isrstealer | 55b9456881506f6018058f0fecf3584d65597a9e8bfb3fd1868778e9c4244d47

General

Target

1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe
Size

137KB
MD5

1f86f265b63652abd53a4989f2e16097
SHA1

bedeb78f3304eca6fa6adbd40bdf68322b10f01d
SHA256

55b9456881506f6018058f0fecf3584d65597a9e8bfb3fd1868778e9c4244d47
SHA512

89b21e1d3068ff5eae232f7bfdef2ed3af1670e295c631c625b2cb14fd9319f772d3c5d243ca1c9094af2ebaf454bed2d8878f571f69356bf2047f1617be73b2
SSDEEP

3072:s0OKBe+vadnvxd1OiaLGcaElFkdkhFdwDUgozQF:s5AFyh5ALcEvkahFKDUgou

Score

10^/10

isrstealer persistence 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

Processes:

resource	yara_rule
behavioral2/memory/876-3-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/876-5-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/876-16-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/876-20-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Reads user/profile data of web browsers 2 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

UPX packed file 3 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2168-0-0x0000000000400000-0x000000000044A000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\svchost.exe	upx
behavioral2/memory/2168-15-0x0000000000400000-0x000000000044A000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\IgfxTray = "C:\\Users\\Admin\\AppData\\Local\\Temp\\svchost.exe"	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe

description	pid	process	target process
PID 2168 set thread context of 876	2168	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe

pid	process
876	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe
876	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe
876	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe
876	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe
876	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe
876	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe
876	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe
876	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe

pid process

2168 1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe
876 1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe

pid	process
2168	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe
876	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe

description	pid	process	target process
PID 2168 wrote to memory of 876	2168	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe
PID 2168 wrote to memory of 876	2168	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe
PID 2168 wrote to memory of 876	2168	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe
PID 2168 wrote to memory of 876	2168	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe
PID 2168 wrote to memory of 876	2168	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe
PID 2168 wrote to memory of 876	2168	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe
PID 2168 wrote to memory of 876	2168	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe
PID 2168 wrote to memory of 876	2168	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe
PID 2168 wrote to memory of 2632	2168	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe	cmd.exe
PID 2168 wrote to memory of 2632	2168	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe	cmd.exe
PID 2168 wrote to memory of 2632	2168	1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe	cmd.exe

C:\Users\Admin\AppData\Local\Temp\1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2168
- C:\Users\Admin\AppData\Local\Temp\1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\1f86f265b63652abd53a4989f2e16097_JaffaCakes118.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:876
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\YBo05NXJK3uhu.bat" "
  2⤵
  PID:2632

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Unsecured Credentials

2

T1552

Credentials In Files

2

T1552.001

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\YBo05NXJK3uhu.bat

Filesize
285B

MD5
61470d3215847a1b09797bb052cce77d

SHA1
8cfc5f24560be3f97161db2d058ed2bf0819c77c

SHA256
539c3797ab9b3c778c51a0806b6417f337401ef2bd359e73e3b0aeb9eed6fbaa

SHA512
5a425f304d93714d6cced82bad61a95c671edead7df1f36908a4f82328aeb242ec2d4c6c79b546eb384e13031f1d066aff82487bed8fc81abe559f79aedf9597

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

Filesize
137KB

MD5
1f86f265b63652abd53a4989f2e16097

SHA1
bedeb78f3304eca6fa6adbd40bdf68322b10f01d

SHA256
55b9456881506f6018058f0fecf3584d65597a9e8bfb3fd1868778e9c4244d47

SHA512
89b21e1d3068ff5eae232f7bfdef2ed3af1670e295c631c625b2cb14fd9319f772d3c5d243ca1c9094af2ebaf454bed2d8878f571f69356bf2047f1617be73b2

Download Submit
memory/876-3-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/876-5-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/876-16-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/876-18-0x0000000000420000-0x00000000004E9000-memory.dmp

Filesize
804KB

Download
memory/876-20-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2168-0-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/2168-15-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads