asyncrat | cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe

General

Target
cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
Size 45KB
Sample260731-vzbvmaxcld
SHA256 cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe
MD5 2bc680a192c11f815569848467cbd764
SHA1 ec85ed2231d6881cbb0b94bc981db07df2143b90
SHA512 fecd9081495f9b32aabd9d5738d82880fbf12af77d2aed3779731ba18bb1bc65a8e3c23bd83a7fc199d61cce9bde112066d6e8357e753b19c4b4d23d5f4609ea
SSDEEP 768:5udApTNctooWUS7C+mo2qtO6R8aI6OPIXzjbBgI3iQamitzFk2MDvBDZ0x:5udApTNmU2h+Fb3X3buISQamOzF3MFd2
TLSH
T111233C0037E8812BF2BE4F789DF26245867AF6673603D58A1CC442DB5613FC69A426FD
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

xemsexxx.me:80
xemsexxx.me:22
xemsexxx.me:8080
xemsexxx.me:8880
xemsexxx.me:2052
xemsexxx.me:2082
xemsexxx.me:2086
xemsexxx.me:2095
xemsexxx.me:443
xemsexxx.me:2053
xemsexxx.me:2083
xemsexxx.me:2087
xemsexxx.me:2096
xemsexxx.me:8443
www.xemsexxx.me:80
www.xemsexxx.me:22
www.xemsexxx.me:8080
www.xemsexxx.me:8880
www.xemsexxx.me:2052
www.xemsexxx.me:2082
www.xemsexxx.me:2086
www.xemsexxx.me:2095
www.xemsexxx.me:443
www.xemsexxx.me:2053
www.xemsexxx.me:2083
www.xemsexxx.me:2087
www.xemsexxx.me:2096
www.xemsexxx.me:8443
sobig.xemsexxx.me:80
sobig.xemsexxx.me:22
sobig.xemsexxx.me:8080
sobig.xemsexxx.me:8880
sobig.xemsexxx.me:2052
sobig.xemsexxx.me:2082
sobig.xemsexxx.me:2086
sobig.xemsexxx.me:2095
sobig.xemsexxx.me:443
sobig.xemsexxx.me:2053
sobig.xemsexxx.me:2083
sobig.xemsexxx.me:2087
sobig.xemsexxx.me:2096
sobig.xemsexxx.me:8443
malware.xemsexxx.me:80
malware.xemsexxx.me:22
malware.xemsexxx.me:8080
malware.xemsexxx.me:8880
malware.xemsexxx.me:2052
malware.xemsexxx.me:2082
malware.xemsexxx.me:2086
malware.xemsexxx.me:2095
malware.xemsexxx.me:443
malware.xemsexxx.me:2053
malware.xemsexxx.me:2083
malware.xemsexxx.me:2087
malware.xemsexxx.me:2096
malware.xemsexxx.me:8443

Mutex

gWQPKj9uBZ8t

Attributes

delay
0
install
true
install_file
kkqn4j.exe
install_folder
%AppData%

aes.plain

Signatures

Family: 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/files/0x000e00000001c581-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
3352	kkqn4j.exe
4456	kkqn4j.exe

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

System Information Discovery
T1082

Executes a command shell one-liner 1 TTPs 2 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
3284	cmd.exe
4668	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	kkqn4j.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	kkqn4j.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4164	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
3484	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
Token: SeDebugPrivilege	3352	kkqn4j.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3184 wrote to memory of 3284	3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe	89
PID 3184 wrote to memory of 4668	3184	cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe	91
PID 3284 wrote to memory of 3484	3284	cmd.exe	93
PID 4668 wrote to memory of 4164	4668	cmd.exe	94
PID 4668 wrote to memory of 4456	4668	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe
"C:\Users\Admin\AppData\Local\Temp\cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3184
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "kkqn4j" /tr '"C:\Users\Admin\AppData\Roaming\kkqn4j.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3284
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "kkqn4j" /tr '"C:\Users\Admin\AppData\Roaming\kkqn4j.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3484
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp2E4A.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4668
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4164
- - C:\Users\Admin\AppData\Roaming\kkqn4j.exe
    "C:\Users\Admin\AppData\Roaming\kkqn4j.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4456

C:\Users\Admin\AppData\Roaming\kkqn4j.exe
"C:\Users\Admin\AppData\Roaming\kkqn4j.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:3352

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tmp2E4A.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp2E4A.tmp.bat
Size 150B
SHA256 5d7046da17db4dbd8205f96f0c69099f3937dcabd05a249055dc98c3261bd86c
MD5 aa7ef12db2c681e5bb1497bbe264f4c3
SHA1 f610ca327b98556279074837b17bc8ff0ea444c4
SHA512 6eb9bdc5d7b1511d44bbca1802acc78edbe5b5bfae9a1da03fbd7227351dfb648107dd1dc50fb5aaabcf4dd9bb3d7494f55b2db5fa4c69975df223eb9df71821
TLSH
T1A2C02B5371C5EE6F2805146303FAE48D91B26E193F44BB10DB04805E3380488F0D9385
MD5 SHA1 SHA512 TLSH

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kkqn4j.exe

Path C:\Users\Admin\AppData\Roaming\kkqn4j.exe
Size 45KB
SHA256 cfd3258c40b1820f9a445786ce889b48937ccb8450e07f9a1c269ca726bd8cfe
MD5 2bc680a192c11f815569848467cbd764
SHA1 ec85ed2231d6881cbb0b94bc981db07df2143b90
SHA512 fecd9081495f9b32aabd9d5738d82880fbf12af77d2aed3779731ba18bb1bc65a8e3c23bd83a7fc199d61cce9bde112066d6e8357e753b19c4b4d23d5f4609ea
SSDEEP 768:5udApTNctooWUS7C+mo2qtO6R8aI6OPIXzjbBgI3iQamitzFk2MDvBDZ0x:5udApTNmU2h+Fb3X3buISQamOzF3MFd2
TLSH
T111233C0037E8812BF2BE4F789DF26245867AF6673603D58A1CC442DB5613FC69A426FD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3184-0-0x0000000074AD2000-0x0000000074AD3000-memory.dmp

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memory/3184-1-0x0000000000300000-0x0000000000312000-memory.dmp

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memory/3184-2-0x0000000074AC0000-0x000000007527C000-memory.dmp

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memory/3184-3-0x0000000004D40000-0x0000000004DDC000-memory.dmp

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memory/3184-8-0x0000000074AC0000-0x000000007527C000-memory.dmp

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memory/3352-12-0x00000000742E2000-0x00000000742E3000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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