asyncrat | 8fbadef4be0afd8cf08d6e84e860d422361bf9f08580dbe0d5271613872a16a7

General

Target
tmp3kqn31z2.exe
Size 45KB
Sample260602-klmpvsg15v
SHA256 8fbadef4be0afd8cf08d6e84e860d422361bf9f08580dbe0d5271613872a16a7
MD5 0141577730903c49ade2ddc000c2f8be
SHA1 750a952429909761c03aa1cf0247b6a6481a7542
SHA512 af9ad1833430d527a523b7885f024467b2e773b816a0196771d139fa7e6a8be46aa04373dc9699dba8feb5679f4d520827561801d14d6c5c074593c2346b515c
SSDEEP 768:Bupk9Tx5PWZZWUvfyRmo2qgzQLDivyvtAjZPI7zjbGgLicys6EkOSf7bqtTJn7N9:Bupk9TxtOO2H2iaGjW73bZGc2bQTJn77
TLSH
T1E0232B0037E9812BF2BE4F7898F26245867AF6773603D5491CC451DB5A23FC68A426FE
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

sexphude.pro:443
sexphude.pro:80
sexphude.pro:7797
sexphude.pro:8707
sexphude.pro:6620
www.sexphude.pro:443
www.sexphude.pro:80
www.sexphude.pro:7797
www.sexphude.pro:8707
www.sexphude.pro:6620
blacklotus.sexphude.pro:443
blacklotus.sexphude.pro:80
blacklotus.sexphude.pro:7797
blacklotus.sexphude.pro:8707
blacklotus.sexphude.pro:6620
malware.sexphude.pro:443
malware.sexphude.pro:80
malware.sexphude.pro:7797
malware.sexphude.pro:8707
malware.sexphude.pro:6620

Mutex

VWkXLWQ6UNQn

Attributes

delay
0
install
true
install_file
8cmn.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
behavioral2/files/0x0009000000024203-8.dat	family_asyncrat
behavioral2/memory/464-10-0x0000000005840000-0x0000000005850000-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-1-5-21-876885714-46325919-1482798410-1000\Control Panel\International\Geo\Nation	tmp3kqn31z2.exe

Executes dropped EXE 2 IoCs

pid	Process
464	8cmn.exe
1756	8cmn.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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8cmn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8cmn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tmp3kqn31z2.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
3352	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
2976	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4844	tmp3kqn31z2.exe
4844	tmp3kqn31z2.exe
4844	tmp3kqn31z2.exe
4844	tmp3kqn31z2.exe
4844	tmp3kqn31z2.exe
4844	tmp3kqn31z2.exe
4844	tmp3kqn31z2.exe
4844	tmp3kqn31z2.exe
4844	tmp3kqn31z2.exe
4844	tmp3kqn31z2.exe
4844	tmp3kqn31z2.exe
4844	tmp3kqn31z2.exe
4844	tmp3kqn31z2.exe
4844	tmp3kqn31z2.exe
4844	tmp3kqn31z2.exe
4844	tmp3kqn31z2.exe
4844	tmp3kqn31z2.exe
4844	tmp3kqn31z2.exe
4844	tmp3kqn31z2.exe
4844	tmp3kqn31z2.exe
4844	tmp3kqn31z2.exe
4844	tmp3kqn31z2.exe
4844	tmp3kqn31z2.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4844	tmp3kqn31z2.exe
Token: SeDebugPrivilege	464	8cmn.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4844 wrote to memory of 2748	4844	tmp3kqn31z2.exe	90
PID 4844 wrote to memory of 1344	4844	tmp3kqn31z2.exe	92
PID 1344 wrote to memory of 3352	1344	cmd.exe	94
PID 2748 wrote to memory of 2976	2748	cmd.exe	95
PID 1344 wrote to memory of 1756	1344	cmd.exe	100

C:\Users\Admin\AppData\Local\Temp\tmp3kqn31z2.exe
"C:\Users\Admin\AppData\Local\Temp\tmp3kqn31z2.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4844
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "8cmn" /tr '"C:\Users\Admin\AppData\Roaming\8cmn.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2748
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "8cmn" /tr '"C:\Users\Admin\AppData\Roaming\8cmn.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2976
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp3B3F.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1344
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3352
- - C:\Users\Admin\AppData\Roaming\8cmn.exe
    "C:\Users\Admin\AppData\Roaming\8cmn.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1756

C:\Users\Admin\AppData\Roaming\8cmn.exe
"C:\Users\Admin\AppData\Roaming\8cmn.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:464

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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tmp3B3F.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp3B3F.tmp.bat
Size 148B
SHA256 8eab186fe7ca25f76480ba5a40c460ba52a6be814ff069e408936918b29d10b1
MD5 786fe6aa53200651ed7dc5cbf3cda671
SHA1 51d083533d79bc39933f129ac8867d8a332ea187
SHA512 f6dbc8962052c437c0ee1b1e8146a4d7fbc66d6f023d83a2a51b3b801c42c40f5fd07d6dc1f75e528aa80ff51ce0207c8973553db958f232eb4938a6ec3501b4
TLSH
T104C02B4352C5FE0E3C49142312FAD49D91736C1D3F80BF00C304401D62C0849F0E9345
MD5 SHA1 SHA512 TLSH

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8cmn.exe

Path C:\Users\Admin\AppData\Roaming\8cmn.exe
Size 45KB
SHA256 8fbadef4be0afd8cf08d6e84e860d422361bf9f08580dbe0d5271613872a16a7
MD5 0141577730903c49ade2ddc000c2f8be
SHA1 750a952429909761c03aa1cf0247b6a6481a7542
SHA512 af9ad1833430d527a523b7885f024467b2e773b816a0196771d139fa7e6a8be46aa04373dc9699dba8feb5679f4d520827561801d14d6c5c074593c2346b515c
SSDEEP 768:Bupk9Tx5PWZZWUvfyRmo2qgzQLDivyvtAjZPI7zjbGgLicys6EkOSf7bqtTJn7N9:Bupk9TxtOO2H2iaGjW73bZGc2bQTJn77
TLSH
T1E0232B0037E9812BF2BE4F7898F26245867AF6773603D5491CC451DB5A23FC68A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/464-10-0x0000000005840000-0x0000000005850000-memory.dmp

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memory/464-13-0x0000000005840000-0x0000000005850000-memory.dmp

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memory/4844-0-0x00000000001D0000-0x00000000001E2000-memory.dmp

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memory/4844-1-0x0000000004A10000-0x0000000004A20000-memory.dmp

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memory/4844-2-0x0000000004AC0000-0x0000000004B5C000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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