A Soviet Lend Lease Sherman that was converted to a "prime mover."  I'm assuming this means it was used as an APC, something of a rarity in the Red Army.  No further information...
Nick

Sherman Tank APC Conversion

This - modification of the famous rocket launcher "Katyusha" (nicknamed  "Andrew"),  fired  projectiles of caliber 310 mm (as opposed to the 132-mm shells "Katyusha). It fired 12 rockets (2 rows  of 6 ).  The system was built on the American truck chassis "Studebaker» (Studebaker US6), which was delivered to the USSR under Lend-Lease

rocket launcher BM-31-12 in Berlin 

Soviet Red Army Shermans mounting the 76mm gun pushing into Austria at the foot of the Alps, 1945.  The Soviets actually received a few more  Shermans mounting 76mm guns than the 75mm cannon.  According to a thread over at AxisForums, the Russians received around 4,100 Shermans.  They were used primarily by Guards formations...
Nick