asyncrat | 909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6

General

Target
909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.exe
Size 45KB
Sample260801-qe5jzsbm21
SHA256 909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6
MD5 11ebd918698d24c12188bbc7c22c2e68
SHA1 106e70ecc7e3537be63595641f9c4931934c103b
SHA512 089b1aac32ac5f8bf5f476c66a6254d90b02e45122440c63087c0cc42289c29631a5f26e23d5b16896037d3d791cbaf1664f76a167958e8634d214e698e7c4b5
SSDEEP 768:5udApTNctooWUS7C+mo2qtbx1HJhOPIcozjbYgv3iuNPihYylBDZ0x:5udApTNmU2cFj3co3bPvSHhPrd0x
TLSH
T1D0232B0037E8822BF2BE4F7898F26145867AF6673A03D58E1CC451DB5613FC69A426FD
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

sextinvl.blog:80
sextinvl.blog:22
sextinvl.blog:8080
sextinvl.blog:8880
sextinvl.blog:2052
sextinvl.blog:2082
sextinvl.blog:2086
sextinvl.blog:2095
sextinvl.blog:443
sextinvl.blog:2053
sextinvl.blog:2083
sextinvl.blog:2087
sextinvl.blog:2096
sextinvl.blog:8443
www.sextinvl.blog:80
www.sextinvl.blog:22
www.sextinvl.blog:8080
www.sextinvl.blog:8880
www.sextinvl.blog:2052
www.sextinvl.blog:2082
www.sextinvl.blog:2086
www.sextinvl.blog:2095
www.sextinvl.blog:443
www.sextinvl.blog:2053
www.sextinvl.blog:2083
www.sextinvl.blog:2087
www.sextinvl.blog:2096
www.sextinvl.blog:8443
hacker.sextinvl.blog:80
hacker.sextinvl.blog:22
hacker.sextinvl.blog:8080
hacker.sextinvl.blog:8880
hacker.sextinvl.blog:2052
hacker.sextinvl.blog:2082
hacker.sextinvl.blog:2086
hacker.sextinvl.blog:2095
hacker.sextinvl.blog:443
hacker.sextinvl.blog:2053
hacker.sextinvl.blog:2083
hacker.sextinvl.blog:2087
hacker.sextinvl.blog:2096
hacker.sextinvl.blog:8443
conficker.sextinvl.blog:80
conficker.sextinvl.blog:22
conficker.sextinvl.blog:8080
conficker.sextinvl.blog:8880
conficker.sextinvl.blog:2052
conficker.sextinvl.blog:2082
conficker.sextinvl.blog:2086
conficker.sextinvl.blog:2095
conficker.sextinvl.blog:443
conficker.sextinvl.blog:2053
conficker.sextinvl.blog:2083
conficker.sextinvl.blog:2087
conficker.sextinvl.blog:2096
conficker.sextinvl.blog:8443

Mutex

Sw4c1OEVVTcY

Attributes

delay
0
install
true
install_file
pm53an.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/0x0008000000024682-8.dat	family_asyncrat
behavioral1/memory/2648-10-0x0000000004970000-0x0000000004980000-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-1-5-21-668679576-120646659-2289335452-1000\Control Panel\International\Geo\Nation	909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.exe

Executes dropped EXE 2 IoCs

pid	Process
2648	pm53an.exe
4452	pm53an.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	65	104.21.27.116:22	2648	pm53an.exe
SSH destination	71	172.67.169.65:22	2648	pm53an.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
4104	cmd.exe
2236	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pm53an.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pm53an.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.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
4716	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
2104	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4600	909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.exe
4600	909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.exe
4600	909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.exe
4600	909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.exe
4600	909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.exe
4600	909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.exe
4600	909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.exe
4600	909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.exe
4600	909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.exe
4600	909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.exe
4600	909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.exe
4600	909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.exe
4600	909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.exe
4600	909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.exe
4600	909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.exe
4600	909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.exe
4600	909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.exe
4600	909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.exe
4600	909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.exe
4600	909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.exe
4600	909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.exe
4600	909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.exe
4600	909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4600	909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.exe
Token: SeDebugPrivilege	2648	pm53an.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4600 wrote to memory of 2236	4600	909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.exe	88
PID 4600 wrote to memory of 4104	4600	909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.exe	90
PID 4104 wrote to memory of 4716	4104	cmd.exe	92
PID 2236 wrote to memory of 2104	2236	cmd.exe	93
PID 4104 wrote to memory of 4452	4104	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.exe
"C:\Users\Admin\AppData\Local\Temp\909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4600
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "pm53an" /tr '"C:\Users\Admin\AppData\Roaming\pm53an.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2236
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "pm53an" /tr '"C:\Users\Admin\AppData\Roaming\pm53an.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2104
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8160.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4104
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4716
- - C:\Users\Admin\AppData\Roaming\pm53an.exe
    "C:\Users\Admin\AppData\Roaming\pm53an.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4452

C:\Users\Admin\AppData\Roaming\pm53an.exe
"C:\Users\Admin\AppData\Roaming\pm53an.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2648

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

tmp8160.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp8160.tmp.bat
Size 150B
SHA256 7fd1384123624c4cab3bcd7ccd6afd5a87d926718e892aa130388c4e8267fc46
MD5 93c652ac84c73c8104ace6055439a88c
SHA1 8e44a19d9b860579c32088b284d1deee18781578
SHA512 8406cf83421ef0776fb1377fc0f40e8b34442223a815f1cda777d37e5a5571a53d9756ed4c26e55f5c715615db63c2adfdc1d76d9eec3dbd5aab104f8b10bd63
TLSH
T1ACC08C6251C5AA0E2C05682312BAE88DA26268593E40AB008348409912C0458E499246
MD5 SHA1 SHA512 TLSH

Submit Download

pm53an.exe

Path C:\Users\Admin\AppData\Roaming\pm53an.exe
Size 45KB
SHA256 909b01db3ef84d6dc623c30aa45acbd5129c62814880161058453379079ae3f6
MD5 11ebd918698d24c12188bbc7c22c2e68
SHA1 106e70ecc7e3537be63595641f9c4931934c103b
SHA512 089b1aac32ac5f8bf5f476c66a6254d90b02e45122440c63087c0cc42289c29631a5f26e23d5b16896037d3d791cbaf1664f76a167958e8634d214e698e7c4b5
SSDEEP 768:5udApTNctooWUS7C+mo2qtbx1HJhOPIcozjbYgv3iuNPihYylBDZ0x:5udApTNmU2cFj3co3bPvSHhPrd0x
TLSH
T1D0232B0037E8822BF2BE4F7898F26145867AF6673A03D58E1CC451DB5613FC69A426FD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2648-10-0x0000000004970000-0x0000000004980000-memory.dmp

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memory/2648-13-0x0000000004970000-0x0000000004980000-memory.dmp

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memory/4600-0-0x0000000000490000-0x00000000004A2000-memory.dmp

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memory/4600-1-0x00000000029D0000-0x00000000029E0000-memory.dmp

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memory/4600-2-0x0000000004F00000-0x0000000004F9C000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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