asyncrat | 5f2ff12584a99c9720d27bf219ec4691f80ea258d71e391ca28f4590f360a775

Analysis

max time kernel
164s
max time network
165s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
19/04/2024, 00:51

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General

Target
f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe
Size 312KB
Sample240419-a7hypacg3y
SHA256 5f2ff12584a99c9720d27bf219ec4691f80ea258d71e391ca28f4590f360a775
MD5 f9235b9b51702c123e3b6c8c7dafaad1
SHA1 9e5867039896c5d1e5f06185dc0eeb9d4a53ac5a
SHA512 a21857672861bbaff86a5cedb9cc04df4f05a9a948135336849b6d8f2112da85de2a0b71de7e75dad7ddc66b4a80dfb53094ea91650f2e2ba96b9db13f77ba0b
SSDEEP 6144:wBlL/cYcRhkSQU1DHVOnYBYJal4j9Rz/7R/Ug5X1tZaDTcoe:CelhMtYBYsWjLz/9vtUTcT
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

tinrinrin.kozow.com:9091

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
Edge.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 2 IoCs

rat

resource	yara_rule
behavioral2/memory/4640-16-0x00000000048F0000-0x0000000004902000-memory.dmp	family_asyncrat
behavioral2/memory/4640-17-0x0000000004980000-0x0000000004990000-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-1-5-21-3198953144-1466794930-246379610-1000\Control Panel\International\Geo\Nation	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe

Executes dropped EXE 2 IoCs

pid	Process
2540	Edge.exe
1984	Edge.exe

Loads dropped DLL 2 IoCs

pid	Process
4512	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe
2540	Edge.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4512 set thread context of 4640	4512	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe	84
PID 2540 set thread context of 1984	2540	Edge.exe	92

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

System Information Discovery
T1082

NSIS installer 2 IoCs

installer

resource	yara_rule
behavioral2/files/0x0007000000023455-29.dat	nsis_installer_1
behavioral2/files/0x0007000000023455-29.dat	nsis_installer_2

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

pid	Process
2988	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3212	timeout.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
4640	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe
4640	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe
4640	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe
4640	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe
4640	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe
4640	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe
4640	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe
4640	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe
4640	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe
4640	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe
4640	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe
4640	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe
4640	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe
4640	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe
4640	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe
4640	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe
4640	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe
4640	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe
4640	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4640	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe
Token: SeDebugPrivilege	1984	Edge.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 4512 wrote to memory of 4640	4512	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe	84
PID 4512 wrote to memory of 4640	4512	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe	84
PID 4512 wrote to memory of 4640	4512	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe	84
PID 4512 wrote to memory of 4640	4512	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe	84
PID 4512 wrote to memory of 4640	4512	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe	84
PID 4512 wrote to memory of 4640	4512	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe	84
PID 4512 wrote to memory of 4640	4512	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe	84
PID 4512 wrote to memory of 4640	4512	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe	84
PID 4512 wrote to memory of 4640	4512	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe	84
PID 4512 wrote to memory of 4640	4512	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe	84
PID 4640 wrote to memory of 3364	4640	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe	85
PID 4640 wrote to memory of 3364	4640	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe	85
PID 4640 wrote to memory of 3364	4640	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe	85
PID 4640 wrote to memory of 2632	4640	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe	87
PID 4640 wrote to memory of 2632	4640	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe	87
PID 4640 wrote to memory of 2632	4640	f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe	87
PID 3364 wrote to memory of 2988	3364	cmd.exe	89
PID 3364 wrote to memory of 2988	3364	cmd.exe	89
PID 3364 wrote to memory of 2988	3364	cmd.exe	89
PID 2632 wrote to memory of 3212	2632	cmd.exe	90
PID 2632 wrote to memory of 3212	2632	cmd.exe	90
PID 2632 wrote to memory of 3212	2632	cmd.exe	90
PID 2632 wrote to memory of 2540	2632	cmd.exe	91
PID 2632 wrote to memory of 2540	2632	cmd.exe	91
PID 2632 wrote to memory of 2540	2632	cmd.exe	91
PID 2540 wrote to memory of 1984	2540	Edge.exe	92
PID 2540 wrote to memory of 1984	2540	Edge.exe	92
PID 2540 wrote to memory of 1984	2540	Edge.exe	92
PID 2540 wrote to memory of 1984	2540	Edge.exe	92
PID 2540 wrote to memory of 1984	2540	Edge.exe	92
PID 2540 wrote to memory of 1984	2540	Edge.exe	92
PID 2540 wrote to memory of 1984	2540	Edge.exe	92
PID 2540 wrote to memory of 1984	2540	Edge.exe	92
PID 2540 wrote to memory of 1984	2540	Edge.exe	92
PID 2540 wrote to memory of 1984	2540	Edge.exe	92

C:\Users\Admin\AppData\Local\Temp\f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4512
- C:\Users\Admin\AppData\Local\Temp\f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\f9235b9b51702c123e3b6c8c7dafaad1_JaffaCakes118.exe"
  2⤵
  - Checks computer location settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4640
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Edge" /tr '"C:\Users\Admin\AppData\Roaming\Edge.exe"' & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3364
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "Edge" /tr '"C:\Users\Admin\AppData\Roaming\Edge.exe"'
      4⤵
      Creates scheduled task(s)
      PID:2988
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp4DD.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2632
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:3212
  - - C:\Users\Admin\AppData\Roaming\Edge.exe
      "C:\Users\Admin\AppData\Roaming\Edge.exe"
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Suspicious use of SetThreadContext
      Suspicious use of WriteProcessMemory
      PID:2540
    - - C:\Users\Admin\AppData\Roaming\Edge.exe
        
        "C:\Users\Admin\AppData\Roaming\Edge.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:1984

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

nn8lgmg7r8qsag

Path C:\Users\Admin\AppData\Local\Temp\nn8lgmg7r8qsag
Size 282KB
SHA256 96400e822c64df8d089c7205afb181cb66494b78d09e0a04ae0da7f39ebbdbf5
MD5 5fe8fec5a32be9df8bf109e10e2b8bd2
SHA1 8e5f954d496977e1368c0198696e5d4990096238
SHA512 d4631c27413ae63af92427ffb9831e3fa2909669046943eedead511621e53d17355a60f22209638ec78ed106a6967657a377a12397339eaf5a99517ac1adaec2
SSDEEP 6144:cjeY8Fs4lPshdKQLFcaVN1VKAvnThB7zsk/dhAFbyNX:cIO4l6DqaNvKAvlpzlFhcOX
MD5 SHA1 SHA512 SSDEEP

Submit Download

vzjtdshtcu.dll

Path C:\Users\Admin\AppData\Local\Temp\nscD959.tmp\vzjtdshtcu.dll
Size 29KB
SHA256 5d362cfb794eebda011289c7ffaf328b9537e87dca13e79d60508773b538f6c6
MD5 433747be519bda968dfcb35f6970fa5b
SHA1 faaea3969400d0302544ad4fd9cb031b7637936f
SHA512 6a97c1f265546f71910bad5465c767314ed97e2246363e25077471db1a5cfdd92a56b1da02e8620775fdbc8a231636f147c6e66c781b38f03fe05b3da256530a
SSDEEP 768:M2TzWszi/+6IQBM9x22OgNDiSn1n4RT1:MmnzvPQBM9x2ZSnKR
MD5 SHA1 SHA512 SSDEEP

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tmp4DD.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp4DD.tmp.bat
Size 147B
SHA256 9d319914f32a24144e7a91def291bcbdb8a99a596d19f02d69f18db076907b1e
MD5 8a29a4f9dd28a280b377db59ff3945dc
SHA1 b53ec44bb07e3eff4eb5ae646144876d752c9cc8
SHA512 662221ddede45fefdcacdd9c564e08126c5a396645c0a9e853cfc28a24eaee1fb4d7bb6fc799fe36a46102ecaa879c03bdf4e82b140b9c0f21a2bd223e27c671
MD5 SHA1 SHA512

Submit Download

Edge.exe

Path C:\Users\Admin\AppData\Roaming\Edge.exe
Size 312KB
SHA256 5f2ff12584a99c9720d27bf219ec4691f80ea258d71e391ca28f4590f360a775
MD5 f9235b9b51702c123e3b6c8c7dafaad1
SHA1 9e5867039896c5d1e5f06185dc0eeb9d4a53ac5a
SHA512 a21857672861bbaff86a5cedb9cc04df4f05a9a948135336849b6d8f2112da85de2a0b71de7e75dad7ddc66b4a80dfb53094ea91650f2e2ba96b9db13f77ba0b
SSDEEP 6144:wBlL/cYcRhkSQU1DHVOnYBYJal4j9Rz/7R/Ug5X1tZaDTcoe:CelhMtYBYsWjLz/9vtUTcT
MD5 SHA1 SHA512 SSDEEP

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memory/1984-49-0x0000000004930000-0x0000000004940000-memory.dmp

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memory/1984-43-0x0000000000400000-0x000000000044B000-memory.dmp

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memory/1984-58-0x0000000004930000-0x0000000004940000-memory.dmp

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memory/1984-55-0x0000000004930000-0x0000000004940000-memory.dmp

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memory/1984-57-0x0000000004930000-0x0000000004940000-memory.dmp

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memory/1984-56-0x0000000004930000-0x0000000004940000-memory.dmp

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memory/1984-54-0x0000000073CC0000-0x0000000074470000-memory.dmp

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memory/1984-51-0x0000000004930000-0x0000000004940000-memory.dmp

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memory/1984-50-0x0000000004930000-0x0000000004940000-memory.dmp

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memory/1984-48-0x0000000004930000-0x0000000004940000-memory.dmp

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memory/1984-47-0x0000000073CC0000-0x0000000074470000-memory.dmp

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memory/1984-46-0x0000000000400000-0x000000000044B000-memory.dmp

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memory/1984-45-0x0000000000400000-0x000000000044B000-memory.dmp

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memory/2540-39-0x00000000749C0000-0x00000000749CB000-memory.dmp

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memory/2540-44-0x00000000749C0000-0x00000000749CB000-memory.dmp

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memory/4512-12-0x00000000749C0000-0x00000000749CB000-memory.dmp

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memory/4512-6-0x00000000749C0000-0x00000000749CB000-memory.dmp

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memory/4640-10-0x0000000000400000-0x000000000044B000-memory.dmp

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memory/4640-11-0x0000000000400000-0x000000000044B000-memory.dmp

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memory/4640-26-0x0000000074CD0000-0x0000000075480000-memory.dmp

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memory/4640-9-0x0000000000400000-0x000000000044B000-memory.dmp

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memory/4640-23-0x0000000000400000-0x000000000044B000-memory.dmp

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memory/4640-18-0x0000000004A90000-0x0000000004B2C000-memory.dmp

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memory/4640-17-0x0000000004980000-0x0000000004990000-memory.dmp

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memory/4640-16-0x00000000048F0000-0x0000000004902000-memory.dmp

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memory/4640-15-0x0000000004980000-0x0000000004990000-memory.dmp

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memory/4640-14-0x0000000074CD0000-0x0000000075480000-memory.dmp

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memory/4640-13-0x0000000000400000-0x000000000044B000-memory.dmp

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