isrstealer | cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f

General

Target

cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe
Size

351KB
MD5

5f94e0e184d6bd6fcf78fc180d31f2b4
SHA1

91ee2ea48262f151d711533f04b21d8e3d1447d2
SHA256

cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f
SHA512

299700b4c89c682cd806bf23f1ed11646518f0a8d5de354bf743d66c4b86a2456fa109c9fff90accdb90890fdd4467f4e2c93fcba4c248ef6cf232679bbcc4e5
SSDEEP

6144:j0HhrcbsYJOZpgg5XhMFBMXmXdiH8ZeW2Snzl+QYpAuWV8c:jGhQbshZ1rJmS8QWZRYpAT2c

Score

10^/10

isrstealer collection 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 5 IoCs

resource	yara_rule
behavioral2/memory/3472-135-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/3472-137-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/3472-143-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/3472-150-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/3472-151-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/112-148-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/112-149-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral2/memory/112-148-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/112-149-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/112-145-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/112-147-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/112-148-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/112-149-0x0000000000400000-0x000000000041F000-memory.dmp	upx

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2432 set thread context of 3472	2432	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	82
PID 3472 set thread context of 1468	3472	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	83
PID 3472 set thread context of 112	3472	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	89

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4316	1468	WerFault.exe	83
2172	1468	WerFault.exe	83

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2432	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3472	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2432 wrote to memory of 3472	2432	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	82
PID 2432 wrote to memory of 3472	2432	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	82
PID 2432 wrote to memory of 3472	2432	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	82
PID 2432 wrote to memory of 3472	2432	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	82
PID 2432 wrote to memory of 3472	2432	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	82
PID 2432 wrote to memory of 3472	2432	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	82
PID 2432 wrote to memory of 3472	2432	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	82
PID 3472 wrote to memory of 1468	3472	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	83
PID 3472 wrote to memory of 1468	3472	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	83
PID 3472 wrote to memory of 1468	3472	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	83
PID 3472 wrote to memory of 1468	3472	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	83
PID 3472 wrote to memory of 1468	3472	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	83
PID 3472 wrote to memory of 1468	3472	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	83
PID 3472 wrote to memory of 1468	3472	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	83
PID 3472 wrote to memory of 1468	3472	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	83
PID 3472 wrote to memory of 112	3472	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	89
PID 3472 wrote to memory of 112	3472	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	89
PID 3472 wrote to memory of 112	3472	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	89
PID 3472 wrote to memory of 112	3472	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	89
PID 3472 wrote to memory of 112	3472	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	89
PID 3472 wrote to memory of 112	3472	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	89
PID 3472 wrote to memory of 112	3472	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	89
PID 3472 wrote to memory of 112	3472	cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe	89

C:\Users\Admin\AppData\Local\Temp\cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe
"C:\Users\Admin\AppData\Local\Temp\cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2432
- C:\Users\Admin\AppData\Local\Temp\cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe
  "C:\Users\Admin\AppData\Local\Temp\cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3472
- - C:\Users\Admin\AppData\Local\Temp\cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\qyHfJr3MOJ.ini"
    3⤵
    PID:1468
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1468 -s 88
      4⤵
      Program crash
      PID:4316
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1468 -s 96
      4⤵
      Program crash
      PID:2172
- - C:\Users\Admin\AppData\Local\Temp\cfc00332745c24977e756b20630928a2f83d00fa233c8fcde2ebe7607908116f.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\LN0qL7fPJb.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:112

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1468 -ip 1468
1⤵
PID:4016

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 1468 -ip 1468
1⤵
PID:1520

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/112-149-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/112-148-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/112-147-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/112-145-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2432-132-0x0000000075340000-0x00000000758F1000-memory.dmp

Filesize
5.7MB

Download
memory/2432-140-0x0000000075340000-0x00000000758F1000-memory.dmp

Filesize
5.7MB

Download
memory/2432-133-0x0000000075340000-0x00000000758F1000-memory.dmp

Filesize
5.7MB

Download
memory/3472-143-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3472-137-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3472-135-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3472-150-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3472-151-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download

Analysis

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