asyncrat | 17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae

General

Target
17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.exe
Size 45KB
Sample260816-vefcbaef47
SHA256 17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae
MD5 d08ad360b2ba89e6bfd4363329f45f7a
SHA1 e90afcb775d32d27af06114783e32f27a50cc1a7
SHA512 8ef1a993b280dff1aa8140348f7558972b36d57b29fd3d14449de89aafb91c32ecebc6db539d85809876f6a47f0fe5764bee731441baf7437416b9c705d17a5c
SSDEEP 768:0u2vpTD4U2ieWUsqfAmo2qjLS7synzuOPIzzjb2gX9iJ9g84USo3FkkBDZ8x:0u2vpTDe+2gSYh3z3bpXM4BHSd8x
TLSH
T1E3233A003BE8822BF2BE4FB49CF26145867AF6636603D5492CC452D75713FC68A526FE
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

e.streamforester.name:80
e.streamforester.name:22
e.streamforester.name:8080
e.streamforester.name:8880
e.streamforester.name:2052
e.streamforester.name:2082
e.streamforester.name:2086
e.streamforester.name:2095
e.streamforester.name:443
e.streamforester.name:2053
e.streamforester.name:2083
e.streamforester.name:2087
e.streamforester.name:2096
e.streamforester.name:8443
www.e.streamforester.name:80
www.e.streamforester.name:22
www.e.streamforester.name:8080
www.e.streamforester.name:8880
www.e.streamforester.name:2052
www.e.streamforester.name:2082
www.e.streamforester.name:2086
www.e.streamforester.name:2095
www.e.streamforester.name:443
www.e.streamforester.name:2053
www.e.streamforester.name:2083
www.e.streamforester.name:2087
www.e.streamforester.name:2096
www.e.streamforester.name:8443
gh0st.e.streamforester.name:80
gh0st.e.streamforester.name:22
gh0st.e.streamforester.name:8080
gh0st.e.streamforester.name:8880
gh0st.e.streamforester.name:2052
gh0st.e.streamforester.name:2082
gh0st.e.streamforester.name:2086
gh0st.e.streamforester.name:2095
gh0st.e.streamforester.name:443
gh0st.e.streamforester.name:2053
gh0st.e.streamforester.name:2083
gh0st.e.streamforester.name:2087
gh0st.e.streamforester.name:2096
gh0st.e.streamforester.name:8443
azorult.e.streamforester.name:80
azorult.e.streamforester.name:22
azorult.e.streamforester.name:8080
azorult.e.streamforester.name:8880
azorult.e.streamforester.name:2052
azorult.e.streamforester.name:2082
azorult.e.streamforester.name:2086
azorult.e.streamforester.name:2095
azorult.e.streamforester.name:443
azorult.e.streamforester.name:2053
azorult.e.streamforester.name:2083
azorult.e.streamforester.name:2087
azorult.e.streamforester.name:2096
azorult.e.streamforester.name:8443
remote.e.streamforester.name:80
remote.e.streamforester.name:22
remote.e.streamforester.name:8080
remote.e.streamforester.name:8880
remote.e.streamforester.name:2052
remote.e.streamforester.name:2082
remote.e.streamforester.name:2086
remote.e.streamforester.name:2095
remote.e.streamforester.name:443
remote.e.streamforester.name:2053
remote.e.streamforester.name:2083
remote.e.streamforester.name:2087
remote.e.streamforester.name:2096
remote.e.streamforester.name:8443

Mutex

S3dd4iOMkzZu

Attributes

delay
0
install
true
install_file
cafx1no.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/0x0008000000024655-8.dat	family_asyncrat
behavioral1/memory/1320-10-0x0000000005840000-0x0000000005850000-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-1-5-21-3053180483-1881419501-3594244048-1000\Control Panel\International\Geo\Nation	17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.exe

Executes dropped EXE 2 IoCs

pid	Process
1320	cafx1no.exe
2404	cafx1no.exe

Outbound SSH connection to public host 2 TTPs 3 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	7	104.26.4.5:22	1320	cafx1no.exe
SSH destination	18	172.67.70.147:22	1320	cafx1no.exe
SSH destination	27	104.26.5.5:22	1320	cafx1no.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
5620	cmd.exe
4012	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	cafx1no.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cafx1no.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3540	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
2868	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4300	17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.exe
4300	17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.exe
4300	17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.exe
4300	17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.exe
4300	17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.exe
4300	17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.exe
4300	17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.exe
4300	17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.exe
4300	17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.exe
4300	17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.exe
4300	17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.exe
4300	17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.exe
4300	17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.exe
4300	17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.exe
4300	17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.exe
4300	17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.exe
4300	17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.exe
4300	17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.exe
4300	17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.exe
4300	17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.exe
4300	17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.exe
4300	17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.exe
4300	17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4300	17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.exe
Token: SeDebugPrivilege	1320	cafx1no.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4300 wrote to memory of 5620	4300	17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.exe	87
PID 4300 wrote to memory of 4012	4300	17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.exe	89
PID 4012 wrote to memory of 3540	4012	cmd.exe	91
PID 5620 wrote to memory of 2868	5620	cmd.exe	92
PID 4012 wrote to memory of 2404	4012	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.exe
"C:\Users\Admin\AppData\Local\Temp\17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4300
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "cafx1no" /tr '"C:\Users\Admin\AppData\Roaming\cafx1no.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5620
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "cafx1no" /tr '"C:\Users\Admin\AppData\Roaming\cafx1no.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2868
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpFB48.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4012
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3540
- - C:\Users\Admin\AppData\Roaming\cafx1no.exe
    "C:\Users\Admin\AppData\Roaming\cafx1no.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2404

C:\Users\Admin\AppData\Roaming\cafx1no.exe
"C:\Users\Admin\AppData\Roaming\cafx1no.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1320

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

tmpFB48.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpFB48.tmp.bat
Size 151B
SHA256 2a612b0c964045cd9c9547cc937b2bdb8ca09673a7c9e01961ed845bcde4c5a5
MD5 834e990a2f0cd7a9527384905e0015e4
SHA1 ed18623d99a28edc3305f6d71b0edb0d533e7e38
SHA512 8c33035cb7e4c06b66841de59a99ba1ae3cba704ae091111f2668c4848e85735eaeb9d1a71713956829d03c668db83ca1e71f05e091694bb881858381c97a0c0
TLSH
T17AC02B4261C7FE0E2806282313FAD88DA1B67C993F40BF50D704844D568044CF0DD381
MD5 SHA1 SHA512 TLSH

Submit Download

cafx1no.exe

Path C:\Users\Admin\AppData\Roaming\cafx1no.exe
Size 45KB
SHA256 17c6d19030a7b8ab395ffd1067ee0581bba97aa9288e0392ea8f5b6c6a919fae
MD5 d08ad360b2ba89e6bfd4363329f45f7a
SHA1 e90afcb775d32d27af06114783e32f27a50cc1a7
SHA512 8ef1a993b280dff1aa8140348f7558972b36d57b29fd3d14449de89aafb91c32ecebc6db539d85809876f6a47f0fe5764bee731441baf7437416b9c705d17a5c
SSDEEP 768:0u2vpTD4U2ieWUsqfAmo2qjLS7synzuOPIzzjb2gX9iJ9g84USo3FkkBDZ8x:0u2vpTDe+2gSYh3z3bpXM4BHSd8x
TLSH
T1E3233A003BE8822BF2BE4FB49CF26145867AF6636603D5492CC452D75713FC68A526FE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1320-10-0x0000000005840000-0x0000000005850000-memory.dmp

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memory/1320-13-0x0000000005840000-0x0000000005850000-memory.dmp

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memory/4300-0-0x0000000000620000-0x0000000000632000-memory.dmp

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memory/4300-1-0x0000000005070000-0x0000000005080000-memory.dmp

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memory/4300-2-0x0000000005080000-0x000000000511C000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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