purelogstealer | 64b58794801f282e92571676e3571afc5c59033c262406bf0d36e1d6ef3cda6a

Resubmissions

13-11-2024 14:15

241113-rkm3kasphs 10

22-08-2024 04:20

240822-eygfqayaqg 10

Analysis

max time kernel
136s
max time network
139s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
22-08-2024 04:20

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General

Target

64b58794801f282e92571676e3571afc5c59033c262406bf0d36e1d6ef3cda6a.exe
Size

924KB
MD5

de64bb0f39113e48a8499d3401461cf8
SHA1

8d78c2d4701e4596e87e3f09adde214a2a2033e8
SHA256

64b58794801f282e92571676e3571afc5c59033c262406bf0d36e1d6ef3cda6a
SHA512

35b7cdcfb866dcdc79be34066a9ad5a8058b80e68925aeb23708606149841022de17e9d205389c13803c01e356174a2f657773df7d53f889e4e1fc1d68074179
SSDEEP

24576:NAHFp2K15zXnjfQb6+jFb5RIAJTOcA4gnPdCPPd7wm:WHf15zM5JbtA4wPdCnd75

Score

10^/10

purelogstealer discovery persistence stealer

Malware Config

Signatures

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

PureLog Stealer payload 2 IoCs

resource	yara_rule
behavioral1/memory/2648-1-0x00000000007E0000-0x00000000008CE000-memory.dmp	family_purelog_stealer
behavioral1/files/0x000700000002347d-1098.dat	family_purelog_stealer

Suspicious use of NtCreateUserProcessOtherParentProcess 2 IoCs

description	pid	Process	procid_target
PID 2648 created 3580	2648	64b58794801f282e92571676e3571afc5c59033c262406bf0d36e1d6ef3cda6a.exe	56
PID 4172 created 3580	4172	rfsi.exe	56

Executes dropped EXE 3 IoCs

pid	Process
4172	rfsi.exe
2904	rfsi.exe
5028	rfsi.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-1-5-21-355097885-2402257403-2971294179-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\afasdfga = "C:\\Users\\Admin\\AppData\\Roaming\\afasdfga.exe"	64b58794801f282e92571676e3571afc5c59033c262406bf0d36e1d6ef3cda6a.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2648 set thread context of 2236	2648	64b58794801f282e92571676e3571afc5c59033c262406bf0d36e1d6ef3cda6a.exe	96
PID 4172 set thread context of 2904	4172	rfsi.exe	110

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\Test Task17.job	64b58794801f282e92571676e3571afc5c59033c262406bf0d36e1d6ef3cda6a.exe

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	rfsi.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rfsi.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	64b58794801f282e92571676e3571afc5c59033c262406bf0d36e1d6ef3cda6a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	64b58794801f282e92571676e3571afc5c59033c262406bf0d36e1d6ef3cda6a.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2648	64b58794801f282e92571676e3571afc5c59033c262406bf0d36e1d6ef3cda6a.exe
4172	rfsi.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2648	64b58794801f282e92571676e3571afc5c59033c262406bf0d36e1d6ef3cda6a.exe
Token: SeDebugPrivilege	2648	64b58794801f282e92571676e3571afc5c59033c262406bf0d36e1d6ef3cda6a.exe
Token: SeDebugPrivilege	4172	rfsi.exe
Token: SeDebugPrivilege	4172	rfsi.exe
Token: SeDebugPrivilege	5028	rfsi.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2648 wrote to memory of 2236	2648	64b58794801f282e92571676e3571afc5c59033c262406bf0d36e1d6ef3cda6a.exe	96
PID 2648 wrote to memory of 2236	2648	64b58794801f282e92571676e3571afc5c59033c262406bf0d36e1d6ef3cda6a.exe	96
PID 2648 wrote to memory of 2236	2648	64b58794801f282e92571676e3571afc5c59033c262406bf0d36e1d6ef3cda6a.exe	96
PID 2648 wrote to memory of 2236	2648	64b58794801f282e92571676e3571afc5c59033c262406bf0d36e1d6ef3cda6a.exe	96
PID 2648 wrote to memory of 2236	2648	64b58794801f282e92571676e3571afc5c59033c262406bf0d36e1d6ef3cda6a.exe	96
PID 2648 wrote to memory of 2236	2648	64b58794801f282e92571676e3571afc5c59033c262406bf0d36e1d6ef3cda6a.exe	96
PID 2648 wrote to memory of 2236	2648	64b58794801f282e92571676e3571afc5c59033c262406bf0d36e1d6ef3cda6a.exe	96
PID 2648 wrote to memory of 2236	2648	64b58794801f282e92571676e3571afc5c59033c262406bf0d36e1d6ef3cda6a.exe	96
PID 4172 wrote to memory of 2904	4172	rfsi.exe	110
PID 4172 wrote to memory of 2904	4172	rfsi.exe	110
PID 4172 wrote to memory of 2904	4172	rfsi.exe	110
PID 4172 wrote to memory of 2904	4172	rfsi.exe	110
PID 4172 wrote to memory of 2904	4172	rfsi.exe	110
PID 4172 wrote to memory of 2904	4172	rfsi.exe	110
PID 4172 wrote to memory of 2904	4172	rfsi.exe	110
PID 4172 wrote to memory of 2904	4172	rfsi.exe	110

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3580
- C:\Users\Admin\AppData\Local\Temp\64b58794801f282e92571676e3571afc5c59033c262406bf0d36e1d6ef3cda6a.exe
  "C:\Users\Admin\AppData\Local\Temp\64b58794801f282e92571676e3571afc5c59033c262406bf0d36e1d6ef3cda6a.exe"
  2⤵
  - Suspicious use of NtCreateUserProcessOtherParentProcess
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2648
- C:\Users\Admin\AppData\Local\Temp\64b58794801f282e92571676e3571afc5c59033c262406bf0d36e1d6ef3cda6a.exe
  "C:\Users\Admin\AppData\Local\Temp\64b58794801f282e92571676e3571afc5c59033c262406bf0d36e1d6ef3cda6a.exe"
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  PID:2236
- C:\ProgramData\dpvron\rfsi.exe
  "C:\ProgramData\dpvron\rfsi.exe"
  2⤵
  - Executes dropped EXE
  PID:2904

C:\ProgramData\dpvron\rfsi.exe
C:\ProgramData\dpvron\rfsi.exe
1⤵
- Suspicious use of NtCreateUserProcessOtherParentProcess
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4172

C:\ProgramData\dpvron\rfsi.exe
C:\ProgramData\dpvron\rfsi.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:5028

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\dpvron\rfsi.exe

Filesize
924KB

MD5
de64bb0f39113e48a8499d3401461cf8

SHA1
8d78c2d4701e4596e87e3f09adde214a2a2033e8

SHA256
64b58794801f282e92571676e3571afc5c59033c262406bf0d36e1d6ef3cda6a

SHA512
35b7cdcfb866dcdc79be34066a9ad5a8058b80e68925aeb23708606149841022de17e9d205389c13803c01e356174a2f657773df7d53f889e4e1fc1d68074179

Download Submit
memory/2236-1094-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2648-0-0x0000000074B4E000-0x0000000074B4F000-memory.dmp

Filesize
4KB

Download
memory/2648-1-0x00000000007E0000-0x00000000008CE000-memory.dmp

Filesize
952KB

Download
memory/2648-2-0x0000000074B40000-0x00000000752F0000-memory.dmp

Filesize
7.7MB

Download
memory/2648-3-0x00000000051B0000-0x000000000528C000-memory.dmp

Filesize
880KB

Download
memory/2648-4-0x00000000053B0000-0x000000000548E000-memory.dmp

Filesize
888KB

Download
memory/2648-14-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-18-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-50-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-48-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-46-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-44-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-42-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-40-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-36-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-34-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-32-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-62-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-68-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-66-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-64-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-60-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-58-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-56-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-54-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-52-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-30-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-28-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-26-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-24-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-22-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-20-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-16-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-12-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-10-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-8-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-38-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-6-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-5-0x00000000053B0000-0x0000000005488000-memory.dmp

Filesize
864KB

Download
memory/2648-1077-0x0000000074B40000-0x00000000752F0000-memory.dmp

Filesize
7.7MB

Download
memory/2648-1078-0x00000000054E0000-0x0000000005538000-memory.dmp

Filesize
352KB

Download
memory/2648-1079-0x0000000005540000-0x000000000558C000-memory.dmp

Filesize
304KB

Download
memory/2648-1083-0x0000000074B40000-0x00000000752F0000-memory.dmp

Filesize
7.7MB

Download
memory/2648-1084-0x0000000074B40000-0x00000000752F0000-memory.dmp

Filesize
7.7MB

Download
memory/2648-1085-0x0000000074B40000-0x00000000752F0000-memory.dmp

Filesize
7.7MB

Download
memory/2648-1086-0x0000000074B4E000-0x0000000074B4F000-memory.dmp

Filesize
4KB

Download
memory/2648-1087-0x0000000005EE0000-0x0000000006484000-memory.dmp

Filesize
5.6MB

Download
memory/2648-1088-0x0000000005620000-0x0000000005674000-memory.dmp

Filesize
336KB

Download
memory/2648-1096-0x0000000074B40000-0x00000000752F0000-memory.dmp

Filesize
7.7MB

Download
memory/4172-1101-0x00000000744B0000-0x0000000074C60000-memory.dmp

Filesize
7.7MB

Download
memory/4172-1100-0x00000000744BE000-0x00000000744BF000-memory.dmp

Filesize
4KB

Download
memory/4172-2174-0x00000000744B0000-0x0000000074C60000-memory.dmp

Filesize
7.7MB

Download
memory/4172-2178-0x00000000744B0000-0x0000000074C60000-memory.dmp

Filesize
7.7MB

Download
memory/4172-2179-0x00000000744B0000-0x0000000074C60000-memory.dmp

Filesize
7.7MB

Download
memory/4172-2180-0x00000000744BE000-0x00000000744BF000-memory.dmp

Filesize
4KB

Download
memory/4172-2181-0x00000000744B0000-0x0000000074C60000-memory.dmp

Filesize
7.7MB

Download
memory/4172-2188-0x00000000744B0000-0x0000000074C60000-memory.dmp

Filesize
7.7MB

Download