isrstealer | 6930565571319c8692dca27ee5b1747d6fb891dd14ec8c01a1c5cc068aaa6220

General

Target

563ccd2ff2ab1fe69c12e4606dcf1b6a_JaffaCakes118.exe
Size

422KB
MD5

563ccd2ff2ab1fe69c12e4606dcf1b6a
SHA1

d15eba60941acd02fc457336f1f23f87bb4494ff
SHA256

6930565571319c8692dca27ee5b1747d6fb891dd14ec8c01a1c5cc068aaa6220
SHA512

0107a5e132ce10d96228dfbade60726000141e51debc016292fae298ce5ebdfbc44890c5b21cd9c601fee71a895caca4f14ef4698f39e869d48851e961186e2d
SSDEEP

12288:gxHGypkpBqjrXKSybKdnDuUfctvDNOv+129H:gxdplhnqUSDt129

Score

10^/10

isrstealer stealer trojan

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

Processes:

resource	yara_rule
behavioral1/memory/2408-11-0x0000000000400000-0x0000000000451000-memory.dmp	family_isrstealer
behavioral1/memory/2408-15-0x0000000000400000-0x0000000000451000-memory.dmp	family_isrstealer
behavioral1/memory/2408-7-0x0000000000400000-0x0000000000451000-memory.dmp	family_isrstealer
behavioral1/memory/2408-49-0x0000000000400000-0x0000000000451000-memory.dmp	family_isrstealer

Detected Nirsoft tools 4 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

Processes:

resource	yara_rule
behavioral1/memory/2736-46-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral1/memory/2736-42-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral1/memory/2736-47-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral1/memory/2736-53-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft

NirSoft WebBrowserPassView 4 IoCs

Password recovery tool for various web browsers

Processes:

resource	yara_rule
behavioral1/memory/2736-46-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral1/memory/2736-42-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral1/memory/2736-47-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral1/memory/2736-53-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Suspicious use of SetThreadContext 3 IoCs

Processes:

563ccd2ff2ab1fe69c12e4606dcf1b6a_JaffaCakes118.exevbc.exevbc.exe

description	pid	process	target process
PID 2444 set thread context of 2408	2444	563ccd2ff2ab1fe69c12e4606dcf1b6a_JaffaCakes118.exe	vbc.exe
PID 2408 set thread context of 1872	2408	vbc.exe	vbc.exe
PID 1872 set thread context of 2736	1872	vbc.exe	vbc.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

vbc.exe

pid process

2408 vbc.exe
2408 vbc.exe
2408 vbc.exe
2408 vbc.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

vbc.exe

pid process

2408 vbc.exe

pid	process
2408	vbc.exe
2408	vbc.exe
2408	vbc.exe
2408	vbc.exe

pid	process
2408	vbc.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

563ccd2ff2ab1fe69c12e4606dcf1b6a_JaffaCakes118.exevbc.exevbc.exe

description	pid	process	target process
PID 2444 wrote to memory of 2408	2444	563ccd2ff2ab1fe69c12e4606dcf1b6a_JaffaCakes118.exe	vbc.exe
PID 2444 wrote to memory of 2408	2444	563ccd2ff2ab1fe69c12e4606dcf1b6a_JaffaCakes118.exe	vbc.exe
PID 2444 wrote to memory of 2408	2444	563ccd2ff2ab1fe69c12e4606dcf1b6a_JaffaCakes118.exe	vbc.exe
PID 2444 wrote to memory of 2408	2444	563ccd2ff2ab1fe69c12e4606dcf1b6a_JaffaCakes118.exe	vbc.exe
PID 2444 wrote to memory of 2408	2444	563ccd2ff2ab1fe69c12e4606dcf1b6a_JaffaCakes118.exe	vbc.exe
PID 2444 wrote to memory of 2408	2444	563ccd2ff2ab1fe69c12e4606dcf1b6a_JaffaCakes118.exe	vbc.exe
PID 2444 wrote to memory of 2408	2444	563ccd2ff2ab1fe69c12e4606dcf1b6a_JaffaCakes118.exe	vbc.exe
PID 2444 wrote to memory of 2408	2444	563ccd2ff2ab1fe69c12e4606dcf1b6a_JaffaCakes118.exe	vbc.exe
PID 2408 wrote to memory of 1872	2408	vbc.exe	vbc.exe
PID 2408 wrote to memory of 1872	2408	vbc.exe	vbc.exe
PID 2408 wrote to memory of 1872	2408	vbc.exe	vbc.exe
PID 2408 wrote to memory of 1872	2408	vbc.exe	vbc.exe
PID 2408 wrote to memory of 1872	2408	vbc.exe	vbc.exe
PID 2408 wrote to memory of 1872	2408	vbc.exe	vbc.exe
PID 2408 wrote to memory of 1872	2408	vbc.exe	vbc.exe
PID 2408 wrote to memory of 1872	2408	vbc.exe	vbc.exe
PID 2408 wrote to memory of 1872	2408	vbc.exe	vbc.exe
PID 2408 wrote to memory of 1872	2408	vbc.exe	vbc.exe
PID 2408 wrote to memory of 1872	2408	vbc.exe	vbc.exe
PID 2408 wrote to memory of 1872	2408	vbc.exe	vbc.exe
PID 1872 wrote to memory of 2736	1872	vbc.exe	vbc.exe
PID 1872 wrote to memory of 2736	1872	vbc.exe	vbc.exe
PID 1872 wrote to memory of 2736	1872	vbc.exe	vbc.exe
PID 1872 wrote to memory of 2736	1872	vbc.exe	vbc.exe
PID 1872 wrote to memory of 2736	1872	vbc.exe	vbc.exe
PID 1872 wrote to memory of 2736	1872	vbc.exe	vbc.exe

C:\Users\Admin\AppData\Local\Temp\563ccd2ff2ab1fe69c12e4606dcf1b6a_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\563ccd2ff2ab1fe69c12e4606dcf1b6a_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2444
- 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 behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2408
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1872
  - - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
      "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
      4⤵
      PID:2736

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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/1872-44-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/1872-18-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/1872-20-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/1872-22-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/1872-24-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/1872-26-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/1872-28-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/1872-30-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/1872-34-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/1872-35-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/1872-36-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/1872-37-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/2408-15-0x0000000000400000-0x0000000000451000-memory.dmp

Filesize
324KB

Download
memory/2408-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2408-48-0x0000000000460000-0x00000000004C7000-memory.dmp

Filesize
412KB

Download
memory/2408-49-0x0000000000400000-0x0000000000451000-memory.dmp

Filesize
324KB

Download
memory/2408-5-0x0000000000400000-0x0000000000451000-memory.dmp

Filesize
324KB

Download
memory/2408-7-0x0000000000400000-0x0000000000451000-memory.dmp

Filesize
324KB

Download
memory/2408-3-0x0000000000400000-0x0000000000451000-memory.dmp

Filesize
324KB

Download
memory/2408-11-0x0000000000400000-0x0000000000451000-memory.dmp

Filesize
324KB

Download
memory/2444-14-0x0000000074900000-0x0000000074EAB000-memory.dmp

Filesize
5.7MB

Download
memory/2444-0-0x0000000074901000-0x0000000074902000-memory.dmp

Filesize
4KB

Download
memory/2444-2-0x0000000074900000-0x0000000074EAB000-memory.dmp

Filesize
5.7MB

Download
memory/2444-1-0x0000000074900000-0x0000000074EAB000-memory.dmp

Filesize
5.7MB

Download
memory/2736-42-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/2736-47-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/2736-46-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/2736-38-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/2736-53-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads