asyncrat | 7158cb26fb5a843496b92e30c4366fdfa2b49cd8c59f280ee71e853a68ef0a69

Analysis

max time kernel
147s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
22-03-2023 19:01

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General

Target

Odeme3222023.scr.exe
Size

635KB
MD5

02e24e9cfe0669ac85121b1b35f7a942
SHA1

0acb91424c9e6329b0966177cc5541f0bb2c4908
SHA256

7158cb26fb5a843496b92e30c4366fdfa2b49cd8c59f280ee71e853a68ef0a69
SHA512

cc697818469e535cdb3d9470bb25d38f8d845d668d50e72b61911bd561d94ffff5e04448fda4537bba28fb5666345b1fc748b1f80443c54bac6ca191df4de013
SSDEEP

12288:NcrNS33L10QdrXjCDn1R6WlM96zWDfJbZEvJmD7ugVkh/fwJ6DD:wNA3R5drX2D1RTM9aEfJbUYD79ofJDD

Score

10^/10

asyncrat mnock rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Mnock

mooroopecamroy.sytes.net:1452

mooroopecamroy.sytes.net:1432

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
crssi.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

Processes:

resource	yara_rule
behavioral2/memory/2296-162-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Checks computer location settings 2 TTPs 3 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

Odeme3222023.scr.exekopjlkjo.sfx.exekopjlkjo.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation	Odeme3222023.scr.exe
Key value queried	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation	kopjlkjo.sfx.exe
Key value queried	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation	kopjlkjo.exe

Executes dropped EXE 5 IoCs

Processes:

kopjlkjo.sfx.exekopjlkjo.exekopjlkjo.execrssi.execrssi.exe

pid process

4080 kopjlkjo.sfx.exe
3160 kopjlkjo.exe
2296 kopjlkjo.exe
1152 crssi.exe
1028 crssi.exe

pid	process
4080	kopjlkjo.sfx.exe
3160	kopjlkjo.exe
2296	kopjlkjo.exe
1152	crssi.exe
1028	crssi.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

kopjlkjo.execrssi.exe

description	pid	process	target process
PID 3160 set thread context of 2296	3160	kopjlkjo.exe	kopjlkjo.exe
PID 1152 set thread context of 1028	1152	crssi.exe	crssi.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 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

1620 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

4756 timeout.exe

pid	process
1620	schtasks.exe

pid	process
4756	timeout.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

kopjlkjo.exe

pid	process
2296	kopjlkjo.exe
2296	kopjlkjo.exe
2296	kopjlkjo.exe
2296	kopjlkjo.exe
2296	kopjlkjo.exe
2296	kopjlkjo.exe
2296	kopjlkjo.exe
2296	kopjlkjo.exe
2296	kopjlkjo.exe
2296	kopjlkjo.exe
2296	kopjlkjo.exe
2296	kopjlkjo.exe
2296	kopjlkjo.exe
2296	kopjlkjo.exe
2296	kopjlkjo.exe
2296	kopjlkjo.exe
2296	kopjlkjo.exe
2296	kopjlkjo.exe
2296	kopjlkjo.exe
2296	kopjlkjo.exe
2296	kopjlkjo.exe
2296	kopjlkjo.exe
2296	kopjlkjo.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

kopjlkjo.exekopjlkjo.execrssi.execrssi.exe

description	pid	process
Token: SeDebugPrivilege	3160	kopjlkjo.exe
Token: SeDebugPrivilege	2296	kopjlkjo.exe
Token: SeDebugPrivilege	1152	crssi.exe
Token: SeDebugPrivilege	1028	crssi.exe

Suspicious use of WriteProcessMemory 40 IoCs

Processes:

Odeme3222023.scr.execmd.exekopjlkjo.sfx.exekopjlkjo.exekopjlkjo.execmd.execmd.execrssi.exe

description	pid	process	target process
PID 4964 wrote to memory of 4180	4964	Odeme3222023.scr.exe	cmd.exe
PID 4964 wrote to memory of 4180	4964	Odeme3222023.scr.exe	cmd.exe
PID 4964 wrote to memory of 4180	4964	Odeme3222023.scr.exe	cmd.exe
PID 4180 wrote to memory of 4080	4180	cmd.exe	kopjlkjo.sfx.exe
PID 4180 wrote to memory of 4080	4180	cmd.exe	kopjlkjo.sfx.exe
PID 4180 wrote to memory of 4080	4180	cmd.exe	kopjlkjo.sfx.exe
PID 4080 wrote to memory of 3160	4080	kopjlkjo.sfx.exe	kopjlkjo.exe
PID 4080 wrote to memory of 3160	4080	kopjlkjo.sfx.exe	kopjlkjo.exe
PID 4080 wrote to memory of 3160	4080	kopjlkjo.sfx.exe	kopjlkjo.exe
PID 3160 wrote to memory of 2296	3160	kopjlkjo.exe	kopjlkjo.exe
PID 3160 wrote to memory of 2296	3160	kopjlkjo.exe	kopjlkjo.exe
PID 3160 wrote to memory of 2296	3160	kopjlkjo.exe	kopjlkjo.exe
PID 3160 wrote to memory of 2296	3160	kopjlkjo.exe	kopjlkjo.exe
PID 3160 wrote to memory of 2296	3160	kopjlkjo.exe	kopjlkjo.exe
PID 3160 wrote to memory of 2296	3160	kopjlkjo.exe	kopjlkjo.exe
PID 3160 wrote to memory of 2296	3160	kopjlkjo.exe	kopjlkjo.exe
PID 3160 wrote to memory of 2296	3160	kopjlkjo.exe	kopjlkjo.exe
PID 2296 wrote to memory of 3952	2296	kopjlkjo.exe	cmd.exe
PID 2296 wrote to memory of 3952	2296	kopjlkjo.exe	cmd.exe
PID 2296 wrote to memory of 3952	2296	kopjlkjo.exe	cmd.exe
PID 2296 wrote to memory of 2652	2296	kopjlkjo.exe	cmd.exe
PID 2296 wrote to memory of 2652	2296	kopjlkjo.exe	cmd.exe
PID 2296 wrote to memory of 2652	2296	kopjlkjo.exe	cmd.exe
PID 2652 wrote to memory of 4756	2652	cmd.exe	timeout.exe
PID 2652 wrote to memory of 4756	2652	cmd.exe	timeout.exe
PID 2652 wrote to memory of 4756	2652	cmd.exe	timeout.exe
PID 3952 wrote to memory of 1620	3952	cmd.exe	schtasks.exe
PID 3952 wrote to memory of 1620	3952	cmd.exe	schtasks.exe
PID 3952 wrote to memory of 1620	3952	cmd.exe	schtasks.exe
PID 2652 wrote to memory of 1152	2652	cmd.exe	crssi.exe
PID 2652 wrote to memory of 1152	2652	cmd.exe	crssi.exe
PID 2652 wrote to memory of 1152	2652	cmd.exe	crssi.exe
PID 1152 wrote to memory of 1028	1152	crssi.exe	crssi.exe
PID 1152 wrote to memory of 1028	1152	crssi.exe	crssi.exe
PID 1152 wrote to memory of 1028	1152	crssi.exe	crssi.exe
PID 1152 wrote to memory of 1028	1152	crssi.exe	crssi.exe
PID 1152 wrote to memory of 1028	1152	crssi.exe	crssi.exe
PID 1152 wrote to memory of 1028	1152	crssi.exe	crssi.exe
PID 1152 wrote to memory of 1028	1152	crssi.exe	crssi.exe
PID 1152 wrote to memory of 1028	1152	crssi.exe	crssi.exe

C:\Users\Admin\AppData\Local\Temp\Odeme3222023.scr.exe
"C:\Users\Admin\AppData\Local\Temp\Odeme3222023.scr.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4964

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\iliychjo.cmd" "
2⤵
- Suspicious use of WriteProcessMemory
PID:4180

C:\Users\Admin\AppData\Local\Temp\kopjlkjo.sfx.exe
kopjlkjo.sfx.exe -dC:\Users\Admin\AppData\Local\Temp -pmheutdbtrfcaszjnhjfehfegddeoqxapofdgyayhdqboofhafugBbshhddfdtgxdkqekecVohobthtigdge
3⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:4080

C:\Users\Admin\AppData\Local\Temp\kopjlkjo.exe
"C:\Users\Admin\AppData\Local\Temp\kopjlkjo.exe"
4⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3160

C:\Users\Admin\AppData\Local\Temp\kopjlkjo.exe
C:\Users\Admin\AppData\Local\Temp\kopjlkjo.exe
5⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2296

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "crssi" /tr '"C:\Users\Admin\AppData\Roaming\crssi.exe"' & exit
6⤵
- Suspicious use of WriteProcessMemory
PID:3952

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "crssi" /tr '"C:\Users\Admin\AppData\Roaming\crssi.exe"'
7⤵
- Creates scheduled task(s)
PID:1620

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp1879.tmp.bat""
6⤵
- Suspicious use of WriteProcessMemory
PID:2652

C:\Windows\SysWOW64\timeout.exe
timeout 3
7⤵
- Delays execution with timeout.exe
PID:4756

C:\Users\Admin\AppData\Roaming\crssi.exe
"C:\Users\Admin\AppData\Roaming\crssi.exe"
7⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1152

C:\Users\Admin\AppData\Roaming\crssi.exe
C:\Users\Admin\AppData\Roaming\crssi.exe
8⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1028

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\crssi.exe.log
Filesize
706B

MD5
d95c58e609838928f0f49837cab7dfd2

SHA1
55e7139a1e3899195b92ed8771d1ca2c7d53c916

SHA256
0407c814aef0d62aec7fd39b7c2f614746f0d8ff41f8ef957736f520f14b0339

SHA512
405310b29a833604c6627063bfdcf055a197e01f633ef21da238f1a6415a02e21315d689b4a6669db23e82152bed6f3492afb60963e6b2a0e9bb2ac09a480b5d

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\kopjlkjo.exe.log
Filesize
706B

MD5
d95c58e609838928f0f49837cab7dfd2

SHA1
55e7139a1e3899195b92ed8771d1ca2c7d53c916

SHA256
0407c814aef0d62aec7fd39b7c2f614746f0d8ff41f8ef957736f520f14b0339

SHA512
405310b29a833604c6627063bfdcf055a197e01f633ef21da238f1a6415a02e21315d689b4a6669db23e82152bed6f3492afb60963e6b2a0e9bb2ac09a480b5d

Download Submit
C:\Users\Admin\AppData\Local\Temp\iliychjo.cmd
Filesize
10KB

MD5
5c6c1129a2ec722e4067d9fb09369799

SHA1
afab2aeb341a719dad8b48f542f7fb966a38c30c

SHA256
a9b935bb8953156779753ee2cd340e3e06428120c74003ac5a6570542e7f0f9f

SHA512
e86c174b327cc8c2ab3a9b5ef68ae308468a1113b905c8f3d5d0b7f031b4166eef933e26a1796bc44deac02004cc15ee1e1cf0529ec814e6dc5e959e30df0c86

Download Submit
C:\Users\Admin\AppData\Local\Temp\kopjlkjo.exe
Filesize
227KB

MD5
7f27d1f429639580c990c1dfd54647a7

SHA1
909e835639c112c37fbbc89af0ab7dd5c8ed07e3

SHA256
a89a861186beea53d2b2638256f81149e6faa4e1f41cb8307de5452ef844d4ff

SHA512
d912502b4be34c74aa72f72c54e51c9447feb160201f7aa013e7c5b3214269347bc91175c663b6a16ba42e7b5d86520276a5927b9f065d2b2ffdcbb178690f3b

Download Submit
C:\Users\Admin\AppData\Local\Temp\kopjlkjo.exe
Filesize
227KB

MD5
7f27d1f429639580c990c1dfd54647a7

SHA1
909e835639c112c37fbbc89af0ab7dd5c8ed07e3

SHA256
a89a861186beea53d2b2638256f81149e6faa4e1f41cb8307de5452ef844d4ff

SHA512
d912502b4be34c74aa72f72c54e51c9447feb160201f7aa013e7c5b3214269347bc91175c663b6a16ba42e7b5d86520276a5927b9f065d2b2ffdcbb178690f3b

Download Submit
C:\Users\Admin\AppData\Local\Temp\kopjlkjo.exe
Filesize
227KB

MD5
7f27d1f429639580c990c1dfd54647a7

SHA1
909e835639c112c37fbbc89af0ab7dd5c8ed07e3

SHA256
a89a861186beea53d2b2638256f81149e6faa4e1f41cb8307de5452ef844d4ff

SHA512
d912502b4be34c74aa72f72c54e51c9447feb160201f7aa013e7c5b3214269347bc91175c663b6a16ba42e7b5d86520276a5927b9f065d2b2ffdcbb178690f3b

Download Submit
C:\Users\Admin\AppData\Local\Temp\kopjlkjo.exe
Filesize
227KB

MD5
7f27d1f429639580c990c1dfd54647a7

SHA1
909e835639c112c37fbbc89af0ab7dd5c8ed07e3

SHA256
a89a861186beea53d2b2638256f81149e6faa4e1f41cb8307de5452ef844d4ff

SHA512
d912502b4be34c74aa72f72c54e51c9447feb160201f7aa013e7c5b3214269347bc91175c663b6a16ba42e7b5d86520276a5927b9f065d2b2ffdcbb178690f3b

Download Submit
C:\Users\Admin\AppData\Local\Temp\kopjlkjo.sfx.exe
Filesize
446KB

MD5
a70ce8a186b33c8dbad85d8717f97574

SHA1
c3b041e092a2816f7e969913e44a96646762d7a1

SHA256
83b8efd5fd67b4f6afa96daccd6fac873f9d2f09dd6cfb50febbd2d0543f6a6b

SHA512
76cf4426aaf7a9ac7be55c1276607b2abab37c85412b959a1437ef2d80de2ebd94ba6f1a134d5affb2ec6e78900afcd9d001072957b64314aadf34a2ff82e9fb

Download Submit
C:\Users\Admin\AppData\Local\Temp\kopjlkjo.sfx.exe
Filesize
446KB

MD5
a70ce8a186b33c8dbad85d8717f97574

SHA1
c3b041e092a2816f7e969913e44a96646762d7a1

SHA256
83b8efd5fd67b4f6afa96daccd6fac873f9d2f09dd6cfb50febbd2d0543f6a6b

SHA512
76cf4426aaf7a9ac7be55c1276607b2abab37c85412b959a1437ef2d80de2ebd94ba6f1a134d5affb2ec6e78900afcd9d001072957b64314aadf34a2ff82e9fb

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp1879.tmp.bat
Filesize
149B

MD5
b0f0b2722740adc87634e95dad1edb9d

SHA1
4e9a6ecd2f545553f27f0bbce77ffff1db0f3885

SHA256
5615e6ab8bdfab5992ecf63657bf57dda4346e666f158963146067f5fa748c60

SHA512
dbdfb723702b9b644dd9517a46a687823b1ad32fa20080326c0a64faae83d263f6fcfafee61a8ae2c5be065212736421a85a32fcb42ebbe535b0fe1523be9f28

Download Submit
C:\Users\Admin\AppData\Roaming\crssi.exe
Filesize
227KB

MD5
7f27d1f429639580c990c1dfd54647a7

SHA1
909e835639c112c37fbbc89af0ab7dd5c8ed07e3

SHA256
a89a861186beea53d2b2638256f81149e6faa4e1f41cb8307de5452ef844d4ff

SHA512
d912502b4be34c74aa72f72c54e51c9447feb160201f7aa013e7c5b3214269347bc91175c663b6a16ba42e7b5d86520276a5927b9f065d2b2ffdcbb178690f3b

Download Submit
C:\Users\Admin\AppData\Roaming\crssi.exe
Filesize
227KB

MD5
7f27d1f429639580c990c1dfd54647a7

SHA1
909e835639c112c37fbbc89af0ab7dd5c8ed07e3

SHA256
a89a861186beea53d2b2638256f81149e6faa4e1f41cb8307de5452ef844d4ff

SHA512
d912502b4be34c74aa72f72c54e51c9447feb160201f7aa013e7c5b3214269347bc91175c663b6a16ba42e7b5d86520276a5927b9f065d2b2ffdcbb178690f3b

Download Submit
C:\Users\Admin\AppData\Roaming\crssi.exe
Filesize
227KB

MD5
7f27d1f429639580c990c1dfd54647a7

SHA1
909e835639c112c37fbbc89af0ab7dd5c8ed07e3

SHA256
a89a861186beea53d2b2638256f81149e6faa4e1f41cb8307de5452ef844d4ff

SHA512
d912502b4be34c74aa72f72c54e51c9447feb160201f7aa013e7c5b3214269347bc91175c663b6a16ba42e7b5d86520276a5927b9f065d2b2ffdcbb178690f3b

Download Submit
memory/1028-180-0x00000000056D0000-0x00000000056E0000-memory.dmp

Filesize
64KB

Download
memory/1028-181-0x00000000056D0000-0x00000000056E0000-memory.dmp

Filesize
64KB

Download
memory/1152-175-0x00000000032D0000-0x00000000032E0000-memory.dmp

Filesize
64KB

Download
memory/2296-162-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2296-166-0x00000000051B0000-0x00000000051C0000-memory.dmp

Filesize
64KB

Download
memory/2296-167-0x00000000052C0000-0x0000000005326000-memory.dmp

Filesize
408KB

Download
memory/3160-161-0x000000000E380000-0x000000000E412000-memory.dmp

Filesize
584KB

Download
memory/3160-160-0x000000000E890000-0x000000000EE34000-memory.dmp

Filesize
5.6MB

Download
memory/3160-159-0x000000000E240000-0x000000000E2DC000-memory.dmp

Filesize
624KB

Download
memory/3160-158-0x0000000005830000-0x0000000005840000-memory.dmp

Filesize
64KB

Download
memory/3160-157-0x0000000000C50000-0x0000000000C8E000-memory.dmp

Filesize
248KB

Download