isrstealer | cc785f2a60e7154af09b2400351614312aa1593fe5e4ede46bda037a4af2dfef

Analysis

max time kernel
125s
max time network
182s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
20-10-2022 06:31

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General

Target

cc785f2a60e7154af09b2400351614312aa1593fe5e4ede46bda037a4af2dfef.exe
Size

500KB
MD5

79c7e4a244017292cb2bdb39c304ae40
SHA1

c25ff87a548815bbe31ced252dea455660a993c4
SHA256

cc785f2a60e7154af09b2400351614312aa1593fe5e4ede46bda037a4af2dfef
SHA512

3414ce05a3f217e6e90ff26041dc0fbc0e05b1ddf5af249c1e31f664c54c9586cae5e216de1b8ed58eba450e906450567336bf1fdf57a810b841285b13cf86c6
SSDEEP

12288:OJu2fqhZxEb0YQF9RKVWPkN/eMaGfTFtaJ:OQ2wZagR0CI/oGbFO

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

resource	yara_rule
behavioral2/memory/4496-151-0x0000000000000000-mapping.dmp	family_isrstealer
behavioral2/memory/4496-152-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/4496-164-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/4496-169-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer

Executes dropped EXE 4 IoCs

pid	Process
4964	REALAP~1.EXE
3292	REGIST~1.EXE
4496	REGIST~1.EXE
1776	REGIST~1.EXE

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1776-159-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1776-162-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1776-163-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1776-165-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1776-166-0x0000000000400000-0x0000000000453000-memory.dmp	upx

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-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	REGIST~1.EXE

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
T1081

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows\CurrentVersion\Run	REGIST~1.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\IgfxTray = "C:\\Users\\Admin\\AppData\\Local\\Temp\\svchost.exe"	REGIST~1.EXE
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce	cc785f2a60e7154af09b2400351614312aa1593fe5e4ede46bda037a4af2dfef.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\wextract_cleanup0 = "rundll32.exe C:\\Windows\\system32\\advpack.dll,DelNodeRunDLL32 \"C:\\Users\\Admin\\AppData\\Local\\Temp\\IXP000.TMP\\\""	cc785f2a60e7154af09b2400351614312aa1593fe5e4ede46bda037a4af2dfef.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3292 set thread context of 4496	3292	REGIST~1.EXE	85
PID 4496 set thread context of 1776	4496	REGIST~1.EXE	86

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

System Information Discovery
T1082

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3292	REGIST~1.EXE
4496	REGIST~1.EXE

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 4916 wrote to memory of 4964	4916	cc785f2a60e7154af09b2400351614312aa1593fe5e4ede46bda037a4af2dfef.exe	81
PID 4916 wrote to memory of 4964	4916	cc785f2a60e7154af09b2400351614312aa1593fe5e4ede46bda037a4af2dfef.exe	81
PID 4916 wrote to memory of 4964	4916	cc785f2a60e7154af09b2400351614312aa1593fe5e4ede46bda037a4af2dfef.exe	81
PID 4964 wrote to memory of 4880	4964	REALAP~1.EXE	82
PID 4964 wrote to memory of 4880	4964	REALAP~1.EXE	82
PID 4916 wrote to memory of 3292	4916	cc785f2a60e7154af09b2400351614312aa1593fe5e4ede46bda037a4af2dfef.exe	83
PID 4916 wrote to memory of 3292	4916	cc785f2a60e7154af09b2400351614312aa1593fe5e4ede46bda037a4af2dfef.exe	83
PID 4916 wrote to memory of 3292	4916	cc785f2a60e7154af09b2400351614312aa1593fe5e4ede46bda037a4af2dfef.exe	83
PID 3292 wrote to memory of 4496	3292	REGIST~1.EXE	85
PID 3292 wrote to memory of 4496	3292	REGIST~1.EXE	85
PID 3292 wrote to memory of 4496	3292	REGIST~1.EXE	85
PID 3292 wrote to memory of 4496	3292	REGIST~1.EXE	85
PID 3292 wrote to memory of 4496	3292	REGIST~1.EXE	85
PID 3292 wrote to memory of 4496	3292	REGIST~1.EXE	85
PID 3292 wrote to memory of 4496	3292	REGIST~1.EXE	85
PID 3292 wrote to memory of 4496	3292	REGIST~1.EXE	85
PID 4496 wrote to memory of 1776	4496	REGIST~1.EXE	86
PID 4496 wrote to memory of 1776	4496	REGIST~1.EXE	86
PID 4496 wrote to memory of 1776	4496	REGIST~1.EXE	86
PID 4496 wrote to memory of 1776	4496	REGIST~1.EXE	86
PID 4496 wrote to memory of 1776	4496	REGIST~1.EXE	86
PID 4496 wrote to memory of 1776	4496	REGIST~1.EXE	86
PID 4496 wrote to memory of 1776	4496	REGIST~1.EXE	86
PID 4496 wrote to memory of 1776	4496	REGIST~1.EXE	86
PID 3292 wrote to memory of 220	3292	REGIST~1.EXE	87
PID 3292 wrote to memory of 220	3292	REGIST~1.EXE	87
PID 3292 wrote to memory of 220	3292	REGIST~1.EXE	87

C:\Users\Admin\AppData\Local\Temp\cc785f2a60e7154af09b2400351614312aa1593fe5e4ede46bda037a4af2dfef.exe
"C:\Users\Admin\AppData\Local\Temp\cc785f2a60e7154af09b2400351614312aa1593fe5e4ede46bda037a4af2dfef.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:4916
- C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\REALAP~1.EXE
  C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\REALAP~1.EXE
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:4964
- - C:\Program Files\Java\jre1.8.0_66\bin\javaw.exe
    "C:\Program Files\Java\jre1.8.0_66\bin\javaw.exe" -jar "C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\REALAP~1.EXE"
    3⤵
    PID:4880
- C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\REGIST~1.EXE
  C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\REGIST~1.EXE
  2⤵
  - Executes dropped EXE
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3292
- - C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\REGIST~1.EXE
    C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\REGIST~1.EXE
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4496
  - - C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\REGIST~1.EXE
      /scomma "C:\Users\Admin\AppData\Local\Temp\Hafn2Kamzv.ini"
      4⤵
      Executes dropped EXE
      PID:1776
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\GXIRjoCn.bat" "
    3⤵
    PID:220

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
199B

MD5
ec9c25de88bb53c2fdc87494a2e8c452

SHA1
f74dd34b7c1900e58a4b1fb5b33d8b7f22bf55ff

SHA256
6d2c990f041e984098f31a0efafd35c5d77de3c56420d16bc5a89ac2c30f5907

SHA512
906ef3dd44b60ca06780d9cc690ae4f3f88d4a61db951cd79f0cc745872f97e0525688eb477354d28b0b3df17939afe4b9ccbb19bc4ef477a11eaf3c49b649c3

Download Submit
C:\Users\Admin\AppData\Local\Temp\Hafn2Kamzv.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\REALAP~1.EXE

Filesize
446KB

MD5
dad5d7d325b2917b1c6f0d7b2032ea24

SHA1
af2c7bb4f4c435160c6a3356ecc8ee55260a9e08

SHA256
8e381244137fda00c22958e8f20d27ad1a476e3f225d8a49d8395760e4965ec6

SHA512
fd743b9b9105fffb94b4a943623c1b9b7e1eaa233c1c09c59d0082cc9c7e2ff702adb266771871528db0e59e00d6ba35a80809d7a05d733bc5d1f1356db2c5bb

Download Submit
C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\REALAP~1.EXE

Filesize
446KB

MD5
dad5d7d325b2917b1c6f0d7b2032ea24

SHA1
af2c7bb4f4c435160c6a3356ecc8ee55260a9e08

SHA256
8e381244137fda00c22958e8f20d27ad1a476e3f225d8a49d8395760e4965ec6

SHA512
fd743b9b9105fffb94b4a943623c1b9b7e1eaa233c1c09c59d0082cc9c7e2ff702adb266771871528db0e59e00d6ba35a80809d7a05d733bc5d1f1356db2c5bb

Download Submit
C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\REGIST~1.EXE

Filesize
428KB

MD5
392c3e68c0dcfa4152d49b8e86b67b60

SHA1
bf0c8bc3431e287056ab719dfd05912fc4592050

SHA256
45f04acd0b4ea1854a40d853ec27782409d7ed8141e07747980526a904458c0b

SHA512
c67c00d702b6ad78fb480116828fe30f45929ad9876e625e152033d22d7d4dcd0caeb70324902f32fb340b5d70db1acf638c8f94526d6597c1ef283a53879e66

Download Submit
C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\REGIST~1.EXE

Filesize
428KB

MD5
392c3e68c0dcfa4152d49b8e86b67b60

SHA1
bf0c8bc3431e287056ab719dfd05912fc4592050

SHA256
45f04acd0b4ea1854a40d853ec27782409d7ed8141e07747980526a904458c0b

SHA512
c67c00d702b6ad78fb480116828fe30f45929ad9876e625e152033d22d7d4dcd0caeb70324902f32fb340b5d70db1acf638c8f94526d6597c1ef283a53879e66

Download Submit
C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\REGIST~1.EXE

Filesize
428KB

MD5
392c3e68c0dcfa4152d49b8e86b67b60

SHA1
bf0c8bc3431e287056ab719dfd05912fc4592050

SHA256
45f04acd0b4ea1854a40d853ec27782409d7ed8141e07747980526a904458c0b

SHA512
c67c00d702b6ad78fb480116828fe30f45929ad9876e625e152033d22d7d4dcd0caeb70324902f32fb340b5d70db1acf638c8f94526d6597c1ef283a53879e66

Download Submit
C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\REGIST~1.EXE

Filesize
428KB

MD5
392c3e68c0dcfa4152d49b8e86b67b60

SHA1
bf0c8bc3431e287056ab719dfd05912fc4592050

SHA256
45f04acd0b4ea1854a40d853ec27782409d7ed8141e07747980526a904458c0b

SHA512
c67c00d702b6ad78fb480116828fe30f45929ad9876e625e152033d22d7d4dcd0caeb70324902f32fb340b5d70db1acf638c8f94526d6597c1ef283a53879e66

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

Filesize
428KB

MD5
392c3e68c0dcfa4152d49b8e86b67b60

SHA1
bf0c8bc3431e287056ab719dfd05912fc4592050

SHA256
45f04acd0b4ea1854a40d853ec27782409d7ed8141e07747980526a904458c0b

SHA512
c67c00d702b6ad78fb480116828fe30f45929ad9876e625e152033d22d7d4dcd0caeb70324902f32fb340b5d70db1acf638c8f94526d6597c1ef283a53879e66

Download Submit
memory/1776-165-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1776-166-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1776-163-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1776-159-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1776-162-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4496-152-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/4496-164-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/4496-169-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/4880-157-0x00000000029E0000-0x00000000039E0000-memory.dmp

Filesize
16.0MB

Download
memory/4880-145-0x00000000029E0000-0x00000000039E0000-memory.dmp

Filesize
16.0MB

Download