asyncrat | 99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915

General

Target
99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.exe
Size 45KB
Sample260804-v4px2sed55
SHA256 99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915
MD5 833f6c10e28ebac5b50be2cd63f6c604
SHA1 4fb51c80775e344da896730fcd7817dc87de283e
SHA512 c312af54b2a1bcf153c02875573f7abadd4ac0b7382460859b232d12e9549d521f4c2f2bd246d9f6476f8c4c624de794a3160090088ecbb78af5db76469d1d2d
SSDEEP 768:wuDWZTpw7bmaWUg3gSk0mo2qlQZTohEaSPImzjb5gX3ihcehW5O1Brg8LBDZMx:wuDWZTpMZSB2N4Ea7m3bWXShGIg8ddMx
TLSH
T1E5232B003BE8C227F2BE4F786CF26145867AF6636603D64D1CC4519B5613FC69A42AFE
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

cwlottery.com:80
cwlottery.com:22
cwlottery.com:8080
cwlottery.com:8880
cwlottery.com:2052
cwlottery.com:2082
cwlottery.com:2086
cwlottery.com:2095
cwlottery.com:443
cwlottery.com:2053
cwlottery.com:2083
cwlottery.com:2087
cwlottery.com:2096
cwlottery.com:8443
www.cwlottery.com:80
www.cwlottery.com:22
www.cwlottery.com:8080
www.cwlottery.com:8880
www.cwlottery.com:2052
www.cwlottery.com:2082
www.cwlottery.com:2086
www.cwlottery.com:2095
www.cwlottery.com:443
www.cwlottery.com:2053
www.cwlottery.com:2083
www.cwlottery.com:2087
www.cwlottery.com:2096
www.cwlottery.com:8443
iloveyou.cwlottery.com:80
iloveyou.cwlottery.com:22
iloveyou.cwlottery.com:8080
iloveyou.cwlottery.com:8880
iloveyou.cwlottery.com:2052
iloveyou.cwlottery.com:2082
iloveyou.cwlottery.com:2086
iloveyou.cwlottery.com:2095
iloveyou.cwlottery.com:443
iloveyou.cwlottery.com:2053
iloveyou.cwlottery.com:2083
iloveyou.cwlottery.com:2087
iloveyou.cwlottery.com:2096
iloveyou.cwlottery.com:8443
blaster.cwlottery.com:80
blaster.cwlottery.com:22
blaster.cwlottery.com:8080
blaster.cwlottery.com:8880
blaster.cwlottery.com:2052
blaster.cwlottery.com:2082
blaster.cwlottery.com:2086
blaster.cwlottery.com:2095
blaster.cwlottery.com:443
blaster.cwlottery.com:2053
blaster.cwlottery.com:2083
blaster.cwlottery.com:2087
blaster.cwlottery.com:2096
blaster.cwlottery.com:8443

Mutex

WimvWbxVyqbQ

Attributes

delay
0
install
true
install_file
z74q5.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
behavioral1/files/0x000a0000000243e0-8.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-1-5-21-540052884-2969440504-464782435-1000\Control Panel\International\Geo\Nation	99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.exe

Executes dropped EXE 2 IoCs

pid	Process
4152	z74q5.exe
4148	z74q5.exe

Outbound SSH connection to public host 2 TTPs 4 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	94	172.67.177.192:22	4152	z74q5.exe
SSH destination	4	104.21.17.180:22	4152	z74q5.exe
SSH destination	39	172.67.177.192:22	4152	z74q5.exe
SSH destination	92	104.21.17.180:22	4152	z74q5.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
3928	cmd.exe
4996	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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	z74q5.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	z74q5.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.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

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4888	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
4376	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
3600	99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.exe
3600	99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.exe
3600	99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.exe
3600	99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.exe
3600	99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.exe
3600	99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.exe
3600	99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.exe
3600	99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.exe
3600	99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.exe
3600	99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.exe
3600	99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.exe
3600	99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.exe
3600	99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.exe
3600	99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.exe
3600	99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.exe
3600	99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.exe
3600	99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.exe
3600	99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.exe
3600	99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.exe
3600	99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.exe
3600	99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.exe
3600	99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.exe
3600	99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3600	99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.exe
Token: SeDebugPrivilege	4152	z74q5.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3600 wrote to memory of 3928	3600	99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.exe	83
PID 3600 wrote to memory of 4996	3600	99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.exe	85
PID 4996 wrote to memory of 4888	4996	cmd.exe	87
PID 3928 wrote to memory of 4376	3928	cmd.exe	88
PID 4996 wrote to memory of 4148	4996	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.exe
"C:\Users\Admin\AppData\Local\Temp\99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3600
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "z74q5" /tr '"C:\Users\Admin\AppData\Roaming\z74q5.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3928
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "z74q5" /tr '"C:\Users\Admin\AppData\Roaming\z74q5.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4376
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp4C37.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4996
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4888
- - C:\Users\Admin\AppData\Roaming\z74q5.exe
    "C:\Users\Admin\AppData\Roaming\z74q5.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4148

C:\Users\Admin\AppData\Roaming\z74q5.exe
"C:\Users\Admin\AppData\Roaming\z74q5.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4152

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

tmp4C37.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp4C37.tmp.bat
Size 149B
SHA256 9d2e4eaf3221f533a9637648f9990c498871b05c5c6595b66782847067eb9876
MD5 107025f7e41496091136e4819b6504c8
SHA1 fd253ac00c8e52ee1c7b669c2cb928262d4f2067
SHA512 28d2c7c7ffa627916cc05d722adf33c6025404e04e8d46696b8a4c617d91bfea57e4954d88238d51f7a0dcb6201f4c593f725d7edd6f743385c40341b7c46bbf
TLSH
T16AC02B4251D5EB4E7A05341316FAD88D91776C2D3F40BF10C344404D2680448F1DA381
MD5 SHA1 SHA512 TLSH

Submit Download

z74q5.exe

Path C:\Users\Admin\AppData\Roaming\z74q5.exe
Size 45KB
SHA256 99aaec1bd6d1e194dbf91cd9eb65a45995be544311364c15b4067e9c54689915
MD5 833f6c10e28ebac5b50be2cd63f6c604
SHA1 4fb51c80775e344da896730fcd7817dc87de283e
SHA512 c312af54b2a1bcf153c02875573f7abadd4ac0b7382460859b232d12e9549d521f4c2f2bd246d9f6476f8c4c624de794a3160090088ecbb78af5db76469d1d2d
SSDEEP 768:wuDWZTpw7bmaWUg3gSk0mo2qlQZTohEaSPImzjb5gX3ihcehW5O1Brg8LBDZMx:wuDWZTpMZSB2N4Ea7m3bWXShGIg8ddMx
TLSH
T1E5232B003BE8C227F2BE4F786CF26145867AF6636603D64D1CC4519B5613FC69A42AFE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3600-0-0x0000000000B00000-0x0000000000B12000-memory.dmp

Download

memory/3600-1-0x0000000002F00000-0x0000000002F10000-memory.dmp

Download

memory/3600-2-0x0000000005560000-0x00000000055FC000-memory.dmp

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memory/4152-10-0x0000000005210000-0x0000000005220000-memory.dmp

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memory/4152-13-0x0000000005210000-0x0000000005220000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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