isrstealer | 2b2eea41b09e087fc9d52ce6804362345ea039ceac7e414a47d3fa2d425223c5

General

Target

56c51408980214acddab69287af0ecdd_JaffaCakes118.exe
Size

5.7MB
MD5

56c51408980214acddab69287af0ecdd
SHA1

ac755c57cca84a40678d686905a9d7ea4d3cc2ae
SHA256

2b2eea41b09e087fc9d52ce6804362345ea039ceac7e414a47d3fa2d425223c5
SHA512

ed7f456ffa328182a1c8e03b3d08cc47526d81c53a9fef3a40ea6d52264df611578cca9828979a7fc4ccfee2703bd38a9dd8192902978744856371a85c5be218
SSDEEP

6144:7/m9kF4LhB959Ak24Fa8yVRasuSuvfQ1dskAsaJraBCDorAB:bfFWB9bpFatVMPfgsVpraB

Score

10^/10

isrstealer 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
behavioral2/memory/3672-3-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/3672-5-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/3672-20-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/3672-23-0x0000000000400000-0x0000000000435000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000\Control Panel\International\Geo\Nation	56c51408980214acddab69287af0ecdd_JaffaCakes118.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/904-8-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/904-10-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/904-11-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/904-12-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/904-16-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3136 set thread context of 3672	3136	56c51408980214acddab69287af0ecdd_JaffaCakes118.exe	86
PID 3672 set thread context of 904	3672	vbc.exe	87

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

System Information Discovery
T1082

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3760	PING.EXE

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3672	vbc.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 3136 wrote to memory of 3672	3136	56c51408980214acddab69287af0ecdd_JaffaCakes118.exe	86
PID 3136 wrote to memory of 3672	3136	56c51408980214acddab69287af0ecdd_JaffaCakes118.exe	86
PID 3136 wrote to memory of 3672	3136	56c51408980214acddab69287af0ecdd_JaffaCakes118.exe	86
PID 3136 wrote to memory of 3672	3136	56c51408980214acddab69287af0ecdd_JaffaCakes118.exe	86
PID 3136 wrote to memory of 3672	3136	56c51408980214acddab69287af0ecdd_JaffaCakes118.exe	86
PID 3136 wrote to memory of 3672	3136	56c51408980214acddab69287af0ecdd_JaffaCakes118.exe	86
PID 3136 wrote to memory of 3672	3136	56c51408980214acddab69287af0ecdd_JaffaCakes118.exe	86
PID 3136 wrote to memory of 3672	3136	56c51408980214acddab69287af0ecdd_JaffaCakes118.exe	86
PID 3672 wrote to memory of 904	3672	vbc.exe	87
PID 3672 wrote to memory of 904	3672	vbc.exe	87
PID 3672 wrote to memory of 904	3672	vbc.exe	87
PID 3672 wrote to memory of 904	3672	vbc.exe	87
PID 3672 wrote to memory of 904	3672	vbc.exe	87
PID 3672 wrote to memory of 904	3672	vbc.exe	87
PID 3672 wrote to memory of 904	3672	vbc.exe	87
PID 3672 wrote to memory of 904	3672	vbc.exe	87
PID 3136 wrote to memory of 2472	3136	56c51408980214acddab69287af0ecdd_JaffaCakes118.exe	89
PID 3136 wrote to memory of 2472	3136	56c51408980214acddab69287af0ecdd_JaffaCakes118.exe	89
PID 3136 wrote to memory of 2472	3136	56c51408980214acddab69287af0ecdd_JaffaCakes118.exe	89
PID 2472 wrote to memory of 3760	2472	cmd.exe	91
PID 2472 wrote to memory of 3760	2472	cmd.exe	91
PID 2472 wrote to memory of 3760	2472	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\56c51408980214acddab69287af0ecdd_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\56c51408980214acddab69287af0ecdd_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3136
- 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 use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3672
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\bdO08renS6.ini"
    3⤵
    PID:904
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C ping 1.1.1.1 -n 1 -w 1000 > Nul & Del "C:\Users\Admin\AppData\Local\Temp\56c51408980214acddab69287af0ecdd_JaffaCakes118.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2472
- - C:\Windows\SysWOW64\PING.EXE
    ping 1.1.1.1 -n 1 -w 1000
    3⤵
    - Runs ping.exe
    PID:3760

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

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\bdO08renS6.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/904-16-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/904-12-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/904-14-0x0000000000460000-0x0000000000529000-memory.dmp

Filesize
804KB

Download
memory/904-11-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/904-8-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/904-10-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3136-2-0x00000000753D0000-0x0000000075981000-memory.dmp

Filesize
5.7MB

Download
memory/3136-0-0x00000000753D2000-0x00000000753D3000-memory.dmp

Filesize
4KB

Download
memory/3136-18-0x00000000753D0000-0x0000000075981000-memory.dmp

Filesize
5.7MB

Download
memory/3136-1-0x00000000753D0000-0x0000000075981000-memory.dmp

Filesize
5.7MB

Download
memory/3672-5-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/3672-3-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/3672-20-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/3672-23-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download

Analysis

Sharing