asyncrat | 71c71f532a866536e7adb19d12996c2d088d38377b53d5cce792b6d416fee4a1

General

Target

Api-Updater.exe
Size

211KB
MD5

c0094906b0e860b9df8aff26b335c308
SHA1

45e1941e2e0bb66b3701be26a8652c84604bfb7d
SHA256

71c71f532a866536e7adb19d12996c2d088d38377b53d5cce792b6d416fee4a1
SHA512

2af5f9d5535488b30ca51a9d01f4ef765c0be33075f2b6312c740c60de2746347ab7a6fc12f39f4dfc1594879d08298f6a9ea7d57740fc1738f426c36b03f855
SSDEEP

3072:xejqKOjH8TJ1P/4a+YKngaulnClmWVw1n3JDcv9ANoGCrI/dSEj7ObfREj8blPsg:xyOj234EFd3iLbmSy7OLREQblP

Score

10^/10

asyncrat execution persistence rat

Malware Config

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
asyncrat

Async RAT payload 2 IoCs

rat

resource	yara_rule
behavioral2/memory/1932-44-0x000000001D210000-0x000000001D242000-memory.dmp	family_asyncrat
behavioral2/memory/1932-43-0x000000001D1E0000-0x000000001D216000-memory.dmp	family_asyncrat

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
5060	powershell.exe
1840	powershell.exe
1412	powershell.exe

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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	Api-Updater.exe

Executes dropped EXE 2 IoCs

pid	Process
2496	Api-Updater.exe
2384	Api-Updater.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\GsjJjnxnnax	Api-Updater.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
5	ip-api.com

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

System Information Discovery
T1082

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
3268	schtasks.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
5060	powershell.exe
5060	powershell.exe
1840	powershell.exe
1840	powershell.exe
1412	powershell.exe
1412	powershell.exe
1932	Api-Updater.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	1932	Api-Updater.exe
Token: SeDebugPrivilege	5060	powershell.exe
Token: SeDebugPrivilege	1840	powershell.exe
Token: SeDebugPrivilege	1412	powershell.exe
Token: SeDebugPrivilege	2496	Api-Updater.exe
Token: SeDebugPrivilege	2384	Api-Updater.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1932	Api-Updater.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1932 wrote to memory of 5060	1932	Api-Updater.exe	85
PID 1932 wrote to memory of 5060	1932	Api-Updater.exe	85
PID 1932 wrote to memory of 1840	1932	Api-Updater.exe	87
PID 1932 wrote to memory of 1840	1932	Api-Updater.exe	87
PID 1932 wrote to memory of 1412	1932	Api-Updater.exe	89
PID 1932 wrote to memory of 1412	1932	Api-Updater.exe	89
PID 1932 wrote to memory of 3268	1932	Api-Updater.exe	91
PID 1932 wrote to memory of 3268	1932	Api-Updater.exe	91

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\Api-Updater.exe
"C:\Users\Admin\AppData\Local\Temp\Api-Updater.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1932
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Api-Updater.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5060
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Api-Updater.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1840
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\Api-Updater.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1412
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /sc minute /mo 1 /rl highest /tn "Api-Updater" /tr "C:\ProgramData\Api-Updater.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3268

C:\ProgramData\Api-Updater.exe
C:\ProgramData\Api-Updater.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2496

C:\ProgramData\Api-Updater.exe
C:\ProgramData\Api-Updater.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2384

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\Api-Updater.exe

Filesize
211KB

MD5
c0094906b0e860b9df8aff26b335c308

SHA1
45e1941e2e0bb66b3701be26a8652c84604bfb7d

SHA256
71c71f532a866536e7adb19d12996c2d088d38377b53d5cce792b6d416fee4a1

SHA512
2af5f9d5535488b30ca51a9d01f4ef765c0be33075f2b6312c740c60de2746347ab7a6fc12f39f4dfc1594879d08298f6a9ea7d57740fc1738f426c36b03f855

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Api-Updater.exe.log

Filesize
1KB

MD5
3982d6d16fd43ae609fd495bb33433a2

SHA1
6c33cd681fdfd9a844a3128602455a768e348765

SHA256
9a0a58776494250224706cbfbb08562eec3891fb988f17d66d0d8f9af4253cf9

SHA512
4b69315f5d139b8978123bebd417231b28f86b6c1433eb88105465a342339c6c6b8c240a2ca8d2a9c1fca20136c8c167b78a770ab0664231f6e1742291cbf1aa

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
b51dc9e5ec3c97f72b4ca9488bbb4462

SHA1
5c1e8c0b728cd124edcacefb399bbd5e25b21bd3

SHA256
976f9534aa2976c85c2455bdde786a3f55d63aefdd40942eba1223c4c93590db

SHA512
0e5aa6cf64c535aefb833e5757b68e1094c87424abe2615a7d7d26b1b31eff358d12e36e75ca57fd690a9919b776600bf4c5c0e5a5df55366ba62238bdf3f280

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_s0j0sx11.kll.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1932-2-0x00007FF8BCC80000-0x00007FF8BD741000-memory.dmp

Filesize
10.8MB

Download
memory/1932-43-0x000000001D1E0000-0x000000001D216000-memory.dmp

Filesize
216KB

Download
memory/1932-0-0x00007FF8BCC83000-0x00007FF8BCC85000-memory.dmp

Filesize
8KB

Download
memory/1932-1-0x0000000000EE0000-0x0000000000F1C000-memory.dmp

Filesize
240KB

Download
memory/1932-46-0x00007FF8BCC80000-0x00007FF8BD741000-memory.dmp

Filesize
10.8MB

Download
memory/1932-45-0x00007FF8BCC83000-0x00007FF8BCC85000-memory.dmp

Filesize
8KB

Download
memory/1932-44-0x000000001D210000-0x000000001D242000-memory.dmp

Filesize
200KB

Download
memory/5060-13-0x0000019E5A0D0000-0x0000019E5A0F2000-memory.dmp

Filesize
136KB

Download
memory/5060-18-0x00007FF8BCC80000-0x00007FF8BD741000-memory.dmp

Filesize
10.8MB

Download
memory/5060-15-0x00007FF8BCC80000-0x00007FF8BD741000-memory.dmp

Filesize
10.8MB

Download
memory/5060-14-0x00007FF8BCC80000-0x00007FF8BD741000-memory.dmp

Filesize
10.8MB

Download
memory/5060-3-0x00007FF8BCC80000-0x00007FF8BD741000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads