oski | 79f2322a266f7ae7af5686670d8e8bc93661506340aab5e9d63fd23517bbbdd0

General

Target

83437762e281a39dd2e3d24a77bed412.exe
Size

1.3MB
MD5

83437762e281a39dd2e3d24a77bed412
SHA1

c818383759ac632ba7b418e3a830d0a9e90b7cbb
SHA256

79f2322a266f7ae7af5686670d8e8bc93661506340aab5e9d63fd23517bbbdd0
SHA512

e0edffaa9b1d221e8210c9078ce8e3fa72ece476d87d01bb9d998924e718be65546717f3cf08e65d514b3069b2bbb2e6854469ac837df31866a92e9919643d77

Score

10^/10

oski discovery infostealer spyware stealer

Malware Config

Extracted

Family

oski

C2

swsaseguranca.com.br

Signatures

Oski
Oski is an infostealer targeting browser data, crypto wallets.
infostealer oski
Downloads MZ/PE file
Loads dropped DLL 3 IoCs

Processes:

83437762e281a39dd2e3d24a77bed412.exe

pid process

2084 83437762e281a39dd2e3d24a77bed412.exe
2084 83437762e281a39dd2e3d24a77bed412.exe
2084 83437762e281a39dd2e3d24a77bed412.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
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Suspicious use of SetThreadContext 1 IoCs

Processes:

83437762e281a39dd2e3d24a77bed412.exe

description pid process target process

PID 3520 set thread context of 2084 3520 83437762e281a39dd2e3d24a77bed412.exe 83437762e281a39dd2e3d24a77bed412.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

pid	process
2084	83437762e281a39dd2e3d24a77bed412.exe
2084	83437762e281a39dd2e3d24a77bed412.exe
2084	83437762e281a39dd2e3d24a77bed412.exe

description	pid	process	target process
PID 3520 set thread context of 2084	3520	83437762e281a39dd2e3d24a77bed412.exe	83437762e281a39dd2e3d24a77bed412.exe

Checks processor information in registry 2 TTPs 1 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

83437762e281a39dd2e3d24a77bed412.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	83437762e281a39dd2e3d24a77bed412.exe

Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

396 schtasks.exe
Kills process with taskkill 1 IoCs
evasion

Processes:

taskkill.exe

pid process

2404 taskkill.exe

pid	process
396	schtasks.exe

pid	process
2404	taskkill.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

83437762e281a39dd2e3d24a77bed412.exepowershell.exepowershell.exe

pid	process
3520	83437762e281a39dd2e3d24a77bed412.exe
3520	83437762e281a39dd2e3d24a77bed412.exe
2884	powershell.exe
2052	powershell.exe
2884	powershell.exe
2052	powershell.exe
2884	powershell.exe
2052	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

83437762e281a39dd2e3d24a77bed412.exepowershell.exepowershell.exetaskkill.exe

description	pid	process
Token: SeDebugPrivilege	3520	83437762e281a39dd2e3d24a77bed412.exe
Token: SeDebugPrivilege	2052	powershell.exe
Token: SeDebugPrivilege	2884	powershell.exe
Token: SeDebugPrivilege	2404	taskkill.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

83437762e281a39dd2e3d24a77bed412.exe83437762e281a39dd2e3d24a77bed412.execmd.exe

description	pid	process	target process
PID 3520 wrote to memory of 2884	3520	83437762e281a39dd2e3d24a77bed412.exe	powershell.exe
PID 3520 wrote to memory of 2884	3520	83437762e281a39dd2e3d24a77bed412.exe	powershell.exe
PID 3520 wrote to memory of 2884	3520	83437762e281a39dd2e3d24a77bed412.exe	powershell.exe
PID 3520 wrote to memory of 2052	3520	83437762e281a39dd2e3d24a77bed412.exe	powershell.exe
PID 3520 wrote to memory of 2052	3520	83437762e281a39dd2e3d24a77bed412.exe	powershell.exe
PID 3520 wrote to memory of 2052	3520	83437762e281a39dd2e3d24a77bed412.exe	powershell.exe
PID 3520 wrote to memory of 396	3520	83437762e281a39dd2e3d24a77bed412.exe	schtasks.exe
PID 3520 wrote to memory of 396	3520	83437762e281a39dd2e3d24a77bed412.exe	schtasks.exe
PID 3520 wrote to memory of 396	3520	83437762e281a39dd2e3d24a77bed412.exe	schtasks.exe
PID 3520 wrote to memory of 2084	3520	83437762e281a39dd2e3d24a77bed412.exe	83437762e281a39dd2e3d24a77bed412.exe
PID 3520 wrote to memory of 2084	3520	83437762e281a39dd2e3d24a77bed412.exe	83437762e281a39dd2e3d24a77bed412.exe
PID 3520 wrote to memory of 2084	3520	83437762e281a39dd2e3d24a77bed412.exe	83437762e281a39dd2e3d24a77bed412.exe
PID 3520 wrote to memory of 2084	3520	83437762e281a39dd2e3d24a77bed412.exe	83437762e281a39dd2e3d24a77bed412.exe
PID 3520 wrote to memory of 2084	3520	83437762e281a39dd2e3d24a77bed412.exe	83437762e281a39dd2e3d24a77bed412.exe
PID 3520 wrote to memory of 2084	3520	83437762e281a39dd2e3d24a77bed412.exe	83437762e281a39dd2e3d24a77bed412.exe
PID 3520 wrote to memory of 2084	3520	83437762e281a39dd2e3d24a77bed412.exe	83437762e281a39dd2e3d24a77bed412.exe
PID 3520 wrote to memory of 2084	3520	83437762e281a39dd2e3d24a77bed412.exe	83437762e281a39dd2e3d24a77bed412.exe
PID 3520 wrote to memory of 2084	3520	83437762e281a39dd2e3d24a77bed412.exe	83437762e281a39dd2e3d24a77bed412.exe
PID 2084 wrote to memory of 424	2084	83437762e281a39dd2e3d24a77bed412.exe	cmd.exe
PID 2084 wrote to memory of 424	2084	83437762e281a39dd2e3d24a77bed412.exe	cmd.exe
PID 2084 wrote to memory of 424	2084	83437762e281a39dd2e3d24a77bed412.exe	cmd.exe
PID 424 wrote to memory of 2404	424	cmd.exe	taskkill.exe
PID 424 wrote to memory of 2404	424	cmd.exe	taskkill.exe
PID 424 wrote to memory of 2404	424	cmd.exe	taskkill.exe

C:\Users\Admin\AppData\Local\Temp\83437762e281a39dd2e3d24a77bed412.exe
"C:\Users\Admin\AppData\Local\Temp\83437762e281a39dd2e3d24a77bed412.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3520

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\83437762e281a39dd2e3d24a77bed412.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2884

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\fOQvCYq.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2052

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\fOQvCYq" /XML "C:\Users\Admin\AppData\Local\Temp\tmp822C.tmp"
2⤵
- Creates scheduled task(s)
PID:396

C:\Users\Admin\AppData\Local\Temp\83437762e281a39dd2e3d24a77bed412.exe
"C:\Users\Admin\AppData\Local\Temp\83437762e281a39dd2e3d24a77bed412.exe"
2⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:2084

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c taskkill /pid 2084 & erase C:\Users\Admin\AppData\Local\Temp\83437762e281a39dd2e3d24a77bed412.exe & RD /S /Q C:\\ProgramData\\050269847921466\\* & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:424

C:\Windows\SysWOW64\taskkill.exe
taskkill /pid 2084
4⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:2404

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Credentials in Files

2

T1081

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log
MD5
1c19c16e21c97ed42d5beabc93391fc5

SHA1
8ad83f8e0b3acf8dfbbf87931e41f0d664c4df68

SHA256
1bcd97396c83babfe6c5068ba590d7a3f8b70e72955a9d1e4070648e404cbf05

SHA512
7d18776d8f649b3d29c182ff03efc6cea8b527542ee55304980f24577aae8b64e37044407776e220984346c3998ace5f8853afa58c8b38407482a728e9495e0c

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
MD5
51aed1af0851c707fd7b4b15161cd2a6

SHA1
00b004b0da5cc1e764eceeef0a0458772a91f3b2

SHA256
213fc20613ef5d195c1d7dc39f802528cf3f32f0faf0b20f7916cddbce5b0c71

SHA512
6daf7a0b4afa3ebb0cfe9598eee5ae2c495675fe2e28b68ea48e1bd95a19cc87559ce39dd737acbaaf04939709b4d6025a20c5c33456b3d804df98c2a8fdf7ba

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp822C.tmp
MD5
b535b436872524e05d79b2ae16748f3c

SHA1
82d4a3bd5688d24a311573c1a0d48c39846d9ab1

SHA256
8d6e1b742813edc164a713de8d69926a26d4894f05d45b461cbce55e937f5998

SHA512
a955de01ea3746193b6faf25b2b274ea04f524696862aedf7e4e0103e241305b7e1812a2a95b5bda96970c23c35661a309de70bcb69e7704294e313ac5cc664b

Download Submit
\ProgramData\mozglue.dll
MD5
8f73c08a9660691143661bf7332c3c27

SHA1
37fa65dd737c50fda710fdbde89e51374d0c204a

SHA256
3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

SHA512
0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

Download Submit
\ProgramData\nss3.dll
MD5
bfac4e3c5908856ba17d41edcd455a51

SHA1
8eec7e888767aa9e4cca8ff246eb2aacb9170428

SHA256
e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

SHA512
2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

Download Submit
\ProgramData\sqlite3.dll
MD5
e477a96c8f2b18d6b5c27bde49c990bf

SHA1
e980c9bf41330d1e5bd04556db4646a0210f7409

SHA256
16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660

SHA512
335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c

Download Submit
memory/396-130-0x0000000000000000-mapping.dmp

Download
memory/424-277-0x0000000000000000-mapping.dmp

Download
memory/2052-128-0x0000000000000000-mapping.dmp

Download
memory/2052-139-0x0000000006C70000-0x0000000006C71000-memory.dmp

Filesize
4KB

Download
memory/2052-201-0x000000007ECF0000-0x000000007ECF1000-memory.dmp

Filesize
4KB

Download
memory/2052-233-0x0000000006883000-0x0000000006884000-memory.dmp

Filesize
4KB

Download
memory/2052-144-0x0000000006882000-0x0000000006883000-memory.dmp

Filesize
4KB

Download
memory/2052-158-0x00000000040F0000-0x00000000040F1000-memory.dmp

Filesize
4KB

Download
memory/2052-156-0x0000000007D40000-0x0000000007D41000-memory.dmp

Filesize
4KB

Download
memory/2052-132-0x00000000040F0000-0x00000000040F1000-memory.dmp

Filesize
4KB

Download
memory/2052-133-0x00000000040F0000-0x00000000040F1000-memory.dmp

Filesize
4KB

Download
memory/2052-154-0x0000000007E50000-0x0000000007E51000-memory.dmp

Filesize
4KB

Download
memory/2052-143-0x0000000006880000-0x0000000006881000-memory.dmp

Filesize
4KB

Download
memory/2084-145-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2084-138-0x000000000040717B-mapping.dmp

Download
memory/2084-137-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2404-316-0x0000000000000000-mapping.dmp

Download
memory/2884-141-0x0000000007320000-0x0000000007321000-memory.dmp

Filesize
4KB

Download
memory/2884-152-0x0000000008020000-0x0000000008021000-memory.dmp

Filesize
4KB

Download
memory/2884-142-0x0000000007322000-0x0000000007323000-memory.dmp

Filesize
4KB

Download
memory/2884-125-0x0000000000000000-mapping.dmp

Download
memory/2884-146-0x0000000007890000-0x0000000007891000-memory.dmp

Filesize
4KB

Download
memory/2884-149-0x0000000007F90000-0x0000000007F91000-memory.dmp

Filesize
4KB

Download
memory/2884-150-0x0000000008200000-0x0000000008201000-memory.dmp

Filesize
4KB

Download
memory/2884-189-0x0000000009610000-0x0000000009611000-memory.dmp

Filesize
4KB

Download
memory/2884-131-0x0000000007960000-0x0000000007961000-memory.dmp

Filesize
4KB

Download
memory/2884-236-0x0000000007323000-0x0000000007324000-memory.dmp

Filesize
4KB

Download
memory/2884-159-0x0000000003430000-0x0000000003431000-memory.dmp

Filesize
4KB

Download
memory/2884-129-0x0000000004D80000-0x0000000004D81000-memory.dmp

Filesize
4KB

Download
memory/2884-173-0x0000000009870000-0x00000000098A3000-memory.dmp

Filesize
204KB

Download
memory/2884-127-0x0000000003430000-0x0000000003431000-memory.dmp

Filesize
4KB

Download
memory/2884-202-0x000000007F210000-0x000000007F211000-memory.dmp

Filesize
4KB

Download
memory/2884-126-0x0000000003430000-0x0000000003431000-memory.dmp

Filesize
4KB

Download
memory/3520-123-0x00000000060E0000-0x00000000060E1000-memory.dmp

Filesize
4KB

Download
memory/3520-120-0x0000000005480000-0x0000000005481000-memory.dmp

Filesize
4KB

Download
memory/3520-121-0x00000000055C0000-0x00000000055C8000-memory.dmp

Filesize
32KB

Download
memory/3520-122-0x00000000056F0000-0x00000000056F1000-memory.dmp

Filesize
4KB

Download
memory/3520-124-0x0000000006180000-0x00000000062A2000-memory.dmp

Filesize
1.1MB

Download
memory/3520-119-0x0000000005240000-0x000000000573E000-memory.dmp

Filesize
5.0MB

Download
memory/3520-115-0x0000000000850000-0x0000000000851000-memory.dmp

Filesize
4KB

Download
memory/3520-118-0x0000000005320000-0x0000000005321000-memory.dmp

Filesize
4KB

Download
memory/3520-117-0x0000000005740000-0x0000000005741000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads