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IOC - A cunning predator: How Silver Fox preys on Japanese firms this tax season
Japan has entered its annual tax filing and organizational change season, a period when companies generate a high volume of legitimate financial and HR‑related communications. A threat actor known as Silver Fox is actively exploiting this busy period by conducting a targeted spearphishing campaign against Japanese manufacturers and other businesses.
Indicators of Compromise (47 / 168 total)
| TYPE | INDICATOR | DESCRIPTION | CREATED | |
|---|---|---|---|---|
| FileHash-MD5 | 050bded9abb9d590ed856494c627e2e9 | — | 2026-04-02 | |
| FileHash-MD5 | 0d46afcac922062342e351601a05ba97 | — | 2026-04-02 | |
| FileHash-MD5 | 12a0d942652609bce7319be6bf0135bb | MD5 of 2328e572532f382e237e7a1b74cb0531308f5704 | 2026-04-02 | |
| FileHash-MD5 | 16889dfe3c5507bd6c55346276380ea5 | — | 2026-04-02 | |
| FileHash-MD5 | 1af5b25acd2df31f44a54fc8dcd85287 | MD5 of 56cf8418fb7b599fe4df5e4b879ecb813132109a | 2026-04-02 | |
| FileHash-MD5 | 21d9a30074d65babfef9e9e9684c6f5a | MD5 of 11a1e60fc3d57ea652903239d46d245a512d2e53 | 2026-04-02 | |
| FileHash-MD5 | 263282a6d3169db2b5288fae4ca1628b | — | 2026-04-02 | |
| FileHash-MD5 | 2640d822edeb61b361e23456258fc1f2 | — | 2026-04-02 | |
| FileHash-MD5 | 267f48e174bdbece4235cf200dfc2503 | — | 2026-04-02 | |
| FileHash-MD5 | 2dd81ae480816ae59982ef0b28308ec7 | — | 2026-04-02 | |
| FileHash-MD5 | 30b7014370b42268d9f2f234ede3c473 | — | 2026-04-02 | |
| FileHash-MD5 | 336996263be598b498348855e7fda71c | — | 2026-04-02 | |
| FileHash-MD5 | 36f265dabe69ae16e7baf0c15aa86dd2 | — | 2026-04-02 | |
| FileHash-MD5 | 38ecc57332dff5e505aae33528dbc4d2 | — | 2026-04-02 | |
| FileHash-MD5 | 4096a3df3f2c1e12ad8baf65b7aa627e | — | 2026-04-02 | |
| FileHash-MD5 | 45828acc0fda6fb7a79c18f697cf634b | — | 2026-04-02 | |
| FileHash-MD5 | 4f481a449ad050fea9ca3900118e5676 | MD5 of 80c5d1ae1ee86f607fdefbbc5f88c5539f8582b5 | 2026-04-02 | |
| FileHash-MD5 | 50cde63b1135cf39f4a3aed90cf15c11 | — | 2026-04-02 | |
| FileHash-MD5 | 52638a930b4c3ff5603978d674bb9415 | — | 2026-04-02 | |
| FileHash-MD5 | 547054bcbf78f8e07964e82b642e60b9 | — | 2026-04-02 | |
| FileHash-MD5 | 5661f72a6ba1598ba49e63fa121ef015 | — | 2026-04-02 | |
| FileHash-MD5 | 5c1239a2612987393a706b33eb9ea27c | — | 2026-04-02 | |
| FileHash-MD5 | 5d29469672159fdb5d4aa4e02d36f60b | MD5 of 589a931024960b253a34e3fca58c89368822d8fc | 2026-04-02 | |
| FileHash-MD5 | 6533bcf04eb69e5119ceec156c41897f | MD5 of 469e41dde5a31bc91af8aa5db807f9f29f85510d | 2026-04-02 | |
| FileHash-MD5 | 65c2906d5afc04e4685eb41a84cb5205 | — | 2026-04-02 | |
| FileHash-MD5 | 6a55f2125228850d7ed7318d8110dfe8 | — | 2026-04-02 | |
| FileHash-MD5 | 6c870da5e21b65a7436adcd446ca1f41 | — | 2026-04-02 | |
| FileHash-MD5 | 6d0905d0445a6ffd48138d1fc9a7fc9a | — | 2026-04-02 | |
| FileHash-MD5 | 7a1c4ccea43f902d9c9f4a24f3524567 | MD5 of 4e6755a713bc7192f075312c1c499ac4ee9d70c2 | 2026-04-02 | |
| FileHash-MD5 | 82faa81f31ab74977ef8ca65157ae2fd | — | 2026-04-02 | |
| FileHash-MD5 | 83584cb8043edf2f8bdefddf0ce843b4 | — | 2026-04-02 | |
| FileHash-MD5 | 8f8d4f67ebc47521f5e69b63636c0498 | — | 2026-04-02 | |
| FileHash-MD5 | 976a9b5742718833641a4303f567ac88 | — | 2026-04-02 | |
| FileHash-MD5 | a4489b07cb56be156e340272df8c79a8 | — | 2026-04-02 | |
| FileHash-MD5 | a5b0f1fba15e570655d3bedee0d2cdca | — | 2026-04-02 | |
| FileHash-MD5 | a8b1f1fd03ea1c063e60ef840b5fe382 | — | 2026-04-02 | |
| FileHash-MD5 | b4247e276f9c0032957db9f28f84d88f | — | 2026-04-02 | |
| FileHash-MD5 | b46f6df63070ceaf93418a666c685a0e | — | 2026-04-02 | |
| FileHash-MD5 | baf07b67203378151f1566ba9ce28b56 | — | 2026-04-02 | |
| FileHash-MD5 | d1f691ef37c839d17567057a21b75bdb | — | 2026-04-02 | |
| FileHash-MD5 | d260e063dc9b0f89576d8b18c8536054 | — | 2026-04-02 | |
| FileHash-MD5 | d72a7a69fbabb6c684b72ac3c9857c0a | — | 2026-04-02 | |
| FileHash-MD5 | d83f279a67a3374514c8b08d9e1f4df9 | — | 2026-04-02 | |
| FileHash-MD5 | dfb07265ffe8a82a3d912c3a3fee5382 | MD5 of 93ffb9a59a3658dad9febc1221922832a5edf5b4 | 2026-04-02 | |
| FileHash-MD5 | e65c67def0ae80c05200965934455a05 | MD5 of 092d8e457cb9c54a757dad082740a45db67812ed | 2026-04-02 | |
| FileHash-MD5 | ecc2413899119db053dea97fce09b7f7 | — | 2026-04-02 | |
| FileHash-MD5 | f64c9e981ee29a4c1812327ea61bb5ce | — | 2026-04-02 |