asyncrat | 9d876214478c66674b08734df4defda7d62bf993edc27ea830b18ca11878a5b7

General

Target
tmph8jycar6.exe
Size 45KB
Sample260602-ktbbsshs8y
SHA256 9d876214478c66674b08734df4defda7d62bf993edc27ea830b18ca11878a5b7
MD5 e7be74e9b9c283a5f4efd67c960b6049
SHA1 da05372f8deb5d0834777f5acc63d9d948e74b05
SHA512 6a849c31df151c1654b2682f4d00dfc714f7cff407615dd3d9c96ac2cd2a65a48f010c99ca5db59d2e850038733b57d77ff6c5f1de502f974ca63edb2d71290d
SSDEEP 768:4uLgZTUAoOSWUYZL8mo2qFd3HO4SNMOPI0azjbRgo3i+017MK6ITBDZbx:4uLgZTUTn2k+JM30a3beoS+0qUdbx
TLSH
T10E232C003BD8812BF1BE4F78A8F26145497AF2633603D64E1CC4529B5B13FC69A526FE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

springfieldrecycling.com:443
springfieldrecycling.com:80
www.springfieldrecycling.com:443
www.springfieldrecycling.com:80
gootloader.springfieldrecycling.com:443
gootloader.springfieldrecycling.com:80
nanocore.springfieldrecycling.com:443
nanocore.springfieldrecycling.com:80

Mutex

YFNyFICeJN40

Attributes

delay
0
install
true
install_file
76d2n.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
behavioral2/files/0x0002000000022cbc-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-1-5-21-3053180483-1881419501-3594244048-1000\Control Panel\International\Geo\Nation	tmph8jycar6.exe

Executes dropped EXE 2 IoCs

pid	Process
3988	76d2n.exe
5752	76d2n.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	76d2n.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	76d2n.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tmph8jycar6.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4276	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
5760	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
3084	tmph8jycar6.exe
3084	tmph8jycar6.exe
3084	tmph8jycar6.exe
3084	tmph8jycar6.exe
3084	tmph8jycar6.exe
3084	tmph8jycar6.exe
3084	tmph8jycar6.exe
3084	tmph8jycar6.exe
3084	tmph8jycar6.exe
3084	tmph8jycar6.exe
3084	tmph8jycar6.exe
3084	tmph8jycar6.exe
3084	tmph8jycar6.exe
3084	tmph8jycar6.exe
3084	tmph8jycar6.exe
3084	tmph8jycar6.exe
3084	tmph8jycar6.exe
3084	tmph8jycar6.exe
3084	tmph8jycar6.exe
3084	tmph8jycar6.exe
3084	tmph8jycar6.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3084	tmph8jycar6.exe
Token: SeDebugPrivilege	3988	76d2n.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3084 wrote to memory of 328	3084	tmph8jycar6.exe	88
PID 3084 wrote to memory of 1700	3084	tmph8jycar6.exe	90
PID 1700 wrote to memory of 4276	1700	cmd.exe	92
PID 328 wrote to memory of 5760	328	cmd.exe	93
PID 1700 wrote to memory of 5752	1700	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\tmph8jycar6.exe
"C:\Users\Admin\AppData\Local\Temp\tmph8jycar6.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3084
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "76d2n" /tr '"C:\Users\Admin\AppData\Roaming\76d2n.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:328
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "76d2n" /tr '"C:\Users\Admin\AppData\Roaming\76d2n.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:5760
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5EF4.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1700
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4276
- - C:\Users\Admin\AppData\Roaming\76d2n.exe
    "C:\Users\Admin\AppData\Roaming\76d2n.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:5752

C:\Users\Admin\AppData\Roaming\76d2n.exe
"C:\Users\Admin\AppData\Roaming\76d2n.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:3988

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tmp5EF4.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp5EF4.tmp.bat
Size 149B
SHA256 4a633fcd99080c3eef6f2ecb22ef103026411e458eb68d07f88952ce4a1ccf26
MD5 c14dc8accad8fd2321257570f0935e96
SHA1 214df3871a2cc81902a70a9ac9da586e96bc1c40
SHA512 e72b7d8497debaff72bdccafc11963f5359b15bd44e543c6d7ce868718ebb2c79e3d91d9cec5ee14de106aac6fca69ab978267b978d1d3d92ed8eeb7fc43c848
TLSH
T1DAC02B4751C5EA4E2C05142312FAD99CB1727C1A3F40BF50C304801F62C0448F0D9345
MD5 SHA1 SHA512 TLSH

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76d2n.exe

Path C:\Users\Admin\AppData\Roaming\76d2n.exe
Size 45KB
SHA256 9d876214478c66674b08734df4defda7d62bf993edc27ea830b18ca11878a5b7
MD5 e7be74e9b9c283a5f4efd67c960b6049
SHA1 da05372f8deb5d0834777f5acc63d9d948e74b05
SHA512 6a849c31df151c1654b2682f4d00dfc714f7cff407615dd3d9c96ac2cd2a65a48f010c99ca5db59d2e850038733b57d77ff6c5f1de502f974ca63edb2d71290d
SSDEEP 768:4uLgZTUAoOSWUYZL8mo2qFd3HO4SNMOPI0azjbRgo3i+017MK6ITBDZbx:4uLgZTUTn2k+JM30a3beoS+0qUdbx
TLSH
T10E232C003BD8812BF1BE4F78A8F26145497AF2633603D64E1CC4529B5B13FC69A526FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3084-0-0x0000000000910000-0x0000000000922000-memory.dmp

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memory/3084-1-0x00000000053D0000-0x00000000053E0000-memory.dmp

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memory/3084-2-0x00000000052D0000-0x000000000536C000-memory.dmp

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memory/3988-10-0x0000000004FA0000-0x0000000004FB0000-memory.dmp

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memory/3988-13-0x0000000004FA0000-0x0000000004FB0000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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