asyncrat | 93e9e60b2642385ba3972dde3db83f404ede759b98e85465e962b040a81920af

General

Target

c89f06207619b46aff5d7d3824f315d0N.exe
Size

40KB
MD5

c89f06207619b46aff5d7d3824f315d0
SHA1

e5253820c444920bc4ab49f67a50a65c0e725e67
SHA256

93e9e60b2642385ba3972dde3db83f404ede759b98e85465e962b040a81920af
SHA512

edba8543774ed2c22796adb41b02228ea7c33dac0c877f4274cac8553a5e08d1d41c45c3738f975e55f1b8ffb92c23ce27dc274a2ecf6abb9860ea6dd0617650
SSDEEP

768:BWRs92Ry5MfORJRRoQMq0X/eVgqGHBVlC1kqECUV8ix:QRwzmWRnjq3lbCqx

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

http://rconhomne.ddns.net/:6606

http://rconhomne.ddns.net/:7707

http://rconhomne.ddns.net/:8808

Mutex

INto6wUrRcnC

Attributes

delay
60
install
true
install_file
$77system.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/4632-2-0x00000000058C0000-0x00000000058D2000-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-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation	c89f06207619b46aff5d7d3824f315d0N.exe

Executes dropped EXE 1 IoCs

pid	Process
2216	$77system.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 6 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	c89f06207619b46aff5d7d3824f315d0N.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	$77system.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2308	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
4308	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
4632	c89f06207619b46aff5d7d3824f315d0N.exe
4632	c89f06207619b46aff5d7d3824f315d0N.exe
4632	c89f06207619b46aff5d7d3824f315d0N.exe
4632	c89f06207619b46aff5d7d3824f315d0N.exe
4632	c89f06207619b46aff5d7d3824f315d0N.exe
4632	c89f06207619b46aff5d7d3824f315d0N.exe
4632	c89f06207619b46aff5d7d3824f315d0N.exe
4632	c89f06207619b46aff5d7d3824f315d0N.exe
4632	c89f06207619b46aff5d7d3824f315d0N.exe
4632	c89f06207619b46aff5d7d3824f315d0N.exe
4632	c89f06207619b46aff5d7d3824f315d0N.exe
4632	c89f06207619b46aff5d7d3824f315d0N.exe
4632	c89f06207619b46aff5d7d3824f315d0N.exe
4632	c89f06207619b46aff5d7d3824f315d0N.exe
4632	c89f06207619b46aff5d7d3824f315d0N.exe
4632	c89f06207619b46aff5d7d3824f315d0N.exe
4632	c89f06207619b46aff5d7d3824f315d0N.exe
4632	c89f06207619b46aff5d7d3824f315d0N.exe
4632	c89f06207619b46aff5d7d3824f315d0N.exe
4632	c89f06207619b46aff5d7d3824f315d0N.exe
4632	c89f06207619b46aff5d7d3824f315d0N.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4632	c89f06207619b46aff5d7d3824f315d0N.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4632 wrote to memory of 944	4632	c89f06207619b46aff5d7d3824f315d0N.exe	106
PID 4632 wrote to memory of 944	4632	c89f06207619b46aff5d7d3824f315d0N.exe	106
PID 4632 wrote to memory of 944	4632	c89f06207619b46aff5d7d3824f315d0N.exe	106
PID 4632 wrote to memory of 2084	4632	c89f06207619b46aff5d7d3824f315d0N.exe	108
PID 4632 wrote to memory of 2084	4632	c89f06207619b46aff5d7d3824f315d0N.exe	108
PID 4632 wrote to memory of 2084	4632	c89f06207619b46aff5d7d3824f315d0N.exe	108
PID 2084 wrote to memory of 2308	2084	cmd.exe	110
PID 2084 wrote to memory of 2308	2084	cmd.exe	110
PID 2084 wrote to memory of 2308	2084	cmd.exe	110
PID 944 wrote to memory of 4308	944	cmd.exe	111
PID 944 wrote to memory of 4308	944	cmd.exe	111
PID 944 wrote to memory of 4308	944	cmd.exe	111
PID 2084 wrote to memory of 2216	2084	cmd.exe	112
PID 2084 wrote to memory of 2216	2084	cmd.exe	112
PID 2084 wrote to memory of 2216	2084	cmd.exe	112

C:\Users\Admin\AppData\Local\Temp\c89f06207619b46aff5d7d3824f315d0N.exe
"C:\Users\Admin\AppData\Local\Temp\c89f06207619b46aff5d7d3824f315d0N.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4632
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "$77system" /tr '"C:\Users\Admin\AppData\Roaming\$77system.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:944
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "$77system" /tr '"C:\Users\Admin\AppData\Roaming\$77system.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4308
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp4934.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2084
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2308
- - C:\Users\Admin\AppData\Roaming\$77system.exe
    "C:\Users\Admin\AppData\Roaming\$77system.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2216

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4112,i,9445584274764997943,12714240264001792460,262144 --variations-seed-version --mojo-platform-channel-handle=4032 /prefetch:8
1⤵
PID:1984

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp4934.tmp.bat

Filesize
153B

MD5
eb47784a1df71b1e3acf64824a294583

SHA1
227eff3c8f49c24276441686bfdd064a91147a07

SHA256
612ec505b5d43a6df41017dfccb6fb0e0e2864c8ee70850327e029f5563c0a98

SHA512
12ad66ed5308d5f9e6c79536bcaf5f4a3850bc04f5c45487df77e2e15eacd453bf865a2d3ed90a3914fa76e73c77e280e582809f9d11c97581312f74f4391691

Download Submit
C:\Users\Admin\AppData\Roaming\$77system.exe

Filesize
40KB

MD5
c89f06207619b46aff5d7d3824f315d0

SHA1
e5253820c444920bc4ab49f67a50a65c0e725e67

SHA256
93e9e60b2642385ba3972dde3db83f404ede759b98e85465e962b040a81920af

SHA512
edba8543774ed2c22796adb41b02228ea7c33dac0c877f4274cac8553a5e08d1d41c45c3738f975e55f1b8ffb92c23ce27dc274a2ecf6abb9860ea6dd0617650

Download Submit
memory/2216-16-0x0000000074A90000-0x0000000075240000-memory.dmp

Filesize
7.7MB

Download
memory/2216-17-0x0000000074A90000-0x0000000075240000-memory.dmp

Filesize
7.7MB

Download
memory/4632-0-0x0000000074A9E000-0x0000000074A9F000-memory.dmp

Filesize
4KB

Download
memory/4632-1-0x0000000000FA0000-0x0000000000FB0000-memory.dmp

Filesize
64KB

Download
memory/4632-2-0x00000000058C0000-0x00000000058D2000-memory.dmp

Filesize
72KB

Download
memory/4632-3-0x0000000074A9E000-0x0000000074A9F000-memory.dmp

Filesize
4KB

Download
memory/4632-4-0x0000000074A90000-0x0000000075240000-memory.dmp

Filesize
7.7MB

Download
memory/4632-5-0x0000000001850000-0x00000000018B6000-memory.dmp

Filesize
408KB

Download
memory/4632-6-0x0000000008280000-0x000000000831C000-memory.dmp

Filesize
624KB

Download
memory/4632-11-0x0000000074A90000-0x0000000075240000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads