General

  • Target

    0x000b000000012302-60.dat

  • Size

    240KB

  • Sample

    220806-pma5nshaf5

  • MD5

    fb89428c77f974f5c1a131bbece97af0

  • SHA1

    9869ea531f5fe38592e706d3f08493eacb1a6a24

  • SHA256

    10b55c2169ea6cd93a60641ef69b714010eac3383f6f9d127356d064a8be62d2

  • SHA512

    27d0fb7998ba5eec89e1ff2b45362f60982d8f8f9050e2c6bc7df517a3307c07375b9a5a113f5fcea6ebe8e1829ed51affc6186db99ae6a966922634a32cfa28

Malware Config

Extracted

Family

oski

C2

rgjeweller.mu/oski/

Targets

    • Target

      0x000b000000012302-60.dat

    • Size

      240KB

    • MD5

      fb89428c77f974f5c1a131bbece97af0

    • SHA1

      9869ea531f5fe38592e706d3f08493eacb1a6a24

    • SHA256

      10b55c2169ea6cd93a60641ef69b714010eac3383f6f9d127356d064a8be62d2

    • SHA512

      27d0fb7998ba5eec89e1ff2b45362f60982d8f8f9050e2c6bc7df517a3307c07375b9a5a113f5fcea6ebe8e1829ed51affc6186db99ae6a966922634a32cfa28

    • Detect Neshta payload

    • Modifies system executable filetype association

    • Neshta

      Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.

    • Oski

      Oski is an infostealer targeting browser data, crypto wallets.

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Loads dropped DLL

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Change Default File Association

1
T1042

Defense Evasion

Modify Registry

1
T1112

Credential Access

Credentials in Files

2
T1081

Discovery

Query Registry

3
T1012

System Information Discovery

3
T1082

Collection

Data from Local System

2
T1005

Tasks