asyncrat | 3f88c9843cb12cb83e1428bd4518a62f6e057904d065a1ff379f4173fc238d50

General

Target

5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe
Size

220KB
MD5

5b0eec2cad9696c56031231cd3aadfe7
SHA1

f89faf0532fcef570a12dc14c9ecec5cded37d1b
SHA256

3f88c9843cb12cb83e1428bd4518a62f6e057904d065a1ff379f4173fc238d50
SHA512

eb368a9a030120e89be4881ee28defe381135b5e9be42dbdbe858d9b97c7f359e0d7a692c457375378f020fe8e18cad98c70e2bd8c0cdb3fdfef22b7a51a17ff
SSDEEP

3072:tVUmiLbThQWh4gSPqMcFr1TIVBbF/WmzoaVaBvWRHLQiydGKzrulc0POiwLw9YG:knLbNsg6EzTI7J/poa0BeRQi9YC/POyZ

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

mr7bashbab.ddns.net:6606

mr7bashbab.ddns.net:7707

mr7bashbab.ddns.net:8808

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
OBS.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/4892-3-0x00000000028C0000-0x00000000028D2000-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-1-5-21-384068567-2943195810-3631207890-1000\Control Panel\International\Geo\Nation	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe

Executes dropped EXE 1 IoCs

pid	Process
2392	OBS.exe

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

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3428	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
3884	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4892	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe
4892	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe
4892	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe
4892	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe
4892	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe
4892	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe
4892	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe
4892	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe
4892	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe
4892	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe
4892	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe
4892	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe
4892	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe
4892	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe
4892	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe
4892	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe
4892	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe
4892	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe
4892	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe
4892	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe
4892	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe
4892	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe
4892	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4892	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe
Token: SeDebugPrivilege	2392	OBS.exe
Token: SeDebugPrivilege	2392	OBS.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4892 wrote to memory of 4460	4892	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe	91
PID 4892 wrote to memory of 4460	4892	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe	91
PID 4892 wrote to memory of 4460	4892	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe	91
PID 4892 wrote to memory of 3356	4892	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe	93
PID 4892 wrote to memory of 3356	4892	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe	93
PID 4892 wrote to memory of 3356	4892	5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe	93
PID 4460 wrote to memory of 3884	4460	cmd.exe	95
PID 4460 wrote to memory of 3884	4460	cmd.exe	95
PID 4460 wrote to memory of 3884	4460	cmd.exe	95
PID 3356 wrote to memory of 3428	3356	cmd.exe	96
PID 3356 wrote to memory of 3428	3356	cmd.exe	96
PID 3356 wrote to memory of 3428	3356	cmd.exe	96
PID 3356 wrote to memory of 2392	3356	cmd.exe	98
PID 3356 wrote to memory of 2392	3356	cmd.exe	98
PID 3356 wrote to memory of 2392	3356	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\5b0eec2cad9696c56031231cd3aadfe7_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4892
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "OBS" /tr '"C:\Users\Admin\AppData\Roaming\OBS.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4460
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "OBS" /tr '"C:\Users\Admin\AppData\Roaming\OBS.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3884
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpC479.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3356
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3428
- - C:\Users\Admin\AppData\Roaming\OBS.exe
    "C:\Users\Admin\AppData\Roaming\OBS.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2392

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpC479.tmp.bat

Filesize
147B

MD5
64ce6c7ca2e38324183af712a10d4691

SHA1
f82af7065019f72670a1ea39cdf5164d9034ec5c

SHA256
dd627fdc154744cd10ac7df53ddf65b1ec2625446c6023da47b28ae9416b5c0a

SHA512
881dcdb11462671f1d90c5fb2b2abbeb5458a8d0780a8cf6a0e109beebf747a24ff0bab9f2575dfccaa233ff6cf5fe6c3061750569f7802bc9613424ed9ce0aa

Download Submit
C:\Users\Admin\AppData\Roaming\OBS.exe

Filesize
220KB

MD5
5b0eec2cad9696c56031231cd3aadfe7

SHA1
f89faf0532fcef570a12dc14c9ecec5cded37d1b

SHA256
3f88c9843cb12cb83e1428bd4518a62f6e057904d065a1ff379f4173fc238d50

SHA512
eb368a9a030120e89be4881ee28defe381135b5e9be42dbdbe858d9b97c7f359e0d7a692c457375378f020fe8e18cad98c70e2bd8c0cdb3fdfef22b7a51a17ff

Download Submit
memory/2392-14-0x0000000074A10000-0x00000000751C0000-memory.dmp

Filesize
7.7MB

Download
memory/2392-15-0x0000000074A10000-0x00000000751C0000-memory.dmp

Filesize
7.7MB

Download
memory/2392-16-0x0000000074A10000-0x00000000751C0000-memory.dmp

Filesize
7.7MB

Download
memory/4892-0-0x0000000074A1E000-0x0000000074A1F000-memory.dmp

Filesize
4KB

Download
memory/4892-1-0x0000000000440000-0x000000000044E000-memory.dmp

Filesize
56KB

Download
memory/4892-2-0x0000000004DE0000-0x0000000004E7C000-memory.dmp

Filesize
624KB

Download
memory/4892-3-0x00000000028C0000-0x00000000028D2000-memory.dmp

Filesize
72KB

Download
memory/4892-4-0x0000000074A10000-0x00000000751C0000-memory.dmp

Filesize
7.7MB

Download
memory/4892-9-0x0000000074A10000-0x00000000751C0000-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