isrstealer | fda31f149676a5c9010d283b6302cbd148691b3129ce4481e8d8c4fe2912639b

Analysis

max time kernel
189s
max time network
196s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
01-12-2022 07:21

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General

Target

fda31f149676a5c9010d283b6302cbd148691b3129ce4481e8d8c4fe2912639b.exe
Size

659KB
MD5

40c4dcef207f79fd87ed126feaf47b20
SHA1

170f9a30aced77be9f85393c26d937136c0aaf7d
SHA256

fda31f149676a5c9010d283b6302cbd148691b3129ce4481e8d8c4fe2912639b
SHA512

4835faee2c71a59746d473a3cc55142bb6530aa1d2ab65052feac0e8d100e3aa98f263814efc6dea212c226d87bc473713cc932810d796f6959952a7b4b802cc
SSDEEP

12288:8GtnpSXzRVLgoGugOoMkWMjj4bntiJqvDBV4bTnYtC4qVknvjjun6UHGG9:8GtnpqPLgnlOoN5fYM4quvWfd9

Score

10^/10

isrstealer 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 3 IoCs

resource	yara_rule
behavioral2/memory/2968-152-0x0000000000400000-0x0000000000418000-memory.dmp	family_isrstealer
behavioral2/memory/2968-156-0x0000000000400000-0x0000000000418000-memory.dmp	family_isrstealer
behavioral2/memory/2968-157-0x0000000000400000-0x0000000000418000-memory.dmp	family_isrstealer

Executes dropped EXE 3 IoCs

pid	Process
2584	Patch.exe
1916	xx.exe
2968	xx.exe

UPX packed file 11 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0006000000022e4c-136.dat	upx
behavioral2/files/0x0006000000022e4c-137.dat	upx
behavioral2/memory/1916-141-0x0000000000400000-0x000000000047E000-memory.dmp	upx
behavioral2/memory/1916-145-0x0000000000400000-0x000000000047E000-memory.dmp	upx
behavioral2/memory/2968-148-0x0000000000400000-0x0000000000418000-memory.dmp	upx
behavioral2/files/0x0006000000022e4c-149.dat	upx
behavioral2/memory/2968-151-0x0000000000400000-0x0000000000418000-memory.dmp	upx
behavioral2/memory/2968-152-0x0000000000400000-0x0000000000418000-memory.dmp	upx
behavioral2/memory/1916-155-0x0000000000400000-0x000000000047E000-memory.dmp	upx
behavioral2/memory/2968-156-0x0000000000400000-0x0000000000418000-memory.dmp	upx
behavioral2/memory/2968-157-0x0000000000400000-0x0000000000418000-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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	fda31f149676a5c9010d283b6302cbd148691b3129ce4481e8d8c4fe2912639b.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
T1081
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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1916 set thread context of 2968	1916	xx.exe	83

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2968	xx.exe
2968	xx.exe
2968	xx.exe
2968	xx.exe
2968	xx.exe
2968	xx.exe
2968	xx.exe
2968	xx.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2584	Patch.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2584	Patch.exe
Token: 33	2584	Patch.exe
Token: SeIncBasePriorityPrivilege	2584	Patch.exe
Token: 33	3388	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	3388	AUDIODG.EXE
Token: 33	2584	Patch.exe
Token: SeIncBasePriorityPrivilege	2584	Patch.exe
Token: 33	2584	Patch.exe
Token: SeIncBasePriorityPrivilege	2584	Patch.exe
Token: 33	2584	Patch.exe
Token: SeIncBasePriorityPrivilege	2584	Patch.exe
Token: 33	2584	Patch.exe
Token: SeIncBasePriorityPrivilege	2584	Patch.exe
Token: 33	2584	Patch.exe
Token: SeIncBasePriorityPrivilege	2584	Patch.exe
Token: 33	2584	Patch.exe
Token: SeIncBasePriorityPrivilege	2584	Patch.exe
Token: 33	2584	Patch.exe
Token: SeIncBasePriorityPrivilege	2584	Patch.exe
Token: 33	2584	Patch.exe
Token: SeIncBasePriorityPrivilege	2584	Patch.exe
Token: 33	2584	Patch.exe
Token: SeIncBasePriorityPrivilege	2584	Patch.exe
Token: 33	2584	Patch.exe
Token: SeIncBasePriorityPrivilege	2584	Patch.exe
Token: 33	2584	Patch.exe
Token: SeIncBasePriorityPrivilege	2584	Patch.exe
Token: 33	2584	Patch.exe
Token: SeIncBasePriorityPrivilege	2584	Patch.exe
Token: 33	2584	Patch.exe
Token: SeIncBasePriorityPrivilege	2584	Patch.exe
Token: 33	2584	Patch.exe
Token: SeIncBasePriorityPrivilege	2584	Patch.exe
Token: 33	2584	Patch.exe
Token: SeIncBasePriorityPrivilege	2584	Patch.exe
Token: 33	2584	Patch.exe
Token: SeIncBasePriorityPrivilege	2584	Patch.exe
Token: 33	2584	Patch.exe
Token: SeIncBasePriorityPrivilege	2584	Patch.exe
Token: 33	2584	Patch.exe
Token: SeIncBasePriorityPrivilege	2584	Patch.exe
Token: 33	2584	Patch.exe
Token: SeIncBasePriorityPrivilege	2584	Patch.exe
Token: 33	2584	Patch.exe
Token: SeIncBasePriorityPrivilege	2584	Patch.exe
Token: 33	2584	Patch.exe
Token: SeIncBasePriorityPrivilege	2584	Patch.exe
Token: 33	2584	Patch.exe
Token: SeIncBasePriorityPrivilege	2584	Patch.exe
Token: 33	2584	Patch.exe
Token: SeIncBasePriorityPrivilege	2584	Patch.exe
Token: 33	2584	Patch.exe
Token: SeIncBasePriorityPrivilege	2584	Patch.exe
Token: 33	2584	Patch.exe
Token: SeIncBasePriorityPrivilege	2584	Patch.exe
Token: 33	2584	Patch.exe
Token: SeIncBasePriorityPrivilege	2584	Patch.exe
Token: 33	2584	Patch.exe
Token: SeIncBasePriorityPrivilege	2584	Patch.exe
Token: 33	2584	Patch.exe
Token: SeIncBasePriorityPrivilege	2584	Patch.exe
Token: 33	2584	Patch.exe
Token: SeIncBasePriorityPrivilege	2584	Patch.exe
Token: 33	2584	Patch.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1916	xx.exe
2968	xx.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 876 wrote to memory of 2584	876	fda31f149676a5c9010d283b6302cbd148691b3129ce4481e8d8c4fe2912639b.exe	78
PID 876 wrote to memory of 2584	876	fda31f149676a5c9010d283b6302cbd148691b3129ce4481e8d8c4fe2912639b.exe	78
PID 876 wrote to memory of 1916	876	fda31f149676a5c9010d283b6302cbd148691b3129ce4481e8d8c4fe2912639b.exe	79
PID 876 wrote to memory of 1916	876	fda31f149676a5c9010d283b6302cbd148691b3129ce4481e8d8c4fe2912639b.exe	79
PID 876 wrote to memory of 1916	876	fda31f149676a5c9010d283b6302cbd148691b3129ce4481e8d8c4fe2912639b.exe	79
PID 1916 wrote to memory of 2968	1916	xx.exe	83
PID 1916 wrote to memory of 2968	1916	xx.exe	83
PID 1916 wrote to memory of 2968	1916	xx.exe	83
PID 1916 wrote to memory of 2968	1916	xx.exe	83
PID 1916 wrote to memory of 2968	1916	xx.exe	83
PID 1916 wrote to memory of 2968	1916	xx.exe	83
PID 1916 wrote to memory of 2968	1916	xx.exe	83
PID 1916 wrote to memory of 2968	1916	xx.exe	83

C:\Users\Admin\AppData\Local\Temp\fda31f149676a5c9010d283b6302cbd148691b3129ce4481e8d8c4fe2912639b.exe
"C:\Users\Admin\AppData\Local\Temp\fda31f149676a5c9010d283b6302cbd148691b3129ce4481e8d8c4fe2912639b.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:876
- C:\Users\Admin\AppData\Local\Temp\Patch.exe
  "C:\Users\Admin\AppData\Local\Temp\Patch.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  PID:2584
- C:\Users\Admin\AppData\Local\Temp\xx.exe
  "C:\Users\Admin\AppData\Local\Temp\xx.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1916
- - C:\Users\Admin\AppData\Local\Temp\xx.exe
    "C:\Users\Admin\AppData\Local\Temp\xx.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    PID:2968

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x304 0x4bc
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3388

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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\Patch.exe

Filesize
518KB

MD5
6301f314bc5be80a8e26ef3a64d3822b

SHA1
c5fe8dd7166ae2fe6d2e867738b2d7521dd26b3d

SHA256
037dbb8f9f7e7cc78d89c68494620739123546bb3267369e897d6f1f1fa52c69

SHA512
fd2ebeb0f7046cc7a7be7e44302306745131aa46f9a7fe97d9e65fbaac143f542c2c47f7e1a53e5a002ba33cf0991aefda2e2c3851995fda236a9427b7a37e69

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

Filesize
518KB

MD5
6301f314bc5be80a8e26ef3a64d3822b

SHA1
c5fe8dd7166ae2fe6d2e867738b2d7521dd26b3d

SHA256
037dbb8f9f7e7cc78d89c68494620739123546bb3267369e897d6f1f1fa52c69

SHA512
fd2ebeb0f7046cc7a7be7e44302306745131aa46f9a7fe97d9e65fbaac143f542c2c47f7e1a53e5a002ba33cf0991aefda2e2c3851995fda236a9427b7a37e69

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

Filesize
135KB

MD5
3e1e1fb050ac689fa976dd7e609da144

SHA1
492236ddd4f02a9a6e19dda741ea9214d312ad8e

SHA256
870fde24efd33834476251fda9f8e3b5b91bfedc113871b5556928e497105c6a

SHA512
b1724000e88c6b36f46f2ac09a83462227c330fb1d62a967d422539350da4a52f5c6a67bd98bdf2368ce05066f9096e1c1b640b9b22248729fd470fb906960e6

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

Filesize
135KB

MD5
3e1e1fb050ac689fa976dd7e609da144

SHA1
492236ddd4f02a9a6e19dda741ea9214d312ad8e

SHA256
870fde24efd33834476251fda9f8e3b5b91bfedc113871b5556928e497105c6a

SHA512
b1724000e88c6b36f46f2ac09a83462227c330fb1d62a967d422539350da4a52f5c6a67bd98bdf2368ce05066f9096e1c1b640b9b22248729fd470fb906960e6

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

Filesize
135KB

MD5
3e1e1fb050ac689fa976dd7e609da144

SHA1
492236ddd4f02a9a6e19dda741ea9214d312ad8e

SHA256
870fde24efd33834476251fda9f8e3b5b91bfedc113871b5556928e497105c6a

SHA512
b1724000e88c6b36f46f2ac09a83462227c330fb1d62a967d422539350da4a52f5c6a67bd98bdf2368ce05066f9096e1c1b640b9b22248729fd470fb906960e6

Download Submit
memory/1916-141-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1916-145-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1916-155-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2584-140-0x00007FFA431F0000-0x00007FFA43C26000-memory.dmp

Filesize
10.2MB

Download
memory/2584-142-0x000000001F230000-0x000000001F240000-memory.dmp

Filesize
64KB

Download
memory/2584-143-0x000000001F240000-0x000000001F250000-memory.dmp

Filesize
64KB

Download
memory/2584-144-0x000000001F230000-0x000000001F240000-memory.dmp

Filesize
64KB

Download
memory/2584-146-0x000000001F240000-0x000000001F250000-memory.dmp

Filesize
64KB

Download
memory/2968-151-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/2968-152-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/2968-148-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/2968-156-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/2968-157-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download