isrstealer | 6be2e789944d80ec9bd38c47409d28c2cd5780d92a1c2a5033e898cc5a421876

General

Target

2e2269e8d4c3a268fafd3f798c123a34_JaffaCakes118.exe
Size

352KB
MD5

2e2269e8d4c3a268fafd3f798c123a34
SHA1

4f2b474b20ddd19fb8882ea43bcc27975f4e21ad
SHA256

6be2e789944d80ec9bd38c47409d28c2cd5780d92a1c2a5033e898cc5a421876
SHA512

b7d2b4e6f83bd7477642da1c13810fba2c9b230a884b1ac1913defa7ebf6e43bad062861757cd3750b5d52ee6c77e4c90b8fbc1ccd57bf79447701e50b0bb218
SSDEEP

6144:TecMcsQ2GsTUA2UOo2Jc4aCEQ+IDW6PIXTb6on:TLMcsQ2GsTUA2UOo2Jc4aCEQ+56PIXZn

Score

10^/10

isrstealer spyware stealer trojan

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/1100-6-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/1100-11-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/1100-14-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/1100-24-0x0000000000400000-0x0000000000414000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-771719357-2485960699-3367710044-1000\Control Panel\International\Geo\Nation	2e2269e8d4c3a268fafd3f798c123a34_JaffaCakes118.exe

Executes dropped EXE 2 IoCs

pid	Process
1100	svchost.exe
4692	coddy.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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1232 set thread context of 1100	1232	2e2269e8d4c3a268fafd3f798c123a34_JaffaCakes118.exe	85

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
1100	svchost.exe
1100	svchost.exe
1100	svchost.exe
1100	svchost.exe
1100	svchost.exe
1100	svchost.exe
1100	svchost.exe
1100	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1100	svchost.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1232 wrote to memory of 1100	1232	2e2269e8d4c3a268fafd3f798c123a34_JaffaCakes118.exe	85
PID 1232 wrote to memory of 1100	1232	2e2269e8d4c3a268fafd3f798c123a34_JaffaCakes118.exe	85
PID 1232 wrote to memory of 1100	1232	2e2269e8d4c3a268fafd3f798c123a34_JaffaCakes118.exe	85
PID 1232 wrote to memory of 1100	1232	2e2269e8d4c3a268fafd3f798c123a34_JaffaCakes118.exe	85
PID 1232 wrote to memory of 1100	1232	2e2269e8d4c3a268fafd3f798c123a34_JaffaCakes118.exe	85
PID 1232 wrote to memory of 1100	1232	2e2269e8d4c3a268fafd3f798c123a34_JaffaCakes118.exe	85
PID 1232 wrote to memory of 1100	1232	2e2269e8d4c3a268fafd3f798c123a34_JaffaCakes118.exe	85
PID 1232 wrote to memory of 1100	1232	2e2269e8d4c3a268fafd3f798c123a34_JaffaCakes118.exe	85
PID 1232 wrote to memory of 4692	1232	2e2269e8d4c3a268fafd3f798c123a34_JaffaCakes118.exe	86
PID 1232 wrote to memory of 4692	1232	2e2269e8d4c3a268fafd3f798c123a34_JaffaCakes118.exe	86
PID 1232 wrote to memory of 4692	1232	2e2269e8d4c3a268fafd3f798c123a34_JaffaCakes118.exe	86

C:\Users\Admin\AppData\Local\Temp\2e2269e8d4c3a268fafd3f798c123a34_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\2e2269e8d4c3a268fafd3f798c123a34_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1232
- C:\Users\Admin\AppData\Local\Temp\svchost.exe
  C:\Users\Admin\AppData\Local\Temp\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:1100
- C:\Users\Admin\AppData\Local\Temp\coddy.exe
  "C:\Users\Admin\AppData\Local\Temp\coddy.exe"
  2⤵
  - Executes dropped EXE
  PID:4692

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\coddy.exe

Filesize
66KB

MD5
a429f89aef3c7a88885cb6dcaa0cf19c

SHA1
5f7a396c8a5a99c3d4acc8197010a14360f6cfd0

SHA256
9fefa991d85df855faadaaa60fb7a6e8339b80fc6059367b759630982d13a644

SHA512
100084ba81e2968a6515d0ab297330a5f4e9ac334ee5253eb2a7b3bb765676b39aec5598625132620d91196cc5fcd13a71744b005230becbb7999290c949d9ed

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

Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
memory/1100-24-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1100-22-0x0000000000420000-0x00000000004E9000-memory.dmp

Filesize
804KB

Download
memory/1100-6-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1100-11-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1100-14-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1232-1-0x0000000074DD0000-0x0000000075381000-memory.dmp

Filesize
5.7MB

Download
memory/1232-0-0x0000000074DD2000-0x0000000074DD3000-memory.dmp

Filesize
4KB

Download
memory/1232-2-0x0000000074DD0000-0x0000000075381000-memory.dmp

Filesize
5.7MB

Download
memory/1232-32-0x0000000074DD0000-0x0000000075381000-memory.dmp

Filesize
5.7MB

Download
memory/4692-29-0x0000000074DD2000-0x0000000074DD3000-memory.dmp

Filesize
4KB

Download
memory/4692-30-0x0000000074DD0000-0x0000000075381000-memory.dmp

Filesize
5.7MB

Download
memory/4692-31-0x0000000074DD0000-0x0000000075381000-memory.dmp

Filesize
5.7MB

Download
memory/4692-33-0x0000000074DD0000-0x0000000075381000-memory.dmp

Filesize
5.7MB

Download
memory/4692-34-0x0000000074DD2000-0x0000000074DD3000-memory.dmp

Filesize
4KB

Download
memory/4692-35-0x0000000074DD0000-0x0000000075381000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing