asyncrat | d5d023c6add2232b9ca0bce13e7b813e9240803feb084d2a8f1d504d96b85a6e

Analysis

max time kernel
151s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
02-04-2024 16:54

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General

Target

92077215e723b003502dff2ac974dc43_JaffaCakes118.exe
Size

4.2MB
MD5

92077215e723b003502dff2ac974dc43
SHA1

775b63a3c020c9aead9addb32776beb26704884a
SHA256

d5d023c6add2232b9ca0bce13e7b813e9240803feb084d2a8f1d504d96b85a6e
SHA512

14880d120b50b9ebfd1f08716802d37ba3021655094799cfa98d763f1b91928a137b46eca6b5df5497f4088b19bde546592429037c533756a708220c47aed764
SSDEEP

98304:yJCbuSMburCaMZh0yEKj+WRvrY1dcZ048HV/bFy8jJ7D:MmMbuQZlFY7KsZPN

Score

10^/10

asyncrat oski default infostealer persistence rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.6

Botnet

Default

91.193.75.169:4782

Mutex

DcRatMutex_qwqdanchuk

Attributes

delay
1
install
true
install_file
Windows Security.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Oski
Oski is an infostealer targeting browser data, crypto wallets.
infostealer oski

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

92077215e723b003502dff2ac974dc43_JaffaCakes118.exeWindows Defender Security.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation	92077215e723b003502dff2ac974dc43_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation	Windows Defender Security.exe

Executes dropped EXE 6 IoCs

Processes:

Windows Defender Security.exeOski Cracked.exeWindows Defender Security.exeWindows Security.exeWindows Security.exeWindows Security.exe

pid	Process
3376	Windows Defender Security.exe
5040	Oski Cracked.exe
3528	Windows Defender Security.exe
100	Windows Security.exe
4180	Windows Security.exe
4848	Windows Security.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

Windows Defender Security.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-513485977-2495024337-1260977654-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\rFMBoLtBRG = "C:\\Users\\Admin\\AppData\\Roaming\\sKGWfQbTCS\\rCTXFgWqTH.exe"	Windows Defender Security.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

Windows Defender Security.exeWindows Security.exe

description	pid	Process	procid_target
PID 3376 set thread context of 3528	3376	Windows Defender Security.exe	89
PID 100 set thread context of 4848	100	Windows Security.exe	98

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

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

persistence

Scheduled Task/Job

T1053

Processes:

schtasks.exe

pid	Process
4548	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

Processes:

timeout.exe

pid	Process
2672	timeout.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

Windows Defender Security.exeWindows Security.exeWindows Security.exe

pid	Process
3528	Windows Defender Security.exe
3528	Windows Defender Security.exe
3528	Windows Defender Security.exe
3528	Windows Defender Security.exe
3528	Windows Defender Security.exe
3528	Windows Defender Security.exe
3528	Windows Defender Security.exe
3528	Windows Defender Security.exe
3528	Windows Defender Security.exe
3528	Windows Defender Security.exe
3528	Windows Defender Security.exe
3528	Windows Defender Security.exe
3528	Windows Defender Security.exe
3528	Windows Defender Security.exe
3528	Windows Defender Security.exe
3528	Windows Defender Security.exe
3528	Windows Defender Security.exe
3528	Windows Defender Security.exe
3528	Windows Defender Security.exe
3528	Windows Defender Security.exe
3528	Windows Defender Security.exe
3528	Windows Defender Security.exe
3528	Windows Defender Security.exe
3528	Windows Defender Security.exe
3528	Windows Defender Security.exe
3528	Windows Defender Security.exe
3528	Windows Defender Security.exe
3528	Windows Defender Security.exe
3528	Windows Defender Security.exe
100	Windows Security.exe
100	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe
4848	Windows Security.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

Windows Defender Security.exeWindows Security.exeWindows Security.exe

description	pid	Process
Token: SeDebugPrivilege	3528	Windows Defender Security.exe
Token: SeDebugPrivilege	100	Windows Security.exe
Token: SeDebugPrivilege	4848	Windows Security.exe

Suspicious use of WriteProcessMemory 39 IoCs

Processes:

92077215e723b003502dff2ac974dc43_JaffaCakes118.exeWindows Defender Security.exeWindows Defender Security.execmd.execmd.exeWindows Security.exe

description	pid	Process	procid_target
PID 2544 wrote to memory of 3376	2544	92077215e723b003502dff2ac974dc43_JaffaCakes118.exe	87
PID 2544 wrote to memory of 3376	2544	92077215e723b003502dff2ac974dc43_JaffaCakes118.exe	87
PID 2544 wrote to memory of 3376	2544	92077215e723b003502dff2ac974dc43_JaffaCakes118.exe	87
PID 2544 wrote to memory of 5040	2544	92077215e723b003502dff2ac974dc43_JaffaCakes118.exe	88
PID 2544 wrote to memory of 5040	2544	92077215e723b003502dff2ac974dc43_JaffaCakes118.exe	88
PID 3376 wrote to memory of 3528	3376	Windows Defender Security.exe	89
PID 3376 wrote to memory of 3528	3376	Windows Defender Security.exe	89
PID 3376 wrote to memory of 3528	3376	Windows Defender Security.exe	89
PID 3376 wrote to memory of 3528	3376	Windows Defender Security.exe	89
PID 3376 wrote to memory of 3528	3376	Windows Defender Security.exe	89
PID 3376 wrote to memory of 3528	3376	Windows Defender Security.exe	89
PID 3376 wrote to memory of 3528	3376	Windows Defender Security.exe	89
PID 3376 wrote to memory of 3528	3376	Windows Defender Security.exe	89
PID 3528 wrote to memory of 3760	3528	Windows Defender Security.exe	90
PID 3528 wrote to memory of 3760	3528	Windows Defender Security.exe	90
PID 3528 wrote to memory of 3760	3528	Windows Defender Security.exe	90
PID 3528 wrote to memory of 1712	3528	Windows Defender Security.exe	91
PID 3528 wrote to memory of 1712	3528	Windows Defender Security.exe	91
PID 3528 wrote to memory of 1712	3528	Windows Defender Security.exe	91
PID 1712 wrote to memory of 2672	1712	cmd.exe	94
PID 1712 wrote to memory of 2672	1712	cmd.exe	94
PID 1712 wrote to memory of 2672	1712	cmd.exe	94
PID 3760 wrote to memory of 4548	3760	cmd.exe	95
PID 3760 wrote to memory of 4548	3760	cmd.exe	95
PID 3760 wrote to memory of 4548	3760	cmd.exe	95
PID 1712 wrote to memory of 100	1712	cmd.exe	96
PID 1712 wrote to memory of 100	1712	cmd.exe	96
PID 1712 wrote to memory of 100	1712	cmd.exe	96
PID 100 wrote to memory of 4180	100	Windows Security.exe	97
PID 100 wrote to memory of 4180	100	Windows Security.exe	97
PID 100 wrote to memory of 4180	100	Windows Security.exe	97
PID 100 wrote to memory of 4848	100	Windows Security.exe	98
PID 100 wrote to memory of 4848	100	Windows Security.exe	98
PID 100 wrote to memory of 4848	100	Windows Security.exe	98
PID 100 wrote to memory of 4848	100	Windows Security.exe	98
PID 100 wrote to memory of 4848	100	Windows Security.exe	98
PID 100 wrote to memory of 4848	100	Windows Security.exe	98
PID 100 wrote to memory of 4848	100	Windows Security.exe	98
PID 100 wrote to memory of 4848	100	Windows Security.exe	98

C:\Users\Admin\AppData\Local\Temp\92077215e723b003502dff2ac974dc43_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\92077215e723b003502dff2ac974dc43_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2544
- C:\Users\Admin\AppData\Roaming\Windows Defender Security Service\Windows Defender Security.exe
  "C:\Users\Admin\AppData\Roaming\Windows Defender Security Service\Windows Defender Security.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:3376
- - C:\Users\Admin\AppData\Roaming\Windows Defender Security Service\Windows Defender Security.exe
    "C:\Users\Admin\AppData\Roaming\Windows Defender Security Service\Windows Defender Security.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3528
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Windows Security" /tr '"C:\Users\Admin\AppData\Roaming\Windows Security.exe"' & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3760
    - - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /f /sc onlogon /rl highest /tn "Windows Security" /tr '"C:\Users\Admin\AppData\Roaming\Windows Security.exe"'
        5⤵
        Creates scheduled task(s)
        
        PID:4548
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp82AD.tmp.bat""
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1712
    - - C:\Windows\SysWOW64\timeout.exe
        
        timeout 3
        5⤵
        Delays execution with timeout.exe
        
        PID:2672
    - - C:\Users\Admin\AppData\Roaming\Windows Security.exe
        
        "C:\Users\Admin\AppData\Roaming\Windows Security.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:100
      - C:\Users\Admin\AppData\Roaming\Windows Security.exe
        
        "C:\Users\Admin\AppData\Roaming\Windows Security.exe"
        6⤵
        Executes dropped EXE
        
        PID:4180
      - C:\Users\Admin\AppData\Roaming\Windows Security.exe
        
        "C:\Users\Admin\AppData\Roaming\Windows Security.exe"
        6⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:4848
- C:\Users\Admin\AppData\Roaming\Oski Cracked.exe
  "C:\Users\Admin\AppData\Roaming\Oski Cracked.exe"
  2⤵
  - Executes dropped EXE
  PID:5040

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Windows Defender Security.exe.log

Filesize
507B

MD5
8cf94b5356be60247d331660005941ec

SHA1
fdedb361f40f22cb6a086c808fc0056d4e421131

SHA256
52a5b2d36f2b72cb02c695cf7ef46444dda73d4ea82a73e0894c805fa9987bc0

SHA512
b886dfc8bf03f8627f051fb6e2ac40ae2e7713584695a365728eb2e2c87217830029aa35bd129c642fa03dde3f7a7dd5690b16248676be60a6bb5f497fb23651

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp82AD.tmp.bat

Filesize
160B

MD5
aa3cc158e9d4f938d0a74f8cf8631f5b

SHA1
ec4450347fdebb4ce928d17c08626751390b48e9

SHA256
4e0085d7583f579461d35e9660d4d909d94aaf07518f03ae2677ff1929738282

SHA512
af49a6ab73cc0a5797e15798421cce4df6acfb02eb41e708e6b35e92beedf24ffee66d631fe7ba3d884a20656d9ad41ebecc989e636b4d17cd26ef7add736469

Download Submit
C:\Users\Admin\AppData\Roaming\Oski Cracked.exe

Filesize
3.9MB

MD5
2bd0e61c45d352697c5e16437d8055b0

SHA1
0b9b24d396a50c2dc13d73e1f2d57c1891de3f31

SHA256
71efc8fc1dede4f96e837043ad3cbd38a65bd530ce71ae4d44ddc29843fab70b

SHA512
80044d4ece73637328e9b456c3127be02ecc9cea4b12fee65a884fed0266187aec58e6906c652face3b6125d59b9fa10303f02e1d8bfa33dbccb62fd2bc2b73d

Download Submit
C:\Users\Admin\AppData\Roaming\Windows Defender Security Service\Windows Defender Security.exe

Filesize
148KB

MD5
1802b2a6ead8dbd53c25809cb6dcfb93

SHA1
82293a68beb4729d77badbd252c9f71484915b1e

SHA256
0cec4537c128355f982dd06016a733ab2bd486f479f75b1ca01814b57c0ccc7d

SHA512
1e92486fe7a3bebe764e1fc499504d28fc11acbb32c614c639cf1e40a30a29b4e9ad258617f5fb4b484de46ef526c32ecb0e6cc96591df40d4db41b6980b4dc2

Download Submit
memory/100-56-0x00000000057E0000-0x00000000057F0000-memory.dmp

Filesize
64KB

Download
memory/100-63-0x0000000075090000-0x0000000075840000-memory.dmp

Filesize
7.7MB

Download
memory/100-55-0x0000000075090000-0x0000000075840000-memory.dmp

Filesize
7.7MB

Download
memory/2544-28-0x0000000075290000-0x0000000075841000-memory.dmp

Filesize
5.7MB

Download
memory/2544-1-0x0000000075290000-0x0000000075841000-memory.dmp

Filesize
5.7MB

Download
memory/2544-2-0x0000000001A50000-0x0000000001A60000-memory.dmp

Filesize
64KB

Download
memory/2544-0-0x0000000075290000-0x0000000075841000-memory.dmp

Filesize
5.7MB

Download
memory/3376-34-0x0000000072400000-0x0000000072BB0000-memory.dmp

Filesize
7.7MB

Download
memory/3376-35-0x0000000005810000-0x0000000005DB4000-memory.dmp

Filesize
5.6MB

Download
memory/3376-36-0x0000000005160000-0x00000000051F2000-memory.dmp

Filesize
584KB

Download
memory/3376-37-0x0000000005260000-0x00000000052FC000-memory.dmp

Filesize
624KB

Download
memory/3376-39-0x0000000005070000-0x000000000507A000-memory.dmp

Filesize
40KB

Download
memory/3376-33-0x0000000005250000-0x0000000005260000-memory.dmp

Filesize
64KB

Download
memory/3376-43-0x0000000072400000-0x0000000072BB0000-memory.dmp

Filesize
7.7MB

Download
memory/3376-30-0x00000000007E0000-0x000000000080C000-memory.dmp

Filesize
176KB

Download
memory/3528-40-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3528-45-0x0000000004890000-0x00000000048A0000-memory.dmp

Filesize
64KB

Download
memory/3528-50-0x0000000072400000-0x0000000072BB0000-memory.dmp

Filesize
7.7MB

Download
memory/3528-44-0x0000000072400000-0x0000000072BB0000-memory.dmp

Filesize
7.7MB

Download
memory/4848-65-0x0000000005670000-0x0000000005680000-memory.dmp

Filesize
64KB

Download
memory/4848-62-0x0000000075090000-0x0000000075840000-memory.dmp

Filesize
7.7MB

Download
memory/4848-68-0x0000000075090000-0x0000000075840000-memory.dmp

Filesize
7.7MB

Download
memory/4848-70-0x0000000005670000-0x0000000005680000-memory.dmp

Filesize
64KB

Download
memory/5040-31-0x00007FFFA0DD0000-0x00007FFFA1891000-memory.dmp

Filesize
10.8MB

Download
memory/5040-59-0x000000001B4E0000-0x000000001B8FC000-memory.dmp

Filesize
4.1MB

Download
memory/5040-29-0x00000000003A0000-0x0000000000796000-memory.dmp

Filesize
4.0MB

Download
memory/5040-64-0x000000001B4D0000-0x000000001B4E0000-memory.dmp

Filesize
64KB

Download
memory/5040-32-0x00007FFFBD8F0000-0x00007FFFBD9AE000-memory.dmp

Filesize
760KB

Download
memory/5040-66-0x00007FFFA0DD0000-0x00007FFFA1891000-memory.dmp

Filesize
10.8MB

Download
memory/5040-67-0x00007FFFBD8F0000-0x00007FFFBD9AE000-memory.dmp

Filesize
760KB

Download
memory/5040-69-0x000000001B4D0000-0x000000001B4E0000-memory.dmp

Filesize
64KB

Download