asyncrat | 9dbb9ba5a01a654a21d899aef6594ee5fc0b4d0ac68a3c97ec52ef6a8959f27d

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
13/07/2024, 19:35

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General

Target
430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe
Size 562KB
Sample240713-ya35cswgmd
SHA256 9dbb9ba5a01a654a21d899aef6594ee5fc0b4d0ac68a3c97ec52ef6a8959f27d
MD5 430e7cce721d74347a9a7ac87a9a9ec1
SHA1 b03b248c279d9e05988c0cd87aa405e9ae55f0e2
SHA512 69ad4bd2e3ac61d596ae4ab65abe41128bf8a74cd7366f5f6584d1bccdb4e6ef6ae95dc846917a1fb5fc2fcb680ebcd677b85444e5b7f0c663381885edf5fc0b
SSDEEP 12288:X63MOeq3A7EEqsGh3S8CbZJscjIcKvKJNY8lYfIeXQhzMhi1:X21e6yqsGNdCbZeZo8AhzM41
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

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/3112-3-0x0000000005500000-0x0000000005528000-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	430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe

Executes dropped EXE 1 IoCs

pid	Process
916	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
2172	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
380	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
3112	430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe
3112	430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe
3112	430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe
3112	430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe
3112	430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe
3112	430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe
3112	430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe
3112	430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe
3112	430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe
3112	430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe
3112	430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe
3112	430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe
3112	430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe
3112	430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe
3112	430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe
3112	430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe
3112	430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe
3112	430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe
3112	430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe
3112	430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe
3112	430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3112	430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe
Token: SeDebugPrivilege	916	OBS.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3112 wrote to memory of 2572	3112	430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe	89
PID 3112 wrote to memory of 2572	3112	430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe	89
PID 3112 wrote to memory of 2572	3112	430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe	89
PID 3112 wrote to memory of 3068	3112	430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe	91
PID 3112 wrote to memory of 3068	3112	430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe	91
PID 3112 wrote to memory of 3068	3112	430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe	91
PID 2572 wrote to memory of 380	2572	cmd.exe	93
PID 2572 wrote to memory of 380	2572	cmd.exe	93
PID 2572 wrote to memory of 380	2572	cmd.exe	93
PID 3068 wrote to memory of 2172	3068	cmd.exe	94
PID 3068 wrote to memory of 2172	3068	cmd.exe	94
PID 3068 wrote to memory of 2172	3068	cmd.exe	94
PID 3068 wrote to memory of 916	3068	cmd.exe	95
PID 3068 wrote to memory of 916	3068	cmd.exe	95
PID 3068 wrote to memory of 916	3068	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\430e7cce721d74347a9a7ac87a9a9ec1_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3112
- 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:2572
- - 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:380
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpAE22.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3068
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2172
- - C:\Users\Admin\AppData\Roaming\OBS.exe
    "C:\Users\Admin\AppData\Roaming\OBS.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:916

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tmpAE22.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpAE22.tmp.bat
Size 147B
SHA256 509ad80e60dd219a58b69b40ff8eee841dcd699d0a5415614cb47cabb3019884
MD5 75bf7e71304f9298dcccb2d563209440
SHA1 8f6d17b8d29caf57971fea0c639722e4877a44db
SHA512 1724a7b15270d76859bc9aca7e51d919ef557638183d3eb904803200de5dcf473d2af74a3745d796f6fe43a719e4b0e9026e795222348d910569841b060d6741
MD5 SHA1 SHA512

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OBS.exe

Path C:\Users\Admin\AppData\Roaming\OBS.exe
Size 562KB
SHA256 9dbb9ba5a01a654a21d899aef6594ee5fc0b4d0ac68a3c97ec52ef6a8959f27d
MD5 430e7cce721d74347a9a7ac87a9a9ec1
SHA1 b03b248c279d9e05988c0cd87aa405e9ae55f0e2
SHA512 69ad4bd2e3ac61d596ae4ab65abe41128bf8a74cd7366f5f6584d1bccdb4e6ef6ae95dc846917a1fb5fc2fcb680ebcd677b85444e5b7f0c663381885edf5fc0b
SSDEEP 12288:X63MOeq3A7EEqsGh3S8CbZJscjIcKvKJNY8lYfIeXQhzMhi1:X21e6yqsGNdCbZeZo8AhzM41
MD5 SHA1 SHA512 SSDEEP

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memory/916-14-0x0000000074840000-0x0000000074FF0000-memory.dmp

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memory/916-15-0x0000000074840000-0x0000000074FF0000-memory.dmp

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memory/916-16-0x0000000074840000-0x0000000074FF0000-memory.dmp

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memory/916-17-0x0000000074840000-0x0000000074FF0000-memory.dmp

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memory/3112-0-0x000000007485E000-0x000000007485F000-memory.dmp

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memory/3112-1-0x0000000000BE0000-0x0000000000BE8000-memory.dmp

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memory/3112-2-0x0000000005600000-0x000000000569C000-memory.dmp

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memory/3112-3-0x0000000005500000-0x0000000005528000-memory.dmp

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memory/3112-4-0x0000000074850000-0x0000000075000000-memory.dmp

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memory/3112-9-0x0000000074850000-0x0000000075000000-memory.dmp

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