asyncrat | 299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813

General

Target
299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe
Size 45KB
Sample260718-v3cw4agy6j
SHA256 299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813
MD5 7521dcc21fa12903aacdd1df1d818552
SHA1 60ad1ef536d74cd1f784976bbc0720ccb53a9237
SHA512 997d1f62848a9ba0fb4b57b6493a2d612b6b07cc75617f41dbdc49707c48a4fe5ef3948c1e2b6cbda7e4863fd9f9bef520a3cb3b41670087636db779be83fa2b
SSDEEP 768:MuBGJTP0BQ0UWUWHaimo2qVyLiE02FjMdjYkkmPIbzjbhgX3iyR/2cEgR5uEBDZG:MuBGJTPho2/L9wQPb3bOXSypd7HdEx
TLSH
T129232B003BE9812BF2BE4F7868F26145867AF6732603D64A1CC451DB5A13FC59A42AFD
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

dagatructiep.sh:80
dagatructiep.sh:22
dagatructiep.sh:8080
dagatructiep.sh:8880
dagatructiep.sh:2052
dagatructiep.sh:2082
dagatructiep.sh:2086
dagatructiep.sh:2095
dagatructiep.sh:443
dagatructiep.sh:2053
dagatructiep.sh:2083
dagatructiep.sh:2087
dagatructiep.sh:2096
dagatructiep.sh:8443
www.dagatructiep.sh:80
www.dagatructiep.sh:22
www.dagatructiep.sh:8080
www.dagatructiep.sh:8880
www.dagatructiep.sh:2052
www.dagatructiep.sh:2082
www.dagatructiep.sh:2086
www.dagatructiep.sh:2095
www.dagatructiep.sh:443
www.dagatructiep.sh:2053
www.dagatructiep.sh:2083
www.dagatructiep.sh:2087
www.dagatructiep.sh:2096
www.dagatructiep.sh:8443
malware.dagatructiep.sh:80
malware.dagatructiep.sh:22
malware.dagatructiep.sh:8080
malware.dagatructiep.sh:8880
malware.dagatructiep.sh:2052
malware.dagatructiep.sh:2082
malware.dagatructiep.sh:2086
malware.dagatructiep.sh:2095
malware.dagatructiep.sh:443
malware.dagatructiep.sh:2053
malware.dagatructiep.sh:2083
malware.dagatructiep.sh:2087
malware.dagatructiep.sh:2096
malware.dagatructiep.sh:8443
cl0p.dagatructiep.sh:80
cl0p.dagatructiep.sh:22
cl0p.dagatructiep.sh:8080
cl0p.dagatructiep.sh:8880
cl0p.dagatructiep.sh:2052
cl0p.dagatructiep.sh:2082
cl0p.dagatructiep.sh:2086
cl0p.dagatructiep.sh:2095
cl0p.dagatructiep.sh:443
cl0p.dagatructiep.sh:2053
cl0p.dagatructiep.sh:2083
cl0p.dagatructiep.sh:2087
cl0p.dagatructiep.sh:2096
cl0p.dagatructiep.sh:8443
hack.dagatructiep.sh:80
hack.dagatructiep.sh:22
hack.dagatructiep.sh:8080
hack.dagatructiep.sh:8880
hack.dagatructiep.sh:2052
hack.dagatructiep.sh:2082
hack.dagatructiep.sh:2086
hack.dagatructiep.sh:2095
hack.dagatructiep.sh:443
hack.dagatructiep.sh:2053
hack.dagatructiep.sh:2083
hack.dagatructiep.sh:2087
hack.dagatructiep.sh:2096
hack.dagatructiep.sh:8443

Mutex

QHqVCgNcyj9n

Attributes

delay
0
install
true
install_file
aei4.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/0x000c000000024319-8.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-1-5-21-1074038928-2032447174-945360078-1000\Control Panel\International\Geo\Nation	299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe

Executes dropped EXE 2 IoCs

pid	Process
4564	aei4.exe
4148	aei4.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
2408	cmd.exe
2540	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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	aei4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	aei4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3520	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
2904	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
1764	299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe
1764	299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe
1764	299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe
1764	299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe
1764	299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe
1764	299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe
1764	299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe
1764	299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe
1764	299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe
1764	299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe
1764	299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe
1764	299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe
1764	299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe
1764	299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe
1764	299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe
1764	299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe
1764	299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe
1764	299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe
1764	299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe
1764	299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe
1764	299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe
1764	299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe
1764	299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1764	299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe
Token: SeDebugPrivilege	4564	aei4.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1764 wrote to memory of 2408	1764	299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe	86
PID 1764 wrote to memory of 2540	1764	299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe	88
PID 2540 wrote to memory of 3520	2540	cmd.exe	90
PID 2408 wrote to memory of 2904	2408	cmd.exe	91
PID 2540 wrote to memory of 4148	2540	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe
"C:\Users\Admin\AppData\Local\Temp\299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1764
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "aei4" /tr '"C:\Users\Admin\AppData\Roaming\aei4.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2408
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "aei4" /tr '"C:\Users\Admin\AppData\Roaming\aei4.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2904
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp23D.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2540
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3520
- - C:\Users\Admin\AppData\Roaming\aei4.exe
    "C:\Users\Admin\AppData\Roaming\aei4.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4148

C:\Users\Admin\AppData\Roaming\aei4.exe
"C:\Users\Admin\AppData\Roaming\aei4.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4564

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

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

tmp23D.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp23D.tmp.bat
Size 147B
SHA256 a7c2b3f97da8e1a7af4d763a9948452342bb2448041db979480da63474c45c22
MD5 f3cc4cccdf65b9511ca399a16745b68a
SHA1 8d38510e0bdcb7b0ff0664f6683f0c0d7064e54c
SHA512 9a70d16ad3e38f35a7b933921a413008d818b537a08a13d6e2c7001a2098ea216c9610c598a5f962d78755f3af4f0276fd566bf241558d28bc81dc8243b49987
TLSH
T192C02B42A1C7EA6E6906141302FED49C91B36C5D3F40BB00C308405D2680589F0D9345
MD5 SHA1 SHA512 TLSH

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aei4.exe

Path C:\Users\Admin\AppData\Roaming\aei4.exe
Size 45KB
SHA256 299f4c105bd6c0e4f6a56c8d5f26e834ff7b331229cc326b2c0e08460f1cc813
MD5 7521dcc21fa12903aacdd1df1d818552
SHA1 60ad1ef536d74cd1f784976bbc0720ccb53a9237
SHA512 997d1f62848a9ba0fb4b57b6493a2d612b6b07cc75617f41dbdc49707c48a4fe5ef3948c1e2b6cbda7e4863fd9f9bef520a3cb3b41670087636db779be83fa2b
SSDEEP 768:MuBGJTP0BQ0UWUWHaimo2qVyLiE02FjMdjYkkmPIbzjbhgX3iyR/2cEgR5uEBDZG:MuBGJTPho2/L9wQPb3bOXSypd7HdEx
TLSH
T129232B003BE9812BF2BE4F7868F26145867AF6732603D64A1CC451DB5A13FC59A42AFD
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1764-0-0x00000000005F0000-0x0000000000602000-memory.dmp

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memory/1764-1-0x0000000005000000-0x0000000005010000-memory.dmp

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memory/1764-2-0x0000000004EC0000-0x0000000004F5C000-memory.dmp

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memory/4564-10-0x0000000005200000-0x0000000005210000-memory.dmp

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memory/4564-13-0x0000000005200000-0x0000000005210000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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