xworm | d2576bc16040874601b4371730e07206214ef2e68c65963aacd90a37502ee75c

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
03/04/2024, 04:10

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General

Target
yes.exe
Size 81KB
Sample240403-erqe2sff7t
SHA256 d2576bc16040874601b4371730e07206214ef2e68c65963aacd90a37502ee75c
MD5 5f4287a277adc0f54e9a4a5ae5054506
SHA1 59578435b059664960c540e9554e6e64b71f04b4
SHA512 88364c81e3b49dd2a6dd6458a29a70339f4897b95852a33efa099d7ece9254faf86990736906f241bdd76a81464ca9e75ef021bedefc2a375e76b48495fbebce
SSDEEP 1536:ZQPPhvmXq3AlGuRpsKs5XQfHkyJuQQ/7Pw3NZyKkY74+MDBevjbcU5NRQrM:ZQ3QXq3cuAfEbQQTw3NwKc+MQLbvNRQQ
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm rat trojan

Malware Config

Signatures

Detect Xworm Payload 5 IoCs

resource	yara_rule
behavioral2/memory/2120-5-0x0000000000400000-0x0000000000418000-memory.dmp	family_xworm
behavioral2/memory/2120-6-0x0000000000400000-0x0000000000418000-memory.dmp	family_xworm
behavioral2/memory/2120-9-0x0000000000400000-0x0000000000418000-memory.dmp	family_xworm
behavioral2/memory/2120-12-0x0000000000400000-0x0000000000418000-memory.dmp	family_xworm
behavioral2/memory/2120-14-0x0000000000400000-0x0000000000418000-memory.dmp	family_xworm

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

Legitimate hosting services abused for malware hosting/C2 1 TTPs 44 IoCs

Web Service

T1102

flow	ioc
38	raw.githubusercontent.com
46	raw.githubusercontent.com
15	raw.githubusercontent.com
20	raw.githubusercontent.com
25	raw.githubusercontent.com
44	raw.githubusercontent.com
48	raw.githubusercontent.com
22	raw.githubusercontent.com
34	raw.githubusercontent.com
36	raw.githubusercontent.com
18	raw.githubusercontent.com
37	raw.githubusercontent.com
41	raw.githubusercontent.com
5	raw.githubusercontent.com
12	raw.githubusercontent.com
17	raw.githubusercontent.com
28	raw.githubusercontent.com
42	raw.githubusercontent.com
45	raw.githubusercontent.com
8	raw.githubusercontent.com
10	raw.githubusercontent.com
13	raw.githubusercontent.com
35	raw.githubusercontent.com
40	raw.githubusercontent.com
19	raw.githubusercontent.com
26	raw.githubusercontent.com
30	raw.githubusercontent.com
43	raw.githubusercontent.com
49	raw.githubusercontent.com
4	raw.githubusercontent.com
27	raw.githubusercontent.com
33	raw.githubusercontent.com
23	raw.githubusercontent.com
47	raw.githubusercontent.com
9	raw.githubusercontent.com
16	raw.githubusercontent.com
21	raw.githubusercontent.com
29	raw.githubusercontent.com
31	raw.githubusercontent.com
32	raw.githubusercontent.com
39	raw.githubusercontent.com
11	raw.githubusercontent.com
14	raw.githubusercontent.com
24	raw.githubusercontent.com

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2364 set thread context of 2120	2364	yes.exe	30

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
2364	yes.exe
2364	yes.exe
2644	powershell.exe
2656	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2364	yes.exe
Token: SeDebugPrivilege	2120	RegAsm.exe
Token: SeDebugPrivilege	2644	powershell.exe
Token: SeDebugPrivilege	2656	powershell.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 2364 wrote to memory of 272	2364	yes.exe	28
PID 2364 wrote to memory of 272	2364	yes.exe	28
PID 2364 wrote to memory of 272	2364	yes.exe	28
PID 2364 wrote to memory of 272	2364	yes.exe	28
PID 2364 wrote to memory of 272	2364	yes.exe	28
PID 2364 wrote to memory of 272	2364	yes.exe	28
PID 2364 wrote to memory of 272	2364	yes.exe	28
PID 2364 wrote to memory of 1804	2364	yes.exe	29
PID 2364 wrote to memory of 1804	2364	yes.exe	29
PID 2364 wrote to memory of 1804	2364	yes.exe	29
PID 2364 wrote to memory of 1804	2364	yes.exe	29
PID 2364 wrote to memory of 1804	2364	yes.exe	29
PID 2364 wrote to memory of 1804	2364	yes.exe	29
PID 2364 wrote to memory of 1804	2364	yes.exe	29
PID 2364 wrote to memory of 2120	2364	yes.exe	30
PID 2364 wrote to memory of 2120	2364	yes.exe	30
PID 2364 wrote to memory of 2120	2364	yes.exe	30
PID 2364 wrote to memory of 2120	2364	yes.exe	30
PID 2364 wrote to memory of 2120	2364	yes.exe	30
PID 2364 wrote to memory of 2120	2364	yes.exe	30
PID 2364 wrote to memory of 2120	2364	yes.exe	30
PID 2364 wrote to memory of 2120	2364	yes.exe	30
PID 2364 wrote to memory of 2120	2364	yes.exe	30
PID 2364 wrote to memory of 2120	2364	yes.exe	30
PID 2364 wrote to memory of 2120	2364	yes.exe	30
PID 2364 wrote to memory of 2120	2364	yes.exe	30
PID 2120 wrote to memory of 2644	2120	RegAsm.exe	31
PID 2120 wrote to memory of 2644	2120	RegAsm.exe	31
PID 2120 wrote to memory of 2644	2120	RegAsm.exe	31
PID 2120 wrote to memory of 2644	2120	RegAsm.exe	31
PID 2120 wrote to memory of 2656	2120	RegAsm.exe	33
PID 2120 wrote to memory of 2656	2120	RegAsm.exe	33
PID 2120 wrote to memory of 2656	2120	RegAsm.exe	33
PID 2120 wrote to memory of 2656	2120	RegAsm.exe	33

C:\Users\Admin\AppData\Local\Temp\yes.exe
"C:\Users\Admin\AppData\Local\Temp\yes.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2364
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  #cmd
  2⤵
  PID:272
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  #cmd
  2⤵
  PID:1804
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  #cmd
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2120
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe'
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2644
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'RegAsm.exe'
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2656

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

94308059B57B3142E455B38A6EB92015

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
Size 68KB
SHA256 1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184
MD5 29f65ba8e88c063813cc50a4ea544e93
SHA1 05a7040d5c127e68c25d81cc51271ffb8bef3568
SHA512 e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa
SSDEEP 1536:iMveRG6BWC7T2g1wGUa5QUoaIB9ttiFJG+AOQOXl0Usvwr:feRG6BX6gUaHo9tkBHiUewr
MD5 SHA1 SHA512 SSDEEP

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Tar3589.tmp

Path C:\Users\Admin\AppData\Local\Temp\Tar3589.tmp
Size 177KB
SHA256 67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34
MD5 435a9ac180383f9fa094131b173a2f7b
SHA1 76944ea657a9db94f9a4bef38f88c46ed4166983
SHA512 1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a
SSDEEP 1536:fAo/J+lCUsTRvsqgCyqWlUDNWdm1wpSru2A0XwjY/z02DTr3rmt6mJ:f/J+qTR0XCy/dmASru2Aijbdq
MD5 SHA1 SHA512 SSDEEP

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d93f411851d7c929.customDestinations-ms

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms
Size 7KB
SHA256 8ce9ba224f06e0dc583364827527b783ca965f05d201db8545689564b74ab59a
MD5 8423282a3f3957cad4f23b325dc3d8fb
SHA1 be92af129111166b7e021cd59711202b69138f38
SHA512 9e29788672ad7187ec19da9e9ae99b2a888e7e8394846cadb3070eabc3e750bc4041f0f156eeed7cff146ba78ca5f32855142aa30bf9942f96d777e053f67908
SSDEEP 96:YAqqCZM8JnqvsqvJCwoBAqqCZM8JnqvsEHyqvJCworP1UBQHuZ7qDXlUVs:obFUofbFAHnorPUjZ7qDr
MD5 SHA1 SHA512 SSDEEP

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memory/2120-6-0x0000000000400000-0x0000000000418000-memory.dmp

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memory/2120-4-0x0000000000400000-0x0000000000418000-memory.dmp

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memory/2120-5-0x0000000000400000-0x0000000000418000-memory.dmp

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memory/2120-3-0x0000000000400000-0x0000000000418000-memory.dmp

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memory/2120-7-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

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memory/2120-9-0x0000000000400000-0x0000000000418000-memory.dmp

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memory/2120-12-0x0000000000400000-0x0000000000418000-memory.dmp

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memory/2120-14-0x0000000000400000-0x0000000000418000-memory.dmp

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memory/2364-11-0x00000000742C0000-0x00000000749AE000-memory.dmp

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memory/2364-0-0x0000000000060000-0x000000000007A000-memory.dmp

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memory/2364-2-0x0000000000500000-0x0000000000540000-memory.dmp

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memory/2364-1-0x00000000742C0000-0x00000000749AE000-memory.dmp

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memory/2644-17-0x00000000707C0000-0x0000000070D6B000-memory.dmp

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memory/2644-21-0x00000000707C0000-0x0000000070D6B000-memory.dmp

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memory/2644-18-0x00000000707C0000-0x0000000070D6B000-memory.dmp

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memory/2644-20-0x0000000000330000-0x0000000000370000-memory.dmp

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memory/2644-19-0x0000000000330000-0x0000000000370000-memory.dmp

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memory/2656-27-0x00000000704D0000-0x0000000070A7B000-memory.dmp

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memory/2656-28-0x0000000002A10000-0x0000000002A50000-memory.dmp

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memory/2656-29-0x00000000704D0000-0x0000000070A7B000-memory.dmp

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memory/2656-30-0x00000000704D0000-0x0000000070A7B000-memory.dmp

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memory/2656-31-0x0000000002A10000-0x0000000002A50000-memory.dmp

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memory/2656-32-0x00000000704D0000-0x0000000070A7B000-memory.dmp

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