2dae9fa7
SHA512 e6d773189d908cdc6ba466b021bc7cebad6162957dca7b1ef6d3743e469f5546995784371a9e7d44a5c5352cd78a04363e9b02a2a1884c09b9178c800ff692ab
TLSH
T17CC02B4251C6EA0F280664A302FAE48D96726C1D3F40BB70D708405D7290C5CF0DA341
MD5 SHA1 SHA512 TLSH

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xzvyuqjx.exe

Path C:\Users\Admin\AppData\Roaming\xzvyuqjx.exe
Size 45KB
SHA256 9a5fb8e4c338f4a5afe6faa33c92c1374102e42e18f30be6487e7d5d8649ce06
MD5 2d27b705bf2ade6c564eaeedaf890888
SHA1 ec7fc54a2db7e1b08181463af1b7711b15235552
SHA512 23020246c6431e8e27f427dba33fe1d4b709d5a4bbf10ab9c964076064d644d6d502a074b5d4695b27f061a679d16701c3d1e472fb9549718a5025f51242cfce
SSDEEP 768:Yub+dT5UohzWUf8dBmo2qVPmaPol53APIkzjbxgX3irAv6JQbcMePhyBDZrx:Yub+dT5Pk2efob3lk3b+XSg0QbcVPhMP
TLSH
T1652319003BE8817BF2BE4F78ADF26205467AF2677603D64A1CC451DB5613BC2DA426ED
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2720-0-0x0000000000DE0000-0x0000000000DF2000-memory.dmp

Download

memory/2720-1-0x00000000058D0000-0x00000000058E0000-memory.dmp

Download

memory/2720-2-0x00000000058E0000-0x000000000597C000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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