xpertrat | c830683f700f311fe3d533d849cf045b1cbed5ff76debaa6c3dd8f71c0daa535

Resubmissions

30-09-2021 08:52

210930-ks4xqahbdl 10

30-09-2021 08:44

210930-km65wshac3 10

Analysis

max time kernel
152s
max time network
154s
platform
windows10_x64
resource
win10v20210408
submitted
30-09-2021 08:52

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General

Target

EXCEL.exe
Size

503KB
MD5

cb12b24b0f69225693168e9c35761a1b
SHA1

0f68f676d76e3546d7d625cdb14f0947c59beff5
SHA256

c830683f700f311fe3d533d849cf045b1cbed5ff76debaa6c3dd8f71c0daa535
SHA512

9d53b958b83d8599d0eb1ee4766f03a735cd557290921ded296513e34fd2886ff78382e9a1616613c566d0be9cd5c381fa4de6b86a921d0a33aac1c499d00c65

Score

10^/10

xpertrat test evasion persistence rat trojan

Malware Config

Extracted

Family

xpertrat

Version

3.0.10

Botnet

Test

kapasky-antivirus.firewall-gateway.net:4000

Mutex

L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0

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

Processes:

resource	yara_rule
behavioral2/memory/3340-711-0x0000000000400000-0x0000000000443000-memory.dmp	xpertrat
behavioral2/memory/3340-712-0x0000000000401364-mapping.dmp	xpertrat

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

iexplore.exe

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\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0 = "C:\\Users\\Admin\\AppData\\Roaming\\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0.exe"	iexplore.exe

Deletes itself 1 IoCs

Processes:

notepad.exe

pid process

672 notepad.exe
Windows security modification 2 TTPs 1 IoCs
evasion trojan

Disabling Security Tools
T1089

Modify Registry
T1112

Processes:

EXCEL.exe

description ioc process

Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UACDisableNotify = "0" EXCEL.exe

pid	process
672	notepad.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UACDisableNotify = "0"	EXCEL.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

iexplore.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0 = "C:\\Users\\Admin\\AppData\\Roaming\\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0.exe"	iexplore.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	iexplore.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0 = "C:\\Users\\Admin\\AppData\\Roaming\\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0.exe"	iexplore.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

EXCEL.exe

description ioc process

Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" EXCEL.exe

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

Suspicious use of SetThreadContext 2 IoCs

Processes:

EXCEL.exeEXCEL.exe

description	pid	process	target process
PID 532 set thread context of 3756	532	EXCEL.exe	EXCEL.exe
PID 3756 set thread context of 3340	3756	EXCEL.exe	iexplore.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 12 IoCs

Processes:

powershell.exepowershell.exeEXCEL.exeEXCEL.exe

pid	process
3956	powershell.exe
3956	powershell.exe
3956	powershell.exe
1496	powershell.exe
1496	powershell.exe
1496	powershell.exe
532	EXCEL.exe
532	EXCEL.exe
3756	EXCEL.exe
3756	EXCEL.exe
3756	EXCEL.exe
3756	EXCEL.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

EXCEL.exepowershell.exe

description	pid	process
Token: SeDebugPrivilege	532	EXCEL.exe
Token: SeDebugPrivilege	3956	powershell.exe
Token: SeIncreaseQuotaPrivilege	3956	powershell.exe
Token: SeSecurityPrivilege	3956	powershell.exe
Token: SeTakeOwnershipPrivilege	3956	powershell.exe
Token: SeLoadDriverPrivilege	3956	powershell.exe
Token: SeSystemProfilePrivilege	3956	powershell.exe
Token: SeSystemtimePrivilege	3956	powershell.exe
Token: SeProfSingleProcessPrivilege	3956	powershell.exe
Token: SeIncBasePriorityPrivilege	3956	powershell.exe
Token: SeCreatePagefilePrivilege	3956	powershell.exe
Token: SeBackupPrivilege	3956	powershell.exe
Token: SeRestorePrivilege	3956	powershell.exe
Token: SeShutdownPrivilege	3956	powershell.exe
Token: SeDebugPrivilege	3956	powershell.exe
Token: SeSystemEnvironmentPrivilege	3956	powershell.exe
Token: SeRemoteShutdownPrivilege	3956	powershell.exe
Token: SeUndockPrivilege	3956	powershell.exe
Token: SeManageVolumePrivilege	3956	powershell.exe
Token: 33	3956	powershell.exe
Token: 34	3956	powershell.exe
Token: 35	3956	powershell.exe
Token: 36	3956	powershell.exe
Token: SeIncreaseQuotaPrivilege	3956	powershell.exe
Token: SeSecurityPrivilege	3956	powershell.exe
Token: SeTakeOwnershipPrivilege	3956	powershell.exe
Token: SeLoadDriverPrivilege	3956	powershell.exe
Token: SeSystemProfilePrivilege	3956	powershell.exe
Token: SeSystemtimePrivilege	3956	powershell.exe
Token: SeProfSingleProcessPrivilege	3956	powershell.exe
Token: SeIncBasePriorityPrivilege	3956	powershell.exe
Token: SeCreatePagefilePrivilege	3956	powershell.exe
Token: SeBackupPrivilege	3956	powershell.exe
Token: SeRestorePrivilege	3956	powershell.exe
Token: SeShutdownPrivilege	3956	powershell.exe
Token: SeDebugPrivilege	3956	powershell.exe
Token: SeSystemEnvironmentPrivilege	3956	powershell.exe
Token: SeRemoteShutdownPrivilege	3956	powershell.exe
Token: SeUndockPrivilege	3956	powershell.exe
Token: SeManageVolumePrivilege	3956	powershell.exe
Token: 33	3956	powershell.exe
Token: 34	3956	powershell.exe
Token: 35	3956	powershell.exe
Token: 36	3956	powershell.exe
Token: SeIncreaseQuotaPrivilege	3956	powershell.exe
Token: SeSecurityPrivilege	3956	powershell.exe
Token: SeTakeOwnershipPrivilege	3956	powershell.exe
Token: SeLoadDriverPrivilege	3956	powershell.exe
Token: SeSystemProfilePrivilege	3956	powershell.exe
Token: SeSystemtimePrivilege	3956	powershell.exe
Token: SeProfSingleProcessPrivilege	3956	powershell.exe
Token: SeIncBasePriorityPrivilege	3956	powershell.exe
Token: SeCreatePagefilePrivilege	3956	powershell.exe
Token: SeBackupPrivilege	3956	powershell.exe
Token: SeRestorePrivilege	3956	powershell.exe
Token: SeShutdownPrivilege	3956	powershell.exe
Token: SeDebugPrivilege	3956	powershell.exe
Token: SeSystemEnvironmentPrivilege	3956	powershell.exe
Token: SeRemoteShutdownPrivilege	3956	powershell.exe
Token: SeUndockPrivilege	3956	powershell.exe
Token: SeManageVolumePrivilege	3956	powershell.exe
Token: 33	3956	powershell.exe
Token: 34	3956	powershell.exe
Token: 35	3956	powershell.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

EXCEL.exeiexplore.exe

pid process

3756 EXCEL.exe
3340 iexplore.exe

pid	process
3756	EXCEL.exe
3340	iexplore.exe

Suspicious use of WriteProcessMemory 25 IoCs

Processes:

EXCEL.exeEXCEL.exeiexplore.exe

description	pid	process	target process
PID 532 wrote to memory of 3956	532	EXCEL.exe	powershell.exe
PID 532 wrote to memory of 3956	532	EXCEL.exe	powershell.exe
PID 532 wrote to memory of 3956	532	EXCEL.exe	powershell.exe
PID 532 wrote to memory of 1496	532	EXCEL.exe	powershell.exe
PID 532 wrote to memory of 1496	532	EXCEL.exe	powershell.exe
PID 532 wrote to memory of 1496	532	EXCEL.exe	powershell.exe
PID 532 wrote to memory of 3756	532	EXCEL.exe	EXCEL.exe
PID 532 wrote to memory of 3756	532	EXCEL.exe	EXCEL.exe
PID 532 wrote to memory of 3756	532	EXCEL.exe	EXCEL.exe
PID 532 wrote to memory of 3756	532	EXCEL.exe	EXCEL.exe
PID 532 wrote to memory of 3756	532	EXCEL.exe	EXCEL.exe
PID 532 wrote to memory of 3756	532	EXCEL.exe	EXCEL.exe
PID 532 wrote to memory of 3756	532	EXCEL.exe	EXCEL.exe
PID 3756 wrote to memory of 3340	3756	EXCEL.exe	iexplore.exe
PID 3756 wrote to memory of 3340	3756	EXCEL.exe	iexplore.exe
PID 3756 wrote to memory of 3340	3756	EXCEL.exe	iexplore.exe
PID 3756 wrote to memory of 3340	3756	EXCEL.exe	iexplore.exe
PID 3756 wrote to memory of 3340	3756	EXCEL.exe	iexplore.exe
PID 3756 wrote to memory of 3340	3756	EXCEL.exe	iexplore.exe
PID 3756 wrote to memory of 3340	3756	EXCEL.exe	iexplore.exe
PID 3756 wrote to memory of 3340	3756	EXCEL.exe	iexplore.exe
PID 3340 wrote to memory of 672	3340	iexplore.exe	notepad.exe
PID 3340 wrote to memory of 672	3340	iexplore.exe	notepad.exe
PID 3340 wrote to memory of 672	3340	iexplore.exe	notepad.exe
PID 3340 wrote to memory of 672	3340	iexplore.exe	notepad.exe

System policy modification 1 TTPs 1 IoCs
evasion

Modify Registry
T1112

Processes:

EXCEL.exe

description ioc process

Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" EXCEL.exe

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

C:\Users\Admin\AppData\Local\Temp\EXCEL.exe
"C:\Users\Admin\AppData\Local\Temp\EXCEL.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:532
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Test-NetConnection -TraceRoute twitch.com
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3956
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Start-Sleep -s 5
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:1496
- C:\Users\Admin\AppData\Local\Temp\EXCEL.exe
  C:\Users\Admin\AppData\Local\Temp\EXCEL.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:3756
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    C:\Users\Admin\AppData\Local\Temp\EXCEL.exe
    3⤵
    - Adds policy Run key to start application
    - Adds Run key to start application
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3340
  - - C:\Windows\SysWOW64\notepad.exe
      notepad.exe
      4⤵
      Deletes itself
      PID:672

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

MD5
1712dab0a1bf4e9e3ff666b9c431550d

SHA1
34d1dec8fa95f62c72cb3f92a22c13ad9eece10f

SHA256
7184a35390c8d6549ef4ddf2909c8fc3446572229bb1788fe178332d80ebfa97

SHA512
6ae29c37c11c851ed337afee3c3ad654593063e76df88a6974933e449ac8d86bfa005b9bf2e0ee29aad4647b8f8f32ac753587077fd745424be7f9765688e7b7

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\ModuleAnalysisCache

MD5
1c33ff599b382b705675229c91fc2f99

SHA1
c20086746c14c5d57be9a3df47bd75fa77abe7e0

SHA256
d46b6790776328125154bb8231deafcc7786911bea48fbcd2742c05fa1c4da0a

SHA512
5b975f6b0d5407d8d43975c0fd0c26ecb155f6ee9b7416e39478f84e97deea590d1eb0cf2a972adcf96eba6745fdef472f6fcf51d85cd53c2da9b4c550ee413c

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5
a7506cea827185b95f9226a4fccd5995

SHA1
3809a3faf71e262625f13356f00ad4c698ffc356

SHA256
2a37c39a0af22d9d6d9eab1d94ff747d30664a9a65b8c5e3b30ff34ad898aca1

SHA512
f8b1ff013154068ba9f6816a7d215b01eb78adc29e71021a1566309d4b9c8c874bcc0643c224332173d7e7a8d902d000feb894ac8dab79b0499cb9a8d295662f

Download Submit
memory/532-702-0x0000000002C70000-0x0000000002CA0000-memory.dmp

Filesize
192KB

Download
memory/532-116-0x0000000005380000-0x0000000005381000-memory.dmp

Filesize
4KB

Download
memory/532-701-0x00000000011A0000-0x00000000011EF000-memory.dmp

Filesize
316KB

Download
memory/532-114-0x00000000008F0000-0x00000000008F1000-memory.dmp

Filesize
4KB

Download
memory/672-719-0x0000000000000000-mapping.dmp

Download
memory/1496-686-0x00000000072B2000-0x00000000072B3000-memory.dmp

Filesize
4KB

Download
memory/1496-677-0x0000000000000000-mapping.dmp

Download
memory/1496-685-0x00000000072B0000-0x00000000072B1000-memory.dmp

Filesize
4KB

Download
memory/1496-709-0x00000000072B3000-0x00000000072B4000-memory.dmp

Filesize
4KB

Download
memory/3340-712-0x0000000000401364-mapping.dmp

Download
memory/3340-711-0x0000000000400000-0x0000000000443000-memory.dmp

Filesize
268KB

Download
memory/3340-715-0x0000000002D70000-0x0000000002EC3000-memory.dmp

Filesize
1.3MB

Download
memory/3340-716-0x0000000002D71000-0x0000000002E6D000-memory.dmp

Filesize
1008KB

Download
memory/3756-703-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/3756-704-0x00000000004010B8-mapping.dmp

Download
memory/3756-705-0x00000000015A0000-0x00000000016F3000-memory.dmp

Filesize
1.3MB

Download
memory/3756-706-0x00000000015A1000-0x000000000169D000-memory.dmp

Filesize
1008KB

Download
memory/3756-710-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/3956-128-0x00000000073B0000-0x00000000073B1000-memory.dmp

Filesize
4KB

Download
memory/3956-138-0x0000000008BE0000-0x0000000008C13000-memory.dmp

Filesize
204KB

Download
memory/3956-469-0x00000000026D0000-0x00000000026D1000-memory.dmp

Filesize
4KB

Download
memory/3956-552-0x0000000002700000-0x0000000002701000-memory.dmp

Filesize
4KB

Download
memory/3956-570-0x0000000000310000-0x0000000000311000-memory.dmp

Filesize
4KB

Download
memory/3956-571-0x00000000064E6000-0x00000000064E8000-memory.dmp

Filesize
8KB

Download
memory/3956-382-0x000000000A050000-0x000000000A051000-memory.dmp

Filesize
4KB

Download
memory/3956-381-0x000000000A6D0000-0x000000000A6D1000-memory.dmp

Filesize
4KB

Download
memory/3956-153-0x0000000008EF0000-0x0000000008EF1000-memory.dmp

Filesize
4KB

Download
memory/3956-151-0x000000007EF70000-0x000000007EF71000-memory.dmp

Filesize
4KB

Download
memory/3956-152-0x00000000064E3000-0x00000000064E4000-memory.dmp

Filesize
4KB

Download
memory/3956-150-0x0000000008D30000-0x0000000008D31000-memory.dmp

Filesize
4KB

Download
memory/3956-145-0x0000000008BC0000-0x0000000008BC1000-memory.dmp

Filesize
4KB

Download
memory/3956-393-0x0000000000170000-0x0000000000171000-memory.dmp

Filesize
4KB

Download
memory/3956-130-0x0000000007C60000-0x0000000007C61000-memory.dmp

Filesize
4KB

Download
memory/3956-129-0x0000000007CE0000-0x0000000007CE1000-memory.dmp

Filesize
4KB

Download
memory/3956-127-0x0000000007540000-0x0000000007541000-memory.dmp

Filesize
4KB

Download
memory/3956-126-0x00000000074D0000-0x00000000074D1000-memory.dmp

Filesize
4KB

Download
memory/3956-125-0x0000000007280000-0x0000000007281000-memory.dmp

Filesize
4KB

Download
memory/3956-124-0x0000000006A90000-0x0000000006A91000-memory.dmp

Filesize
4KB

Download
memory/3956-123-0x00000000064E2000-0x00000000064E3000-memory.dmp

Filesize
4KB

Download
memory/3956-122-0x0000000006B60000-0x0000000006B61000-memory.dmp

Filesize
4KB

Download
memory/3956-121-0x00000000064E0000-0x00000000064E1000-memory.dmp

Filesize
4KB

Download
memory/3956-120-0x00000000064F0000-0x00000000064F1000-memory.dmp

Filesize
4KB

Download
memory/3956-117-0x0000000000000000-mapping.dmp

Download