asyncrat | 9133d1e1840eba05fd58c6196597ac684b1a429cc7cef55d0c426609f58255c0

General

Target

e24708d6b2a36fa08513d08c801ded10N.exe
Size

979KB
MD5

e24708d6b2a36fa08513d08c801ded10
SHA1

bd79ca2abafb41a481def361ede0567ca923f630
SHA256

9133d1e1840eba05fd58c6196597ac684b1a429cc7cef55d0c426609f58255c0
SHA512

622ef04aa8e7f1e3c331293a853300f166b3c8bfc508ee0e49c25806761c3ddb1306752f68c9640aed25f9a77e1304ab1d19a5f25fcf9cdd8904be1c9d618699
SSDEEP

12288:aZcNmVoRehM8BrRpM2OkPtFqIoF1JP3rpMJJNRsVzKnUekzn5nf7DPWHP+alL0Wl:bXRehM2pOcqLj1M3DWKUe453PWv7jWk

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.6D

Botnet

Default

C2

seznam.zapto.org:6606

seznam.zapto.org:7707

seznam.zapto.org:8808

ronymahmoud.casacam.net:6606

ronymahmoud.casacam.net:7707

ronymahmoud.casacam.net:8808

Mutex

tpfypmaupoo

Attributes

delay
8
install
true
install_file
defander.exe
install_folder
%AppData%

aes.plain

Signatures

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/memory/4048-11-0x0000000008610000-0x0000000008622000-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-1-5-21-2990742725-2267136959-192470804-1000\Control Panel\International\Geo\Nation	e24708d6b2a36fa08513d08c801ded10N.exe

Executes dropped EXE 1 IoCs

pid	Process
5112	defander.exe

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

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2412	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
812	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4048	e24708d6b2a36fa08513d08c801ded10N.exe
4048	e24708d6b2a36fa08513d08c801ded10N.exe
4048	e24708d6b2a36fa08513d08c801ded10N.exe
4048	e24708d6b2a36fa08513d08c801ded10N.exe
4048	e24708d6b2a36fa08513d08c801ded10N.exe
4048	e24708d6b2a36fa08513d08c801ded10N.exe
4048	e24708d6b2a36fa08513d08c801ded10N.exe
4048	e24708d6b2a36fa08513d08c801ded10N.exe
4048	e24708d6b2a36fa08513d08c801ded10N.exe
4048	e24708d6b2a36fa08513d08c801ded10N.exe
4048	e24708d6b2a36fa08513d08c801ded10N.exe
4048	e24708d6b2a36fa08513d08c801ded10N.exe
4048	e24708d6b2a36fa08513d08c801ded10N.exe
4048	e24708d6b2a36fa08513d08c801ded10N.exe
4048	e24708d6b2a36fa08513d08c801ded10N.exe
4048	e24708d6b2a36fa08513d08c801ded10N.exe
4048	e24708d6b2a36fa08513d08c801ded10N.exe
4048	e24708d6b2a36fa08513d08c801ded10N.exe
4048	e24708d6b2a36fa08513d08c801ded10N.exe
4048	e24708d6b2a36fa08513d08c801ded10N.exe
4048	e24708d6b2a36fa08513d08c801ded10N.exe
4048	e24708d6b2a36fa08513d08c801ded10N.exe
4048	e24708d6b2a36fa08513d08c801ded10N.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4048	e24708d6b2a36fa08513d08c801ded10N.exe
Token: SeDebugPrivilege	5112	defander.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4048 wrote to memory of 1960	4048	e24708d6b2a36fa08513d08c801ded10N.exe	93
PID 4048 wrote to memory of 1960	4048	e24708d6b2a36fa08513d08c801ded10N.exe	93
PID 4048 wrote to memory of 1960	4048	e24708d6b2a36fa08513d08c801ded10N.exe	93
PID 4048 wrote to memory of 3188	4048	e24708d6b2a36fa08513d08c801ded10N.exe	95
PID 4048 wrote to memory of 3188	4048	e24708d6b2a36fa08513d08c801ded10N.exe	95
PID 4048 wrote to memory of 3188	4048	e24708d6b2a36fa08513d08c801ded10N.exe	95
PID 1960 wrote to memory of 812	1960	cmd.exe	97
PID 1960 wrote to memory of 812	1960	cmd.exe	97
PID 1960 wrote to memory of 812	1960	cmd.exe	97
PID 3188 wrote to memory of 2412	3188	cmd.exe	98
PID 3188 wrote to memory of 2412	3188	cmd.exe	98
PID 3188 wrote to memory of 2412	3188	cmd.exe	98
PID 3188 wrote to memory of 5112	3188	cmd.exe	100
PID 3188 wrote to memory of 5112	3188	cmd.exe	100
PID 3188 wrote to memory of 5112	3188	cmd.exe	100

C:\Users\Admin\AppData\Local\Temp\e24708d6b2a36fa08513d08c801ded10N.exe
"C:\Users\Admin\AppData\Local\Temp\e24708d6b2a36fa08513d08c801ded10N.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4048
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /ru system /rl highest /tn e24708d6b2a36fa08513d08c801ded10N /tr '"C:\Users\Admin\AppData\Roaming\defander.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1960
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /ru system /rl highest /tn e24708d6b2a36fa08513d08c801ded10N /tr '"C:\Users\Admin\AppData\Roaming\defander.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:812
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpAC8C.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3188
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2412
- - C:\Users\Admin\AppData\Roaming\defander.exe
    "C:\Users\Admin\AppData\Roaming\defander.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:5112

Network

MITRE ATT&CK Enterprise v15

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpAC8C.tmp.bat

Filesize
152B

MD5
c5562377e64706ff01153c56d4ec89ee

SHA1
bf549cac791c9898e656dc2ec67f54527c2c5163

SHA256
6ae3cca43225c02766b1fb1c5a9cd0037a48d4e9dfb216bd026431431206c3f7

SHA512
93dc9017e9777e8c8d309da9f5102ddec0ce7ae91489a90d09cde517ae0fc3eb2b61c17c3ddc07b01c0ce71869ab63a91613248e800ea703b0db8adc415c89c7

Download Submit
C:\Users\Admin\AppData\Roaming\defander.exe

Filesize
979KB

MD5
e24708d6b2a36fa08513d08c801ded10

SHA1
bd79ca2abafb41a481def361ede0567ca923f630

SHA256
9133d1e1840eba05fd58c6196597ac684b1a429cc7cef55d0c426609f58255c0

SHA512
622ef04aa8e7f1e3c331293a853300f166b3c8bfc508ee0e49c25806761c3ddb1306752f68c9640aed25f9a77e1304ab1d19a5f25fcf9cdd8904be1c9d618699

Download Submit
memory/4048-8-0x00000000061F0000-0x0000000006396000-memory.dmp

Filesize
1.6MB

Download
memory/4048-11-0x0000000008610000-0x0000000008622000-memory.dmp

Filesize
72KB

Download
memory/4048-4-0x00000000057D0000-0x000000000586C000-memory.dmp

Filesize
624KB

Download
memory/4048-5-0x00000000056E0000-0x00000000056EA000-memory.dmp

Filesize
40KB

Download
memory/4048-6-0x0000000075230000-0x00000000759E0000-memory.dmp

Filesize
7.7MB

Download
memory/4048-7-0x0000000005A20000-0x0000000005A76000-memory.dmp

Filesize
344KB

Download
memory/4048-0-0x000000007523E000-0x000000007523F000-memory.dmp

Filesize
4KB

Download
memory/4048-9-0x0000000006CF0000-0x0000000006D84000-memory.dmp

Filesize
592KB

Download
memory/4048-10-0x0000000075230000-0x00000000759E0000-memory.dmp

Filesize
7.7MB

Download
memory/4048-3-0x0000000005730000-0x00000000057C2000-memory.dmp

Filesize
584KB

Download
memory/4048-16-0x0000000075230000-0x00000000759E0000-memory.dmp

Filesize
7.7MB

Download
memory/4048-2-0x0000000005C40000-0x00000000061E4000-memory.dmp

Filesize
5.6MB

Download
memory/4048-1-0x0000000000BF0000-0x0000000000CEA000-memory.dmp

Filesize
1000KB

Download
memory/5112-21-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/5112-22-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/5112-25-0x0000000009080000-0x00000000090E6000-memory.dmp

Filesize
408KB

Download
memory/5112-26-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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