isrstealer | bb64e688ed77464721aed2f6ccf8a730d5cdd5ae6bb2884e9d3ee46ae41fcdad

General

Target

dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118.exe
Size

1.2MB
MD5

dbb411b31c2f2beb3cf20e5f428c6100
SHA1

4d61b3d4bf11f05b05f55f6014056f6c6b28dab1
SHA256

bb64e688ed77464721aed2f6ccf8a730d5cdd5ae6bb2884e9d3ee46ae41fcdad
SHA512

d5120df6db4dce07b37c15c405e156507bf8b08e3013f939741d1a6af63b7c51cc6923981b1973961b3a2e86dc736565cfdeb33bb27654da717682bba8c46f2a
SSDEEP

24576:BRmJkcoQricOIQxiZY1WN9G4aEMuoKqWlOAXzxaA:uJZoQrbTFZY1WN9G4aEMbgOADkA

Score

10^/10

isrstealer 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 3 IoCs

resource	yara_rule
behavioral2/memory/4752-9-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral2/memory/4752-11-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral2/memory/4752-23-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/memory/2876-0-0x0000000000400000-0x0000000000509000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2876 set thread context of 4752	2876	dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118.exe	83
PID 4752 set thread context of 3552	4752	calc.exe	84

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3552-14-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3552-17-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3552-18-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3552-19-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3552-21-0x0000000000400000-0x0000000000453000-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 3 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	dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	calc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	calc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4752	calc.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2876 wrote to memory of 4752	2876	dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118.exe	83
PID 2876 wrote to memory of 4752	2876	dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118.exe	83
PID 2876 wrote to memory of 4752	2876	dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118.exe	83
PID 2876 wrote to memory of 4752	2876	dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118.exe	83
PID 2876 wrote to memory of 4752	2876	dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118.exe	83
PID 4752 wrote to memory of 3552	4752	calc.exe	84
PID 4752 wrote to memory of 3552	4752	calc.exe	84
PID 4752 wrote to memory of 3552	4752	calc.exe	84
PID 4752 wrote to memory of 3552	4752	calc.exe	84
PID 4752 wrote to memory of 3552	4752	calc.exe	84
PID 4752 wrote to memory of 3552	4752	calc.exe	84
PID 4752 wrote to memory of 3552	4752	calc.exe	84
PID 4752 wrote to memory of 3552	4752	calc.exe	84

C:\Users\Admin\AppData\Local\Temp\dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2876
- C:\Windows\SysWOW64\calc.exe
  "C:\Windows\SysWOW64\calc.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4752
- - C:\Windows\SysWOW64\calc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3552

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\autAF3B.tmp

Filesize
196KB

MD5
341c286009802e630bb2c2fadc192d4b

SHA1
982341dec725fffe13d7fc81d5b2f9112622af4c

SHA256
b5c600cf2a879be00fb957fdd54b0b08ffb5f46d1b9e2d65be66690d389ed9e4

SHA512
870625d59e068720b5175ff458958578de080c7fee46b789e84b2a25309fd688015a85917c0ebff99138eaab06f829965ca320691d93e2f6c15f4856d1d1d32a

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/2876-0-0x0000000000400000-0x0000000000509000-memory.dmp

Filesize
1.0MB

Download
memory/3552-14-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3552-17-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3552-18-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3552-19-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3552-21-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4752-9-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/4752-11-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/4752-23-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download

Analysis

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