isrstealer | 9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b

Analysis

max time kernel
55s
max time network
41s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
11-10-2022 08:51

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General

Target

9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe
Size

666KB
MD5

47e6a34329a08e7c6111150605c40960
SHA1

22f03c2cea3322be33034ae26452e3bb897f8750
SHA256

9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b
SHA512

59454408d115c3fc4d42eb19887dd43028bd8f293fe4310d551085796f9c4ae365d9b6971e6ba0aff00a534c5c9bf93f0b4ff914af50a78c9032a32641aa3ae0
SSDEEP

12288:aA8aQm8TWw169cNSM9jDYBlH8TWw169cNSM9jDYBlq:aAUmP+vNSoYBlHP+vNSoYBlq

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 4 IoCs

resource	yara_rule
behavioral1/memory/940-61-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/940-60-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/940-75-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/940-85-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/1536-83-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/1536-84-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral1/memory/1536-83-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/1536-84-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1704-68-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1704-72-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1704-73-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1704-74-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1704-76-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1536-78-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1536-82-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1536-83-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1536-84-0x0000000000400000-0x000000000041F000-memory.dmp	upx

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	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 784 set thread context of 940	784	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	27
PID 940 set thread context of 1704	940	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	29
PID 940 set thread context of 1536	940	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.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 1 IoCs

pid	Process
784	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	784	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
940	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe

Suspicious use of WriteProcessMemory 31 IoCs

description	pid	Process	procid_target
PID 784 wrote to memory of 1268	784	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	26
PID 784 wrote to memory of 1268	784	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	26
PID 784 wrote to memory of 1268	784	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	26
PID 784 wrote to memory of 1268	784	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	26
PID 784 wrote to memory of 940	784	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	27
PID 784 wrote to memory of 940	784	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	27
PID 784 wrote to memory of 940	784	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	27
PID 784 wrote to memory of 940	784	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	27
PID 784 wrote to memory of 940	784	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	27
PID 784 wrote to memory of 940	784	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	27
PID 784 wrote to memory of 940	784	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	27
PID 784 wrote to memory of 940	784	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	27
PID 784 wrote to memory of 940	784	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	27
PID 940 wrote to memory of 1704	940	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	29
PID 940 wrote to memory of 1704	940	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	29
PID 940 wrote to memory of 1704	940	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	29
PID 940 wrote to memory of 1704	940	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	29
PID 940 wrote to memory of 1704	940	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	29
PID 940 wrote to memory of 1704	940	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	29
PID 940 wrote to memory of 1704	940	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	29
PID 940 wrote to memory of 1704	940	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	29
PID 940 wrote to memory of 1704	940	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	29
PID 940 wrote to memory of 1536	940	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	30
PID 940 wrote to memory of 1536	940	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	30
PID 940 wrote to memory of 1536	940	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	30
PID 940 wrote to memory of 1536	940	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	30
PID 940 wrote to memory of 1536	940	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	30
PID 940 wrote to memory of 1536	940	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	30
PID 940 wrote to memory of 1536	940	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	30
PID 940 wrote to memory of 1536	940	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	30
PID 940 wrote to memory of 1536	940	9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe	30

C:\Users\Admin\AppData\Local\Temp\9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe
"C:\Users\Admin\AppData\Local\Temp\9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:784
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\cc.vbs"
  2⤵
  PID:1268
- C:\Users\Admin\AppData\Local\Temp\9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe
  C:\Users\Admin\AppData\Local\Temp\9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:940
- - C:\Users\Admin\AppData\Local\Temp\9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\YXOwgCYCpE.ini"
    3⤵
    PID:1704
- - C:\Users\Admin\AppData\Local\Temp\9c3c1faa29b96b6e6841a7c8699c06b3474ddbbd2f29dac518455eca19aaeb2b.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\uMy62lgWP0.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:1536

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\YXOwgCYCpE.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
C:\Users\Admin\AppData\Local\Temp\cc.vbs

Filesize
377B

MD5
f5ec4fc2583140af38d881b70f9f04c3

SHA1
b559eb4886d7964cb06aa98da909af2ac33080ba

SHA256
ac0d8a6cc319a857d66b734232f8a02888f093b2994c972f64c4f743d078cfe6

SHA512
076d81bf7af57e8871682e4d59d3d5348b4c552671335e86a39e485d2a4b1cd3138aada8d4dbeb2fccbe612d49797f30bf0a70ee298d62ab83ed64fa107f6f5e

Download Submit
memory/784-67-0x0000000000C76000-0x0000000000C87000-memory.dmp

Filesize
68KB

Download
memory/784-66-0x0000000074200000-0x00000000747AB000-memory.dmp

Filesize
5.7MB

Download
memory/784-56-0x0000000074200000-0x00000000747AB000-memory.dmp

Filesize
5.7MB

Download
memory/784-55-0x0000000074200000-0x00000000747AB000-memory.dmp

Filesize
5.7MB

Download
memory/784-54-0x0000000075FC1000-0x0000000075FC3000-memory.dmp

Filesize
8KB

Download
memory/940-85-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/940-60-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/940-75-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1536-78-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1536-84-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1536-83-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1536-82-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1704-68-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1704-76-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1704-74-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1704-73-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1704-72-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download