xworm | bb6ebd1e6609ffd3ca442aa965cebdab07071715abef65b46e145ad1f700a2d6

General

Target

GXK5E_fsdjgfsdhnfgsd.bat
Size

65KB
MD5

e6ee7aca370346191e07ae542b95cb8c
SHA1

0a2376a42bd1639cab1909e22ad423a4cefab293
SHA256

bb6ebd1e6609ffd3ca442aa965cebdab07071715abef65b46e145ad1f700a2d6
SHA512

7583d3b036ed7bd23f480772fb6f2f70acca8f01be0b6a2a45eb1d7887d38060c2e49435a1e04db8a3a6f06d5200b794bd604559576b6310618607837614cf4a
SSDEEP

1536:ypDhvQgdHQgXro4uFtnqK00ZVrKt1ag2pN7Gop:yXE4uFkKLkanNSop

Score

10^/10

xworm defense_evasion execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

45.144.212.242:7000

Mutex

GHrcTVoc3c8G04bh

Attributes

Install_directory
%AppData%
install_file
SubDir.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000c000000023c3a-5.dat	family_xworm
behavioral2/memory/932-7-0x00000000005A0000-0x00000000005B2000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
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
452	powershell.exe
4984	powershell.exe
5044	powershell.exe
3456	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-1-5-21-2593460650-190333679-3676257533-1000\Control Panel\International\Geo\Nation	embedded.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
932	embedded.exe
768	SubDir.exe
3608	SubDir.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-1-5-21-2593460650-190333679-3676257533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SubDir = "C:\\Users\\Admin\\AppData\\Roaming\\SubDir.exe"	embedded.exe

Deobfuscate/Decode Files or Information 1 TTPs 1 IoCs

Payload decoded via CertUtil.

defense_evasion

Deobfuscate/Decode Files or Information

T1140

pid	Process
4052	certutil.exe

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
3376	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
3456	powershell.exe
3456	powershell.exe
452	powershell.exe
452	powershell.exe
4984	powershell.exe
4984	powershell.exe
5044	powershell.exe
5044	powershell.exe
932	embedded.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	932	embedded.exe
Token: SeDebugPrivilege	3456	powershell.exe
Token: SeDebugPrivilege	452	powershell.exe
Token: SeDebugPrivilege	4984	powershell.exe
Token: SeDebugPrivilege	5044	powershell.exe
Token: SeDebugPrivilege	932	embedded.exe
Token: SeDebugPrivilege	768	SubDir.exe
Token: SeDebugPrivilege	3608	SubDir.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
932	embedded.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 3372 wrote to memory of 4052	3372	cmd.exe	88
PID 3372 wrote to memory of 4052	3372	cmd.exe	88
PID 3372 wrote to memory of 932	3372	cmd.exe	89
PID 3372 wrote to memory of 932	3372	cmd.exe	89
PID 932 wrote to memory of 3456	932	embedded.exe	98
PID 932 wrote to memory of 3456	932	embedded.exe	98
PID 932 wrote to memory of 452	932	embedded.exe	101
PID 932 wrote to memory of 452	932	embedded.exe	101
PID 932 wrote to memory of 4984	932	embedded.exe	104
PID 932 wrote to memory of 4984	932	embedded.exe	104
PID 932 wrote to memory of 5044	932	embedded.exe	106
PID 932 wrote to memory of 5044	932	embedded.exe	106
PID 932 wrote to memory of 3376	932	embedded.exe	108
PID 932 wrote to memory of 3376	932	embedded.exe	108

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:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\GXK5E_fsdjgfsdhnfgsd.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:3372
- C:\Windows\system32\certutil.exe
  certutil -decode "C:\Users\Admin\AppData\Local\Temp\embedded.b64" "C:\Users\Admin\AppData\Local\Temp\embedded.exe"
  2⤵
  - Deobfuscate/Decode Files or Information
  PID:4052
- C:\Users\Admin\AppData\Local\Temp\embedded.exe
  "C:\Users\Admin\AppData\Local\Temp\embedded.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:932
- - 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\embedded.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3456
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'embedded.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:452
- - 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\SubDir.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4984
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'SubDir.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:5044
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "SubDir" /tr "C:\Users\Admin\AppData\Roaming\SubDir.exe"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3376

C:\Users\Admin\AppData\Roaming\SubDir.exe
C:\Users\Admin\AppData\Roaming\SubDir.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:768

C:\Users\Admin\AppData\Roaming\SubDir.exe
C:\Users\Admin\AppData\Roaming\SubDir.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3608

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Deobfuscate/Decode Files or Information

Modify Registry

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
944B

MD5
d28a889fd956d5cb3accfbaf1143eb6f

SHA1
157ba54b365341f8ff06707d996b3635da8446f7

SHA256
21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

SHA512
0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

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

Filesize
944B

MD5
1400b7208465e875d44190b9b465fcfb

SHA1
ffd77f7fe78207e5a862b4f536d902019a155e26

SHA256
4fc3a908a25bf9861afb2ec7b3f854fadd986ac281b134cb4e89e46ba6aed0c5

SHA512
57596642a72347985ae9dda5a9e8d01a5c6cbeb5fac227d69fa1fbf38ae867ea4f434f9aec8b990ca397295886ce503abad49efed2f6ea7fdd6bf5d803bf1f38

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

Filesize
944B

MD5
f41f42c322498af0591f396c59dd4304

SHA1
e1e5aa68d73d48bc5e743a34f6c0fa8960ff7514

SHA256
d8bd9a4a363ff2ac2dc887759ec6ba4215a4ce0925a8fb9c531573458ee4a31c

SHA512
2328a1b402b4fb0de9c451fb630eab58549129d3bcfb70b9834cfbd16065ebaadec006b309ea17ac182d34c53e01705cbc9e0196eb0cbd62600c866e79a1844f

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_g4v5h4iu.u1g.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\embedded.b64

Filesize
59KB

MD5
476b3a0d11e655cba521f65a6fb7ccf5

SHA1
ac7f49b99763623d027c1304a49e1e45919d3f4b

SHA256
38d8568e0998d1d0c7e2db397e789e47b2a23ff5aad08997bfa07c467b19653e

SHA512
5d0b9ae14ffaa6adcc5be48abc42cdf02b7f46a90233f4b5993ff986bec7998b51a6ff0132b780e12a907c031a03661a59ee44649d32e79f17b3d8697e64f849

Download Submit
C:\Users\Admin\AppData\Local\Temp\embedded.exe

Filesize
43KB

MD5
f730dc4b0cebd71d388820cfa959cc25

SHA1
4a9513caec0e605309770c20e983d400e0246d51

SHA256
24472004e0e2f6bd1e9205c4d16138bb5bf8e482e91400dcb137db4099e582ea

SHA512
b5bbdc24b8c4a984b069cceaee04beb6441891ba9723ad0af5e2fd93abaa320dda385f67844d6827c186bd9594fe04b93cfa2a9aa1a4ed6ff61969875a273deb

Download Submit
memory/932-7-0x00000000005A0000-0x00000000005B2000-memory.dmp

Filesize
72KB

Download
memory/932-6-0x00007FF9AD1E3000-0x00007FF9AD1E5000-memory.dmp

Filesize
8KB

Download
memory/932-58-0x00007FF9AD1E0000-0x00007FF9ADCA1000-memory.dmp

Filesize
10.8MB

Download
memory/932-59-0x00007FF9AD1E3000-0x00007FF9AD1E5000-memory.dmp

Filesize
8KB

Download
memory/932-60-0x00007FF9AD1E0000-0x00007FF9ADCA1000-memory.dmp

Filesize
10.8MB

Download
memory/3456-17-0x000001D65BA90000-0x000001D65BAB2000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads