xpertrat | 29a4c9380a91012be5a2b3659f9a4c46d0eca15c689a95707f78ccde9cd11f02

Analysis

max time kernel
148s
max time network
147s
platform
windows7_x64
resource
win7v20210410
submitted
25/04/2021, 08:01

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General

Target
1f609ed72b74f23379e8d7636b5faa13.exe
Size 25KB
Sample210425-fezemprbws
SHA256 29a4c9380a91012be5a2b3659f9a4c46d0eca15c689a95707f78ccde9cd11f02
MD5 1f609ed72b74f23379e8d7636b5faa13
SHA1 439d50691f585b1a3cd674a0852834a97d9fc9cb
SHA512 15eb37df42c5747aad644844b7ed3a7da98855e443e5293a64ebf092025e9210e99dbc7889c92854bcbfbf1840004a6c0b2c086a20d6a968f22354f0cd1161b4
MD5 SHA1 SHA512

Score

10^/10

xpertrat special x evasion persistence rat trojan

Malware Config

Extracted

Family

xpertrat

Version

3.0.10

Botnet

special X

ghytrty.duckdns.org:4145
spapertyy.duckdns.org:4145

Mutex

L3Q7I4T2-J8A6-K6O4-W4G3-T5J7D0W2V5E0

Signatures

UAC bypass 3 TTPs
evasion trojan

Bypass User Account Control
T1088

Disabling Security Tools
T1089

Modify Registry
T1112
Windows security bypass 2 TTPs
evasion trojan

Disabling Security Tools
T1089

Modify Registry
T1112
XpertRAT
XpertRAT is a remote access trojan with various capabilities.
rat xpertrat

XpertRAT Core Payload 2 IoCs

resource	yara_rule
behavioral1/memory/304-71-0x0000000000400000-0x0000000000443000-memory.dmp	xpertrat
behavioral1/memory/304-72-0x0000000000401364-mapping.dmp	xpertrat

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run	iexplore.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\L3Q7I4T2-J8A6-K6O4-W4G3-T5J7D0W2V5E0 = "C:\\Users\\Admin\\AppData\\Roaming\\L3Q7I4T2-J8A6-K6O4-W4G3-T5J7D0W2V5E0\\L3Q7I4T2-J8A6-K6O4-W4G3-T5J7D0W2V5E0.exe"	iexplore.exe

Windows security modification 2 TTPs 1 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UACDisableNotify = "0"	1f609ed72b74f23379e8d7636b5faa13.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run	iexplore.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\L3Q7I4T2-J8A6-K6O4-W4G3-T5J7D0W2V5E0 = "C:\\Users\\Admin\\AppData\\Roaming\\L3Q7I4T2-J8A6-K6O4-W4G3-T5J7D0W2V5E0\\L3Q7I4T2-J8A6-K6O4-W4G3-T5J7D0W2V5E0.exe"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Windows\CurrentVersion\Run\L3Q7I4T2-J8A6-K6O4-W4G3-T5J7D0W2V5E0 = "C:\\Users\\Admin\\AppData\\Roaming\\L3Q7I4T2-J8A6-K6O4-W4G3-T5J7D0W2V5E0\\L3Q7I4T2-J8A6-K6O4-W4G3-T5J7D0W2V5E0.exe"	iexplore.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	1f609ed72b74f23379e8d7636b5faa13.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 12 IoCs

pid	Process
1688	1f609ed72b74f23379e8d7636b5faa13.exe
1688	1f609ed72b74f23379e8d7636b5faa13.exe
1688	1f609ed72b74f23379e8d7636b5faa13.exe
1688	1f609ed72b74f23379e8d7636b5faa13.exe
1688	1f609ed72b74f23379e8d7636b5faa13.exe
1688	1f609ed72b74f23379e8d7636b5faa13.exe
1688	1f609ed72b74f23379e8d7636b5faa13.exe
1688	1f609ed72b74f23379e8d7636b5faa13.exe
1688	1f609ed72b74f23379e8d7636b5faa13.exe
1688	1f609ed72b74f23379e8d7636b5faa13.exe
1688	1f609ed72b74f23379e8d7636b5faa13.exe
1688	1f609ed72b74f23379e8d7636b5faa13.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1688 set thread context of 1520	1688	1f609ed72b74f23379e8d7636b5faa13.exe	32
PID 1520 set thread context of 304	1520	1f609ed72b74f23379e8d7636b5faa13.exe	34

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
368	1688	WerFault.exe	24

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1624	timeout.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
1688	1f609ed72b74f23379e8d7636b5faa13.exe
1688	1f609ed72b74f23379e8d7636b5faa13.exe
1688	1f609ed72b74f23379e8d7636b5faa13.exe
1520	1f609ed72b74f23379e8d7636b5faa13.exe
1520	1f609ed72b74f23379e8d7636b5faa13.exe
368	WerFault.exe
368	WerFault.exe
368	WerFault.exe
368	WerFault.exe
368	WerFault.exe
1520	1f609ed72b74f23379e8d7636b5faa13.exe
1520	1f609ed72b74f23379e8d7636b5faa13.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
368	WerFault.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1688	1f609ed72b74f23379e8d7636b5faa13.exe
Token: SeDebugPrivilege	368	WerFault.exe
Token: SeDebugPrivilege	304	iexplore.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1520	1f609ed72b74f23379e8d7636b5faa13.exe
304	iexplore.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 1688 wrote to memory of 1296	1688	1f609ed72b74f23379e8d7636b5faa13.exe	29
PID 1688 wrote to memory of 1296	1688	1f609ed72b74f23379e8d7636b5faa13.exe	29
PID 1688 wrote to memory of 1296	1688	1f609ed72b74f23379e8d7636b5faa13.exe	29
PID 1688 wrote to memory of 1296	1688	1f609ed72b74f23379e8d7636b5faa13.exe	29
PID 1296 wrote to memory of 1624	1296	cmd.exe	31
PID 1296 wrote to memory of 1624	1296	cmd.exe	31
PID 1296 wrote to memory of 1624	1296	cmd.exe	31
PID 1296 wrote to memory of 1624	1296	cmd.exe	31
PID 1688 wrote to memory of 1520	1688	1f609ed72b74f23379e8d7636b5faa13.exe	32
PID 1688 wrote to memory of 1520	1688	1f609ed72b74f23379e8d7636b5faa13.exe	32
PID 1688 wrote to memory of 1520	1688	1f609ed72b74f23379e8d7636b5faa13.exe	32
PID 1688 wrote to memory of 1520	1688	1f609ed72b74f23379e8d7636b5faa13.exe	32
PID 1688 wrote to memory of 1520	1688	1f609ed72b74f23379e8d7636b5faa13.exe	32
PID 1688 wrote to memory of 1520	1688	1f609ed72b74f23379e8d7636b5faa13.exe	32
PID 1688 wrote to memory of 1520	1688	1f609ed72b74f23379e8d7636b5faa13.exe	32
PID 1688 wrote to memory of 1520	1688	1f609ed72b74f23379e8d7636b5faa13.exe	32
PID 1688 wrote to memory of 368	1688	1f609ed72b74f23379e8d7636b5faa13.exe	33
PID 1688 wrote to memory of 368	1688	1f609ed72b74f23379e8d7636b5faa13.exe	33
PID 1688 wrote to memory of 368	1688	1f609ed72b74f23379e8d7636b5faa13.exe	33
PID 1688 wrote to memory of 368	1688	1f609ed72b74f23379e8d7636b5faa13.exe	33
PID 1520 wrote to memory of 304	1520	1f609ed72b74f23379e8d7636b5faa13.exe	34
PID 1520 wrote to memory of 304	1520	1f609ed72b74f23379e8d7636b5faa13.exe	34
PID 1520 wrote to memory of 304	1520	1f609ed72b74f23379e8d7636b5faa13.exe	34
PID 1520 wrote to memory of 304	1520	1f609ed72b74f23379e8d7636b5faa13.exe	34
PID 1520 wrote to memory of 304	1520	1f609ed72b74f23379e8d7636b5faa13.exe	34
PID 1520 wrote to memory of 304	1520	1f609ed72b74f23379e8d7636b5faa13.exe	34
PID 1520 wrote to memory of 304	1520	1f609ed72b74f23379e8d7636b5faa13.exe	34
PID 1520 wrote to memory of 304	1520	1f609ed72b74f23379e8d7636b5faa13.exe	34
PID 1520 wrote to memory of 304	1520	1f609ed72b74f23379e8d7636b5faa13.exe	34

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	1f609ed72b74f23379e8d7636b5faa13.exe

C:\Users\Admin\AppData\Local\Temp\1f609ed72b74f23379e8d7636b5faa13.exe
"C:\Users\Admin\AppData\Local\Temp\1f609ed72b74f23379e8d7636b5faa13.exe"
1⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1688
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout 1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1296
- - C:\Windows\SysWOW64\timeout.exe
    timeout 1
    3⤵
    - Delays execution with timeout.exe
    PID:1624
- C:\Users\Admin\AppData\Local\Temp\1f609ed72b74f23379e8d7636b5faa13.exe
  "C:\Users\Admin\AppData\Local\Temp\1f609ed72b74f23379e8d7636b5faa13.exe"
  2⤵
  - Windows security modification
  - Checks whether UAC is enabled
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  - System policy modification
  PID:1520
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    C:\Users\Admin\AppData\Local\Temp\1f609ed72b74f23379e8d7636b5faa13.exe
    3⤵
    - Adds policy Run key to start application
    - Adds Run key to start application
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:304
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1688 -s 1276
  2⤵
  - Program crash
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  PID:368

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Bypass User Account Control

T1088

Defense Evasion

Bypass User Account Control

T1088

Disabling Security Tools

T1089

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/304-78-0x0000000075011000-0x0000000075013000-memory.dmp

Download

memory/304-73-0x0000000000600000-0x0000000000753000-memory.dmp

Download

memory/304-71-0x0000000000400000-0x0000000000443000-memory.dmp

Download

memory/368-75-0x0000000000310000-0x0000000000311000-memory.dmp

Download

memory/1520-66-0x0000000000400000-0x000000000042C000-memory.dmp

Download

memory/1688-60-0x0000000000080000-0x0000000000081000-memory.dmp

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memory/1688-63-0x0000000000730000-0x0000000000769000-memory.dmp

Download

memory/1688-62-0x0000000004A00000-0x0000000004A01000-memory.dmp

Download