asyncrat | c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c

General

Target
c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.exe
Size 45KB
Sample260803-kdfxcaef49
SHA256 c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c
MD5 a1dd8824aa09c0bbf95016af5ff2a522
SHA1 218e650faf5afc41a5c9c8e1e5743e98a5c49906
SHA512 f47099fdc0591e5c9ad87fa665844532338ece7541825cfc1c141bb1fa768b34c54a4f6fe19033b64a3b752bba2dfd3981d22664fca0109d6d32338f1de101f0
SSDEEP 768:RuxkJTVmU5EkWUGMKSmo2q11BzwQ/x7PIPKjbxgX3i6KBWNAI1sr2ONBBDZcx:RuxkJTgip2AaFPGb+XSRBWNvC2ON/dcx
TLSH
T115231B003BED867BF2BE4F7898F26145457BF2632603D64D2CC4529B5623FC58A426FA
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

xemsexmy.org:80
xemsexmy.org:22
xemsexmy.org:8080
xemsexmy.org:8880
xemsexmy.org:2052
xemsexmy.org:2082
xemsexmy.org:2086
xemsexmy.org:2095
xemsexmy.org:443
xemsexmy.org:2053
xemsexmy.org:2083
xemsexmy.org:2087
xemsexmy.org:2096
xemsexmy.org:8443
www.xemsexmy.org:80
www.xemsexmy.org:22
www.xemsexmy.org:8080
www.xemsexmy.org:8880
www.xemsexmy.org:2052
www.xemsexmy.org:2082
www.xemsexmy.org:2086
www.xemsexmy.org:2095
www.xemsexmy.org:443
www.xemsexmy.org:2053
www.xemsexmy.org:2083
www.xemsexmy.org:2087
www.xemsexmy.org:2096
www.xemsexmy.org:8443
iloveyou.xemsexmy.org:80
iloveyou.xemsexmy.org:22
iloveyou.xemsexmy.org:8080
iloveyou.xemsexmy.org:8880
iloveyou.xemsexmy.org:2052
iloveyou.xemsexmy.org:2082
iloveyou.xemsexmy.org:2086
iloveyou.xemsexmy.org:2095
iloveyou.xemsexmy.org:443
iloveyou.xemsexmy.org:2053
iloveyou.xemsexmy.org:2083
iloveyou.xemsexmy.org:2087
iloveyou.xemsexmy.org:2096
iloveyou.xemsexmy.org:8443
qbot.xemsexmy.org:80
qbot.xemsexmy.org:22
qbot.xemsexmy.org:8080
qbot.xemsexmy.org:8880
qbot.xemsexmy.org:2052
qbot.xemsexmy.org:2082
qbot.xemsexmy.org:2086
qbot.xemsexmy.org:2095
qbot.xemsexmy.org:443
qbot.xemsexmy.org:2053
qbot.xemsexmy.org:2083
qbot.xemsexmy.org:2087
qbot.xemsexmy.org:2096
qbot.xemsexmy.org:8443

Mutex

r8DJHyjuRlor

Attributes

delay
0
install
true
install_file
5cpzwjoa.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/0x00070000000243f2-8.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-1-5-21-2937465464-4167303362-2236413517-1000\Control Panel\International\Geo\Nation	c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.exe

Executes dropped EXE 2 IoCs

pid	Process
2600	5cpzwjoa.exe
2656	5cpzwjoa.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	93	104.21.32.163:22	2600	5cpzwjoa.exe
SSH destination	101	172.67.152.224:22	2600	5cpzwjoa.exe
SSH destination	32	172.67.152.224:22	2600	5cpzwjoa.exe
SSH destination	49	104.21.32.163:22	2600	5cpzwjoa.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
2196	cmd.exe
4240	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	5cpzwjoa.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5cpzwjoa.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.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
2800	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
3800	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
5084	c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.exe
5084	c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.exe
5084	c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.exe
5084	c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.exe
5084	c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.exe
5084	c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.exe
5084	c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.exe
5084	c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.exe
5084	c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.exe
5084	c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.exe
5084	c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.exe
5084	c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.exe
5084	c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.exe
5084	c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.exe
5084	c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.exe
5084	c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.exe
5084	c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.exe
5084	c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.exe
5084	c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.exe
5084	c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.exe
5084	c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.exe
5084	c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.exe
5084	c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5084	c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.exe
Token: SeDebugPrivilege	2600	5cpzwjoa.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5084 wrote to memory of 2196	5084	c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.exe	88
PID 5084 wrote to memory of 4240	5084	c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.exe	90
PID 4240 wrote to memory of 2800	4240	cmd.exe	92
PID 2196 wrote to memory of 3800	2196	cmd.exe	93
PID 4240 wrote to memory of 2656	4240	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.exe
"C:\Users\Admin\AppData\Local\Temp\c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5084
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "5cpzwjoa" /tr '"C:\Users\Admin\AppData\Roaming\5cpzwjoa.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2196
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "5cpzwjoa" /tr '"C:\Users\Admin\AppData\Roaming\5cpzwjoa.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3800
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp1D37.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4240
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2800
- - C:\Users\Admin\AppData\Roaming\5cpzwjoa.exe
    "C:\Users\Admin\AppData\Roaming\5cpzwjoa.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2656

C:\Users\Admin\AppData\Roaming\5cpzwjoa.exe
"C:\Users\Admin\AppData\Roaming\5cpzwjoa.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2600

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

tmp1D37.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp1D37.tmp.bat
Size 152B
SHA256 c061c97017e5f9973fea90e1c0f4d95c85570edc8a0bce7b1ad662b025d9cc3a
MD5 1bc32c67b7354ff9d4e77cb0597036f3
SHA1 48a5ab59ff4dceddd71bc70f7bc1ae270e68a37e
SHA512 b3df7aca7cf01493428c7a49b5da59cbecc2c8b966118ac232fb647502f61ce4d946fdb7664281dc76d182805ade4c304229971a0e7ab83078394827807cd9cd
TLSH
T121C02BB351CAEA4E2909141306FBD48C91B36C693FC0BB01C748400E728048CF0DE341
MD5 SHA1 SHA512 TLSH

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5cpzwjoa.exe

Path C:\Users\Admin\AppData\Roaming\5cpzwjoa.exe
Size 45KB
SHA256 c3f1ed726efabe0d85816103dc3b4ecf8b1a4094ec28ea2483405d57e041bd3c
MD5 a1dd8824aa09c0bbf95016af5ff2a522
SHA1 218e650faf5afc41a5c9c8e1e5743e98a5c49906
SHA512 f47099fdc0591e5c9ad87fa665844532338ece7541825cfc1c141bb1fa768b34c54a4f6fe19033b64a3b752bba2dfd3981d22664fca0109d6d32338f1de101f0
SSDEEP 768:RuxkJTVmU5EkWUGMKSmo2q11BzwQ/x7PIPKjbxgX3i6KBWNAI1sr2ONBBDZcx:RuxkJTgip2AaFPGb+XSRBWNvC2ON/dcx
TLSH
T115231B003BED867BF2BE4F7898F26145457BF2632603D64D2CC4529B5623FC58A426FA
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/2600-10-0x0000000004960000-0x0000000004970000-memory.dmp

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memory/2600-13-0x0000000004960000-0x0000000004970000-memory.dmp

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memory/5084-0-0x0000000000C60000-0x0000000000C72000-memory.dmp

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memory/5084-1-0x00000000056D0000-0x00000000056E0000-memory.dmp

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memory/5084-2-0x0000000005620000-0x00000000056BC000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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