xworm | a7b10c83d7f95867ba50ec6c6cace3347a8ac906c6a5fd0d5379fe54aa640b58

General

Target

a7b10c83d7f95867ba50ec6c6cace3347a8ac906c6a5fd0d5379fe54aa640b58N.exe
Size

600KB
MD5

0af109949c3f505614433bb241532ad0
SHA1

dba62ebfad2af8c4d7015daebe949fc23d648a43
SHA256

a7b10c83d7f95867ba50ec6c6cace3347a8ac906c6a5fd0d5379fe54aa640b58
SHA512

846383a34fbc014eb2d4f5de368ef50b954439b90db9196b2d9b4f8b53da793350496e40b8e5231e6c831ffa52d9d6e9442f843cdb19f150d5a4f63a1bed8163
SSDEEP

12288:6G4QbzjsO64b7cvsETjor20vipRugJQqPZnv2SGUbeAKYeGTYzwYzdqmxyKNnNqm:d4QbzgO64b7cvnDsgUdy2N

Score

10^/10

xworm discovery execution rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

Mutex

hTiTQSR18tmk2nlC

Attributes

install_file
wintousb.exe

aes.plain

Signatures

Detect Xworm Payload 5 IoCs

resource	yara_rule
behavioral1/memory/2348-6-0x0000000000400000-0x0000000000410000-memory.dmp	family_xworm
behavioral1/memory/2348-8-0x0000000000400000-0x0000000000410000-memory.dmp	family_xworm
behavioral1/memory/2348-11-0x0000000000400000-0x0000000000410000-memory.dmp	family_xworm
behavioral1/memory/2348-10-0x0000000000400000-0x0000000000410000-memory.dmp	family_xworm
behavioral1/memory/2348-7-0x0000000000400000-0x0000000000410000-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 2 IoCs

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

execution

PowerShell

T1059.001

pid	Process
1840	powershell.exe
2804	powershell.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 35 IoCs

Web Service

T1102

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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 276 set thread context of 2348	276	a7b10c83d7f95867ba50ec6c6cace3347a8ac906c6a5fd0d5379fe54aa640b58N.exe	31

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a7b10c83d7f95867ba50ec6c6cace3347a8ac906c6a5fd0d5379fe54aa640b58N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1840	powershell.exe
2804	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2348	RegAsm.exe
Token: SeDebugPrivilege	1840	powershell.exe
Token: SeDebugPrivilege	2804	powershell.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 276 wrote to memory of 2348	276	a7b10c83d7f95867ba50ec6c6cace3347a8ac906c6a5fd0d5379fe54aa640b58N.exe	31
PID 276 wrote to memory of 2348	276	a7b10c83d7f95867ba50ec6c6cace3347a8ac906c6a5fd0d5379fe54aa640b58N.exe	31
PID 276 wrote to memory of 2348	276	a7b10c83d7f95867ba50ec6c6cace3347a8ac906c6a5fd0d5379fe54aa640b58N.exe	31
PID 276 wrote to memory of 2348	276	a7b10c83d7f95867ba50ec6c6cace3347a8ac906c6a5fd0d5379fe54aa640b58N.exe	31
PID 276 wrote to memory of 2348	276	a7b10c83d7f95867ba50ec6c6cace3347a8ac906c6a5fd0d5379fe54aa640b58N.exe	31
PID 276 wrote to memory of 2348	276	a7b10c83d7f95867ba50ec6c6cace3347a8ac906c6a5fd0d5379fe54aa640b58N.exe	31
PID 276 wrote to memory of 2348	276	a7b10c83d7f95867ba50ec6c6cace3347a8ac906c6a5fd0d5379fe54aa640b58N.exe	31
PID 276 wrote to memory of 2348	276	a7b10c83d7f95867ba50ec6c6cace3347a8ac906c6a5fd0d5379fe54aa640b58N.exe	31
PID 276 wrote to memory of 2348	276	a7b10c83d7f95867ba50ec6c6cace3347a8ac906c6a5fd0d5379fe54aa640b58N.exe	31
PID 276 wrote to memory of 2348	276	a7b10c83d7f95867ba50ec6c6cace3347a8ac906c6a5fd0d5379fe54aa640b58N.exe	31
PID 276 wrote to memory of 2348	276	a7b10c83d7f95867ba50ec6c6cace3347a8ac906c6a5fd0d5379fe54aa640b58N.exe	31
PID 276 wrote to memory of 2348	276	a7b10c83d7f95867ba50ec6c6cace3347a8ac906c6a5fd0d5379fe54aa640b58N.exe	31
PID 2348 wrote to memory of 1840	2348	RegAsm.exe	32
PID 2348 wrote to memory of 1840	2348	RegAsm.exe	32
PID 2348 wrote to memory of 1840	2348	RegAsm.exe	32
PID 2348 wrote to memory of 1840	2348	RegAsm.exe	32
PID 2348 wrote to memory of 2804	2348	RegAsm.exe	34
PID 2348 wrote to memory of 2804	2348	RegAsm.exe	34
PID 2348 wrote to memory of 2804	2348	RegAsm.exe	34
PID 2348 wrote to memory of 2804	2348	RegAsm.exe	34

C:\Users\Admin\AppData\Local\Temp\a7b10c83d7f95867ba50ec6c6cace3347a8ac906c6a5fd0d5379fe54aa640b58N.exe
"C:\Users\Admin\AppData\Local\Temp\a7b10c83d7f95867ba50ec6c6cace3347a8ac906c6a5fd0d5379fe54aa640b58N.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:276
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2348
- - 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⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1840
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'RegAsm.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2804

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\CabFF57.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\TarFF79.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

Filesize
7KB

MD5
be446104788059965bf9159a62a5d9ba

SHA1
68093eb9240455f1c98064f30560cdf844254c20

SHA256
ff0c3d167520a32159d35fb5fb177c0964962d92f888156a1eba4c038f7d8197

SHA512
7be447693b3b3339d89a05b335369d8af57fd124fe81b3d7acaf2d8cfea6c1458e0a3f9fbd4a98ebeb1e5188419fb2d1e57473b1200cf83bb6427db317e7984f

Download Submit
memory/276-12-0x0000000074AC0000-0x00000000751AE000-memory.dmp

Filesize
6.9MB

Download
memory/276-1-0x0000000000050000-0x00000000000EC000-memory.dmp

Filesize
624KB

Download
memory/276-2-0x0000000000500000-0x000000000050E000-memory.dmp

Filesize
56KB

Download
memory/276-3-0x0000000000510000-0x0000000000518000-memory.dmp

Filesize
32KB

Download
memory/276-4-0x0000000074AC0000-0x00000000751AE000-memory.dmp

Filesize
6.9MB

Download
memory/276-0-0x0000000074ACE000-0x0000000074ACF000-memory.dmp

Filesize
4KB

Download
memory/2348-6-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2348-7-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2348-10-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2348-11-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2348-8-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2348-5-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download

Analysis

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