asyncrat | 273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e

General

Target
273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e.exe
Size 45KB
Sample260804-pmd7bszgrb
SHA256 273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e
MD5 57e821b864ff732a4351ea9594120275
SHA1 1dc73a4560809d441aadab69b70f5b5d99e82940
SHA512 c9ff7ce8c124fda61765c62ff3661b73ca9ac5b1d55e8d1a7cceee06a05c65e467b741e243d654030a468149a01a4713fc30a81ef39d6d35aeb9da500909cea4
SSDEEP 768:wuDWZTpw7bmaWUg3gSk0mo2qlLlsHoPEaMPI1zjbwgX3iSo7RR/ajBDZMx:wuDWZTpMZSB2OuuEax13b3XSrX/+dMx
TLSH
T185232A003FE9822BF2BE4F789CF26145857AF2777603D58A1CC441975613BC69A42AFE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default command_and_control defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

phimvkl.com:80
phimvkl.com:22
phimvkl.com:8080
phimvkl.com:8880
phimvkl.com:2052
phimvkl.com:2082
phimvkl.com:2086
phimvkl.com:2095
phimvkl.com:443
phimvkl.com:2053
phimvkl.com:2083
phimvkl.com:2087
phimvkl.com:2096
phimvkl.com:8443
www.phimvkl.com:80
www.phimvkl.com:22
www.phimvkl.com:8080
www.phimvkl.com:8880
www.phimvkl.com:2052
www.phimvkl.com:2082
www.phimvkl.com:2086
www.phimvkl.com:2095
www.phimvkl.com:443
www.phimvkl.com:2053
www.phimvkl.com:2083
www.phimvkl.com:2087
www.phimvkl.com:2096
www.phimvkl.com:8443
locky.phimvkl.com:80
locky.phimvkl.com:22
locky.phimvkl.com:8080
locky.phimvkl.com:8880
locky.phimvkl.com:2052
locky.phimvkl.com:2082
locky.phimvkl.com:2086
locky.phimvkl.com:2095
locky.phimvkl.com:443
locky.phimvkl.com:2053
locky.phimvkl.com:2083
locky.phimvkl.com:2087
locky.phimvkl.com:2096
locky.phimvkl.com:8443
sodinokibi.phimvkl.com:80
sodinokibi.phimvkl.com:22
sodinokibi.phimvkl.com:8080
sodinokibi.phimvkl.com:8880
sodinokibi.phimvkl.com:2052
sodinokibi.phimvkl.com:2082
sodinokibi.phimvkl.com:2086
sodinokibi.phimvkl.com:2095
sodinokibi.phimvkl.com:443
sodinokibi.phimvkl.com:2053
sodinokibi.phimvkl.com:2083
sodinokibi.phimvkl.com:2087
sodinokibi.phimvkl.com:2096
sodinokibi.phimvkl.com:8443

Mutex

ZYZvl6VJ9toF

Attributes

delay
0
install
true
install_file
5fahb.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
behavioral1/files/0x000a00000002432c-8.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-1-5-21-540052884-2969440504-464782435-1000\Control Panel\International\Geo\Nation	273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e.exe

Executes dropped EXE 2 IoCs

pid	Process
4716	5fahb.exe
4112	5fahb.exe

Outbound SSH connection to public host 2 TTPs 4 IoCs

SSH is used for remote access. This may indicate SSH host discovery, encrypted C2 traffic, or data exfiltration.

command_and_control

Protocol Tunneling

T1572

Network Service Discovery

T1046

description	flow	ioc	pid	Process
SSH destination	64	104.26.9.243:22	4716	5fahb.exe
SSH destination	37	104.26.9.243:22	4716	5fahb.exe
SSH destination	44	104.26.8.243:22	4716	5fahb.exe
SSH destination	51	172.67.69.53:22	4716	5fahb.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
2432	cmd.exe
1116	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5fahb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5fahb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4916	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
2316	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
1060	273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e.exe
1060	273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e.exe
1060	273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e.exe
1060	273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e.exe
1060	273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e.exe
1060	273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e.exe
1060	273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e.exe
1060	273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e.exe
1060	273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e.exe
1060	273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e.exe
1060	273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e.exe
1060	273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e.exe
1060	273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e.exe
1060	273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e.exe
1060	273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e.exe
1060	273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e.exe
1060	273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e.exe
1060	273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e.exe
1060	273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e.exe
1060	273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e.exe
1060	273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1060	273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e.exe
Token: SeDebugPrivilege	4716	5fahb.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1060 wrote to memory of 2432	1060	273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e.exe	84
PID 1060 wrote to memory of 1116	1060	273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e.exe	86
PID 1116 wrote to memory of 4916	1116	cmd.exe	88
PID 2432 wrote to memory of 2316	2432	cmd.exe	89
PID 1116 wrote to memory of 4112	1116	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e.exe
"C:\Users\Admin\AppData\Local\Temp\273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1060
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "5fahb" /tr '"C:\Users\Admin\AppData\Roaming\5fahb.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2432
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "5fahb" /tr '"C:\Users\Admin\AppData\Roaming\5fahb.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2316
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp32D3.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1116
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4916
- - C:\Users\Admin\AppData\Roaming\5fahb.exe
    "C:\Users\Admin\AppData\Roaming\5fahb.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4112

C:\Users\Admin\AppData\Roaming\5fahb.exe
"C:\Users\Admin\AppData\Roaming\5fahb.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4716

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

Network Service Discovery

Query Registry

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Protocol Tunneling

1

T1572

Exfiltration

Impact

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Downloads

tmp32D3.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp32D3.tmp.bat
Size 149B
SHA256 2e3f9b2296030e57a8ffe0dd69e20573a88eaf0bad810264e4f6ffdf7c60158c
MD5 c564c1a6109b6857e2a5d4478d4c0ae5
SHA1 9bed755b765cd1152b9d35fb0d59f9747622d99d
SHA512 14ec70241278dfc0fc8a6f3031407b6d8f1255dc3e7bf9136bf26a1adf4d552c8317d57ac83236de932644c8500437ec2804803ced2f4d4cfbb3a2ce58b6f279
TLSH
T1F7C02B4261C5EA0E2C07141302FAD49DB1726C193F40FF50D314840D2A8089EF4D9341
MD5 SHA1 SHA512 TLSH

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5fahb.exe

Path C:\Users\Admin\AppData\Roaming\5fahb.exe
Size 45KB
SHA256 273c8d574c3c55ca0ce21a3d3ab93fec60fe3524f2bcf80e6fc7c57fcedb013e
MD5 57e821b864ff732a4351ea9594120275
SHA1 1dc73a4560809d441aadab69b70f5b5d99e82940
SHA512 c9ff7ce8c124fda61765c62ff3661b73ca9ac5b1d55e8d1a7cceee06a05c65e467b741e243d654030a468149a01a4713fc30a81ef39d6d35aeb9da500909cea4
SSDEEP 768:wuDWZTpw7bmaWUg3gSk0mo2qlLlsHoPEaMPI1zjbwgX3iSo7RR/ajBDZMx:wuDWZTpMZSB2OuuEax13b3XSrX/+dMx
TLSH
T185232A003FE9822BF2BE4F789CF26145857AF2777603D58A1CC441975613BC69A42AFE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1060-0-0x0000000000510000-0x0000000000522000-memory.dmp

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memory/1060-1-0x0000000004FF0000-0x0000000005000000-memory.dmp

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memory/1060-2-0x0000000004F10000-0x0000000004FAC000-memory.dmp

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memory/4716-10-0x0000000005630000-0x0000000005640000-memory.dmp

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memory/4716-13-0x0000000005630000-0x0000000005640000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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