xworm | a788a5b401661ff1c3eedd21d679ccaf39a35cb1a5a814773b1e4ded48de890c

Analysis

max time kernel
147s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
21/06/2024, 01:29

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General

Target
a788a5b401661ff1c3eedd21d679ccaf39a35cb1a5a814773b1e4ded48de890c.exe
Size 121KB
Sample240621-bv923svcqa
SHA256 a788a5b401661ff1c3eedd21d679ccaf39a35cb1a5a814773b1e4ded48de890c
MD5 5ad0a139daa10def6783d34a578882eb
SHA1 8cbeb48832356f7cff9b1370ece879d72b8eb156
SHA512 2cbd28e71e57b1fa051231565074afeaaacb6332c831e861be45e98eab1d1f1fc0519ddbace3f2f2f24d9a97d8dd767bcfadd827dfb81e960bcc7b73cb5b3b84
SSDEEP 1536:S0DwewicrbsN/YVRrNRF49IG6iOwjaClJEHIl7pmhaKI:S0DweDN/kr/F49IaOw5Ch0
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

sekoneko.zapto.org:1111

Mutex

epkUNO9aHruE9KEn

Attributes

Install_directory
%AppData%
install_file
win64.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/376-0-0x0000000000060000-0x0000000000084000-memory.dmp	family_xworm
behavioral2/files/0x0009000000022abb-59.dat	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
4272	powershell.exe
5080	powershell.exe
1264	powershell.exe
4760	powershell.exe

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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	a788a5b401661ff1c3eedd21d679ccaf39a35cb1a5a814773b1e4ded48de890c.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\win64.lnk	a788a5b401661ff1c3eedd21d679ccaf39a35cb1a5a814773b1e4ded48de890c.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\win64.lnk	a788a5b401661ff1c3eedd21d679ccaf39a35cb1a5a814773b1e4ded48de890c.exe

Executes dropped EXE 2 IoCs

pid	Process
4908	win64.exe
1192	win64.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\win64 = "C:\\Users\\Admin\\AppData\\Roaming\\win64.exe"	a788a5b401661ff1c3eedd21d679ccaf39a35cb1a5a814773b1e4ded48de890c.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
2	ip-api.com

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

System Information Discovery
T1082

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
736	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4272	powershell.exe
4272	powershell.exe
5080	powershell.exe
5080	powershell.exe
1264	powershell.exe
1264	powershell.exe
4760	powershell.exe
4760	powershell.exe
376	a788a5b401661ff1c3eedd21d679ccaf39a35cb1a5a814773b1e4ded48de890c.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	376	a788a5b401661ff1c3eedd21d679ccaf39a35cb1a5a814773b1e4ded48de890c.exe
Token: SeDebugPrivilege	4272	powershell.exe
Token: SeDebugPrivilege	5080	powershell.exe
Token: SeDebugPrivilege	1264	powershell.exe
Token: SeDebugPrivilege	4760	powershell.exe
Token: SeDebugPrivilege	376	a788a5b401661ff1c3eedd21d679ccaf39a35cb1a5a814773b1e4ded48de890c.exe
Token: SeDebugPrivilege	4908	win64.exe
Token: SeDebugPrivilege	1192	win64.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
376	a788a5b401661ff1c3eedd21d679ccaf39a35cb1a5a814773b1e4ded48de890c.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 376 wrote to memory of 4272	376	a788a5b401661ff1c3eedd21d679ccaf39a35cb1a5a814773b1e4ded48de890c.exe	86
PID 376 wrote to memory of 4272	376	a788a5b401661ff1c3eedd21d679ccaf39a35cb1a5a814773b1e4ded48de890c.exe	86
PID 376 wrote to memory of 5080	376	a788a5b401661ff1c3eedd21d679ccaf39a35cb1a5a814773b1e4ded48de890c.exe	88
PID 376 wrote to memory of 5080	376	a788a5b401661ff1c3eedd21d679ccaf39a35cb1a5a814773b1e4ded48de890c.exe	88
PID 376 wrote to memory of 1264	376	a788a5b401661ff1c3eedd21d679ccaf39a35cb1a5a814773b1e4ded48de890c.exe	90
PID 376 wrote to memory of 1264	376	a788a5b401661ff1c3eedd21d679ccaf39a35cb1a5a814773b1e4ded48de890c.exe	90
PID 376 wrote to memory of 4760	376	a788a5b401661ff1c3eedd21d679ccaf39a35cb1a5a814773b1e4ded48de890c.exe	92
PID 376 wrote to memory of 4760	376	a788a5b401661ff1c3eedd21d679ccaf39a35cb1a5a814773b1e4ded48de890c.exe	92
PID 376 wrote to memory of 736	376	a788a5b401661ff1c3eedd21d679ccaf39a35cb1a5a814773b1e4ded48de890c.exe	94
PID 376 wrote to memory of 736	376	a788a5b401661ff1c3eedd21d679ccaf39a35cb1a5a814773b1e4ded48de890c.exe	94

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\a788a5b401661ff1c3eedd21d679ccaf39a35cb1a5a814773b1e4ded48de890c.exe
"C:\Users\Admin\AppData\Local\Temp\a788a5b401661ff1c3eedd21d679ccaf39a35cb1a5a814773b1e4ded48de890c.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:376
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\a788a5b401661ff1c3eedd21d679ccaf39a35cb1a5a814773b1e4ded48de890c.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4272
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'a788a5b401661ff1c3eedd21d679ccaf39a35cb1a5a814773b1e4ded48de890c.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5080
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\win64.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1264
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'win64.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4760
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "win64" /tr "C:\Users\Admin\AppData\Roaming\win64.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:736

C:\Users\Admin\AppData\Roaming\win64.exe
C:\Users\Admin\AppData\Roaming\win64.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4908

C:\Users\Admin\AppData\Roaming\win64.exe
C:\Users\Admin\AppData\Roaming\win64.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1192

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 2KB
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249
MD5 SHA1 SHA512

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win64.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\win64.exe.log
Size 654B
SHA256 e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced
MD5 2ff39f6c7249774be85fd60a8f9a245e
SHA1 684ff36b31aedc1e587c8496c02722c6698c1c4e
SHA512 1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45
MD5 d28a889fd956d5cb3accfbaf1143eb6f
SHA1 157ba54b365341f8ff06707d996b3635da8446f7
SHA512 0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 9e94e7c9ac6134ee30e79498558aa1a5a1ac79a643666c3f8922eed215dd3a98
MD5 eb1ad317bd25b55b2bbdce8a28a74a94
SHA1 98a3978be4d10d62e7411946474579ee5bdc5ea6
SHA512 d011f266c0240d84470c0f9577cd9e4927309bd19bb38570ca9704ed8e1d159f9bea982a59d3eefef72ce7a10bd81208b82e88ef57c7af587f7437a89769adc0
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 347338241585c510bb1fafae13447879318610ca4d844b0e73089957911d77fe
MD5 4178a021dab6578724f63a6a72b9b13b
SHA1 8e5d61c21edaafe4e2257ebe53f9b37b723838b7
SHA512 0f49991948129415c2a02298072055d4de521e4a8cb9ae887bb2096683668fcb491b99d58fd6e239463a5ac981d756c4b2827cb52c1e1253b9cb114095e140c9
MD5 SHA1 SHA512

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__PSScriptPolicyTest_tmjqyfwy.hcj.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_tmjqyfwy.hcj.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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win64.exe

Path C:\Users\Admin\AppData\Roaming\win64.exe
Size 121KB
SHA256 a788a5b401661ff1c3eedd21d679ccaf39a35cb1a5a814773b1e4ded48de890c
MD5 5ad0a139daa10def6783d34a578882eb
SHA1 8cbeb48832356f7cff9b1370ece879d72b8eb156
SHA512 2cbd28e71e57b1fa051231565074afeaaacb6332c831e861be45e98eab1d1f1fc0519ddbace3f2f2f24d9a97d8dd767bcfadd827dfb81e960bcc7b73cb5b3b84
SSDEEP 1536:S0DwewicrbsN/YVRrNRF49IG6iOwjaClJEHIl7pmhaKI:S0DweDN/kr/F49IaOw5Ch0
MD5 SHA1 SHA512 SSDEEP

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memory/376-0-0x0000000000060000-0x0000000000084000-memory.dmp

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memory/376-2-0x00007FFFEFE50000-0x00007FFFF0911000-memory.dmp

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memory/376-57-0x00007FFFEFE50000-0x00007FFFF0911000-memory.dmp

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memory/376-1-0x00007FFFEFE53000-0x00007FFFEFE55000-memory.dmp

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memory/4272-14-0x00007FFFEFE50000-0x00007FFFF0911000-memory.dmp

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memory/4272-15-0x00007FFFEFE50000-0x00007FFFF0911000-memory.dmp

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memory/4272-18-0x00007FFFEFE50000-0x00007FFFF0911000-memory.dmp

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memory/4272-13-0x00007FFFEFE50000-0x00007FFFF0911000-memory.dmp

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memory/4272-8-0x00000180E28C0000-0x00000180E28E2000-memory.dmp

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