xworm | 7761d76284feb79783d96c62b2088d14b39d9f5b485b429f2c0f69d081201629

Analysis

max time kernel
139s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
13/06/2024, 01:23

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General

Target
7761d76284feb79783d96c62b2088d14b39d9f5b485b429f2c0f69d081201629.exe
Size 254KB
Sample240613-br2ljayfra
SHA256 7761d76284feb79783d96c62b2088d14b39d9f5b485b429f2c0f69d081201629
MD5 a71aaa9e10f9dc8701c208df3832a3b8
SHA1 8602839b452d344aa3004c37fc1356d0aff131ff
SHA512 41df210c40ef62c4479aa2695fa98573f9515035314866738d14f45e2afbcd19e87ab9fae2985f092bfa300d6195c63bbdd62b527fe6457a3912cc236c0ed7f7
SSDEEP 6144:HAlG9hpBZvPIqkwawp2H24qBszT98CUgR8/PTSk+c8:gChpBZvPItGK2L2hSDD
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution rat trojan

Malware Config

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x0007000000023278-5.dat	family_xworm
behavioral2/memory/1436-7-0x0000000000830000-0x0000000000848000-memory.dmp	family_xworm

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

Detects Windows executables referencing non-Windows User-Agents 2 IoCs

resource	yara_rule
behavioral2/files/0x0007000000023278-5.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/1436-7-0x0000000000830000-0x0000000000848000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

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

execution

PowerShell

T1059.001

pid	Process
1008	powershell.exe
3392	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-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	svchost‌.exe

Executes dropped EXE 1 IoCs

pid	Process
1436	svchost‌.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\System32\svchost‌.exe	7761d76284feb79783d96c62b2088d14b39d9f5b485b429f2c0f69d081201629.exe
File opened for modification	C:\Windows\System32\svchost‌.exe	7761d76284feb79783d96c62b2088d14b39d9f5b485b429f2c0f69d081201629.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1008	powershell.exe
1008	powershell.exe
3392	powershell.exe
3392	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1436	svchost‌.exe
Token: SeDebugPrivilege	1008	powershell.exe
Token: SeDebugPrivilege	3392	powershell.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2312 wrote to memory of 5080	2312	7761d76284feb79783d96c62b2088d14b39d9f5b485b429f2c0f69d081201629.exe	83
PID 2312 wrote to memory of 5080	2312	7761d76284feb79783d96c62b2088d14b39d9f5b485b429f2c0f69d081201629.exe	83
PID 1436 wrote to memory of 1008	1436	svchost‌.exe	88
PID 1436 wrote to memory of 1008	1436	svchost‌.exe	88
PID 1436 wrote to memory of 3392	1436	svchost‌.exe	90
PID 1436 wrote to memory of 3392	1436	svchost‌.exe	90

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\7761d76284feb79783d96c62b2088d14b39d9f5b485b429f2c0f69d081201629.exe
"C:\Users\Admin\AppData\Local\Temp\7761d76284feb79783d96c62b2088d14b39d9f5b485b429f2c0f69d081201629.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:2312
- C:\Windows\SYSTEM32\schtasks.exe
  schtasks /run /TN Update
  2⤵
  PID:5080

C:\Windows\System32\svchost‌.exe
C:\Windows\System32\svchost‌.exe
1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1436
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Windows\System32\svchost‌.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1008
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost‌.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3392

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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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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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d
MD5 6d3e9c29fe44e90aae6ed30ccf799ca8
SHA1 c7974ef72264bbdf13a2793ccf1aed11bc565dce
SHA512 60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a
MD5 SHA1 SHA512

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__PSScriptPolicyTest_4sazhm5k.4ue.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_4sazhm5k.4ue.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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svchost‌.exe

Path C:\Windows\System32\svchost‌.exe
Size 71KB
SHA256 96595ae66b99cd392d0aa69da8ed7ad69affcdf0731e785bcc474c33b5094773
MD5 3104737e86d59919380e95c5d85a624d
SHA1 a0190f12732a7b95d84d5b3da3257815b8e6af46
SHA512 c79243de42003879557c0f281588573df8887fcaef747b0fc2bda056c1650c0c9a30400a3c037e767a53dc5ae1de715b39256547bf9005fd75fef6f11bc0eca9
SSDEEP 1536:QW6xgOqjT1keBls05vT+s+b3w20UJ+26KAMbOM6cNEBK0n:Q5xG1FlswvSs+b3wJobOMjNO9
MD5 SHA1 SHA512 SSDEEP

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memory/1008-14-0x000002005C360000-0x000002005C382000-memory.dmp

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memory/1436-7-0x0000000000830000-0x0000000000848000-memory.dmp

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memory/1436-8-0x00007FFEF97C0000-0x00007FFEFA281000-memory.dmp

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memory/1436-33-0x00007FFEF97C0000-0x00007FFEFA281000-memory.dmp

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memory/1436-34-0x00007FFEF97C0000-0x00007FFEFA281000-memory.dmp

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memory/2312-0-0x00007FFEF97C3000-0x00007FFEF97C5000-memory.dmp

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memory/2312-1-0x0000000000030000-0x0000000000076000-memory.dmp

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