asyncrat | c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a

General

Target
c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a.exe
Size 45KB
Sample260803-wblwcsxset
SHA256 c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a
MD5 b94e432796d2bace19e906ab11e45215
SHA1 0b402a2d5acde4cd96f29893f16d11e806b7190c
SHA512 1504f4505470cb84c277661f3a7594cd7f073df6659f43e62ffcaf259a9c058ec4a4d15f0340497d7b785bfa762edcb45f5eac410ec774e68995d855930aa1e6
SSDEEP 768:EufspTfzcR6uWUcb+wmo2q94O5QyCBjHSNjPIwzjbEgX3i/EVQSAz1BQq1cBDZsx:EufspTf2g2hO59ESKw3bLXS/EvAZGq19
TLSH
T12B233B0037EC822BF2BE4F7899F26145467EF6633603E5492CC441DB5613FC69A42AEE
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

twosisterstubes.com:80
twosisterstubes.com:22
twosisterstubes.com:8080
twosisterstubes.com:8880
twosisterstubes.com:2052
twosisterstubes.com:2082
twosisterstubes.com:2086
twosisterstubes.com:2095
twosisterstubes.com:443
twosisterstubes.com:2053
twosisterstubes.com:2083
twosisterstubes.com:2087
twosisterstubes.com:2096
twosisterstubes.com:8443
www.twosisterstubes.com:80
www.twosisterstubes.com:22
www.twosisterstubes.com:8080
www.twosisterstubes.com:8880
www.twosisterstubes.com:2052
www.twosisterstubes.com:2082
www.twosisterstubes.com:2086
www.twosisterstubes.com:2095
www.twosisterstubes.com:443
www.twosisterstubes.com:2053
www.twosisterstubes.com:2083
www.twosisterstubes.com:2087
www.twosisterstubes.com:2096
www.twosisterstubes.com:8443
hacker.twosisterstubes.com:80
hacker.twosisterstubes.com:22
hacker.twosisterstubes.com:8080
hacker.twosisterstubes.com:8880
hacker.twosisterstubes.com:2052
hacker.twosisterstubes.com:2082
hacker.twosisterstubes.com:2086
hacker.twosisterstubes.com:2095
hacker.twosisterstubes.com:443
hacker.twosisterstubes.com:2053
hacker.twosisterstubes.com:2083
hacker.twosisterstubes.com:2087
hacker.twosisterstubes.com:2096
hacker.twosisterstubes.com:8443
gootloader.twosisterstubes.com:80
gootloader.twosisterstubes.com:22
gootloader.twosisterstubes.com:8080
gootloader.twosisterstubes.com:8880
gootloader.twosisterstubes.com:2052
gootloader.twosisterstubes.com:2082
gootloader.twosisterstubes.com:2086
gootloader.twosisterstubes.com:2095
gootloader.twosisterstubes.com:443
gootloader.twosisterstubes.com:2053
gootloader.twosisterstubes.com:2083
gootloader.twosisterstubes.com:2087
gootloader.twosisterstubes.com:2096
gootloader.twosisterstubes.com:8443

Mutex

wKBOwQLuzYjo

Attributes

delay
0
install
true
install_file
ohgsb5x.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 2 IoCs

rat

resource	yara_rule
behavioral1/files/0x0013000000024346-8.dat	family_asyncrat
behavioral1/memory/1576-10-0x0000000004F60000-0x0000000004F70000-memory.dmp	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-1-5-21-2937465464-4167303362-2236413517-1000\Control Panel\International\Geo\Nation	c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a.exe

Executes dropped EXE 2 IoCs

pid	Process
1576	ohgsb5x.exe
4660	ohgsb5x.exe

Outbound SSH connection to public host 2 TTPs 2 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	47	172.67.175.110:22	1576	ohgsb5x.exe
SSH destination	51	104.21.17.96:22	1576	ohgsb5x.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
4344	cmd.exe
4360	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	ohgsb5x.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ohgsb5x.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a.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

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4440	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
3848	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
1504	c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a.exe
1504	c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a.exe
1504	c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a.exe
1504	c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a.exe
1504	c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a.exe
1504	c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a.exe
1504	c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a.exe
1504	c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a.exe
1504	c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a.exe
1504	c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a.exe
1504	c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a.exe
1504	c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a.exe
1504	c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a.exe
1504	c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a.exe
1504	c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a.exe
1504	c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a.exe
1504	c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a.exe
1504	c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a.exe
1504	c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a.exe
1504	c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a.exe
1504	c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1504	c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a.exe
Token: SeDebugPrivilege	1576	ohgsb5x.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1504 wrote to memory of 4360	1504	c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a.exe	85
PID 1504 wrote to memory of 4344	1504	c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a.exe	87
PID 4344 wrote to memory of 4440	4344	cmd.exe	89
PID 4360 wrote to memory of 3848	4360	cmd.exe	90
PID 4344 wrote to memory of 4660	4344	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a.exe
"C:\Users\Admin\AppData\Local\Temp\c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1504
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "ohgsb5x" /tr '"C:\Users\Admin\AppData\Roaming\ohgsb5x.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4360
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "ohgsb5x" /tr '"C:\Users\Admin\AppData\Roaming\ohgsb5x.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3848
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5927.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4344
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4440
- - C:\Users\Admin\AppData\Roaming\ohgsb5x.exe
    "C:\Users\Admin\AppData\Roaming\ohgsb5x.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4660

C:\Users\Admin\AppData\Roaming\ohgsb5x.exe
"C:\Users\Admin\AppData\Roaming\ohgsb5x.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1576

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

tmp5927.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp5927.tmp.bat
Size 151B
SHA256 d90fb2ae347a5d0a5d32e5f213937d1a0bb95e70571401ee8aa24594713baf5c
MD5 1feb02d66c4bc4b6310d0c5cd7dd5e50
SHA1 7b41992a3eaeb64dfc66b6a2986fe629be6cadb8
SHA512 41b7ac9a7e907adee87807bb1c06f2355838717b502e5fd0e11955e7fa07a3098e9be8e9d416075985d50c80d040e7b5bdc014088f29b5d47c80f874a8be8bbb
TLSH
T114C02B4265C5FA4F2805141302FAD9CC92726C5A3F80BB40DB0C520F12D0449F8ED383
MD5 SHA1 SHA512 TLSH

Submit Download

ohgsb5x.exe

Path C:\Users\Admin\AppData\Roaming\ohgsb5x.exe
Size 45KB
SHA256 c6492d587853b46d2a5d304c4948798c03129e2260d7bebc6862789a2193545a
MD5 b94e432796d2bace19e906ab11e45215
SHA1 0b402a2d5acde4cd96f29893f16d11e806b7190c
SHA512 1504f4505470cb84c277661f3a7594cd7f073df6659f43e62ffcaf259a9c058ec4a4d15f0340497d7b785bfa762edcb45f5eac410ec774e68995d855930aa1e6
SSDEEP 768:EufspTfzcR6uWUcb+wmo2q94O5QyCBjHSNjPIwzjbEgX3i/EVQSAz1BQq1cBDZsx:EufspTf2g2hO59ESKw3bLXS/EvAZGq19
TLSH
T12B233B0037EC822BF2BE4F7899F26145467EF6633603E5492CC441DB5613FC69A42AEE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1504-0-0x00000000008D0000-0x00000000008E2000-memory.dmp

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memory/1504-1-0x0000000005250000-0x0000000005260000-memory.dmp

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memory/1504-2-0x0000000005300000-0x000000000539C000-memory.dmp

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memory/1576-10-0x0000000004F60000-0x0000000004F70000-memory.dmp

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memory/1576-13-0x0000000004F60000-0x0000000004F70000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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