asyncrat | 324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd

General

Target
324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd.exe
Size 45KB
Sample260804-lfbabagg68
SHA256 324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd
MD5 f7c8e950ea65f54c6deeb379245ba202
SHA1 0716e043e36568eff757bbe3fcb5857f28712043
SHA512 0e2ac4d2b84b415e6382ee813a8f5b9cfcb3c2b340a7225eae6a47a621da11bf6bc4b745493de4db36726d5bd0ffda821550634b9c2f19fdab0438ddb6cd4881
SSDEEP 768:EulCJTHESwgWUK3aGmo2q95dR3aI6OPIuzjb8g73ibhY+YCarroBDZsx:EulCJTHl42mjqb3u3bT7Sba+62dsx
TLSH
T106231B003BE8C12BF1BE4F78A9F26245867AF6673603D58E1C84519B4613FC69A426FD
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
conti.twosisterstubes.com:80
conti.twosisterstubes.com:22
conti.twosisterstubes.com:8080
conti.twosisterstubes.com:8880
conti.twosisterstubes.com:2052
conti.twosisterstubes.com:2082
conti.twosisterstubes.com:2086
conti.twosisterstubes.com:2095
conti.twosisterstubes.com:443
conti.twosisterstubes.com:2053
conti.twosisterstubes.com:2083
conti.twosisterstubes.com:2087
conti.twosisterstubes.com:2096
conti.twosisterstubes.com:8443
blacklotus.twosisterstubes.com:80
blacklotus.twosisterstubes.com:22
blacklotus.twosisterstubes.com:8080
blacklotus.twosisterstubes.com:8880
blacklotus.twosisterstubes.com:2052
blacklotus.twosisterstubes.com:2082
blacklotus.twosisterstubes.com:2086
blacklotus.twosisterstubes.com:2095
blacklotus.twosisterstubes.com:443
blacklotus.twosisterstubes.com:2053
blacklotus.twosisterstubes.com:2083
blacklotus.twosisterstubes.com:2087
blacklotus.twosisterstubes.com:2096
blacklotus.twosisterstubes.com:8443

Mutex

bgLYx9SKH9Ue

Attributes

delay
0
install
true
install_file
ff1b0i.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/0x00090000000004e8-8.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-1-5-21-668679576-120646659-2289335452-1000\Control Panel\International\Geo\Nation	324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd.exe

Executes dropped EXE 2 IoCs

pid	Process
4740	ff1b0i.exe
4752	ff1b0i.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	75	104.21.17.96:22	4740	ff1b0i.exe
SSH destination	80	172.67.175.110:22	4740	ff1b0i.exe
SSH destination	54	104.21.17.96:22	4740	ff1b0i.exe
SSH destination	65	172.67.175.110:22	4740	ff1b0i.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
448	cmd.exe
2764	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	ff1b0i.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ff1b0i.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd.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
1684	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
3944	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
1700	324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd.exe
1700	324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd.exe
1700	324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd.exe
1700	324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd.exe
1700	324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd.exe
1700	324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd.exe
1700	324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd.exe
1700	324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd.exe
1700	324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd.exe
1700	324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd.exe
1700	324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd.exe
1700	324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd.exe
1700	324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd.exe
1700	324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd.exe
1700	324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd.exe
1700	324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd.exe
1700	324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd.exe
1700	324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd.exe
1700	324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd.exe
1700	324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd.exe
1700	324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1700	324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd.exe
Token: SeDebugPrivilege	4740	ff1b0i.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1700 wrote to memory of 448	1700	324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd.exe	84
PID 1700 wrote to memory of 2764	1700	324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd.exe	86
PID 2764 wrote to memory of 1684	2764	cmd.exe	88
PID 448 wrote to memory of 3944	448	cmd.exe	89
PID 2764 wrote to memory of 4752	2764	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd.exe
"C:\Users\Admin\AppData\Local\Temp\324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1700
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "ff1b0i" /tr '"C:\Users\Admin\AppData\Roaming\ff1b0i.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:448
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "ff1b0i" /tr '"C:\Users\Admin\AppData\Roaming\ff1b0i.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3944
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5E57.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2764
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1684
- - C:\Users\Admin\AppData\Roaming\ff1b0i.exe
    "C:\Users\Admin\AppData\Roaming\ff1b0i.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4752

C:\Users\Admin\AppData\Roaming\ff1b0i.exe
"C:\Users\Admin\AppData\Roaming\ff1b0i.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4740

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

tmp5E57.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp5E57.tmp.bat
Size 150B
SHA256 1d7d7f1bb127ce5fe611349bf88fbf8ef71e532a1fb43e1ade063c01b3c0e1d7
MD5 08db067caf10cb1a98bb93229aa3c13e
SHA1 2d0acd7bd3b383111fdb6685b264679f670143df
SHA512 548546f690b4befec7391df5ad4ad6c2f600778dc9e865091f9bbbb8cda03208d91d61aec78392d3a04674da6263fd0b54fe89f4a4758134db18a3a8b95d8730
TLSH
T136C08C4366C5AA0E6805582302BADA8C92626C5A3E84EB108B09500E52C0448F1E9241
MD5 SHA1 SHA512 TLSH

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ff1b0i.exe

Path C:\Users\Admin\AppData\Roaming\ff1b0i.exe
Size 45KB
SHA256 324b77e6079bac63b59772f9f7410ed4f2dfdab6b5488a6c9b03a582ace3d9dd
MD5 f7c8e950ea65f54c6deeb379245ba202
SHA1 0716e043e36568eff757bbe3fcb5857f28712043
SHA512 0e2ac4d2b84b415e6382ee813a8f5b9cfcb3c2b340a7225eae6a47a621da11bf6bc4b745493de4db36726d5bd0ffda821550634b9c2f19fdab0438ddb6cd4881
SSDEEP 768:EulCJTHESwgWUK3aGmo2q95dR3aI6OPIuzjb8g73ibhY+YCarroBDZsx:EulCJTHl42mjqb3u3bT7Sba+62dsx
TLSH
T106231B003BE8C12BF1BE4F78A9F26245867AF6673603D58E1C84519B4613FC69A426FD
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1700-0-0x0000000000310000-0x0000000000322000-memory.dmp

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memory/1700-1-0x0000000004AC0000-0x0000000004AD0000-memory.dmp

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memory/1700-2-0x0000000004B90000-0x0000000004C2C000-memory.dmp

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memory/4740-10-0x0000000004C00000-0x0000000004C10000-memory.dmp

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memory/4740-13-0x0000000004C00000-0x0000000004C10000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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