isrstealer | f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04

Analysis

max time kernel
38s
max time network
46s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
02/12/2022, 20:38

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General

Target

f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe
Size

628KB
MD5

28fb38eebace1b05bf85fcce055de30d
SHA1

f19928ad277eb151b5f3acb84a6d374b6104c2a0
SHA256

f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04
SHA512

318126d77a2cc801fe9392a4cf7f8ef585421d57e0c82e2d96696df4c42a7c8082a534cbf6d427c9cd2c647c15846f39090ca74677fe660a5892a5fc0210443b
SSDEEP

12288:GrsrkkM3BPgVryyifXh8HCQrB5tRjKTJLF3cJlKuvT:Gi49ysunrrP8x3cJlKu7

Score

10^/10

isrstealer collection spyware stealer trojan upx

Malware Config

Signatures

ISR Stealer
ISR Stealer is a modified version of Hackhound Stealer written in visual basic.
trojan stealer isrstealer

ISR Stealer payload 6 IoCs

resource	yara_rule
behavioral1/memory/1496-67-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral1/memory/1496-69-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral1/memory/1496-70-0x00000000004011F8-mapping.dmp	family_isrstealer
behavioral1/memory/1496-74-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral1/memory/1496-120-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral1/memory/1496-121-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/468-113-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/468-115-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/468-119-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 5 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/1468-91-0x000000000043F420-mapping.dmp	WebBrowserPassView
behavioral1/memory/1468-90-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral1/memory/1468-111-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral1/memory/1468-116-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral1/memory/1468-118-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView

Nirsoft 11 IoCs

resource	yara_rule
behavioral1/memory/1468-91-0x000000000043F420-mapping.dmp	Nirsoft
behavioral1/memory/1468-90-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral1/memory/1468-111-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral1/memory/1020-112-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral1/memory/468-113-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/1020-114-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral1/memory/468-115-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/1468-116-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral1/memory/1020-117-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral1/memory/1468-118-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral1/memory/468-119-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 12 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/468-100-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1020-95-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral1/memory/1020-104-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral1/memory/468-105-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1020-109-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral1/memory/468-110-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1020-112-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral1/memory/468-113-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1020-114-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral1/memory/468-115-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1020-117-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral1/memory/468-119-0x0000000000400000-0x000000000041F000-memory.dmp	upx

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe

Suspicious use of SetThreadContext 5 IoCs

description	pid	Process	procid_target
PID 784 set thread context of 1496	784	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	26
PID 1496 set thread context of 1532	1496	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	27
PID 1532 set thread context of 1468	1532	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	28
PID 1532 set thread context of 1020	1532	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	29
PID 1532 set thread context of 468	1532	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	30

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1496	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe
1496	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe
1496	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe
1496	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1020	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
784	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe
1496	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 784 wrote to memory of 1496	784	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	26
PID 784 wrote to memory of 1496	784	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	26
PID 784 wrote to memory of 1496	784	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	26
PID 784 wrote to memory of 1496	784	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	26
PID 784 wrote to memory of 1496	784	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	26
PID 784 wrote to memory of 1496	784	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	26
PID 784 wrote to memory of 1496	784	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	26
PID 784 wrote to memory of 1496	784	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	26
PID 1496 wrote to memory of 1532	1496	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	27
PID 1496 wrote to memory of 1532	1496	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	27
PID 1496 wrote to memory of 1532	1496	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	27
PID 1496 wrote to memory of 1532	1496	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	27
PID 1496 wrote to memory of 1532	1496	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	27
PID 1496 wrote to memory of 1532	1496	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	27
PID 1496 wrote to memory of 1532	1496	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	27
PID 1496 wrote to memory of 1532	1496	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	27
PID 1496 wrote to memory of 1532	1496	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	27
PID 1496 wrote to memory of 1532	1496	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	27
PID 1496 wrote to memory of 1532	1496	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	27
PID 1496 wrote to memory of 1532	1496	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	27
PID 1532 wrote to memory of 1468	1532	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	28
PID 1532 wrote to memory of 1468	1532	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	28
PID 1532 wrote to memory of 1468	1532	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	28
PID 1532 wrote to memory of 1468	1532	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	28
PID 1532 wrote to memory of 1468	1532	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	28
PID 1532 wrote to memory of 1468	1532	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	28
PID 1532 wrote to memory of 1020	1532	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	29
PID 1532 wrote to memory of 1020	1532	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	29
PID 1532 wrote to memory of 1020	1532	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	29
PID 1532 wrote to memory of 1020	1532	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	29
PID 1532 wrote to memory of 1020	1532	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	29
PID 1532 wrote to memory of 1020	1532	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	29
PID 1532 wrote to memory of 468	1532	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	30
PID 1532 wrote to memory of 468	1532	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	30
PID 1532 wrote to memory of 468	1532	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	30
PID 1532 wrote to memory of 468	1532	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	30
PID 1532 wrote to memory of 468	1532	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	30
PID 1532 wrote to memory of 468	1532	f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe	30

C:\Users\Admin\AppData\Local\Temp\f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe
"C:\Users\Admin\AppData\Local\Temp\f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:784
- C:\Users\Admin\AppData\Local\Temp\f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe
  "C:\Users\Admin\AppData\Local\Temp\f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1496
- - C:\Users\Admin\AppData\Local\Temp\f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe
    "C:\Users\Admin\AppData\Local\Temp\f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1532
  - - C:\Users\Admin\AppData\Local\Temp\f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe
      "C:\Users\Admin\AppData\Local\Temp\f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
      4⤵
      PID:1468
  - - C:\Users\Admin\AppData\Local\Temp\f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe
      "C:\Users\Admin\AppData\Local\Temp\f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data1.dmp
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1020
  - - C:\Users\Admin\AppData\Local\Temp\f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe
      "C:\Users\Admin\AppData\Local\Temp\f3fd9c235e6f11f911792ca6e3c3fa9fc34b197683e48e31a13b95f4ac2f5d04.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data2.dmp
      4⤵
      Accesses Microsoft Outlook accounts
      PID:468

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/468-115-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/468-100-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/468-98-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/468-105-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/468-110-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/468-113-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/468-119-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/784-63-0x00000000005E0000-0x00000000005E4000-memory.dmp

Filesize
16KB

Download
memory/784-60-0x00000000005E0000-0x00000000005E4000-memory.dmp

Filesize
16KB

Download
memory/784-57-0x0000000002590000-0x000000000261B000-memory.dmp

Filesize
556KB

Download
memory/784-62-0x00000000005E0000-0x00000000005E4000-memory.dmp

Filesize
16KB

Download
memory/784-59-0x00000000005E0000-0x00000000005E4000-memory.dmp

Filesize
16KB

Download
memory/784-56-0x00000000005E0000-0x00000000005E4000-memory.dmp

Filesize
16KB

Download
memory/784-61-0x00000000005E0000-0x00000000005E4000-memory.dmp

Filesize
16KB

Download
memory/1020-112-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1020-104-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1020-95-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1020-109-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1020-117-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1020-114-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1020-93-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1468-111-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/1468-118-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/1468-90-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/1468-116-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/1468-88-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/1496-69-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/1496-65-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/1496-121-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/1496-120-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/1496-64-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/1496-67-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/1496-106-0x0000000075FC1000-0x0000000075FC3000-memory.dmp

Filesize
8KB

Download
memory/1496-74-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/1532-102-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/1532-75-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/1532-76-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/1532-78-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/1532-79-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/1532-86-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/1532-84-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/1532-87-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/1532-80-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/1532-81-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/1532-82-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download