isrstealer | f842d68c4fc549af6ee798769fc0e2eaf3f50f2207d7aadd86b11c1826ef31d6

Analysis

max time kernel
141s
max time network
121s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
12-10-2024 14:46

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General

Target

3a965754e28255e17381331c733a5062_JaffaCakes118.exe
Size

740KB
MD5

3a965754e28255e17381331c733a5062
SHA1

e33bf2c153528e3ee8a5e5b868062b1b8b455987
SHA256

f842d68c4fc549af6ee798769fc0e2eaf3f50f2207d7aadd86b11c1826ef31d6
SHA512

ec8e7a3670ed21fc6892ca50268f2e343c7eaa6cc33852753c4924e40b1d1bb69a2657732da12f30ac859535b6696b5c3925636fbc6389257eb478179fd3f98f
SSDEEP

6144:K7DUbXf3vrcaqKahsEmtkjIjc2x7bxFVApzL2HcihJ+zzaSfAI0Th5mB/WXPD5Qm:K7gbXf3vriQ7lbypPA9h4XaSfhVo6fv

Score

10^/10

isrstealer collection discovery spyware 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/1284-318-0x0000000000400000-0x0000000000449000-memory.dmp	family_isrstealer
behavioral1/files/0x0007000000018742-331.dat	family_isrstealer
behavioral1/memory/1284-356-0x0000000000400000-0x0000000000449000-memory.dmp	family_isrstealer
behavioral1/memory/1284-374-0x0000000000400000-0x0000000000449000-memory.dmp	family_isrstealer

Detected Nirsoft tools 1 IoCs

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

resource	yara_rule
behavioral1/memory/2900-371-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/2900-371-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Executes dropped EXE 3 IoCs

pid	Process
2992	LFPKG.exe
2476	LFPKG.exe
2900	LFPKG.exe

Loads dropped DLL 8 IoCs

pid	Process
912	3a965754e28255e17381331c733a5062_JaffaCakes118.exe
1284	3a965754e28255e17381331c733a5062_JaffaCakes118.exe
1284	3a965754e28255e17381331c733a5062_JaffaCakes118.exe
1284	3a965754e28255e17381331c733a5062_JaffaCakes118.exe
1284	3a965754e28255e17381331c733a5062_JaffaCakes118.exe
1284	3a965754e28255e17381331c733a5062_JaffaCakes118.exe
2992	LFPKG.exe
2992	LFPKG.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	LFPKG.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2076 set thread context of 1284	2076	3a965754e28255e17381331c733a5062_JaffaCakes118.exe	30
PID 2076 set thread context of 912	2076	3a965754e28255e17381331c733a5062_JaffaCakes118.exe	31
PID 2992 set thread context of 2476	2992	LFPKG.exe	33
PID 2992 set thread context of 2900	2992	LFPKG.exe	36

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1284-318-0x0000000000400000-0x0000000000449000-memory.dmp	upx
behavioral1/memory/2476-348-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2476-354-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1284-356-0x0000000000400000-0x0000000000449000-memory.dmp	upx
behavioral1/memory/2900-366-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/2900-371-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1284-374-0x0000000000400000-0x0000000000449000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 6 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	3a965754e28255e17381331c733a5062_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	LFPKG.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	LFPKG.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	LFPKG.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3a965754e28255e17381331c733a5062_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3a965754e28255e17381331c733a5062_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2076	3a965754e28255e17381331c733a5062_JaffaCakes118.exe
1284	3a965754e28255e17381331c733a5062_JaffaCakes118.exe
2992	LFPKG.exe

Suspicious use of WriteProcessMemory 41 IoCs

description	pid	Process	procid_target
PID 2076 wrote to memory of 1284	2076	3a965754e28255e17381331c733a5062_JaffaCakes118.exe	30
PID 2076 wrote to memory of 1284	2076	3a965754e28255e17381331c733a5062_JaffaCakes118.exe	30
PID 2076 wrote to memory of 1284	2076	3a965754e28255e17381331c733a5062_JaffaCakes118.exe	30
PID 2076 wrote to memory of 1284	2076	3a965754e28255e17381331c733a5062_JaffaCakes118.exe	30
PID 2076 wrote to memory of 1284	2076	3a965754e28255e17381331c733a5062_JaffaCakes118.exe	30
PID 2076 wrote to memory of 1284	2076	3a965754e28255e17381331c733a5062_JaffaCakes118.exe	30
PID 2076 wrote to memory of 1284	2076	3a965754e28255e17381331c733a5062_JaffaCakes118.exe	30
PID 2076 wrote to memory of 1284	2076	3a965754e28255e17381331c733a5062_JaffaCakes118.exe	30
PID 2076 wrote to memory of 912	2076	3a965754e28255e17381331c733a5062_JaffaCakes118.exe	31
PID 2076 wrote to memory of 912	2076	3a965754e28255e17381331c733a5062_JaffaCakes118.exe	31
PID 2076 wrote to memory of 912	2076	3a965754e28255e17381331c733a5062_JaffaCakes118.exe	31
PID 2076 wrote to memory of 912	2076	3a965754e28255e17381331c733a5062_JaffaCakes118.exe	31
PID 2076 wrote to memory of 912	2076	3a965754e28255e17381331c733a5062_JaffaCakes118.exe	31
PID 2076 wrote to memory of 912	2076	3a965754e28255e17381331c733a5062_JaffaCakes118.exe	31
PID 2076 wrote to memory of 912	2076	3a965754e28255e17381331c733a5062_JaffaCakes118.exe	31
PID 2076 wrote to memory of 912	2076	3a965754e28255e17381331c733a5062_JaffaCakes118.exe	31
PID 2076 wrote to memory of 912	2076	3a965754e28255e17381331c733a5062_JaffaCakes118.exe	31
PID 2076 wrote to memory of 912	2076	3a965754e28255e17381331c733a5062_JaffaCakes118.exe	31
PID 2076 wrote to memory of 912	2076	3a965754e28255e17381331c733a5062_JaffaCakes118.exe	31
PID 1284 wrote to memory of 2992	1284	3a965754e28255e17381331c733a5062_JaffaCakes118.exe	32
PID 1284 wrote to memory of 2992	1284	3a965754e28255e17381331c733a5062_JaffaCakes118.exe	32
PID 1284 wrote to memory of 2992	1284	3a965754e28255e17381331c733a5062_JaffaCakes118.exe	32
PID 1284 wrote to memory of 2992	1284	3a965754e28255e17381331c733a5062_JaffaCakes118.exe	32
PID 2992 wrote to memory of 2476	2992	LFPKG.exe	33
PID 2992 wrote to memory of 2476	2992	LFPKG.exe	33
PID 2992 wrote to memory of 2476	2992	LFPKG.exe	33
PID 2992 wrote to memory of 2476	2992	LFPKG.exe	33
PID 2992 wrote to memory of 2476	2992	LFPKG.exe	33
PID 2992 wrote to memory of 2476	2992	LFPKG.exe	33
PID 2992 wrote to memory of 2476	2992	LFPKG.exe	33
PID 2992 wrote to memory of 2476	2992	LFPKG.exe	33
PID 2992 wrote to memory of 2476	2992	LFPKG.exe	33
PID 2992 wrote to memory of 2900	2992	LFPKG.exe	36
PID 2992 wrote to memory of 2900	2992	LFPKG.exe	36
PID 2992 wrote to memory of 2900	2992	LFPKG.exe	36
PID 2992 wrote to memory of 2900	2992	LFPKG.exe	36
PID 2992 wrote to memory of 2900	2992	LFPKG.exe	36
PID 2992 wrote to memory of 2900	2992	LFPKG.exe	36
PID 2992 wrote to memory of 2900	2992	LFPKG.exe	36
PID 2992 wrote to memory of 2900	2992	LFPKG.exe	36
PID 2992 wrote to memory of 2900	2992	LFPKG.exe	36

C:\Users\Admin\AppData\Local\Temp\3a965754e28255e17381331c733a5062_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\3a965754e28255e17381331c733a5062_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2076
- C:\Users\Admin\AppData\Local\Temp\3a965754e28255e17381331c733a5062_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\3a965754e28255e17381331c733a5062_JaffaCakes118.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1284
- - C:\Users\Admin\AppData\Local\Temp\LFPKG.exe
    "C:\Users\Admin\AppData\Local\Temp\LFPKG.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2992
  - - C:\Users\Admin\AppData\Local\Temp\LFPKG.exe
      /scomma "C:\Users\Admin\AppData\Local\Temp\BGPDnx0hm0.ini"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:2476
  - - C:\Users\Admin\AppData\Local\Temp\LFPKG.exe
      /scomma "C:\Users\Admin\AppData\Local\Temp\lD4uMVMqSp.ini"
      4⤵
      Executes dropped EXE
      Accesses Microsoft Outlook accounts
      System Location Discovery: System Language Discovery
      PID:2900
- C:\Users\Admin\AppData\Local\Temp\3a965754e28255e17381331c733a5062_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\3a965754e28255e17381331c733a5062_JaffaCakes118.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  PID:912

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\BGPDnx0hm0.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
C:\Users\Admin\AppData\Local\Temp\LFPKG.exe

Filesize
260KB

MD5
82ce6a2616f9b8e7c9037df683083524

SHA1
bcdef4e3b26634d84f5c02148a7b720a3c434407

SHA256
5f178dd7febe66cf37bb293133a99315fc3b8b3b903655381a7404e79a969b42

SHA512
10d326f05eaa5e16b7d087fb54ce59a772e67f00b33b82356b47d73ad775fff74588d4bcee3760430c5de49d9220ca4f1e1eeacf87caad11d55e4fc5be133a4c

Download Submit
\Users\Admin\AppData\Local\Temp\dup2patcher.dll

Filesize
55KB

MD5
43bcd632e19ac3fdc43e7958465ce835

SHA1
30454241e95b78ddb125a4c784f160609589ee5f

SHA256
7694627600115240b503f214cbfb9106415802c345e982c3bf9c8d05910a1a7c

SHA512
ffe7507bcc2413a5b846ec62b9edd3ec94d79a2fd3ecaf4ce2ddb96a7d42facdfa9aabd84d06e15ab644ae478715c566a91e9bb8ba12fc9ff9a3b8390ca6d886

Download Submit
memory/912-379-0x0000000074F60000-0x0000000074F86000-memory.dmp

Filesize
152KB

Download
memory/912-325-0x0000000074F60000-0x0000000074F86000-memory.dmp

Filesize
152KB

Download
memory/1284-374-0x0000000000400000-0x0000000000449000-memory.dmp

Filesize
292KB

Download
memory/1284-356-0x0000000000400000-0x0000000000449000-memory.dmp

Filesize
292KB

Download
memory/1284-318-0x0000000000400000-0x0000000000449000-memory.dmp

Filesize
292KB

Download
memory/2076-94-0x00000000032E0000-0x00000000032E1000-memory.dmp

Filesize
4KB

Download
memory/2076-144-0x00000000034A0000-0x00000000034A1000-memory.dmp

Filesize
4KB

Download
memory/2076-20-0x0000000002EE0000-0x0000000002EE1000-memory.dmp

Filesize
4KB

Download
memory/2076-22-0x00000000030E0000-0x00000000030E1000-memory.dmp

Filesize
4KB

Download
memory/2076-24-0x00000000030E0000-0x00000000030E1000-memory.dmp

Filesize
4KB

Download
memory/2076-40-0x00000000002D0000-0x00000000002D1000-memory.dmp

Filesize
4KB

Download
memory/2076-50-0x0000000002E50000-0x0000000002E51000-memory.dmp

Filesize
4KB

Download
memory/2076-60-0x0000000003040000-0x0000000003041000-memory.dmp

Filesize
4KB

Download
memory/2076-68-0x00000000002C0000-0x00000000002C1000-memory.dmp

Filesize
4KB

Download
memory/2076-78-0x0000000002BC0000-0x0000000002BC1000-memory.dmp

Filesize
4KB

Download
memory/2076-89-0x00000000001C0000-0x00000000001C1000-memory.dmp

Filesize
4KB

Download
memory/2076-91-0x00000000001D0000-0x00000000001D1000-memory.dmp

Filesize
4KB

Download
memory/2076-2-0x0000000001D70000-0x0000000001D71000-memory.dmp

Filesize
4KB

Download
memory/2076-102-0x0000000003250000-0x0000000003251000-memory.dmp

Filesize
4KB

Download
memory/2076-112-0x0000000003010000-0x0000000003011000-memory.dmp

Filesize
4KB

Download
memory/2076-126-0x00000000034B0000-0x00000000034B1000-memory.dmp

Filesize
4KB

Download
memory/2076-134-0x0000000002D50000-0x0000000002D51000-memory.dmp

Filesize
4KB

Download
memory/2076-18-0x0000000002EE0000-0x0000000002EE1000-memory.dmp

Filesize
4KB

Download
memory/2076-151-0x0000000002C80000-0x0000000002D3A000-memory.dmp

Filesize
744KB

Download
memory/2076-152-0x0000000003470000-0x0000000003471000-memory.dmp

Filesize
4KB

Download
memory/2076-157-0x0000000003240000-0x0000000003241000-memory.dmp

Filesize
4KB

Download
memory/2076-162-0x0000000002BB0000-0x0000000002BB1000-memory.dmp

Filesize
4KB

Download
memory/2076-167-0x0000000003690000-0x0000000003691000-memory.dmp

Filesize
4KB

Download
memory/2076-32-0x0000000002EA0000-0x0000000002EA1000-memory.dmp

Filesize
4KB

Download
memory/2076-16-0x0000000002D60000-0x0000000002D61000-memory.dmp

Filesize
4KB

Download
memory/2076-14-0x0000000002D60000-0x0000000002D61000-memory.dmp

Filesize
4KB

Download
memory/2076-12-0x0000000002C70000-0x0000000002C71000-memory.dmp

Filesize
4KB

Download
memory/2076-4-0x0000000001D70000-0x0000000001D71000-memory.dmp

Filesize
4KB

Download
memory/2076-6-0x0000000002BD0000-0x0000000002BD1000-memory.dmp

Filesize
4KB

Download
memory/2076-10-0x0000000002C70000-0x0000000002C71000-memory.dmp

Filesize
4KB

Download
memory/2076-8-0x0000000002BD0000-0x0000000002BD1000-memory.dmp

Filesize
4KB

Download
memory/2476-354-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2476-348-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2900-366-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2900-371-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download