asyncrat | 951530a346783029d60acf0aaaf52b5962c5bfed8a92542979335ed574f204f6

General

Target

ameerclient.exe
Size

48KB
MD5

12756d277802542acb80cbbe1d4e0f14
SHA1

bfc7adb73390cc71c57792f9855dd107e2e26e17
SHA256

951530a346783029d60acf0aaaf52b5962c5bfed8a92542979335ed574f204f6
SHA512

126875b1745d65fb7083adfe5a27662ce996ae673e475a0936503653cceccb8c2ae12ed481593074af4131b1deaf1c0475ccde66a51ef794acea8b50cf5c0793
SSDEEP

768:JukTVT0kLd3WULVPdVmo2qDGLfgSYPIUwCa0bwBciUBvYcFnlZ7ZgxErDTBDZIG+:JukTVT0M912FoSdUwUbwBc1fFgxErhdS

Score

10^/10

asyncrat zgrat 1877 rat

Malware Config

Extracted

Family

asyncrat

Version

Xoshnaw

Botnet

1877

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

127.0.0.1:1877

nerakar.duckdns.org:6606

nerakar.duckdns.org:7707

nerakar.duckdns.org:8808

nerakar.duckdns.org:1877

Mutex

3YeYWvX7BQIk

Attributes

delay
3
install
true
install_file
chroma.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Detect ZGRat V1 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2508-19-0x0000000006BD0000-0x0000000006C38000-memory.dmp	family_zgrat_v1

ZGRat
ZGRat is remote access trojan written in C#.
rat zgrat

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\chroma.exe	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

Processes:

ameerclient.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	ameerclient.exe

Executes dropped EXE 1 IoCs

Processes:

chroma.exe

pid process

2508 chroma.exe
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

4112 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

4696 timeout.exe

pid	process
2508	chroma.exe

pid	process
4112	schtasks.exe

pid	process
4696	timeout.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

ameerclient.exe

pid	process
1704	ameerclient.exe
1704	ameerclient.exe
1704	ameerclient.exe
1704	ameerclient.exe
1704	ameerclient.exe
1704	ameerclient.exe
1704	ameerclient.exe
1704	ameerclient.exe
1704	ameerclient.exe
1704	ameerclient.exe
1704	ameerclient.exe
1704	ameerclient.exe
1704	ameerclient.exe
1704	ameerclient.exe
1704	ameerclient.exe
1704	ameerclient.exe
1704	ameerclient.exe
1704	ameerclient.exe
1704	ameerclient.exe
1704	ameerclient.exe
1704	ameerclient.exe
1704	ameerclient.exe
1704	ameerclient.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

ameerclient.exechroma.exe

description pid process

Token: SeDebugPrivilege 1704 ameerclient.exe
Token: SeDebugPrivilege 2508 chroma.exe
Token: SeDebugPrivilege 2508 chroma.exe

description	pid	process
Token: SeDebugPrivilege	1704	ameerclient.exe
Token: SeDebugPrivilege	2508	chroma.exe
Token: SeDebugPrivilege	2508	chroma.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

ameerclient.execmd.execmd.exe

description	pid	process	target process
PID 1704 wrote to memory of 1068	1704	ameerclient.exe	cmd.exe
PID 1704 wrote to memory of 1068	1704	ameerclient.exe	cmd.exe
PID 1704 wrote to memory of 1068	1704	ameerclient.exe	cmd.exe
PID 1704 wrote to memory of 3680	1704	ameerclient.exe	cmd.exe
PID 1704 wrote to memory of 3680	1704	ameerclient.exe	cmd.exe
PID 1704 wrote to memory of 3680	1704	ameerclient.exe	cmd.exe
PID 3680 wrote to memory of 4696	3680	cmd.exe	timeout.exe
PID 3680 wrote to memory of 4696	3680	cmd.exe	timeout.exe
PID 3680 wrote to memory of 4696	3680	cmd.exe	timeout.exe
PID 1068 wrote to memory of 4112	1068	cmd.exe	schtasks.exe
PID 1068 wrote to memory of 4112	1068	cmd.exe	schtasks.exe
PID 1068 wrote to memory of 4112	1068	cmd.exe	schtasks.exe
PID 3680 wrote to memory of 2508	3680	cmd.exe	chroma.exe
PID 3680 wrote to memory of 2508	3680	cmd.exe	chroma.exe
PID 3680 wrote to memory of 2508	3680	cmd.exe	chroma.exe

C:\Users\Admin\AppData\Local\Temp\ameerclient.exe
"C:\Users\Admin\AppData\Local\Temp\ameerclient.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1704

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "chroma" /tr '"C:\Users\Admin\AppData\Roaming\chroma.exe"' & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:1068

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "chroma" /tr '"C:\Users\Admin\AppData\Roaming\chroma.exe"'
3⤵
- Creates scheduled task(s)
PID:4112

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5F46.tmp.bat""
2⤵
- Suspicious use of WriteProcessMemory
PID:3680

C:\Windows\SysWOW64\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:4696

C:\Users\Admin\AppData\Roaming\chroma.exe
"C:\Users\Admin\AppData\Roaming\chroma.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2508

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

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\tmp5F46.tmp.bat
Filesize
150B

MD5
0807f0a562edac63fedcdce1463be26f

SHA1
94aec47e3b6201c3bdc83d979f6a77182d525788

SHA256
203618652d7d9cc7c4496911fb143c73f10f2864f455ef922db8edb77922bbd4

SHA512
f0176b1fa33f9de7005dca23ed596275e8f022819eafdd1a9bf2f70b99dcd43056a4e92d4a21a0b61720e909b3f1783af7723bed36efb141dbd0162cde9cadb2

Download Submit
C:\Users\Admin\AppData\Roaming\chroma.exe
Filesize
48KB

MD5
12756d277802542acb80cbbe1d4e0f14

SHA1
bfc7adb73390cc71c57792f9855dd107e2e26e17

SHA256
951530a346783029d60acf0aaaf52b5962c5bfed8a92542979335ed574f204f6

SHA512
126875b1745d65fb7083adfe5a27662ce996ae673e475a0936503653cceccb8c2ae12ed481593074af4131b1deaf1c0475ccde66a51ef794acea8b50cf5c0793

Download Submit
memory/1704-3-0x0000000005010000-0x0000000005076000-memory.dmp

Filesize
408KB

Download
memory/1704-0-0x000000007470E000-0x000000007470F000-memory.dmp

Filesize
4KB

Download
memory/1704-4-0x00000000054E0000-0x000000000557C000-memory.dmp

Filesize
624KB

Download
memory/1704-9-0x0000000074700000-0x0000000074EB0000-memory.dmp

Filesize
7.7MB

Download
memory/1704-2-0x0000000074700000-0x0000000074EB0000-memory.dmp

Filesize
7.7MB

Download
memory/1704-1-0x0000000000670000-0x0000000000682000-memory.dmp

Filesize
72KB

Download
memory/2508-14-0x0000000074650000-0x0000000074E00000-memory.dmp

Filesize
7.7MB

Download
memory/2508-17-0x0000000006520000-0x0000000006AC4000-memory.dmp

Filesize
5.6MB

Download
memory/2508-19-0x0000000006BD0000-0x0000000006C38000-memory.dmp

Filesize
416KB

Download
memory/2508-18-0x0000000006C50000-0x0000000006CC6000-memory.dmp

Filesize
472KB

Download
memory/2508-20-0x0000000006D00000-0x0000000006D1E000-memory.dmp

Filesize
120KB

Download
memory/2508-21-0x0000000006EF0000-0x0000000006F82000-memory.dmp

Filesize
584KB

Download
memory/2508-22-0x0000000074650000-0x0000000074E00000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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