purelogstealer | 585d1fb4f288974b683c5abfb10c97d7d2ae3f59c2bcfd78ba272e3be2cd7815

Analysis

max time kernel
150s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
16-05-2024 12:16

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General

Target

msfiler.exe
Size

419KB
MD5

8a716466aa6f2d425ec09770626e8e54
SHA1

62fb757ea5098651331f91c1664db9fe46b21879
SHA256

585d1fb4f288974b683c5abfb10c97d7d2ae3f59c2bcfd78ba272e3be2cd7815
SHA512

54f11067e400347834689b4532ae53b00ec96a3ca90a2c21de27942f4ca30306fdda0522c1a3a4cde047ad650162e2d8313205220acaab4cc60e010965690940
SSDEEP

6144:QTCsE3O4yuS5O0RBOInaCa6G6ypdf4Bf7e/DnjBeq04fVXOUvE0CGsSE9BLM:2E3O5uOO0mInnGZCTS84fZLtw

Score

10^/10

purelogstealer xworm execution rat stealer trojan

Malware Config

Extracted

Family

xworm

Version

5.0

5.182.87.154:7000

Mutex

VMFidhoqn75fm5lJ

Attributes

Install_directory
%Temp%
install_file
mdnsresp.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/4992-10-0x0000000000400000-0x0000000000410000-memory.dmp	family_xworm

PureLog Stealer
PureLog Stealer is an infostealer written in C#.
stealer purelogstealer

PureLog Stealer payload 1 IoCs

resource	yara_rule
behavioral2/memory/220-5-0x00000000058E0000-0x0000000005928000-memory.dmp	family_purelog_stealer

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
64	powershell.exe
4920	powershell.exe
1944	powershell.exe
4816	powershell.exe

Checks computer location settings 2 TTPs 2 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	msfiler.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	msfiler.exe

Drops startup file 2 IoCs

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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 220 set thread context of 4992	220	msfiler.exe	86

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3708	powershell.exe
3708	powershell.exe
4816	powershell.exe
4816	powershell.exe
64	powershell.exe
64	powershell.exe
4920	powershell.exe
4920	powershell.exe
1944	powershell.exe
1944	powershell.exe
4992	msfiler.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	220	msfiler.exe
Token: SeDebugPrivilege	4992	msfiler.exe
Token: SeDebugPrivilege	3708	powershell.exe
Token: SeDebugPrivilege	4816	powershell.exe
Token: SeDebugPrivilege	64	powershell.exe
Token: SeDebugPrivilege	4920	powershell.exe
Token: SeDebugPrivilege	1944	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4992	msfiler.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 220 wrote to memory of 3708	220	msfiler.exe	84
PID 220 wrote to memory of 3708	220	msfiler.exe	84
PID 220 wrote to memory of 3708	220	msfiler.exe	84
PID 220 wrote to memory of 4992	220	msfiler.exe	86
PID 220 wrote to memory of 4992	220	msfiler.exe	86
PID 220 wrote to memory of 4992	220	msfiler.exe	86
PID 220 wrote to memory of 4992	220	msfiler.exe	86
PID 220 wrote to memory of 4992	220	msfiler.exe	86
PID 220 wrote to memory of 4992	220	msfiler.exe	86
PID 220 wrote to memory of 4992	220	msfiler.exe	86
PID 220 wrote to memory of 4992	220	msfiler.exe	86
PID 4992 wrote to memory of 4816	4992	msfiler.exe	91
PID 4992 wrote to memory of 4816	4992	msfiler.exe	91
PID 4992 wrote to memory of 4816	4992	msfiler.exe	91
PID 4992 wrote to memory of 64	4992	msfiler.exe	95
PID 4992 wrote to memory of 64	4992	msfiler.exe	95
PID 4992 wrote to memory of 64	4992	msfiler.exe	95
PID 4992 wrote to memory of 4920	4992	msfiler.exe	98
PID 4992 wrote to memory of 4920	4992	msfiler.exe	98
PID 4992 wrote to memory of 4920	4992	msfiler.exe	98
PID 4992 wrote to memory of 1944	4992	msfiler.exe	100
PID 4992 wrote to memory of 1944	4992	msfiler.exe	100
PID 4992 wrote to memory of 1944	4992	msfiler.exe	100

C:\Users\Admin\AppData\Local\Temp\msfiler.exe
"C:\Users\Admin\AppData\Local\Temp\msfiler.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:220
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc QQBkAGQALQBNAHAAUAByAGUAZgBlAHIAZQBuAGMAZQAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgAEMAOgBcAFUAcwBlAHIAcwBcAEEAZABtAGkAbgBcAEEAcABwAEQAYQB0AGEAXABMAG8AYwBhAGwAXABUAGUAbQBwAFwAbQBzAGYAaQBsAGUAcgAuAGUAeABlADsAIABBAGQAZAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAALQBFAHgAYwBsAHUAcwBpAG8AbgBQAHIAbwBjAGUAcwBzACAAbQBzAGYAaQBsAGUAcgAuAGUAeABlADsA
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3708
- C:\Users\Admin\AppData\Local\Temp\msfiler.exe
  C:\Users\Admin\AppData\Local\Temp\msfiler.exe
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4992
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\msfiler.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4816
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'msfiler.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:64
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\mdnsresp.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4920
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'mdnsresp.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1944

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

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
968cb9309758126772781b83adb8a28f

SHA1
8da30e71accf186b2ba11da1797cf67f8f78b47c

SHA256
92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

SHA512
4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

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

Filesize
18KB

MD5
db56d47655157e6f9c111379ba509a22

SHA1
605c2bda416607c031748c55cef14c3fadf13029

SHA256
c3d4b6e9a8094c1d08ee45de21c3b35b4e853e4c95c974e2b708e05c93cdba3f

SHA512
c9e268ebc3cf54710530609892969722804ac5a3c3cc2d07dedbb15cadbb54f3e7a55b6c84c0292b6e44a6116320e242437903438be7733176f3508f127e9f49

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

Filesize
18KB

MD5
7166995ffaa9d58e9ca424c945f5fbef

SHA1
ecb2fc17b5e45dc304b0f747dd74a893389ba7f2

SHA256
e17181eae55eff53c8daf8fccacc5b14e57b03799665d2cc99a19ae3d45e418e

SHA512
d8f1e6085406900fdae9a1b332421c34aed92c6af07719f39126137a63a7cbb2fb6ae6e0d819f38047e1940af8d7e7bcc168836f255d7f6f775534acc60cca0c

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

Filesize
18KB

MD5
2c62f850a33f1bb1827ad19ce52c47a6

SHA1
4bf0c718cd5c596cd0d8ab8e813a6ef6794c85b0

SHA256
f19bd12dce60623bb09785a293658c645ced72845d246ae5c3696f0086c362c9

SHA512
04fc3ec90a20b91b9a376e03cf848a129c04c552b14b288bdfe609ad3de7350c26619fb4ada14be422dd723b050ed4165090dd8cf0247a3a8442c9916a4a4952

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_k5de0ajg.k0z.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/64-92-0x0000000005F80000-0x0000000005FCC000-memory.dmp

Filesize
304KB

Download
memory/64-93-0x0000000070F40000-0x0000000070F8C000-memory.dmp

Filesize
304KB

Download
memory/64-103-0x00000000071A0000-0x0000000007243000-memory.dmp

Filesize
652KB

Download
memory/64-104-0x0000000007470000-0x0000000007481000-memory.dmp

Filesize
68KB

Download
memory/64-105-0x00000000074A0000-0x00000000074B4000-memory.dmp

Filesize
80KB

Download
memory/220-5-0x00000000058E0000-0x0000000005928000-memory.dmp

Filesize
288KB

Download
memory/220-13-0x0000000074AC0000-0x0000000075270000-memory.dmp

Filesize
7.7MB

Download
memory/220-9-0x00000000059F0000-0x0000000005A3C000-memory.dmp

Filesize
304KB

Download
memory/220-8-0x0000000005990000-0x00000000059C0000-memory.dmp

Filesize
192KB

Download
memory/220-6-0x0000000074AC0000-0x0000000075270000-memory.dmp

Filesize
7.7MB

Download
memory/220-7-0x0000000005960000-0x0000000005990000-memory.dmp

Filesize
192KB

Download
memory/220-4-0x0000000005860000-0x000000000586A000-memory.dmp

Filesize
40KB

Download
memory/220-3-0x00000000056D0000-0x0000000005762000-memory.dmp

Filesize
584KB

Download
memory/220-2-0x0000000005BE0000-0x0000000006184000-memory.dmp

Filesize
5.6MB

Download
memory/220-1-0x0000000000C50000-0x0000000000CC0000-memory.dmp

Filesize
448KB

Download
memory/220-0-0x0000000074ACE000-0x0000000074ACF000-memory.dmp

Filesize
4KB

Download
memory/1944-138-0x0000000070F40000-0x0000000070F8C000-memory.dmp

Filesize
304KB

Download
memory/3708-35-0x0000000006D20000-0x0000000006D52000-memory.dmp

Filesize
200KB

Download
memory/3708-75-0x0000000007DC0000-0x0000000007DC8000-memory.dmp

Filesize
32KB

Download
memory/3708-33-0x0000000006770000-0x000000000678E000-memory.dmp

Filesize
120KB

Download
memory/3708-34-0x0000000006820000-0x000000000686C000-memory.dmp

Filesize
304KB

Download
memory/3708-22-0x0000000006070000-0x00000000060D6000-memory.dmp

Filesize
408KB

Download
memory/3708-36-0x00000000708D0000-0x000000007091C000-memory.dmp

Filesize
304KB

Download
memory/3708-46-0x0000000006D70000-0x0000000006D8E000-memory.dmp

Filesize
120KB

Download
memory/3708-47-0x00000000077D0000-0x0000000007873000-memory.dmp

Filesize
652KB

Download
memory/3708-57-0x0000000008100000-0x000000000877A000-memory.dmp

Filesize
6.5MB

Download
memory/3708-58-0x0000000007AA0000-0x0000000007ABA000-memory.dmp

Filesize
104KB

Download
memory/3708-59-0x0000000007B10000-0x0000000007B1A000-memory.dmp

Filesize
40KB

Download
memory/3708-60-0x0000000007D20000-0x0000000007DB6000-memory.dmp

Filesize
600KB

Download
memory/3708-61-0x0000000007CA0000-0x0000000007CB1000-memory.dmp

Filesize
68KB

Download
memory/3708-62-0x0000000007CD0000-0x0000000007CDE000-memory.dmp

Filesize
56KB

Download
memory/3708-15-0x00000000031A0000-0x00000000031D6000-memory.dmp

Filesize
216KB

Download
memory/3708-73-0x0000000007CE0000-0x0000000007CF4000-memory.dmp

Filesize
80KB

Download
memory/3708-74-0x0000000007DE0000-0x0000000007DFA000-memory.dmp

Filesize
104KB

Download
memory/3708-32-0x00000000061E0000-0x0000000006534000-memory.dmp

Filesize
3.3MB

Download
memory/3708-78-0x0000000074AC0000-0x0000000075270000-memory.dmp

Filesize
7.7MB

Download
memory/3708-20-0x00000000057D0000-0x00000000057F2000-memory.dmp

Filesize
136KB

Download
memory/3708-21-0x0000000005F50000-0x0000000005FB6000-memory.dmp

Filesize
408KB

Download
memory/3708-19-0x0000000074AC0000-0x0000000075270000-memory.dmp

Filesize
7.7MB

Download
memory/3708-17-0x00000000058B0000-0x0000000005ED8000-memory.dmp

Filesize
6.2MB

Download
memory/3708-18-0x0000000074AC0000-0x0000000075270000-memory.dmp

Filesize
7.7MB

Download
memory/3708-16-0x0000000074AC0000-0x0000000075270000-memory.dmp

Filesize
7.7MB

Download
memory/4816-63-0x00000000708D0000-0x000000007091C000-memory.dmp

Filesize
304KB

Download
memory/4920-117-0x0000000070F40000-0x0000000070F8C000-memory.dmp

Filesize
304KB

Download
memory/4992-14-0x0000000005600000-0x000000000569C000-memory.dmp

Filesize
624KB

Download
memory/4992-12-0x0000000074AC0000-0x0000000075270000-memory.dmp

Filesize
7.7MB

Download
memory/4992-10-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/4992-153-0x0000000074AC0000-0x0000000075270000-memory.dmp

Filesize
7.7MB

Download
memory/4992-154-0x0000000074AC0000-0x0000000075270000-memory.dmp

Filesize
7.7MB

Download
memory/4992-155-0x0000000074AC0000-0x0000000075270000-memory.dmp

Filesize
7.7MB

Download