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 2 IoCs

resource	yara_rule
behavioral1/memory/3648-18-0x00000000069E0000-0x0000000006A48000-memory.dmp	family_zgrat_v1
behavioral1/memory/3648-21-0x00000000075B0000-0x0000000007618000-memory.dmp	family_zgrat_v1

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x000800000001ac07-12.dat	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-1-5-21-873560699-1074803302-2326074425-1000\Control Panel\International\Geo\Nation	chroma.exe

Executes dropped EXE 1 IoCs

pid	Process
3648	chroma.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\rescache\_merged\3720402701\1568373884.pri	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

pid	Process
1724	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4824	timeout.exe

Suspicious behavior: EnumeratesProcesses 15 IoCs

pid	Process
2908	ameerclient.exe
2908	ameerclient.exe
2908	ameerclient.exe
2908	ameerclient.exe
2908	ameerclient.exe
2908	ameerclient.exe
2908	ameerclient.exe
2908	ameerclient.exe
2908	ameerclient.exe
2908	ameerclient.exe
2908	ameerclient.exe
2908	ameerclient.exe
2908	ameerclient.exe
2908	ameerclient.exe
2908	ameerclient.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2908	ameerclient.exe
Token: SeDebugPrivilege	3648	chroma.exe
Token: SeDebugPrivilege	3648	chroma.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2908 wrote to memory of 916	2908	ameerclient.exe	75
PID 2908 wrote to memory of 916	2908	ameerclient.exe	75
PID 2908 wrote to memory of 916	2908	ameerclient.exe	75
PID 2908 wrote to memory of 5056	2908	ameerclient.exe	77
PID 2908 wrote to memory of 5056	2908	ameerclient.exe	77
PID 2908 wrote to memory of 5056	2908	ameerclient.exe	77
PID 916 wrote to memory of 1724	916	cmd.exe	79
PID 916 wrote to memory of 1724	916	cmd.exe	79
PID 916 wrote to memory of 1724	916	cmd.exe	79
PID 5056 wrote to memory of 4824	5056	cmd.exe	80
PID 5056 wrote to memory of 4824	5056	cmd.exe	80
PID 5056 wrote to memory of 4824	5056	cmd.exe	80
PID 5056 wrote to memory of 3648	5056	cmd.exe	81
PID 5056 wrote to memory of 3648	5056	cmd.exe	81
PID 5056 wrote to memory of 3648	5056	cmd.exe	81

C:\Users\Admin\AppData\Local\Temp\ameerclient.exe
"C:\Users\Admin\AppData\Local\Temp\ameerclient.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2908
- 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:916
- - 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:1724
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp88D7.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:5056
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:4824
- - C:\Users\Admin\AppData\Roaming\chroma.exe
    "C:\Users\Admin\AppData\Roaming\chroma.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Drops file in Windows directory
    - Suspicious use of AdjustPrivilegeToken
    PID:3648

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\tmp88D7.tmp.bat

Filesize
150B

MD5
411cdc7a1f7c5eea9db7d6d63731db62

SHA1
193752ae40bb0172e6ac283b38dfb499913f6733

SHA256
ebdcab210160ac3a32989529073e85533142700b4b7b2564f9ec291e158f136e

SHA512
73a4f14f8b9f647c6be524e5afbf65fc0f258811d67a7eec7ea3f935041a4711a562e1090a7b3f3e06f53c8adab04b491c00a1347de352cfa98b2389346dce2b

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

Filesize
48KB

MD5
12756d277802542acb80cbbe1d4e0f14

SHA1
bfc7adb73390cc71c57792f9855dd107e2e26e17

SHA256
951530a346783029d60acf0aaaf52b5962c5bfed8a92542979335ed574f204f6

SHA512
126875b1745d65fb7083adfe5a27662ce996ae673e475a0936503653cceccb8c2ae12ed481593074af4131b1deaf1c0475ccde66a51ef794acea8b50cf5c0793

Download Submit
memory/2908-3-0x0000000004DC0000-0x0000000004E26000-memory.dmp

Filesize
408KB

Download
memory/2908-0-0x0000000073B7E000-0x0000000073B7F000-memory.dmp

Filesize
4KB

Download
memory/2908-4-0x0000000005280000-0x000000000531C000-memory.dmp

Filesize
624KB

Download
memory/2908-9-0x0000000073B70000-0x000000007425E000-memory.dmp

Filesize
6.9MB

Download
memory/2908-2-0x0000000073B70000-0x000000007425E000-memory.dmp

Filesize
6.9MB

Download
memory/2908-1-0x00000000005B0000-0x00000000005C2000-memory.dmp

Filesize
72KB

Download
memory/3648-16-0x00000000061E0000-0x00000000066DE000-memory.dmp

Filesize
5.0MB

Download
memory/3648-17-0x0000000006A60000-0x0000000006AD6000-memory.dmp

Filesize
472KB

Download
memory/3648-18-0x00000000069E0000-0x0000000006A48000-memory.dmp

Filesize
416KB

Download
memory/3648-19-0x0000000006B20000-0x0000000006B3E000-memory.dmp

Filesize
120KB

Download
memory/3648-20-0x0000000006E20000-0x0000000006EB2000-memory.dmp

Filesize
584KB

Download
memory/3648-21-0x00000000075B0000-0x0000000007618000-memory.dmp

Filesize
416KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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