isrstealer | b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd

Analysis

max time kernel
133s
max time network
139s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
06-12-2022 14:55

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General

Target

b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe
Size

324KB
MD5

58e797d97c447770b6b9d85e70cf9aca
SHA1

ca425a27dd9f7edd66f579c871b3d1ff49efaa73
SHA256

b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd
SHA512

a26820aa51e157da5ee51e54e564f8f4c46c8e5610da3807f2038a2d830d56f36d02e9002cb7dca291dba99fd10b42afc137f7e1e23712ac4336a50c4e403edc
SSDEEP

6144:yoY7yvft3kh+vIjazquDf02UebwfYSD3+AyqvGTX4ULqgqCRqWSc7:yo5vf6PEqC0ObeND3+AyC6GgbKs

Score

10^/10

isrstealer collection 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 5 IoCs

resource	yara_rule
behavioral1/memory/820-56-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/820-57-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/820-67-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/820-79-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/820-80-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/1732-77-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/1732-78-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral1/memory/1732-77-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/1732-78-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1336-61-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1336-65-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1336-66-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1336-68-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1336-69-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1732-72-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1732-76-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1732-77-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1732-78-0x0000000000400000-0x000000000041F000-memory.dmp	upx

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

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1380 set thread context of 820	1380	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe	27
PID 820 set thread context of 1336	820	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe	28
PID 820 set thread context of 1732	820	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe	31

Modifies system certificate store 2 TTPs 3 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 1900000001000000100000002aa1c05e2ae606f198c2c5e937c97aa2030000000100000014000000d1eb23a46d17d68fd92564c2f1f1601764d8e3491d00000001000000100000002e0d6875874a44c820912e85e964cfdb140000000100000014000000a0110a233e96f107ece2af29ef82a57fd030a4b40b00000001000000180000004300b7004f00b7004d00b7004f00b7004400b7004f00000053000000010000002600000030243022060c2b06010401b231010201050130123010060a2b0601040182373c0101030200c0090000000100000034000000303206082b0601050507030106082b0601050507030206082b0601050507030406082b0601050507030306082b060105050703080f00000001000000140000003e8e6487f8fd27d322a269a71edaac5d57811286200000000100000036040000308204323082031aa003020102020101300d06092a864886f70d0101050500307b310b3009060355040613024742311b301906035504080c1247726561746572204d616e636865737465723110300e06035504070c0753616c666f7264311a3018060355040a0c11436f6d6f646f204341204c696d697465643121301f06035504030c18414141204365727469666963617465205365727669636573301e170d3034303130313030303030305a170d3238313233313233353935395a307b310b3009060355040613024742311b301906035504080c1247726561746572204d616e636865737465723110300e06035504070c0753616c666f7264311a3018060355040a0c11436f6d6f646f204341204c696d697465643121301f06035504030c1841414120436572746966696361746520536572766963657330820122300d06092a864886f70d01010105000382010f003082010a0282010100be409df46ee1ea76871c4d45448ebe46c883069dc12afe181f8ee402faf3ab5d508a16310b9a06d0c57022cd492d5463ccb66e68460b53eacb4c24c0bc724eeaf115aef4549a120ac37ab23360e2da8955f32258f3dedccfef8386a28c944f9f68f29890468427c776bfe3cc352c8b5e07646582c048b0a891f9619f762050a891c766b5eb78620356f08a1a13ea31a31ea099fd38f6f62732586f07f56bb8fb142bafb7aaccd6635f738cda0599a838a8cb17783651ace99ef4783a8dcf0fd942e2980cab2f9f0e01deef9f9949f12ddfac744d1b98b547c5e529d1f99018c7629cbe83c7267b3e8a25c7c0dd9de6356810209d8fd8ded2c3849c0d5ee82fc90203010001a381c03081bd301d0603551d0e04160414a0110a233e96f107ece2af29ef82a57fd030a4b4300e0603551d0f0101ff040403020106300f0603551d130101ff040530030101ff307b0603551d1f047430723038a036a0348632687474703a2f2f63726c2e636f6d6f646f63612e636f6d2f414141436572746966696361746553657276696365732e63726c3036a034a0328630687474703a2f2f63726c2e636f6d6f646f2e6e65742f414141436572746966696361746553657276696365732e63726c300d06092a864886f70d010105050003820101000856fc02f09be8ffa4fad67bc64480ce4fc4c5f60058cca6b6bc1449680476e8e6ee5dec020f60d68d50184f264e01e3e6b0a5eebfbc745441bffdfc12b8c74f5af48960057f60b7054af3f6f1c2bfc4b97486b62d7d6bccd2f346dd2fc6e06ac3c334032c7d96dd5ac20ea70a99c1058bab0c2ff35c3acf6c37550987de53406c58effcb6ab656e04f61bdc3ce05a15c69ed9f15948302165036cece92173ec9b03a1e037ada015188ffaba02cea72ca910132cd4e50826ab229760f8905e74d4a29a53bdf2a968e0a26ec2d76cb1a30f9ebfeb68e756f2aef2e32b383a0981b56b85d7be2ded3f1ab7b263e2f5622c82d46a004150f139839f95e93696986e	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1380	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe
820	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 1380 wrote to memory of 820	1380	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe	27
PID 1380 wrote to memory of 820	1380	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe	27
PID 1380 wrote to memory of 820	1380	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe	27
PID 1380 wrote to memory of 820	1380	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe	27
PID 1380 wrote to memory of 820	1380	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe	27
PID 1380 wrote to memory of 820	1380	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe	27
PID 1380 wrote to memory of 820	1380	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe	27
PID 1380 wrote to memory of 820	1380	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe	27
PID 1380 wrote to memory of 820	1380	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe	27
PID 820 wrote to memory of 1336	820	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe	28
PID 820 wrote to memory of 1336	820	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe	28
PID 820 wrote to memory of 1336	820	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe	28
PID 820 wrote to memory of 1336	820	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe	28
PID 820 wrote to memory of 1336	820	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe	28
PID 820 wrote to memory of 1336	820	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe	28
PID 820 wrote to memory of 1336	820	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe	28
PID 820 wrote to memory of 1336	820	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe	28
PID 820 wrote to memory of 1336	820	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe	28
PID 820 wrote to memory of 1732	820	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe	31
PID 820 wrote to memory of 1732	820	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe	31
PID 820 wrote to memory of 1732	820	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe	31
PID 820 wrote to memory of 1732	820	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe	31
PID 820 wrote to memory of 1732	820	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe	31
PID 820 wrote to memory of 1732	820	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe	31
PID 820 wrote to memory of 1732	820	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe	31
PID 820 wrote to memory of 1732	820	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe	31
PID 820 wrote to memory of 1732	820	b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe	31

C:\Users\Admin\AppData\Local\Temp\b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe
"C:\Users\Admin\AppData\Local\Temp\b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1380
- C:\Users\Admin\AppData\Local\Temp\b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe
  "C:\Users\Admin\AppData\Local\Temp\b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Modifies system certificate store
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:820
- - C:\Users\Admin\AppData\Local\Temp\b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\A8OalrrSYT.ini"
    3⤵
    PID:1336
- - C:\Users\Admin\AppData\Local\Temp\b1b5634d82b54f236ec950694065a46c7f3f7d381d747d9ef67cfff6db1de9bd.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\hTA2hGg2Jm.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:1732

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Install Root Certificate

T1130

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\A8OalrrSYT.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/820-67-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/820-80-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/820-79-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/820-56-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1336-68-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1336-66-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1336-65-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1336-69-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1336-64-0x00000000757A1000-0x00000000757A3000-memory.dmp

Filesize
8KB

Download
memory/1336-61-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1732-72-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1732-76-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1732-77-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1732-78-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download