isrstealer | 5adf2984baa91b53d1c812a86de9ff547770fbdcf24c37655a5c1419b2f90fa7

General

Target

5adf2984baa91b53d1c812a86de9ff547770fbdcf24c37655a5c1419b2f90fa7.exe
Size

1008KB
MD5

c8b0180a2c70e715a0dadaa90973543a
SHA1

a80187865a735580ceddb0f0d8dee79be10206ae
SHA256

5adf2984baa91b53d1c812a86de9ff547770fbdcf24c37655a5c1419b2f90fa7
SHA512

14d6592830722e0be9bbf5f8395a1effc1fa64d68b97a71e149e588f0c16fef4a9f141fe34c3e61cdf9c1f172b189f76a8c06566001ff35c929adade7dc4fb8d
SSDEEP

24576:gW6clRhnJG7oxHLqNcqjgAxl/Ze05uP2rQhv9jZFBbXfJ/:gW6GRFc7oxmNLjgAX/ZTDunFBbB

Score

10^/10

isrstealer 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
behavioral1/memory/1892-60-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1892-62-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1892-63-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/1892-73-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1892-79-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/944-67-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/944-71-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/944-74-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/944-75-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/944-76-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/944-77-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2040 set thread context of 1892	2040	5adf2984baa91b53d1c812a86de9ff547770fbdcf24c37655a5c1419b2f90fa7.exe	27
PID 1892 set thread context of 944	1892	vbc.exe	28

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1772	1892	WerFault.exe	27

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2040	5adf2984baa91b53d1c812a86de9ff547770fbdcf24c37655a5c1419b2f90fa7.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1892	vbc.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2040 wrote to memory of 1892	2040	5adf2984baa91b53d1c812a86de9ff547770fbdcf24c37655a5c1419b2f90fa7.exe	27
PID 2040 wrote to memory of 1892	2040	5adf2984baa91b53d1c812a86de9ff547770fbdcf24c37655a5c1419b2f90fa7.exe	27
PID 2040 wrote to memory of 1892	2040	5adf2984baa91b53d1c812a86de9ff547770fbdcf24c37655a5c1419b2f90fa7.exe	27
PID 2040 wrote to memory of 1892	2040	5adf2984baa91b53d1c812a86de9ff547770fbdcf24c37655a5c1419b2f90fa7.exe	27
PID 2040 wrote to memory of 1892	2040	5adf2984baa91b53d1c812a86de9ff547770fbdcf24c37655a5c1419b2f90fa7.exe	27
PID 2040 wrote to memory of 1892	2040	5adf2984baa91b53d1c812a86de9ff547770fbdcf24c37655a5c1419b2f90fa7.exe	27
PID 2040 wrote to memory of 1892	2040	5adf2984baa91b53d1c812a86de9ff547770fbdcf24c37655a5c1419b2f90fa7.exe	27
PID 2040 wrote to memory of 1892	2040	5adf2984baa91b53d1c812a86de9ff547770fbdcf24c37655a5c1419b2f90fa7.exe	27
PID 1892 wrote to memory of 944	1892	vbc.exe	28
PID 1892 wrote to memory of 944	1892	vbc.exe	28
PID 1892 wrote to memory of 944	1892	vbc.exe	28
PID 1892 wrote to memory of 944	1892	vbc.exe	28
PID 1892 wrote to memory of 944	1892	vbc.exe	28
PID 1892 wrote to memory of 944	1892	vbc.exe	28
PID 1892 wrote to memory of 944	1892	vbc.exe	28
PID 1892 wrote to memory of 944	1892	vbc.exe	28
PID 1892 wrote to memory of 944	1892	vbc.exe	28
PID 1892 wrote to memory of 1772	1892	vbc.exe	29
PID 1892 wrote to memory of 1772	1892	vbc.exe	29
PID 1892 wrote to memory of 1772	1892	vbc.exe	29
PID 1892 wrote to memory of 1772	1892	vbc.exe	29

C:\Users\Admin\AppData\Local\Temp\5adf2984baa91b53d1c812a86de9ff547770fbdcf24c37655a5c1419b2f90fa7.exe
"C:\Users\Admin\AppData\Local\Temp\5adf2984baa91b53d1c812a86de9ff547770fbdcf24c37655a5c1419b2f90fa7.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2040
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1892
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\c6RXe3jQto.ini"
    3⤵
    PID:944
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1892 -s 288
    3⤵
    - Program crash
    PID:1772

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scripting

1

T1064

Persistence

Privilege Escalation

Defense Evasion

Scripting

1

T1064

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/944-77-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/944-76-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/944-75-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/944-74-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/944-71-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/944-67-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1892-73-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1892-62-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1892-60-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1892-58-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1892-57-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1892-79-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2040-68-0x0000000074460000-0x0000000074A0B000-memory.dmp

Filesize
5.7MB

Download
memory/2040-54-0x00000000762D1000-0x00000000762D3000-memory.dmp

Filesize
8KB

Download
memory/2040-56-0x0000000074460000-0x0000000074A0B000-memory.dmp

Filesize
5.7MB

Download
memory/2040-55-0x0000000074460000-0x0000000074A0B000-memory.dmp

Filesize
5.7MB

Download

Analysis

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