asyncrat | d021841d4a25bbe872ac7f71427e5731e441a9f6150f6ebb208c664d6ba48acd

Analysis

max time kernel
153s
max time network
161s
platform
windows7_x64
resource
win7-20220414-en
submitted
01-07-2022 09:51

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General

Target

Transferencias Copiar.jar
Size

287KB
MD5

513cc3544b4a0523218326b30e99b46b
SHA1

0927ad5ab4a30014fe0125793729ca9f8a74d95a
SHA256

d021841d4a25bbe872ac7f71427e5731e441a9f6150f6ebb208c664d6ba48acd
SHA512

fe435151e2d374858426777b95c18fb5590ab745815a43e58ad6ae4d6c19610895750d6cebcfc7341cedf6b3ed78c46db06b8d2b74ba889618a54222326a7ecf

Score

10^/10

asyncrat strrat default persistence rat stealer trojan

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

franmhort.duia.ro:8153

Mutex

Mutex_6SI8OkPnk

Attributes

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

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat
STRRAT
STRRAT is a remote access tool than can steal credentials and log keystrokes.
trojan stealer strrat

Async RAT payload 7 IoCs

rat

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\AsyncClient.exe	asyncrat
C:\Users\Admin\AppData\Roaming\AsyncClient.exe	asyncrat
behavioral1/memory/1388-87-0x00000000001C0000-0x00000000001D2000-memory.dmp	asyncrat
\Users\Admin\AppData\Roaming\win.exe	asyncrat
C:\Users\Admin\AppData\Roaming\win.exe	asyncrat
C:\Users\Admin\AppData\Roaming\win.exe	asyncrat
behavioral1/memory/1296-102-0x0000000001080000-0x0000000001092000-memory.dmp	asyncrat

Executes dropped EXE 2 IoCs

Processes:

AsyncClient.exewin.exe

pid process

1388 AsyncClient.exe
1296 win.exe
Drops startup file 1 IoCs

Processes:

java.exe

description ioc process

File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\arkhamqi.txt java.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

920 cmd.exe

pid	process
1388	AsyncClient.exe
1296	win.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\arkhamqi.txt	java.exe

pid	process
920	cmd.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

java.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows\CurrentVersion\Run\arkhamqi = "\"C:\\Users\\Admin\\AppData\\Roaming\\arkhamqi.txt\""	java.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\arkhamqi = "\"C:\\Users\\Admin\\AppData\\Roaming\\arkhamqi.txt\""	java.exe

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

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exeschtasks.exe

pid process

240 schtasks.exe
1112 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

1484 timeout.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

AsyncClient.exe

pid process

1388 AsyncClient.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

AsyncClient.exewin.exe

description pid process

Token: SeDebugPrivilege 1388 AsyncClient.exe
Token: SeDebugPrivilege 1296 win.exe

pid	process
240	schtasks.exe
1112	schtasks.exe

pid	process
1484	timeout.exe

pid	process
1388	AsyncClient.exe

description	pid	process
Token: SeDebugPrivilege	1388	AsyncClient.exe
Token: SeDebugPrivilege	1296	win.exe

Suspicious use of WriteProcessMemory 45 IoCs

Processes:

java.exewscript.exeWScript.exeAsyncClient.execmd.execmd.exejavaw.exejava.execmd.exe

description	pid	process	target process
PID 1948 wrote to memory of 1040	1948	java.exe	wscript.exe
PID 1948 wrote to memory of 1040	1948	java.exe	wscript.exe
PID 1948 wrote to memory of 1040	1948	java.exe	wscript.exe
PID 1040 wrote to memory of 860	1040	wscript.exe	WScript.exe
PID 1040 wrote to memory of 860	1040	wscript.exe	WScript.exe
PID 1040 wrote to memory of 860	1040	wscript.exe	WScript.exe
PID 1040 wrote to memory of 1056	1040	wscript.exe	javaw.exe
PID 1040 wrote to memory of 1056	1040	wscript.exe	javaw.exe
PID 1040 wrote to memory of 1056	1040	wscript.exe	javaw.exe
PID 860 wrote to memory of 1388	860	WScript.exe	AsyncClient.exe
PID 860 wrote to memory of 1388	860	WScript.exe	AsyncClient.exe
PID 860 wrote to memory of 1388	860	WScript.exe	AsyncClient.exe
PID 860 wrote to memory of 1388	860	WScript.exe	AsyncClient.exe
PID 1388 wrote to memory of 972	1388	AsyncClient.exe	cmd.exe
PID 1388 wrote to memory of 972	1388	AsyncClient.exe	cmd.exe
PID 1388 wrote to memory of 972	1388	AsyncClient.exe	cmd.exe
PID 1388 wrote to memory of 972	1388	AsyncClient.exe	cmd.exe
PID 1388 wrote to memory of 920	1388	AsyncClient.exe	cmd.exe
PID 1388 wrote to memory of 920	1388	AsyncClient.exe	cmd.exe
PID 1388 wrote to memory of 920	1388	AsyncClient.exe	cmd.exe
PID 1388 wrote to memory of 920	1388	AsyncClient.exe	cmd.exe
PID 972 wrote to memory of 1112	972	cmd.exe	schtasks.exe
PID 972 wrote to memory of 1112	972	cmd.exe	schtasks.exe
PID 972 wrote to memory of 1112	972	cmd.exe	schtasks.exe
PID 972 wrote to memory of 1112	972	cmd.exe	schtasks.exe
PID 920 wrote to memory of 1484	920	cmd.exe	timeout.exe
PID 920 wrote to memory of 1484	920	cmd.exe	timeout.exe
PID 920 wrote to memory of 1484	920	cmd.exe	timeout.exe
PID 920 wrote to memory of 1484	920	cmd.exe	timeout.exe
PID 920 wrote to memory of 1296	920	cmd.exe	win.exe
PID 920 wrote to memory of 1296	920	cmd.exe	win.exe
PID 920 wrote to memory of 1296	920	cmd.exe	win.exe
PID 920 wrote to memory of 1296	920	cmd.exe	win.exe
PID 1056 wrote to memory of 2044	1056	javaw.exe	java.exe
PID 1056 wrote to memory of 2044	1056	javaw.exe	java.exe
PID 1056 wrote to memory of 2044	1056	javaw.exe	java.exe
PID 2044 wrote to memory of 2036	2044	java.exe	cmd.exe
PID 2044 wrote to memory of 2036	2044	java.exe	cmd.exe
PID 2044 wrote to memory of 2036	2044	java.exe	cmd.exe
PID 2044 wrote to memory of 1356	2044	java.exe	java.exe
PID 2044 wrote to memory of 1356	2044	java.exe	java.exe
PID 2044 wrote to memory of 1356	2044	java.exe	java.exe
PID 2036 wrote to memory of 240	2036	cmd.exe	schtasks.exe
PID 2036 wrote to memory of 240	2036	cmd.exe	schtasks.exe
PID 2036 wrote to memory of 240	2036	cmd.exe	schtasks.exe

C:\Windows\system32\java.exe
java -jar "C:\Users\Admin\AppData\Local\Temp\Transferencias Copiar.jar"
1⤵
- Suspicious use of WriteProcessMemory
PID:1948

C:\Windows\system32\wscript.exe
wscript C:\Users\Admin\mjjrsmctby.js
2⤵
- Suspicious use of WriteProcessMemory
PID:1040

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\dHqmoqeAFb.js"
3⤵
- Suspicious use of WriteProcessMemory
PID:860

C:\Users\Admin\AppData\Roaming\AsyncClient.exe
"C:\Users\Admin\AppData\Roaming\AsyncClient.exe"
4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1388

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "win" /tr '"C:\Users\Admin\AppData\Roaming\win.exe"' & exit
5⤵
- Suspicious use of WriteProcessMemory
PID:972

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "win" /tr '"C:\Users\Admin\AppData\Roaming\win.exe"'
6⤵
- Creates scheduled task(s)
PID:1112

C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpBC4E.tmp.bat""
5⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:920

C:\Windows\SysWOW64\timeout.exe
timeout 3
6⤵
- Delays execution with timeout.exe
PID:1484

C:\Users\Admin\AppData\Roaming\win.exe
"C:\Users\Admin\AppData\Roaming\win.exe"
6⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1296

C:\Program Files\Java\jre7\bin\javaw.exe
"C:\Program Files\Java\jre7\bin\javaw.exe" -jar "C:\Users\Admin\AppData\Roaming\arkhamqi.txt"
3⤵
- Suspicious use of WriteProcessMemory
PID:1056

C:\Program Files\Java\jre7\bin\java.exe
"C:\Program Files\Java\jre7\bin\java.exe" -jar "C:\Users\Admin\arkhamqi.txt"
4⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2044

C:\Windows\system32\cmd.exe
cmd /c schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\arkhamqi.txt"
5⤵
- Suspicious use of WriteProcessMemory
PID:2036

C:\Windows\system32\schtasks.exe
schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\arkhamqi.txt"
6⤵
- Creates scheduled task(s)
PID:240

C:\Program Files\Java\jre7\bin\java.exe
"C:\Program Files\Java\jre7\bin\java.exe" -jar "C:\Users\Admin\AppData\Roaming\arkhamqi.txt"
5⤵
PID:1356

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpBC4E.tmp.bat
Filesize
147B

MD5
640985918c7a7538a155c072534da02a

SHA1
d24f2ba45d617ee1d5f5f73f25cd0569345bfe60

SHA256
95a9bd9cb9fb426996505f2a9078f5b65ac54096c6fbbfccab6f04b3e9158013

SHA512
74af364b8aa40c84ce1757bfaa50e1d2cf9e9a638e0a4db3d79eb196e6638d49cdac5b36ca9ab9aac175f458b29d0726f732a35f6331d00e04bf7eb8a5b82f59

Download Submit
C:\Users\Admin\AppData\Roaming\AsyncClient.exe
Filesize
45KB

MD5
cbdce3b5e2939fe92312004dcb31151f

SHA1
6f11f275c611decd4659f23a4593103f327806a6

SHA256
6ccc49875c2d837f462c4c3bd81f80b3be93f8435e8a22e042b5db025a31a6e3

SHA512
6240f21957016db0607987c81b110e78640d20eeba2dc0274cf6e6741cfd7924ca3b42325405e620f423157c34f355f188dbf60de96421e87f0d53e271fcc2c8

Download Submit
C:\Users\Admin\AppData\Roaming\AsyncClient.exe
Filesize
45KB

MD5
cbdce3b5e2939fe92312004dcb31151f

SHA1
6f11f275c611decd4659f23a4593103f327806a6

SHA256
6ccc49875c2d837f462c4c3bd81f80b3be93f8435e8a22e042b5db025a31a6e3

SHA512
6240f21957016db0607987c81b110e78640d20eeba2dc0274cf6e6741cfd7924ca3b42325405e620f423157c34f355f188dbf60de96421e87f0d53e271fcc2c8

Download Submit
C:\Users\Admin\AppData\Roaming\arkhamqi.txt
Filesize
164KB

MD5
f304dd37262f9ca635119593a2de3294

SHA1
25814c89b64922fdb5c5b1bdef0c2c79a855f1f6

SHA256
dc52c513cb3ededc96b362e314067a51b29cd848ed174361dce17a96e3f7bd3c

SHA512
71d9cbbde5c5e9d1bbb0e6244c5e7bb2bbb7e31062469ddf19ce5cf54806103af827bd76e99c8ce75f14b8189f6595511fb1a2c6166e2666360dcbe29e1fa287

Download Submit
C:\Users\Admin\AppData\Roaming\arkhamqi.txt
Filesize
164KB

MD5
f304dd37262f9ca635119593a2de3294

SHA1
25814c89b64922fdb5c5b1bdef0c2c79a855f1f6

SHA256
dc52c513cb3ededc96b362e314067a51b29cd848ed174361dce17a96e3f7bd3c

SHA512
71d9cbbde5c5e9d1bbb0e6244c5e7bb2bbb7e31062469ddf19ce5cf54806103af827bd76e99c8ce75f14b8189f6595511fb1a2c6166e2666360dcbe29e1fa287

Download Submit
C:\Users\Admin\AppData\Roaming\dHqmoqeAFb.js
Filesize
88KB

MD5
10431f8891bb9c5109b16fa0b113c3d5

SHA1
d88238c36eaf99364cb4839e16c2c50162e906c1

SHA256
726f9c6ad061a7f316ecfff034ef9e1916443d64d79007435a1e1bf101958994

SHA512
b3376e7f7d82125e031bc9a3f1b7a74add2591b5b6f8a1e3084775793fa548b20c1629e39b2a6b750eeac3cab668f0acd41671320e025e0c26c573d5ce63924e

Download Submit
C:\Users\Admin\AppData\Roaming\win.exe
Filesize
45KB

MD5
cbdce3b5e2939fe92312004dcb31151f

SHA1
6f11f275c611decd4659f23a4593103f327806a6

SHA256
6ccc49875c2d837f462c4c3bd81f80b3be93f8435e8a22e042b5db025a31a6e3

SHA512
6240f21957016db0607987c81b110e78640d20eeba2dc0274cf6e6741cfd7924ca3b42325405e620f423157c34f355f188dbf60de96421e87f0d53e271fcc2c8

Download Submit
C:\Users\Admin\AppData\Roaming\win.exe
Filesize
45KB

MD5
cbdce3b5e2939fe92312004dcb31151f

SHA1
6f11f275c611decd4659f23a4593103f327806a6

SHA256
6ccc49875c2d837f462c4c3bd81f80b3be93f8435e8a22e042b5db025a31a6e3

SHA512
6240f21957016db0607987c81b110e78640d20eeba2dc0274cf6e6741cfd7924ca3b42325405e620f423157c34f355f188dbf60de96421e87f0d53e271fcc2c8

Download Submit
C:\Users\Admin\arkhamqi.txt
Filesize
164KB

MD5
f304dd37262f9ca635119593a2de3294

SHA1
25814c89b64922fdb5c5b1bdef0c2c79a855f1f6

SHA256
dc52c513cb3ededc96b362e314067a51b29cd848ed174361dce17a96e3f7bd3c

SHA512
71d9cbbde5c5e9d1bbb0e6244c5e7bb2bbb7e31062469ddf19ce5cf54806103af827bd76e99c8ce75f14b8189f6595511fb1a2c6166e2666360dcbe29e1fa287

Download Submit
C:\Users\Admin\lib\jna-5.5.0.jar
Filesize
1.4MB

MD5
acfb5b5fd9ee10bf69497792fd469f85

SHA1
0e0845217c4907822403912ad6828d8e0b256208

SHA256
b308faebfe4ed409de8410e0a632d164b2126b035f6eacff968d3908cafb4d9e

SHA512
e52575f58a195ceb3bd16b9740eadf5bc5b1d4d63c0734e8e5fd1d1776aa2d068d2e4c7173b83803f95f72c0a6759ae1c9b65773c734250d4cfcdf47a19f82aa

Download Submit
C:\Users\Admin\lib\jna-platform-5.5.0.jar
Filesize
2.6MB

MD5
2f4a99c2758e72ee2b59a73586a2322f

SHA1
af38e7c4d0fc73c23ecd785443705bfdee5b90bf

SHA256
24d81621f82ac29fcdd9a74116031f5907a2343158e616f4573bbfa2434ae0d5

SHA512
b860459a0d3bf7ccb600a03aa1d2ac0358619ee89b2b96ed723541e182b6fdab53aefef7992acb4e03fca67aa47cbe3907b1e6060a60b57ed96c4e00c35c7494

Download Submit
C:\Users\Admin\lib\sqlite-jdbc-3.14.2.1.jar
Filesize
4.1MB

MD5
b33387e15ab150a7bf560abdc73c3bec

SHA1
66b8075784131f578ef893fd7674273f709b9a4c

SHA256
2eae3dea1c3dde6104c49f9601074b6038ff6abcf3be23f4b56f6720a4f6a491

SHA512
25cfb0d6ce35d0bcb18527d3aa12c63ecb2d9c1b8b78805d1306e516c13480b79bb0d74730aa93bd1752f9ac2da9fdd51781c48844cea2fd52a06c62852c8279

Download Submit
C:\Users\Admin\lib\system-hook-3.5.jar
Filesize
772KB

MD5
e1aa38a1e78a76a6de73efae136cdb3a

SHA1
c463da71871f780b2e2e5dba115d43953b537daf

SHA256
2ddda8af6faef8bde46acf43ec546603180bcf8dcb2e5591fff8ac9cd30b5609

SHA512
fee16fe9364926ec337e52f551fd62ed81984808a847de2fd68ff29b6c5da0dcc04ef6d8977f0fe675662a7d2ea1065cdcdd2a5259446226a7c7c5516bd7d60d

Download Submit
C:\Users\Admin\mjjrsmctby.js
Filesize
480KB

MD5
db0c97c4781ea7c7f09de49fc0d7aa6b

SHA1
f36740c3b50cd17e7d679fd5386eb60e2505288e

SHA256
a58951a7f9087e40b330ee667c84fc12e884ad609c60450fd6a34e4db16ea559

SHA512
6f00a0ec3df2dd6ee0c501d5617b9237cf689753ec06003305ec7f097b9be01bfce86bff949eaab9cdd45e6edaceb37aff1cf3b0dbeeb30b61c04b2f3d7f7349

Download Submit
\Users\Admin\AppData\Roaming\win.exe
Filesize
45KB

MD5
cbdce3b5e2939fe92312004dcb31151f

SHA1
6f11f275c611decd4659f23a4593103f327806a6

SHA256
6ccc49875c2d837f462c4c3bd81f80b3be93f8435e8a22e042b5db025a31a6e3

SHA512
6240f21957016db0607987c81b110e78640d20eeba2dc0274cf6e6741cfd7924ca3b42325405e620f423157c34f355f188dbf60de96421e87f0d53e271fcc2c8

Download Submit
memory/240-123-0x0000000000000000-mapping.dmp

Download
memory/860-69-0x0000000000000000-mapping.dmp

Download
memory/920-91-0x0000000000000000-mapping.dmp

Download
memory/972-90-0x0000000000000000-mapping.dmp

Download
memory/1040-65-0x0000000000000000-mapping.dmp

Download
memory/1056-72-0x0000000000000000-mapping.dmp

Download
memory/1056-88-0x0000000002230000-0x0000000005230000-memory.dmp

Filesize
48.0MB

Download
memory/1112-92-0x0000000000000000-mapping.dmp

Download
memory/1296-100-0x0000000000000000-mapping.dmp

Download
memory/1296-102-0x0000000001080000-0x0000000001092000-memory.dmp

Filesize
72KB

Download
memory/1356-136-0x0000000002260000-0x0000000005260000-memory.dmp

Filesize
48.0MB

Download
memory/1356-131-0x0000000002260000-0x0000000005260000-memory.dmp

Filesize
48.0MB

Download
memory/1356-122-0x0000000000000000-mapping.dmp

Download
memory/1388-89-0x0000000075401000-0x0000000075403000-memory.dmp

Filesize
8KB

Download
memory/1388-74-0x0000000000000000-mapping.dmp

Download
memory/1388-87-0x00000000001C0000-0x00000000001D2000-memory.dmp

Filesize
72KB

Download
memory/1484-94-0x0000000000000000-mapping.dmp

Download
memory/1948-54-0x000007FEFC021000-0x000007FEFC023000-memory.dmp

Filesize
8KB

Download
memory/1948-61-0x0000000002080000-0x0000000005080000-memory.dmp

Filesize
48.0MB

Download
memory/2036-121-0x0000000000000000-mapping.dmp

Download
memory/2044-113-0x00000000020B0000-0x00000000050B0000-memory.dmp

Filesize
48.0MB

Download
memory/2044-103-0x0000000000000000-mapping.dmp

Download