asyncrat | 46b90cce656efe63bc33b585581c2cafd25778f2854a334f0421d219ed17b339

Analysis

max time kernel
142s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
22/04/2024, 06:58

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General

Target
12de70d06ed65680914d061347ac1f95.exe
Size 89KB
Sample240422-hrha8agg67
SHA256 46b90cce656efe63bc33b585581c2cafd25778f2854a334f0421d219ed17b339
MD5 12de70d06ed65680914d061347ac1f95
SHA1 14023e1ed46236cbfb463ddccd6345caa3c14d54
SHA512 7d6a20b0e9d6c5db0177e08f197f7858aa8000097c5eb2fa7a2b3d2181fefb53760efacd7fcba32d481193eee547162ac22b08b8e8777b68fc1597dec12db67f
SSDEEP 1536:EGjb5BKhaUxo6TRMinLvIbzV6A2SYzEOV4c7rei1:EGjb5IJxZTLnL4aSY4OVDui
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

103.249.112.118:8848

Mutex

DcRatMutex_qwqdanchun

Attributes

delay
1
install
false
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Downloads MZ/PE file

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1004 set thread context of 3524	1004	Accounts_Ledger_Software.eXE	105

Executes dropped EXE 2 IoCs

pid	Process
1004	Accounts_Ledger_Software.eXE
1872	Accounts_Ledger_Software.eXE

Creates scheduled task(s) 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
4300	SCHtAsKs.EXe
3328	SCHtAsKs.EXe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1384	12de70d06ed65680914d061347ac1f95.exe
1384	12de70d06ed65680914d061347ac1f95.exe
1384	12de70d06ed65680914d061347ac1f95.exe
1384	12de70d06ed65680914d061347ac1f95.exe
1004	Accounts_Ledger_Software.eXE
1004	Accounts_Ledger_Software.eXE
1004	Accounts_Ledger_Software.eXE
1872	Accounts_Ledger_Software.eXE
1872	Accounts_Ledger_Software.eXE

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1384	12de70d06ed65680914d061347ac1f95.exe
Token: SeDebugPrivilege	1004	Accounts_Ledger_Software.eXE
Token: SeDebugPrivilege	3524	aspnet_compiler.exe
Token: SeDebugPrivilege	1872	Accounts_Ledger_Software.eXE

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1384 wrote to memory of 4300	1384	12de70d06ed65680914d061347ac1f95.exe	90
PID 1384 wrote to memory of 4300	1384	12de70d06ed65680914d061347ac1f95.exe	90
PID 1384 wrote to memory of 4064	1384	12de70d06ed65680914d061347ac1f95.exe	92
PID 1384 wrote to memory of 4064	1384	12de70d06ed65680914d061347ac1f95.exe	92
PID 1384 wrote to memory of 4064	1384	12de70d06ed65680914d061347ac1f95.exe	92
PID 1004 wrote to memory of 3328	1004	Accounts_Ledger_Software.eXE	103
PID 1004 wrote to memory of 3328	1004	Accounts_Ledger_Software.eXE	103
PID 1004 wrote to memory of 3524	1004	Accounts_Ledger_Software.eXE	105
PID 1004 wrote to memory of 3524	1004	Accounts_Ledger_Software.eXE	105
PID 1004 wrote to memory of 3524	1004	Accounts_Ledger_Software.eXE	105
PID 1004 wrote to memory of 3524	1004	Accounts_Ledger_Software.eXE	105
PID 1004 wrote to memory of 3524	1004	Accounts_Ledger_Software.eXE	105
PID 1004 wrote to memory of 3524	1004	Accounts_Ledger_Software.eXE	105
PID 1004 wrote to memory of 3524	1004	Accounts_Ledger_Software.eXE	105
PID 1004 wrote to memory of 3524	1004	Accounts_Ledger_Software.eXE	105

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\12de70d06ed65680914d061347ac1f95.exe
"C:\Users\Admin\AppData\Local\Temp\12de70d06ed65680914d061347ac1f95.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1384
- C:\Windows\SYSTEM32\SCHtAsKs.EXe
  "SCHtAsKs.EXe" /create /tn WindowsUpdates /TR 'C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE' /du 9999:59 /sc daily /ri 1
  2⤵
  - Creates scheduled task(s)
  PID:4300
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
  2⤵
  PID:4064

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 --no-appcompat-clear --mojo-platform-channel-handle=3844 --field-trial-handle=2280,i,716736634476467098,11449718822158202904,262144 --variations-seed-version /prefetch:8
1⤵
PID:4996

C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE
C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE
1⤵
- Suspicious use of SetThreadContext
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1004
- C:\Windows\system32\SCHtAsKs.EXe
  "SCHtAsKs.EXe" /create /tn WindowsUpdates /TR 'C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE' /du 9999:59 /sc daily /ri 1
  2⤵
  - Creates scheduled task(s)
  PID:3328
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3524

C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE
C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE
1⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1872

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

Accounts_Ledger_Software.eXE.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Accounts_Ledger_Software.eXE.log
Size 1KB
SHA256 2b9c6ceca7fc1a6b3795798adbaa4e7ef0462573c1a528ff8c9f4201885cc8ce
MD5 b45add5931a183b5b884e454b290b42e
SHA1 4aafa6d93dea853328fe65347ce24e334e7f0281
SHA512 969f5f114a34310d55d8f18dd4935aa348d85262a84378757279c4b5dee6b6fbfc9941574f7128eb4e2b6b7eafffdf394d14568ea4b509b740249ed748ea8127
MD5 SHA1 SHA512

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Accounts_Ledger_Software.eXE

Path C:\Users\Admin\AppData\Roaming\MicrosoftwindowsUpdates\Accounts_Ledger_Software.eXE
Size 89KB
SHA256 46b90cce656efe63bc33b585581c2cafd25778f2854a334f0421d219ed17b339
MD5 12de70d06ed65680914d061347ac1f95
SHA1 14023e1ed46236cbfb463ddccd6345caa3c14d54
SHA512 7d6a20b0e9d6c5db0177e08f197f7858aa8000097c5eb2fa7a2b3d2181fefb53760efacd7fcba32d481193eee547162ac22b08b8e8777b68fc1597dec12db67f
SSDEEP 1536:EGjb5BKhaUxo6TRMinLvIbzV6A2SYzEOV4c7rei1:EGjb5IJxZTLnL4aSY4OVDui
MD5 SHA1 SHA512 SSDEEP

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memory/1004-15-0x00007FFEAB1C0000-0x00007FFEABC81000-memory.dmp

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memory/1004-11-0x0000000002550000-0x0000000002560000-memory.dmp

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memory/1004-10-0x00007FFEAB1C0000-0x00007FFEABC81000-memory.dmp

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memory/1384-7-0x00007FFEAC100000-0x00007FFEACBC1000-memory.dmp

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memory/1384-1-0x00007FFEAC100000-0x00007FFEACBC1000-memory.dmp

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memory/1384-5-0x0000000002970000-0x0000000002971000-memory.dmp

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memory/1384-4-0x000000001B5C0000-0x000000001B5FC000-memory.dmp

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memory/1384-3-0x000000001B630000-0x000000001B640000-memory.dmp

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memory/1384-0-0x0000000000820000-0x000000000083A000-memory.dmp

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memory/1872-28-0x00007FFEAB2E0000-0x00007FFEABDA1000-memory.dmp

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memory/1872-27-0x00007FFEAB2E0000-0x00007FFEABDA1000-memory.dmp

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memory/3524-17-0x00000000051E0000-0x00000000051F0000-memory.dmp

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memory/3524-21-0x0000000005AF0000-0x0000000005B8C000-memory.dmp

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memory/3524-22-0x0000000006140000-0x00000000066E4000-memory.dmp

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memory/3524-23-0x0000000005C00000-0x0000000005C66000-memory.dmp

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memory/3524-24-0x0000000074860000-0x0000000075010000-memory.dmp

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memory/3524-18-0x00000000772C1000-0x00000000772C2000-memory.dmp

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memory/3524-16-0x0000000074860000-0x0000000075010000-memory.dmp

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memory/3524-13-0x0000000000400000-0x0000000000416000-memory.dmp

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