isrstealer | cc94e513464e869cef5da4aa050de54fd8afaa879ea1ba545ac0a9a83e630a8c

Analysis

max time kernel
120s
max time network
123s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
26/02/2025, 00:57 UTC

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General

Target

JaffaCakes118_235138719883429e805b3fd05310326a.exe
Size

329KB
MD5

235138719883429e805b3fd05310326a
SHA1

341de6cf3a38d8fe9cf1a1f3896d8741a83bf1ff
SHA256

cc94e513464e869cef5da4aa050de54fd8afaa879ea1ba545ac0a9a83e630a8c
SHA512

79925b81fab713cffd9e9609f4b7737f1d7b27e9240d8d788483e223b5b20d8b9837c1737708f702b4830b3dc06055aa25d24026b0cdf7197459af9fdd2baaa3
SSDEEP

6144:K4eZA+tMPSkR8Zbd+z6oxVr/d6bVdNKfiH/Og++H6oMdMYTyalG4:K4eZA+tMPSxZbd46GlmTOg++HKKYl

Score

10^/10

isrstealer collection discovery 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 8 IoCs

resource	yara_rule
behavioral1/memory/1960-22-0x0000000000400000-0x0000000000449000-memory.dmp	family_isrstealer
behavioral1/memory/2456-21-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/2456-16-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1960-10-0x0000000000400000-0x0000000000449000-memory.dmp	family_isrstealer
behavioral1/memory/1960-11-0x0000000000400000-0x0000000000449000-memory.dmp	family_isrstealer
behavioral1/memory/1960-8-0x0000000000400000-0x0000000000449000-memory.dmp	family_isrstealer
behavioral1/memory/2456-31-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/2456-32-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer

Detected Nirsoft tools 2 IoCs

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

resource	yara_rule
behavioral1/memory/2636-30-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/2636-33-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/2636-30-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/2636-33-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	JaffaCakes118_235138719883429e805b3fd05310326a.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 1128 set thread context of 1960	1128	JaffaCakes118_235138719883429e805b3fd05310326a.exe	31
PID 1960 set thread context of 2456	1960	JaffaCakes118_235138719883429e805b3fd05310326a.exe	32
PID 2456 set thread context of 2392	2456	JaffaCakes118_235138719883429e805b3fd05310326a.exe	33
PID 2456 set thread context of 2636	2456	JaffaCakes118_235138719883429e805b3fd05310326a.exe	34

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2636-28-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/2636-30-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/2636-29-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/2636-26-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/2636-33-0x0000000000400000-0x000000000041F000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_235138719883429e805b3fd05310326a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_235138719883429e805b3fd05310326a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_235138719883429e805b3fd05310326a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_235138719883429e805b3fd05310326a.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2456	JaffaCakes118_235138719883429e805b3fd05310326a.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 1128 wrote to memory of 1960	1128	JaffaCakes118_235138719883429e805b3fd05310326a.exe	31
PID 1128 wrote to memory of 1960	1128	JaffaCakes118_235138719883429e805b3fd05310326a.exe	31
PID 1128 wrote to memory of 1960	1128	JaffaCakes118_235138719883429e805b3fd05310326a.exe	31
PID 1128 wrote to memory of 1960	1128	JaffaCakes118_235138719883429e805b3fd05310326a.exe	31
PID 1128 wrote to memory of 1960	1128	JaffaCakes118_235138719883429e805b3fd05310326a.exe	31
PID 1128 wrote to memory of 1960	1128	JaffaCakes118_235138719883429e805b3fd05310326a.exe	31
PID 1128 wrote to memory of 1960	1128	JaffaCakes118_235138719883429e805b3fd05310326a.exe	31
PID 1128 wrote to memory of 1960	1128	JaffaCakes118_235138719883429e805b3fd05310326a.exe	31
PID 1128 wrote to memory of 1960	1128	JaffaCakes118_235138719883429e805b3fd05310326a.exe	31
PID 1128 wrote to memory of 1960	1128	JaffaCakes118_235138719883429e805b3fd05310326a.exe	31
PID 1128 wrote to memory of 1960	1128	JaffaCakes118_235138719883429e805b3fd05310326a.exe	31
PID 1960 wrote to memory of 2456	1960	JaffaCakes118_235138719883429e805b3fd05310326a.exe	32
PID 1960 wrote to memory of 2456	1960	JaffaCakes118_235138719883429e805b3fd05310326a.exe	32
PID 1960 wrote to memory of 2456	1960	JaffaCakes118_235138719883429e805b3fd05310326a.exe	32
PID 1960 wrote to memory of 2456	1960	JaffaCakes118_235138719883429e805b3fd05310326a.exe	32
PID 1960 wrote to memory of 2456	1960	JaffaCakes118_235138719883429e805b3fd05310326a.exe	32
PID 1960 wrote to memory of 2456	1960	JaffaCakes118_235138719883429e805b3fd05310326a.exe	32
PID 1960 wrote to memory of 2456	1960	JaffaCakes118_235138719883429e805b3fd05310326a.exe	32
PID 1960 wrote to memory of 2456	1960	JaffaCakes118_235138719883429e805b3fd05310326a.exe	32
PID 2456 wrote to memory of 2392	2456	JaffaCakes118_235138719883429e805b3fd05310326a.exe	33
PID 2456 wrote to memory of 2392	2456	JaffaCakes118_235138719883429e805b3fd05310326a.exe	33
PID 2456 wrote to memory of 2392	2456	JaffaCakes118_235138719883429e805b3fd05310326a.exe	33
PID 2456 wrote to memory of 2392	2456	JaffaCakes118_235138719883429e805b3fd05310326a.exe	33
PID 2456 wrote to memory of 2392	2456	JaffaCakes118_235138719883429e805b3fd05310326a.exe	33
PID 2456 wrote to memory of 2392	2456	JaffaCakes118_235138719883429e805b3fd05310326a.exe	33
PID 2456 wrote to memory of 2392	2456	JaffaCakes118_235138719883429e805b3fd05310326a.exe	33
PID 2456 wrote to memory of 2392	2456	JaffaCakes118_235138719883429e805b3fd05310326a.exe	33
PID 2456 wrote to memory of 2392	2456	JaffaCakes118_235138719883429e805b3fd05310326a.exe	33
PID 2456 wrote to memory of 2636	2456	JaffaCakes118_235138719883429e805b3fd05310326a.exe	34
PID 2456 wrote to memory of 2636	2456	JaffaCakes118_235138719883429e805b3fd05310326a.exe	34
PID 2456 wrote to memory of 2636	2456	JaffaCakes118_235138719883429e805b3fd05310326a.exe	34
PID 2456 wrote to memory of 2636	2456	JaffaCakes118_235138719883429e805b3fd05310326a.exe	34
PID 2456 wrote to memory of 2636	2456	JaffaCakes118_235138719883429e805b3fd05310326a.exe	34
PID 2456 wrote to memory of 2636	2456	JaffaCakes118_235138719883429e805b3fd05310326a.exe	34
PID 2456 wrote to memory of 2636	2456	JaffaCakes118_235138719883429e805b3fd05310326a.exe	34
PID 2456 wrote to memory of 2636	2456	JaffaCakes118_235138719883429e805b3fd05310326a.exe	34
PID 2456 wrote to memory of 2636	2456	JaffaCakes118_235138719883429e805b3fd05310326a.exe	34

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_235138719883429e805b3fd05310326a.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_235138719883429e805b3fd05310326a.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1128
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_235138719883429e805b3fd05310326a.exe
  "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_235138719883429e805b3fd05310326a.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1960
- - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_235138719883429e805b3fd05310326a.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_235138719883429e805b3fd05310326a.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2456
  - - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_235138719883429e805b3fd05310326a.exe
      /scomma "C:\Users\Admin\AppData\Local\Temp\AUCWqzMLo5.ini"
      4⤵
      PID:2392
  - - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_235138719883429e805b3fd05310326a.exe
      /scomma "C:\Users\Admin\AppData\Local\Temp\egL30Q0drE.ini"
      4⤵
      Accesses Microsoft Outlook accounts
      System Location Discovery: System Language Discovery
      PID:2636

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1960-4-0x0000000000400000-0x0000000000449000-memory.dmp

Filesize
292KB

Download
memory/1960-3-0x0000000000400000-0x0000000000449000-memory.dmp

Filesize
292KB

Download
memory/1960-0-0x0000000000400000-0x0000000000449000-memory.dmp

Filesize
292KB

Download
memory/1960-2-0x0000000000400000-0x0000000000449000-memory.dmp

Filesize
292KB

Download
memory/1960-5-0x0000000000400000-0x0000000000449000-memory.dmp

Filesize
292KB

Download
memory/1960-10-0x0000000000400000-0x0000000000449000-memory.dmp

Filesize
292KB

Download
memory/1960-11-0x0000000000400000-0x0000000000449000-memory.dmp

Filesize
292KB

Download
memory/1960-8-0x0000000000400000-0x0000000000449000-memory.dmp

Filesize
292KB

Download
memory/1960-6-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1960-1-0x0000000000400000-0x0000000000449000-memory.dmp

Filesize
292KB

Download
memory/1960-22-0x0000000000400000-0x0000000000449000-memory.dmp

Filesize
292KB

Download
memory/2456-21-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2456-12-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2456-14-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2456-16-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2456-31-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2456-32-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2636-28-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2636-30-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2636-29-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2636-26-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2636-33-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download