isrstealer | 55aeebc9742efe7d64d02f824509e87b5e1b169962b82763ec39e3b394e478ff

General

Target

55aeebc9742efe7d64d02f824509e87b5e1b169962b82763ec39e3b394e478ff.exe
Size

396KB
MD5

73f6d672ab0cf264f6aba402152afec5
SHA1

07bee1c16140e960c5573cc71a88d1f08c43f0e5
SHA256

55aeebc9742efe7d64d02f824509e87b5e1b169962b82763ec39e3b394e478ff
SHA512

2876f7c3f1fe6cc5142898c6a5ef46681714691e321b2634611e573393a487f6b87ae405ea3d50e5380379bf0c85f92a73367b8d22284710070d38df7c08ada9
SSDEEP

12288:ap0jU2afGejIcW/jySiW7M/XyInrNoxr+hgsIGg:wjLeudISoxle

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 4 IoCs

resource	yara_rule
behavioral1/memory/1752-56-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/1752-57-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/1752-67-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/1752-71-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/308-62-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/308-66-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/308-69-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/308-70-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/308-72-0x0000000000400000-0x0000000000453000-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 1676 set thread context of 1752	1676	55aeebc9742efe7d64d02f824509e87b5e1b169962b82763ec39e3b394e478ff.exe	28
PID 1752 set thread context of 308	1752	vbc.exe	29

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1752	vbc.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1676 wrote to memory of 1752	1676	55aeebc9742efe7d64d02f824509e87b5e1b169962b82763ec39e3b394e478ff.exe	28
PID 1676 wrote to memory of 1752	1676	55aeebc9742efe7d64d02f824509e87b5e1b169962b82763ec39e3b394e478ff.exe	28
PID 1676 wrote to memory of 1752	1676	55aeebc9742efe7d64d02f824509e87b5e1b169962b82763ec39e3b394e478ff.exe	28
PID 1676 wrote to memory of 1752	1676	55aeebc9742efe7d64d02f824509e87b5e1b169962b82763ec39e3b394e478ff.exe	28
PID 1676 wrote to memory of 1752	1676	55aeebc9742efe7d64d02f824509e87b5e1b169962b82763ec39e3b394e478ff.exe	28
PID 1676 wrote to memory of 1752	1676	55aeebc9742efe7d64d02f824509e87b5e1b169962b82763ec39e3b394e478ff.exe	28
PID 1676 wrote to memory of 1752	1676	55aeebc9742efe7d64d02f824509e87b5e1b169962b82763ec39e3b394e478ff.exe	28
PID 1676 wrote to memory of 1752	1676	55aeebc9742efe7d64d02f824509e87b5e1b169962b82763ec39e3b394e478ff.exe	28
PID 1676 wrote to memory of 1752	1676	55aeebc9742efe7d64d02f824509e87b5e1b169962b82763ec39e3b394e478ff.exe	28
PID 1752 wrote to memory of 308	1752	vbc.exe	29
PID 1752 wrote to memory of 308	1752	vbc.exe	29
PID 1752 wrote to memory of 308	1752	vbc.exe	29
PID 1752 wrote to memory of 308	1752	vbc.exe	29
PID 1752 wrote to memory of 308	1752	vbc.exe	29
PID 1752 wrote to memory of 308	1752	vbc.exe	29
PID 1752 wrote to memory of 308	1752	vbc.exe	29
PID 1752 wrote to memory of 308	1752	vbc.exe	29
PID 1752 wrote to memory of 308	1752	vbc.exe	29

C:\Users\Admin\AppData\Local\Temp\55aeebc9742efe7d64d02f824509e87b5e1b169962b82763ec39e3b394e478ff.exe
"C:\Users\Admin\AppData\Local\Temp\55aeebc9742efe7d64d02f824509e87b5e1b169962b82763ec39e3b394e478ff.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1676
- 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:1752
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\4ijEqhDpDI.ini"
    3⤵
    PID:308

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/308-69-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/308-62-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/308-66-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/308-70-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/308-72-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1676-55-0x00000000742E0000-0x000000007488B000-memory.dmp

Filesize
5.7MB

Download
memory/1676-59-0x00000000742E0000-0x000000007488B000-memory.dmp

Filesize
5.7MB

Download
memory/1676-54-0x0000000075C81000-0x0000000075C83000-memory.dmp

Filesize
8KB

Download
memory/1752-56-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1752-67-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1752-71-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download

Analysis

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